Pneumatic Valve Adapter for Bicycle Tire

Abstract

A pneumatic valve adapter that couples with a valve stem of a bicycle tire is provided. The valve adapter comprises a cap, a seal, a biasing member, and a sealing member. The cap includes a pin passage and a circumferential concavity on an outer diameter. The receiver is coupled to the cap and is couplable with the valve stem, the receiver having a first opening that is fluidly coupled to a central passage. The seal has a circular shape and cross-section, the seal is disposed between the cap and the end of the receiver, the seal having a second hole that fluidly couples the first opening and the pin passage. The biasing member is disposed in the central passage. The sealing member is disposed within the central passage and biased against the seal by the biasing member, the sealing member being movable between a first position and a second position.

Claims

1. A pneumatic valve adapter configured to couple with a valve stem of a bicycle tire, the pneumatic valve adapter comprising: a cap member having a pin passage therethrough having a first diameter and having a circumferential concavity on an outer diameter; a receiver coupled to the cap member and having a fastener configured to removably couple with the valve stem, the receiver having a first opening on an end that is fluidly coupled to a central passage, the first opening having a second diameter; a seal having a circular shape and a circular cross-section, the seal disposed between the cap member and the end of the receiver, the seal having a second hole with a third diameter that fluidly couples the first opening and the pin passage, the third diameter being smaller than the first diameter; a biasing member disposed in the central passage; and a sealing member movably disposed within the central passage and biased against the seal by the biasing member, the sealing member being movable between a first position engaging the seal and a second position separated from the seal and allowing a flow of gas from the pin passage to the central passage.

2. The adapter of claim 1, further comprising: an engagement plate disposed within the central passage; and an actuator pin operably coupled to the engagement plate, the actuator pin being sized to extend into the bicycle tire valve stem.

3. The adapter of claim 1, wherein the engagement plate is perforated to fluidly couple the central passage to the valve stem.

4. The adapter of claim 1, further comprising a seal disposed between the valve stem and the receiver.

5. The adapter of claim 3, wherein the engagement plate defines a shoulder, the biasing member is disposed between the shoulder and the sealing member.

6. A bicycle inner tube comprising: a pressure vessel configured to receive pressurized air; a valve stem operably coupled to the pressure vessel; and a pneumatic valve adapter comprising: a cap member having a pin passage therethrough having a first diameter and having a circumferential concavity on an outer diameter; a receiver coupled to the cap member and having a fastener configured to removably couple with the valve stem, the receiver having a first opening on an end opposite the valve stem that is fluidly coupled to a central passage, the first opening having a second diameter, the central passage being fluidly coupled to the pressure vessel via the valve stem; a seal having a circular shape and a circular cross-section, the seal disposed between the cap member and the end of the receiver, the seal having a second hole with a third diameter that fluidly couples the first opening and the pin passage, the third diameter being smaller than the first diameter; a biasing member disposed in the central passage; and a sealing member movably disposed within the central passage and biased against the seal by the biasing member, the sealing member being movable between a first position engaging the seal and a second position separated from the seal and allowing a flow of gas from the pin passage to the central passage.

7. The bicycle inner tube of claim 6, wherein the pressure vessel is an inner tube.

8. The bicycle inner tube of claim 6, wherein the valve stem includes a valve having a first actuation pin.

9. The bicycle inner tube of claim 8, wherein the pneumatic valve adapter further comprises: an engagement plate disposed within the central passage; and a second actuator pin operably coupled to the engagement plate, the actuator pin being sized to extend into the valve stem and engage the first actuation pin.

10. The bicycle inner tube of claim 9, wherein the engagement plate is perforated to fluidly couple the central passage to the valve stem.

11. The bicycle inner tube of claim 6, wherein the sealing member is a sealing rod having a plug for engagement with the seal and a shaft.

12. The bicycle inner tube of claim 11, wherein the shaft of the sealing rod is operable to contact the actuation pin of said pre-existing valve.

13. The bicycle inner tube of claim 12, wherein the shaft of the sealing rod member is operable to axially move into the valve stem and engage the actuation pin.

14. A bicycle tire inflation system for a bicycle tire having a valve stem, the system comprising: the pneumatic valve adapter comprising: a cap member having a pin passage therethrough having a first diameter and having a circumferential concavity on an outer diameter; a receiver coupled to the cap member and having a fastener configured to removably couple with the valve stem, the receiver having a first opening on an end that is fluidly coupled to a central passage, the first opening having a second diameter; a seal having a circular shape and a circular cross-section, the seal disposed between the cap member and the end of the receiver, the seal having a second hole with a third diameter that fluidly couples the first opening and the pin passage, the third diameter being smaller than the first diameter; a biasing member disposed in the central passage; and a sealing member movably disposed within the central passage and biased against the seal by the biasing member, the sealing member being movable between a first position engaging the seal and a second position separated from the seal and allowing a flow of gas from the pin passage to the central passage; a pump head having an inflation pin having a diameter that is greater than the third diameter, the pump head being configured to removably couple to the pneumatic valve adapter.

15. The system of claim 14, wherein the pump head further includes at least one ball is operable to engage with the circumferential concavity during operation when the pump head is coupled to the pneumatic valve adapter.

16. The system of claim 15, further comprising a sleeve disposed about the at least one ball and configured to bias the at least one ball into the circumferential concavity during operation when the pump head is coupled to the pneumatic valve adapter.

17. The system of claim 14, wherein the inflation pin is sized to pass through the pin passage and seal against the seal during operation when the pump head is coupled to the pneumatic valve adapter.

18. The system of claim 14, wherein the pump head further comprises an intake passage and an air source attachment member.

19. The system of claim 14, wherein the pump head further comprises a pin seat configured to engage the inflation pin and a connecting passage that is in fluid communication with the inflation pin and the air intake passage.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0057] FIG. 1A provides a cross-section side view of an improved pneumatic valve system, according to an embodiment of the present invention.

[0058] FIG. 1B provides a cross-sectional side view of an improved pneumatic valve system, according to an embodiment of the present invention.

[0059] FIG. 2A provides an exploded perspective view of a valve stem of an improved pneumatic valve system, according to an embodiment of the present invention.

[0060] FIG. 2B provides a cross-sectional view of a valve cap of an improved pneumatic valve system, according to an embodiment of the present invention.

[0061] FIG. 3A provides a cross-sectional side view of a pin seat of an improved pneumatic valve system, according to an embodiment of the present invention.

[0062] FIG. 3B provides a perspective view of a pin seat of an improved pneumatic valve system, according to an embodiment of the present invention.

[0063] FIG. 4 provides a perspective view of an inflation pin of an improved pneumatic valve system, according to an embodiment of the present invention.

[0064] FIG. 5A provides a cross-sectional side view of a valve coupler housing of an improved pneumatic valve system, according to an embodiment of the present invention.

[0065] FIG. 5B provides a perspective view of a valve coupler housing of an improved pneumatic valve system, according to an embodiment of the present invention.

[0066] FIG. 6 provides an exploded view of an improved pneumatic valve system, according to an embodiment of the present invention.

[0067] FIG. 7A provides a cross-sectional view of an improved pneumatic valve system, according to an embodiment of the present invention.

[0068] FIG. 7B provides a cross-sectional view of valve mechanism components an improved pneumatic valve system, according to an embodiment of the present invention.

[0069] FIG. 7C provides a cross-sectional view of valve mechanism components an improved pneumatic valve system, according to an embodiment of the present invention.

[0070] FIG. 8 provides a cross-sectional view of an improved pneumatic valve system, according to an embodiment of the present invention.

[0071] FIG. 9 provides an exploded view of a pneumatic valve adapter system, according to an embodiment of the present invention.

[0072] FIG. 10 provides a cross-sectional view of a pneumatic valve adapter system, according to an embodiment of the present invention.

[0073] FIG. 11 provides perspective views of a pneumatic valve adapter system, according to an embodiment of the present invention.

[0074] FIG. 12A provides a cross-sectional view of a pneumatic valve adapter system, according to an embodiment of the present invention.

[0075] FIG. 12B provides a cross-sectional view of a pneumatic valve adapter system, according to an embodiment of the present invention.

[0076] FIG. 13 provides a cross-sectional view of a pneumatic valve adapter system, according to an embodiment of the present invention.

[0077] FIG. 14A provides an elevation view of a pneumatic valve adapter system, according to an embodiment of the present invention.

[0078] FIG. 14B provides a cross-sectional view of a pneumatic valve adapter system, according to an embodiment of the present invention.

[0079] FIG. 14C provides a cross-sectional view of a pneumatic valve adapter system, according to an embodiment of the present invention.

[0080] FIG. 15 provides a cross-sectional view of a pneumatic valve adapter system, according to an embodiment of the present invention.

DETAILED DESCRIPTION

[0081] Reference will now be made in detail to certain embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in reference to these embodiments, it will be understood that they are not intended to limit the invention. To the contrary, the invention is intended to cover alternatives, modifications, and equivalents that are included within the spirit and scope of the invention. In the following disclosure, specific details are given to provide a thorough understanding of the invention. However, it will be apparent to one skilled in the art that the present invention may be practiced without all of the specific details provided.

[0082] The present invention concerns a pneumatic valve system for easily attaching and sealing a valve coupler to a valve stem. As seen in FIGS. 1A-5B, the valve system 100 may comprise the following major components: a valve stem 101, a valve cap 110, a sealing member 120 biased by a biasing member 125, and a valve coupler 130 comprising a coupler housing 131, a pin seat 150, an inflation pin 160, and an elastic sleeve 170.

[0083] The valve stem 101 may be attached to and in fluid communication with a pressurizable vessel (e.g., a bicycle tire tube). The valve stem 101 may act as an inlet and outlet for the vessel, and allow for easy and secure connection with the valve coupler 130, which may be in fluid communication with a pressurized air source (e.g., an air compressor, not shown), in order to pressurize the vessel 199. The valve stem 101 may comprise an airtight passage between the pressurizable vessel 199 and the valve cap 110. The valve stem 101 may comprise a tubular shape having a central passage 102, a first end 103 and a second end 104, the first end 103 comprising a base attached to the vessel 199, and the second end 104 may comprise an open end having a threading 105 with a shape complementary to the shape of a threading 115 of the valve cap 110.

[0084] The second end 104 of the valve stem 101 may comprise a shoulder 106 on an inner surface thereof, the shoulder 106 being operable to provide a seat for supporting the biasing member 125 (e.g., a spring), the biasing member 125 providing an elastic force for biasing the sealing member 120 toward a sealed position (e.g., against a sealing ring 116 of the valve cap 110). The biasing member 125 may comprise a substantially cylindrical shape (e.g., an open coil shape) having an outer diameter complementary to an inner diameter of the second end 104 of the valve stem 101. The sealing member 120 may comprise a substantially spherical shape and the biasing member 125 may have an inner diameter smaller than an outer diameter of the sealing member 120, such that the sealing member 120 is operable to sit on or partly nest in a distal end 126 of the biasing member 125. The outer diameter of the sealing member 120 may be substantially smaller than an inner diameter of the central passage 102 of the valve stem 101, such that the sealing member 120 may move freely within the central passage 102 and air may pass around the sealing member 120 when the sealing member 120 is in an open position (e.g., not seated against the sealing ring 116 of the valve cap 110, see FIG. 1B).

[0085] The valve cap 110 may comprise a proximal end 111 and a distal end 112. The proximal end 111 may comprise a substantially cylindrical shape and an inner surface having a threading 115 complementary to the threading 105 of the second end 104 of the valve stem 101, allowing the proximal end 111 of the valve cap 110 to securely attach to the distal end 104 of the valve stem 101 in an air-tight manner. The distal end 112 of the valve cap 110 may comprise an outer surface having a rounded circumferential concavity 113 for removably attaching to the valve coupler 130, and a pin passage 114 substantially coaxial with the central passage 102 of the valve stem 101. The pin passage 114 may comprise a diameter complementary to a diameter of the inflation pin 160, such that the inflation pin 160 may pass through the pin passage 114 and into the central passage 102 of the valve stem 101.

[0086] The sealing ring 116 of the valve cap 110 may have a circular shape and a substantially circular or ovoid cross-sectional shape, and may comprise an elastomeric material. The sealing ring 116 may have an outer diameter complementary to an inner diameter of the valve cap 110, and the sealing ring 116 may have an inner diameter substantially smaller than an outer diameter of the sealing member 120, such that the sealing ring 116 may provide a stop against which the sealing member 120 is biased by the biasing member 125. When the valve stem 104 is not engaged with the valve coupler 130, contact between the sealing member 120 and sealing ring 116 forms an airtight seal against the air pressure in the vessel 119. An inner diameter of the sealing ring 116 may be less than or equal to an outer diameter of the inflation pin 160, such that inflation pin 160 may pass through the sealing ring 116 (which may deform or stretch slightly to allow passage of the inflation pin 160), forming an airtight seal between the inflation pin 160 and the sealing ring 116 against the air pressure inside the vessel 199.

[0087] In other embodiments, the sealing member 120 may engage with a tri-point ball seat 116a to seal the valve cap 110. The tri-point seat 116a is composed of fused or integrally molded portions of two spherical caps, one having a cross-sectional area that is 10-15% larger than that of the sealing member 120 and the other spherical cap may have a cross-sectional that is 10-15% smaller than that of the sealing ball 221. The spherical caps may be axially aligned, with the smaller of the two caps position over the larger, with a passage in the smaller spherical cap to allow the passage of fluid through the valve cap. The tri-point seat may positioned in the valve cap 110 adjacent and just below the sealing ring 116 and may be supported at its inferior end by the internal shoulder created by the upper rim of threading 105, as shown in FIGS. 2A-2B. The tri-point seat 116a may be made from high tensile strength, high hardness metal.

[0088] As best seen in FIGS. 3A and 3B, the pin seat 150 may comprise a proximal end 151 and a distal end 152, a threading 153 for attaching to the coupler housing 130, a pin receiver 154, and a connecting passage 155. The distal end 152 may comprise a substantially disc-shaped head having an outer diameter greater than an outer diameter of the proximal end 151, and a slot 156 having a substantially square cross section. The slot 156 may traverse the upper surface of the distal end 152 and may be positioned such that a longitudinal axis of the slot 152 is aligned in parallel with a first branch 155a of the connecting passage 155, and orthogonal to a second branch 155b of the connecting passage 155. Thus, a user may be able to determine the position of each of the first branch 155a and second branch 155b when the pin seat 150 is threaded into the coupler housing 131 by observing the position of the slot 156. The user may further be able to determine the position of the air inlet passage 135 of the coupler housing 131 by observing the position of the air source attachment member 132, and align at least one of the first branch 155a and the second branch 155b with the air inlet passage 135 by aligning the slot 156 with (in parallel with or orthogonal to) the air source attachment member 132. Fluid communication may thus be achieved from the air source (not shown), through the air source attachment member 132 and the air passage 135, through the connecting passage 155, and into the central passage 161 of the inflation pin 160 (and subsequently into the valve stem 101 when the valve coupler 131 is engaged therewith). In some embodiments, the coupler housing 131 may have a space around the connecting passage, such that each of the branches of the connection passage are in fluid communication with the air inlet passage 135.

[0089] The proximal end 151 of the pin seat 150 may comprise a pin receiver 157, the pin receiver 157 comprising a passage substantially co-axial with a central axis of the coupler housing 131 and with the central passage 102 of the valve stem 101. The pin receiver 157 may be operable to receive a first end 162 of the inflation pin 160, the pin receiver 157 having an inner diameter complementary to an outer diameter of the inflation pin 160. Along with a sealing ring 133 of the coupler housing 131, the pin receiver 157 may be operable to hold the inflation pin 160 in a substantially static manner when the first end 162 thereof is engaged with (e.g., inserted into) the pin receiver 157.

[0090] As best seen in FIG. 4, the inflation pin 160 may comprise a substantially cylindrical shape defining a central passage 161, the central passage 161 having an inlet 164 at a proximal end 162 of the inflation pin 160, and an outlet 165 at a distal end 163 of the inflation pin 160. The proximal end 162 may be operable to be inserted into the pin receiver 157 of the pin seat 150 and may be in fluid communication with the connecting passage 155. When engaging the valve coupler 130 with the valve stem 101, the second end 163 of the inflation pin 160 may be operable to be inserted into and to pass through the pin passage 114 of the valve cap 110, and may thereby pass into the central passage 102 of the valve stem 101. The outlet 165 may be arranged on a lateral outer surface of the distal end 163, rather than on a leading surface 166, the leading surface 166 therefore being free to contact and push the sealing member 120 away from the sealing ring 116 as the inflation pin 160 enters the valve stem 101, without blocking an air flow out of the outlet 165.

[0091] The coupler housing 131 of the valve coupler 130 may comprise an air source attachment member 132, a threading 136 for attaching to the pin seat 150, and a collar 140 for attaching to the valve cap 110. The coupler housing 131 may comprise a rigid material (i.e., a metal, a metal alloy, a plastic, a carbon fiber, and the like) and a generally cylindrical shape (see FIG. 5B) having a central passage 137 which is substantially co-axial with the central passage 102 of the valve stem 101 when the valve coupler 130 is engaged with the valve stem 101. The central passage 137 of the coupler housing 131 may have an inner surface having a threading 136 for securing the pin seat 150 in place in the central passage 137. The coupler housing 131 may comprise a first sealing ring 133 and a second sealing ring 134, the first sealing ring 133 being positioned to create an airtight seal between the distal end 151 of the pin seat 150 and a first shoulder 138 of the coupler housing 131 when the pin seat 150 is threaded into the coupler housing 131. The second sealing ring 134 may be positioned to create an airtight seal between the proximal end 152 of the pin seat 150 and a second shoulder 139 of the coupler housing 131.

[0092] The air source attachment member 132 may comprise a plurality of outer circumferential barbs, and may be operable to be inserted into a central passage of a pneumatic hose (not shown). The central passage of the pneumatic hose may be substantially elastic and operable to create an airtight connection with the plurality of barbs of the air source attachment member 132.

[0093] The valve coupler 130 may comprise a plurality of ball bearings 141 nested in a plurality of passages 142 traversing the wall of the collar 140, each of the plurality of ball bearings 141 being inwardly biased by the elastic bearing sleeve 170 enveloping the collar 140. The plurality of passages 142 in the wall of the collar 140 may comprise an outer end which defines an opening in an outer surface of the collar 140, and an inner end which defines an opening in an inner surface of the collar 140 (see FIG. 5A). Each passage 142 may comprise a substantially cylindrical shape except that the inner end is narrowed in comparison to the rest of the passage (i.e., the inner end has a smaller diameter than the rest of the passage). Each ball bearing 141 may have an outer diameter substantially greater than a diameter of the inner end of the passage 142, and substantially greater than the thickness of the wall of the collar 140 (see FIG. 1A), such that the ball bearing 141 cannot pass completely through the passage 142, but a portion of the ball bearing 141 may protrude through the narrowed end of the passage 142. Because the ball bearing 141 is wider than the wall of the collar 140, the elastic sleeve 170 will contact and elastically bias the ball bearing 141 toward the inner end of the passage 142. The ball bearing 142 may thus extend into the circumferential concavity 113 of the valve cap 110 when the valve coupler 130 is engaged with the valve stem 101 (see FIG. 1B), securing the valve coupler 130 in place on the valve stem 101.

[0094] The valve coupler 130 may be engaged with the valve stem 101 by simply aligning the collar 140 with the valve cap 110 and applying linear force against the valve coupler (toward the valve stem) with one hand. As seen in FIG. 1B, this action may cause the collar 140 to slide down over and engage with the valve cap 110. The force applied against the valve coupler 130 must be sufficient to: 1) cause the ball bearings 141 of the collar 140 to move outwardly against the inward force of the elastic sleeve 170 in order to slide over an upper lip 117 of the valve cap 110 before moving back inwardly into the circumferential concavity 113, and 2) cause the second end 163 of the inflation pin 160 to insert through the center of the sealing ring 116 and disengage the sealing member 120 from the sealing ring 116 against the force of the biasing member 125, such that the outlet 165 of the inflation pin 160 moves past the sealing ring 116 and into the fluid communication with the central passage 102 of the valve stem 101.

[0095] FIGS. 6-8 illustrate an additional embodiment of a pneumatic valve system for easily attaching and sealing a valve coupler to a valve stem that includes two independent seals. As seen in FIG. 6, the valve system 200 may comprise the following major components: a valve stem 201, a valve cap 210, a first chamber 281 that includes a first sealing member 220 biased by a biasing member 225, a second chamber 282 that includes a second sealing member 221, a dual—seal valve core 285 defining the connection between the two chambers 281 and 282, and a valve coupler 130 as described above, having a coupler housing 131, a pin seat 150, an inflation pin 160, and an elastic sleeve 170. The two independent sealing mechanisms in two separate chambers 281 and 282 eliminate the pressure loss that occurs in conventional valve designs when the pump-head is decoupled from the valve stem, which can be significant (e.g., up to 10 PSI). The upper chamber 281 may include a sealing ring 216 against which a first sealing member 220 is pressed when in a closed position, and the lower chamber 282 may include a sealing seat 286.

[0096] The first sealing member 220 may be a sealing rod having a tapering plug 220a at its upper end that engages with the sealing ring 216 when in a closed position. A biasing spring 225 may be positioned in the upper chamber 281 and engaged with the sealing rod 220 and may bias the sealing rod 220 toward the sealing member 216. The sealing rod 220 may be engaged with the biasing spring 225 by having a portion nested within the spring 225. The bottom end of the biasing spring 225 may be seated on a shoulder 206 of the dual—seal valve core 285 at the lower end of the first chamber 281. A filter 228 may be included in the upper chamber 281 that is operable to catch particulate matter and prevent the introduction of particulates into the valve stem 201 or an inflatable vessel to which it is attached. The particulate filter 228 may have a ring structure that is positioned around the shaft of the sealing rod 220 between the plug 220a and the biasing spring 225 such that it is maintained in a position adjacent to the plug 220a. The particulate filter 228 may be a metal mesh material or a perforated metal disk (e.g., laser-perforated stainless steel, aluminum, or other rigid material).

[0097] The valve cap 210 may comprise a lower end 211 and an upper end 212. The lower end 211 may comprise a substantially cylindrical shape and an inner surface having a threading 215 complementary to the threading 205 of the upper end 204 of a dual seal valve core that is positioned between the two chambers 281 and 282. stem 201, allowing the upper end 211 of the valve cap 210 to securely attach to the upper end 204a of the dual—seal valve core 285 in an air-tight manner. The upper end 212 of the valve cap 210 may comprise an outer surface having a rounded circumferential concavity 213 for removably attaching to the valve coupler 130, and a pin passage 214 substantially coaxial with the dual—seal valve core 285 and the valve stem 201. The pin passage 214 may comprise a diameter complementary to a diameter of the inflation pin 160, such that the inflation pin 160 may pass through the pin passage 214 and into the valve stem 201.

[0098] The sealing ring 216 of the valve cap 210 may have a circular shape and a substantially circular or ovoid cross-sectional shape, and may comprise an elastomeric material. The sealing ring 216 may have an outer diameter complementary to an inner diameter of the valve cap 210, and the sealing ring 216 may have an inner diameter substantially smaller than an outer diameter of the sealing plug 220a, such that the sealing ring 216 may provide a stop against which the sealing member 220 is biased by the biasing member 225. The sealing ring 216 may be positioned between the upper circumference of the dual-seal valve core 285 and a shoulder 212 of the valve cap 210. When the valve coupler 130 is not engaged with the valve cap 210, contact between the sealing plug 220a and sealing ring 216 forms an airtight seal against the air pressure in the vessel. An inner diameter of the sealing ring 216 may be less than or equal to an outer diameter of the inflation pin 160, such that inflation pin 160 may pass through the sealing ring 116 (which may deform or stretch slightly to allow passage of the inflation pin 160), forming an airtight seal between the inflation pin 160 and the sealing ring 216 against the air pressure inside the vessel.

[0099] The second chamber 282 may include a second sealing mechanism that includes a sealing member 221, which may be a substantially spherical rigid ball (e.g., stainless steel, aluminum, or other non-corrodible material) that engages with a complementary seat 218 that provides a relatively large surface area interface between the sealing member 221 and the complementary seat 218. The complementary seat 218 may have a spherical cap shape comprised of flexible thermoplastic, Buna-N Nitrile, gum rubber, Hypalon™, Neoprene™, polyurethane, SBR (red rubber), silicone, Viton™, fluorosilicone, ethylene propylene, butyl, or other materials. The material can be somewhat flexible such that it flexes when the sealing member 221 against the seat 218 by the internal pressure of the pressurized vessel. The second chamber 282 may or may not include a biasing member. The sealing member 221 in the second chamber 282 may be held in place in the seat 218 by the pneumatic pressure in the vessel to which the valve stem 201 is connected.

[0100] In other embodiments, the seat 218 may be a tri-point ball seat 218a. The tri-point seat 218a is composed of fused or integrally molded portions of two spherical caps, one having a cross-sectional area that is 10-15% larger than that of the sealing ball 221 and the other spherical cap may have a cross-sectional that is 10-15% smaller than that of the sealing ball 221. The spherical caps may be axially aligned with the smaller of the two position over the larger, with a passage in the small spherical cap to allow the passage of air or other gases through the valve. The tri-point seat 218a may be made from high tensile strength, high hardness metal.

[0101] The seat 218 (or 218a) may be positioned on the inferior side of the shoulder 206 of the dual — seal valve core 285, within the second chamber 282. The dual seal valve core 285 may be positioned between the inferior portion of the valve cap 210 and the upper portion of the valve stem 201 by threaded or other mechanical connections. The dual—seal valve core 285 may include a lower threaded portion 285b that connects to threaded receiver 205 in the upper portion of the valve stem 201. The threaded receiver 205 may have a shape complementary to the shape of lower threaded portion 285b. The valve stem 201 may be attached to and in fluid communication with a pressurizable vessel (e.g., a bicycle tire tube), and may act as an inlet and outlet for the vessel.

[0102] A gasket 283 may be positioned between the lower threaded portion 285b and a shoulder 203 at the lower aspect of threaded receiver of the valve stem 201. A washer 290 may positioned over the gasket 283. The washer 290 may prevent the sealing member 221 from seating in the lower passage of the second chamber during inflation. This “stand-off” washer 290 may be a cage-like structure or may have leaf-like projections that allow the passage of air or other inflation gas around the washer 290 when the sealing member 221 is in contact with the washer 290. The washer 290 may have an outer diameter substantially equal to the inner diameter of the lower threaded portion 285b of the dual-seal valve core 285, such that the washer may be maintained in position over the gasket 283.

[0103] The valve coupler 130 may be engaged with the valve cap 210 by simply aligning the collar 140 with the valve cap 210 and applying linear force against the valve coupler (toward the valve stem) with one hand. As seen in FIG. 8, this action may cause the collar 140 to slide down over and engage with the valve cap 210. The force applied against the valve coupler 130 must be sufficient to: 1) cause the ball bearings 141 of the collar 140 to move outwardly against the inward force of the elastic sleeve 170 in order to slide over an upper lip 217 of the valve cap 210 before moving back inwardly into the circumferential concavity 213, 2) cause the second end 163 of the inflation pin 160 to insert through the center of the sealing ring 216 and disengage the sealing rod 220 from the sealing ring 216 against the force of the biasing member 225, such that the outlet 265 of the inflation pin 160 moves past the sealing ring 216 and into the fluid communication with the interior of the first chamber 281; and 3) cause the lower end of the sealing rod 220 to engage with the second sealing member 221 in the second chamber 282 and displace the second sealing member 221 from the seat 218 opening the second seal of the valve 200. Air or other gas may then flow through inflation needle 160 into the first chamber 281 and then through the passage between the first and second chambers and through the second chamber 282 to inflate the vessel. +

[0104] FIGS. 9-11 illustrate an additional embodiment of a pneumatic valve adapter system 300 for easily attaching and sealing a valve coupler 130 to a pre-existing valve stem 301 with an adapter device 310 attached thereto. The valve adapter system 300 is operable for use with existing pneumatic valve systems (e.g., a Schrader valve). As seen in FIG. 9, the valve adapter system 300 may comprise the following major components: a valve stem adapter 310, a pin passage 314 for accepting an actuating pin from the pump-head assembly, sealing gasket 316, and a valve coupler 130 as described above, having a coupler housing 131, a pin seat 150, an inflation pin 160, and an elastic sleeve 170.

[0105] Conventional Schrader valves include an actuation pin that is pressed when a conventional pump-head is attached thereto. The movement of the actuation pin displaces a plug at the lower end of the actuation pin to open the valve. As shown in FIGS. 10-11, the adapter device 310 of the present invention has a threaded female receiver 315 that is complementary to the exterior male threading 355 of a conventional Schrader valve 350 and operable to securely threaded onto the Schrader valve stem 350 in an air-tight manner. A sealing gasket 316 may be positioned between an internal shoulder 320 of the adapter device 310 and the upper rim 356 of the Schrader valve stem. The sealing gasket 316 may have a circular shape, and may comprise an elastomeric material. The sealing gasket 316 may have an outer diameter complementary to an inner diameter of the adapter device 310 and an inner diameter less than or equal to an outer diameter of the inflation pin 160, such that inflation pin 160 may pass through the sealing gasket 316 (which may deform or stretch slightly to allow passage of the inflation pin 160), forming an airtight seal between the inflation pin 160 and the sealing gasket 316 against the air pressure inside a pneumatic vessel to which the Schrader valve 350 is attached.

[0106] The adapter device 310 may comprise an outer surface having a rounded circumferential concavity 313 for removably attaching to the valve coupler 130, and a pin passage 314 substantially coaxial with the actuator pin 352 of the Schrader valve stem 350. The pin passage 314 may comprise a diameter complementary to a diameter of the inflation pin 160, such that the inflation pin 160 may pass through the pin passage 314 and contact the actuator pin 352 of the Schrader valve stem 350.

[0107] The valve coupler 130 may be engaged with the adapter device 310 by simply aligning the collar 140 with the adapter device 310 and applying linear force against the valve coupler (toward the adapter device 310) with one hand. As shown in FIG. 10, this action may cause the collar 140 to slide down over and engage with the adapter device 310. The force applied against the valve coupler 130 must be sufficient to 1) cause the ball bearings 141 of the collar 140 to move outwardly against the inward force of the elastic sleeve 170 in order to slide over an upper lip 317 of the adapter device 310 before moving back inwardly into the circumferential concavity 313, and 2) cause the inflation pin 160 to insert through the center of the gasket 316 and displace the actuator pin 352 and a sealing plug 352a at its lower end to open the Schrader valve 350. Air or other gas may then flow through inflation needle 160 and then through the Schrader valve 350 to inflate the vessel.

[0108] FIGS. 12A-13 illustrate an additional embodiment of a pneumatic valve adapter system 400 for easily attaching and sealing a valve coupler 130 to a pre-existing valve stem 401 with an adapter device 410 attached thereto. The valve adapter system 400 is operable for use with existing pneumatic valve systems (e.g., a Presta valve, Dunlop valve, or Schrader valve). As seen in FIG. _, the valve adapter system 400 may comprise the following major components: 1) a valve stem adapter 410 having a pin passage 414 for accepting an inflation pin 160 from the pump-head assembly 100, a sealing gasket 416, and 2) a pump-head 100 having a valve coupler 130 as described above with a coupler housing 131, a pin seat 150, an inflation pin 160, and an elastic sleeve 170.

[0109] The valve core of conventional valves (e.g., a Presta valve) can be removed, eliminating the valve actuation mechanism. An adapter device 401 may then be attached to the remaining stem of the conventional valve with valve mechanism according to the present invention. As shown in FIGS. 12A-12B, the adapter device 401 of the present invention may have a stem connector 402 that has a threaded female receiver 403 that is complementary to the exterior male threading 455 of a conventional valve 450 and operable to securely threaded onto the valve stem 450a in an air-tight manner. A sealing gasket 406 may be positioned between a recess 406a of the stem connector 402 and the outer diameter of the conventional valve stem 450a. The sealing gasket 406 may prevent pressured air from escaping from the valve adapter 401 during inflation or otherwise. The stem connector 402 also includes an upper male connector 404 that may connect to an adapter cap 410.

[0110] The adapter cap 410 may comprise a proximal end 411 and a distal end 412. The lower end 411 may comprise a substantially cylindrical shape and an inner surface having a threading 415 complementary to threading of the upper male connector 404 of the stem connector 402, allowing the lower end 411 of the adapter cap 410 to securely attach to the upper male connector 404 of the stem connector 401 in an air-tight manner.

[0111] The distal end 412 of the adapter cap 410 may comprise an outer surface having a rounded circumferential concavity 413 for removably attaching to the valve coupler 130, and a pin passage 414 substantially coaxial with the conventional valve stem 450. The pin passage 414 may comprise a diameter complementary to a diameter of the inflation pin 160, such that the inflation pin 160 may pass through the pin passage 414 and into the interior of the adapter cap. A sealing mechanism may be positioned between the upper male connector 404 and the adapter cap 410. The stem connector 401 has a shoulder 405 in the interior diameter of the upper male connector 404. A biasing member 425 (e.g., a spring) may be positioning within the male connector 404 with its lower end seated on shoulder 405. A sealing member 420 may be positioned above the biasing member 425 such that the biasing member biases the sealing member toward the pin passage 414 in adapter cap 410.

[0112] A sealing ring 416 of the valve cap 410 may have a circular shape and a substantially circular or ovoid cross-sectional shape, and may comprise an elastomeric material. The sealing ring 416 may have an outer diameter complementary to an inner diameter of the adapter cap 410, and the sealing ring 416 may have an inner diameter substantially smaller than an outer diameter of the sealing member 420, such that the sealing ring 416 may provide a stop against which the sealing member 420 is biased by the biasing member 425. When the adapter cap 410 is not engaged with the valve coupler 130, contact between the sealing member 420 and sealing ring 416 forms an airtight seal against the air pressure in a pneumatic vessel to which the valve stem 450 is attached. An inner diameter of the sealing ring 416 may be less than or equal to an outer diameter of the inflation pin 160, such that inflation pin 160 may pass through the sealing ring 416 (which may deform or stretch slightly to allow passage of the inflation pin 160), forming an airtight seal between the inflation pin 160 and the sealing ring 416 against the air pressure inside the pneumatic vessel.

[0113] The valve coupler 130 may be engaged with the adapter device 410 by simply aligning the collar 140 with the adapter cap 410 and applying linear force against the valve coupler (toward the adapter cap 410) with one hand. As shown in FIG. 13, this action may cause the collar 140 to slide down over and engage with the adapter cap 410. The force applied against the valve coupler 130 must be sufficient to 1) cause the ball bearings 141 of the collar 140 to move outwardly against the inward force of the elastic sleeve 170 in order to slide over an upper lip 417 of the adapter cap 410 before moving back inwardly into the circumferential concavity 413, and 2) cause the inflation pin 160 to insert through the center of the sealing ring 416 and displace the sealing member 420 to open valve mechanism. Air or other gas may then flow through inflation needle 160 and then through the adapter device 401.

[0114] FIGS. 14A-15 illustrate an additional embodiment of a pneumatic valve adapter system 500 for easily attaching and sealing a valve coupler 130 to a pre-existing valve stem 501 with an adapter device 510 attached thereto. The valve adapter system 500 is operable for use with existing pneumatic valve systems (e.g., a Schrader valve, Presta valve, and others). As seen in FIG. 14B, the valve adapter system 500 may comprise the following major components: 1) a valve stem adapter 501 having a pin passage 514 for accepting an inflation pin 560 from the pump-head assembly 100, a sealing gasket 516, and 2) a pump-head 100 having a valve coupler 130 as described above with a coupler housing 131, a pin seat 150, an inflation pin 160, and an elastic sleeve 170.

[0115] The adapter device 501 may include an engagement member 519 for engaging the actuation pin 590 of a conventional valve stem 550, which is operable to hold the conventional valve stem in an open position when the adapter device 501 is attached to the conventional valve stem 550. The valve mechanism of the adapter device 501 may then exclusively control the flow of fluid from the adapter device 501 to through the conventional valve stem 550. The engagement member may include a engagement plate 519a that substantially perpendicular to the path of fluid through the adapter device 501 and the engagement plate 519a may have perforations 519b therein for allowing the passage of fluid therethrough. The engagement plate 519 may also include an inferior protrusion that extend downward to meet an actuate an actuation pin 590 of the conventional valve stem 550. When the adapter device is attached to the pre-existing valve stem 550a, the actuation pin 590 is displaced inferiorly, thereby displacing plug 591 and allowing fluid to pass through the pre-existing valve stem 550.

[0116] The adapter device 501 may be attached to the conventional valve stem of the conventional valve with valve mechanism according to the present invention. As shown in FIGS. 14A-14B, the adapter device 501 of the present invention may have a stem connector 502 that has a threaded female receiver 503 that is complementary to the exterior male threading 555 of a conventional valve 550 and operable to securely threaded onto the valve stem 550a in an air-tight manner. A sealing gasket 506 may be positioned between a recess 506a of the stem connector 502 and the outer diameter of the conventional valve stem 550a. The sealing gasket 506 may prevent pressured air from escaping from the valve adapter 501 during inflation or otherwise. The stem connector 502 also includes an upper male connector 504 that may connect to an adapter cap 510.

[0117] The adapter cap 510 may comprise a proximal end 511 and a distal end 512. The lower end 511 may comprise a substantially cylindrical shape and an inner surface having a threading 515 complementary to threading of the upper male connector 504 of the stem connector 502, allowing the lower end 511 of the adapter cap 510 to securely attach to the upper male connector 504 of the stem connector 501 in an air-tight manner.

[0118] The distal end 512 of the adapter cap 510 may comprise an outer surface having a rounded circumferential concavity 513 for removably attaching to the valve coupler 130, and a pin passage 514 substantially coaxial with the conventional valve stem 550. The pin passage 514 may comprise a diameter complementary to a diameter of the inflation pin 160, such that the inflation pin 160 may pass through the pin passage 514 and into the interior of the adapter cap 510. A sealing mechanism may be positioned between the upper male connector 504 and the adapter cap 510. The stem connector 501 has a shoulder 505 in the interior diameter of the upper male connector 504. A biasing member 525 (e.g., a spring) may be positioning within the male connector 504 with its lower end seated on shoulder 505. A sealing member 520 may be positioned above the biasing member 525 such that the biasing member biases the sealing member toward the pin passage 514 in adapter cap 510.

[0119] A sealing ring 516 of the valve cap 510 may have a circular shape and a substantially circular or ovoid cross-sectional shape, and may comprise an elastomeric material. The sealing ring 516 may have an outer diameter complementary to an inner diameter of the adapter cap 510, and the sealing ring 516 may have an inner diameter substantially smaller than an outer diameter of the sealing member 520, such that the sealing ring 516 may provide a stop against which the sealing member 520 is biased by the biasing member 525. When the adapter cap 510 is not engaged with the valve coupler 130, contact between the sealing member 520 and sealing ring 516 forms an airtight seal against the air pressure in a pneumatic vessel to which the valve stem 550 is attached. An inner diameter of the sealing ring 516 may be less than or equal to an outer diameter of the inflation pin 160, such that inflation pin 160 may pass through the sealing ring 516 (which may deform or stretch slightly to allow passage of the inflation pin 160), forming an airtight seal between the inflation pin 160 and the sealing ring 516 against the air pressure inside the pneumatic vessel.

[0120] The valve coupler 130 may be engaged with the adapter device 510 by simply aligning the collar 140 with the adapter cap 510 and applying linear force against the valve coupler (toward the adapter cap 510) with one hand. As shown in FIG. 15, this action may cause the collar 140 to slide down over and engage with the adapter cap 510. The force applied against the valve coupler 130 must be sufficient to 1) cause the ball bearings 141 of the collar 140 to move outwardly against the inward force of the elastic sleeve 170 in order to slide over an upper lip 517 of the adapter cap 510 before moving back inwardly into the circumferential concavity 513, and 2) cause the inflation pin 160 to insert through the center of the sealing ring 516 and displace the sealing member 520 to open valve mechanism. Air or other gas may then flow through inflation needle 160 into the adapter device 501, through the perforations 519a of the engagement plate 519, and then through the pre-existing valve stem 550a.

[0121] The foregoing descriptions of specific embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated.