Foot ring and collar for pressurized tank

Abstract

Disclosed is a tank foot ring comprising: a body for supporting a pressurized tank made of polymeric material; and the body having an open end enclosing a hollow space or spaces on which a bottom portion of the pressurized tank rests and wherein the open end is in air flow communication with such hollow space or spaces, and an opposing surface for contacting a ground surface on which the foot ring rests. The opposing surface has a series of openings for drainage of water from the hollow space or spaces. Further provided is a collar for mounting on a top portion of a pressurized tank. The collar comprises: a body, a fastening system and a rotatable lid disposed on the collar. Further provided is a collar with a window cut-out for viewing tank data and a regulator mounting clip for securing a regulator of the tank in place during use.

Claims

1. A tank foot ring comprising: a body made of polymeric material for supporting a pressurized tank, the body having an annular portion, the annular portion having an open end and a wall defining a hollow space or spaces therein, the wall comprising an outer wall, an inner wall and a base wall, the base wall for contacting a ground surface on which the foot ring rests when in use, the outer and inner walls at proximal ends configured for abutting a bottom portion of the pressurized tank and wherein the open end of the annular portion is in air flow communication with the hollow space or spaces, and a plurality of radial rib members extending inwardly from the inner wall of the hollow annular portion and wherein the radial rib members converge towards and join at a central point or region of the foot ring, the radial rib members defining an open space that is in air flow communication with the bottom of the tank when in use, the base wall of the annular portion and/or a base portion of the radial rib members having a series of openings for drainage of water from the hollow space or spaces when the foot ring is in use.

2. The tank foot ring of claim 1, wherein the hollow annular portion and the base portion of the plurality of radial rib members form an opposing surface that contacts the ground surface on which the foot ring rests.

3. The tank foot ring of claim 2, wherein the opposing surface comprises depressions and/or protrusions formed therein to reduce slippage of the tank foot ring when in use.

4. The tank of claim 1, wherein at least two of the radial rib members comprise respective longitudinal grooves.

5. The tank foot ring of claim 1, wherein the foot ring is releasably attachable to the bottom portion of the pressurized tank.

6. The tank foot ring of claim 1, wherein the foot ring is releasably attachable to the bottom portion of the pressurized tank by tabs formed on the bottom of the tank, and wherein the tabs and an outside wall of the foot ring each comprise openings that receive a shaft of a fastener when aligned.

7. The tank foot ring of claim 1, wherein each one of the radial rib members has a depth D so as to contact the ground surface at one side and the bottom portion of the pressurized tank at the other side when the foot ring is mounted on the tank.

8. The tank foot ring of claim 1, wherein the foot ring has a diameter that is at least 10% less than the diameter of the tank body.

9. The tank foot ring of claim 8, wherein the foot ring has a diameter that is at least 20% less than the diameter of the tank body.

10. The tank foot ring of claim 1, wherein the foot ring is configured to accommodate a tank weight of at least 400 pounds.

11. The tank foot ring of claim 1, wherein an opposing surface of the foot ring for contacting the ground comprises depressions configured to reduce slippage thereof.

12. The of claim 1, wherein the radial rib members comprise respective longitudinal grooves.

13. The foot ring of claim 1, wherein the outer wall of the annular portion comprises recessed portions at an end that faces the bottom of the tank when the foot ring is in use.

14. A tank foot ring comprising: a body configured for supporting a pressurized tank that does not have a bottom mounted metal ring; the body of the foot ring having an end on which a bottom portion of the pressurized tank rests when in use, and an opposing surface for contacting a ground surface on which the foot ring rests; the body having an annular portion for supporting a bottom end of the pressurized tank, the annular portion having an open end for providing air flow communication with the bottom of the pressurized tank; a plurality of radial rib members extending inwardly from an inner wall of the annular portion and wherein the radial rib members converge towards and join at a central point or region of the foot ring; at least one of the radial rib members and annular portion having drainage holes; wherein the foot ring is made of polymeric material; and the body being releasably attachable directly to the bottom portion of the pressurized tank.

15. The tank foot ring of claim 14, wherein the body is releasably attachable to the bottom portion of the pressurized tank by tabs formed on the bottom of the tank that are attachable to the body of the foot ring by a fastener having a threaded shaft.

Description

BRIEF DESCRIPTION OF FIGURES

(1) FIG. 1 shows a pressurized fuel tank of the upright type having a collar and a foot ring according to one embodiment.

(2) FIG. 2 is a cross section of the fuel tank having the collar and foot ring.

(3) FIG. 3A is a cross-section of the foot ring.

(4) FIG. 3B is a three-dimensional elevational view of the foot ring.

(5) FIG. 3C is another three-dimensional elevational view of the foot ring.

(6) FIG. 3D is a cross section of the foot ring taken along the line of FIG. 3B.

(7) FIG. 4 is a cross section of the foot ring showing a fastening system according to one embodiment.

(8) FIG. 5A shows the collar mounted on the tank in an open position.

(9) FIG. 5B shows the collar mounted on the tank in a closed position.

(10) FIG. 6A shows an internal fastening system in three-dimension for mounting the collar on the tank according to one embodiment.

(11) FIG. 6B shows a cross-section of the internal fastening system.

(12) FIG. 7A shows a window cutout region in the collar in three-dimension for viewing data etched on a tab according to one embodiment.

(13) FIG. 7B shows data etched on the tab.

(14) FIG. 8A shows a regulator mounting bracket secured on the tank within the collar for holding a regulator in place.

(15) FIG. 8B is top plan view of the mounting bracket.

(16) FIG. 8C is a three-dimensional side elevation view of the mounting bracket.

(17) FIG. 8D is a three-dimensional side elevation view of the collar showing the regulator mounting bracket and a pocket formed in an inner wall of the collar for receiving the mounting bracket.

DETAILED DESCRIPTION

(18) FIG. 1 shows a pressurized propane tank 1 of the upright type used to store compressed fuel for use in industry or to heat a home. The body 10 of the tank 1 depicted in the embodiment shown in FIG. 1 can hold about 123 gallons or 420 lbs of propane and thus is significantly larger than the type of pressurized tank often used for backyard barbeque grills. Mounted on the bottom portion of the tank 1 is a foot ring 20 that is detachable from the tank by bolts 22A and 22B. The foot ring 20 provides a stable support for the tank 1 as described in detail below (in connection with FIGS. 2A and 2B). Suitable construction material for the foot ring 20 is composite plastic or other rust-proof polymeric material.

(19) The top portion of the propane tank 1 comprises a detachable plastic composite collar 30 having a lid 32 that pivots between open and closed positions as described below. (See FIG. 5A and FIG. 5B). The composite collar 30 protects valves formed in the top portion of the tank 1 from the elements or from being damaged during handling of the tank 1.

(20) FIG. 2 is a 3D cross-sectional view of the propane tank 1 shown in FIG. 1 with the bottom mounted foot ring 20 and the top mounted collar 30. The internal components are standard and include a liquid withdrawal dip tube 32, a liquid withdrawal valve 34, among other standard components that are omitted from the discussion for brevity.

(21) FIGS. 3A, 3B, 3C and 3D depict the foot ring 20 in more detail. As can be seen in FIGS. 3A-D, the foot ring 20 comprises a body 23 having an annular portion 24 comprising an outer vertical wall 36, inner vertical wall 38 and a base wall 40 that defines an internal hollow space 50. The distal ends of outer vertical wall 36 and inner vertical wall 38 abut the bottom portion of the tank 1 (excluding cut-out regions described below). Extending inwardly and upwardly from inner wall 38 is an inwardly angled wall 42. The inwardly angled wall 42 comprises a first wall portion 42A formed on the inner wall 38 and that extends at an angle of about 90 degrees therefrom and a second wall portion 42B that extends from the first wall portion 42A at an angle of about 45 degrees as measured from the vertical inner wall 38. The angled wall 42 is included for added structural support and defines the internal annular hollow space 50 in the annular portion 24 (see FIGS. 3A and 3D).

(22) The foot ring body 23 also includes six rib members 44A, 44B, 44C, 44D, 44E and 44F that extend radially inwardly from the annular portion 24 and converge at a central region 46 as best shown in FIG. 3B and FIG. 3C. The base wall 40 (see FIG. 3A) of the hollow annular portion 24 and the bottom walls of the plurality of rib members 44A, 44B, 44C, 44D, 44E and 44F together provide a stable surface on which the bottom portion of the foot ring that contacts the ground or other surface on which the foot ring 20 rests. As shown in FIG. 3C, each rib member 44A, 44B, 44C, 44D, 44E and 44F comprises one of a respective longitudinal groove 45A, 45B, 45C, 45D, 45E and 45F formed in its bottom wall that provides traction against the ground on which the foot ring 20 rests. Such grooves also minimize surface contact with the ground to aid in the drainage of water from the internal space. The grooves are best shown in FIG. 3C

(23) A series of circumferentially spaced-apart drainage openings are formed in the annular portion 24. Three of such drainage openings 54A, 54B and 54C are shown in FIG. 3C. Central drainage openings 56 are formed in a region where the rib members 44A, 44B, 44C, 44D, 44E and 44F converge.

(24) Traction is also provided by depressions and/or protrusions formed on the side of the annular ring that contacts a surface on which the foot ring is placed to reduce slippage of the tank foot ring when in use. In the embodiments shown in FIGS. 3B and 3C, a series of depressions 40A are formed annularly on the outer surface of base wall 40. In the embodiment shown, the depressions 40A are indentations that form a cross-hatched pattern.

(25) The foot ring 20 is releasably attachable to the bottom portion of the tank 1. Unlike prior designs, the attachment described in this embodiment does not accommodate an existing metal foot ring. The fastening system is shown in FIG. 3D and FIG. 4.

(26) An example of a suitable releasable attachment is through circumferentially spaced metal tabs welded on the bottom surface of the tank 1. In this example, the tank 1 has four tabs spaced circumferentially around the tank base. An example of one of such tabs is shown in FIG. 3D and FIG. 4 as tab 58. FIG. 3D shows a cross-sectional view of the foot ring taken along rib member 44F of FIG. 3B. In particular, the sectional line runs through the groove 45F of rib 44 as indicated in the drawing. FIG. 4 is a similar cross-section but taken along a line that passes through a region of annular portion 24 having a bolt 22A that secures the foot ring 30 to the base of the tank 1.

(27) As shown in FIG. 4, the tab 58 shown fits into a corresponding internal slotted region 60 formed in the annular portion 24 of the foot ring 20. The tab 58 and outer vertical wall 36 of the annular portion 24 comprise respective openings 64 and 62 which, when aligned, receive the bolt 22A for fastening the foot ring onto the bottom of the tank 1. The bolt 22A threads into a clip-on barrel nut shown as 22B (FIG. 4). Such clip-on nuts have a barrel with multiple threads for secure thread engagement with the bolt 22A. In one embodiment, a black-phosphate finish is used on the nut 22B that enhances corrosion resistance. Such nuts are commercially available from McMaster-Carr? in Cleveland, Ohio. However, other suitable fasteners known to those of skill in the art can be employed to secure the foot ring 20 onto the base of the tank 1.

(28) As shown in FIG. 3D, the rib member 44F has sufficient depth D so that, when in use, a side wall adjacent to groove 45F of the rib member 44F contacts a respective ground surface, thus providing added structural support to the foot ring 20 for bearing and distributing the weight of the tank. The remaining ribs 44A, 44B, 44C, 44D and 44E are configured in a similar manner to distribute weight radially around the foot ring 20. FIG. 3D is taken through a line running through a groove in the rib and so D in the drawing is of a length that corresponds to a length measured from the bottom of the tank to a portion of the rib 44F that touches the ground when the foot ring 20 is in use.

(29) Further, since the side of the foot ring 20 contacting the tank 1 is open or otherwise free of enclosing walls, the hollow spaces formed by the rib members 44A, 44B, 44C, 44D, 44E and 44F and hollow spaces 48 and 50 of the annular ring portion 24 are in air flow communication with the bottom portion of the tank 1. In addition, the upper portion of the outer wall 36 of foot ring 20 comprises spaced recessed portions 52A and 52B (FIG. 3C). Such a configuration provides enhanced air flow around the bottom portion of the tank 1 to reduce or prevent water build-up, which can in turn reduce or eliminate rust formation. Further, any water from the environment or condensation that builds up on the bottom portion of the tank 1 can pass through such hollow spaces 48 and 50 and through the series of drainage holes 54A, 54B, 54C that are provided in the annular portion 24 and central drainage holes (e.g. 56 in FIG. 3C) formed in a region where rib members 44A, 44B, 44C, 44D, 44E and 44F converge. Removal of water in this manner is advantageous in that it can prevent rust on the bottom of tank 1 that would otherwise occur with build-up of liquid within the hollow regions 48, 50.

(30) Turning now to FIG. 5A, there is shown a tank collar 30 for mounting on the top portion of an upright pressurized tank 1. The tank 1 shown in this embodiment can hold about 123 gallons or 420 lbs of propane and thus is significantly larger than the type of pressurized tank often used for barbeque grills. Such tanks 1 are often stored outside and thus require extra protection from the elements relative to typical backyard barbeque tanks.

(31) The tank collar 30 has a body 72 shown with cut-out regions 74A, 74B and 74C to permit air-flow therethrough. The lid 32 is rotatably attached to the body 72 of the tank collar 30. Formed on a side wall of the lid 32 is a lid coupling member 78A having a longitudinal hole to receive a pin 80. A corresponding body coupling member 78B is formed on the body 72 of the collar 30 and fits partially inside the lid coupling member 78A. A longitudinal hole formed in the body coupling member 78B aligns with the hole in the lid coupling member 78A and when aligned receives the pin 80 about which the lid 32 rotates.

(32) The tank collar 30 is attached to the top portion of the tank 1 with a series of tabs welded to the top of the tank that lock into corresponding clips formed in the body 72 of the collar 30.

(33) FIG. 6A is a three-dimensional view of the tank collar 30 showing its releasable attachment to the top of the tank 1. The tab 58A is shown formed on the top of the tank (secured by welding) and is one of three tabs that are arranged in spaced, circumferential relation on the top of the tank 1. The tab 58A fits into a clip element 70 including recessed portion 70 formed in a side wall of the tank collar 30. FIG. 6B is a cross-section of the collar, showing the tab 58A and the clip 70 in which the tab 58A fits. The clips enable a simple, releasable attachment of the collar 30 to the tank and does not require fasteners, such as screws, bolts or the like, to lock the collar snugly in place. This also reduces the number of components that are exposed to the elements and that can be subject to corrosion and require replacement. Thus, the collar clipping mechanism described herein facilitates ease of use and reduces maintenance costs.

(34) FIG. 7A shows an alternative embodiment in which tab 58A comprises data relating to the tank. In such embodiment, the collar 30 comprises a window cut-out region 81 allowing viewing of data provided on tab 58A. Such a data may provide information about the tank 1 that is required by regulators for the tank to be serviced.

(35) FIG. 7B provides non-limiting examples of such data and includes data 92 concerning the date and identifier information as well a quick response (AR) scan code 94. Other information may be included on the tab 58A as required. The data may be etched on the tab 58A by laser etching or by other suitable techniques known to those of skill in the art.

(36) Protection of the data on tab 58A by the enclosed tank collar 30 is advantageous as data etched on metal components exposed to the elements can corrode and prevent to the data from being legible. Thus, protection of the data by placing it on an enclosed tab 58A can avoid costly replacement of components comprising tank data. As used herein, the term data includes textual information and/or numerical information relating to characteristics or properties of the tank. Without limitation, such data may include information that is required by regulators.

(37) Moreover, in another embodiment, as shown in FIG. 8A, the collar 30 comprises a built-in regulator mounting member shown herein as a mounting bracket 86. The regulator mounting bracket 86 holds a regulator 84 in place on tank 1 and is protected from the elements by the enclosed space in the collar 30.

(38) FIGS. 8B and 8C show various views of mounting bracket 86, including a top plan view (FIG. 8B) and a side elevational view (FIG. 8C). At a first end 86A, the regulator mounting bracket 86 fits into a pocket 87, which is disposed on the tank collar 30. The opposing end 86B of mounting bracket 86 clips onto the regulator 84.

(39) FIG. 8D shows the pocket 87 in more detail. The pocket 87 is formed in an inner wall of the collar 30 and comprises a slot 88 for receiving the end 86A of the regulator mounting bracket 86.

(40) The foregoing description is merely illustrative of certain embodiments. Various modifications and substitutions can be made without departing from the scope of the invention. The scope of the invention is limited only by the claims appended hereto.