Combination paddle and pump

Abstract

A combined paddle and pump can be used to propel a small boat. The handle telescopes with a locking nut that may be loosened to allow extension and retraction of the handle. The handle is hollow throughout and a pair of check valves are provided. One check valve opens when the handle is extended and the other opens when the handle is retracted. When one check valve is open, the other is closed. When the distal end of the paddle is placed within a volume of water, extension and retraction of the handle results in a liquid first being sucked into the hollow interior of the handle and then propelled out of the handle.

Claims

1. A combination paddle and pump, comprising: a) a first tube and a second tube, said second tube telescoping within said first tube between a contracted configuration and an extended configuration; b) said first tube including a distal inlet fluidly connected to a first internal passageway in said first tube via a first check valve; c) said second tube including a second internal passageway fluidly connected at a distal end thereof with a proximal end of said first internal passageway in said extended configuration, via a second check valve; d) a proximal end of said second internal passageway including an outlet; e) a paddle attached to said first tube; f) whereby said combination paddle and pump may be used as a paddle by gripping one or both of said first tube and/or said second tube and stroking said first tube and second tube in a body of liquid with said paddle at least partially immersed in said body of liquid; and g) whereby said combination paddle and pump may be used as a pump by dipping said distal inlet within a volume of liquid and reciprocating said second tube with respect to said first tube to pump said liquid through said outlet, reciprocating said second tube away from said first tube causing fluid to enter said inlet, pass through said first check valve and enter said first internal passageway, and reciprocating said second tube toward said first tube causing fluid in said first internal passageway to flow toward said second check valve, pass through said second check valve and enter said second internal passageway, consecutive reciprocations of said second tube causing fluid to exit said outlet.

2. The combination paddle and pump of claim 1, wherein said outlet is located within a handle mounted on said proximal end of said second tube.

3. The combination paddle and pump of claim 2, wherein said handle is T-shaped.

4. The combination paddle and pump of claim 1, further including an adjustable nut that may be adjusted to lock an extent by which said second tube has reciprocated with respect to said first tube.

5. The combination paddle and pump of claim 4, wherein said adjustable nut has internal threads enmeshed with external threads on an external wall of the proximal end of said first tube.

6. The combination paddle and pump of claim 5, wherein a split ring is within said adjustable nut and a split of said split ring narrows as said adjustable nut is rotated to lock against said second tube.

7. The combination paddle and pump of claim 1, wherein said check valves are duckbill check valves.

8. The combination paddle and pump of claim 1, wherein said paddle includes a plurality of rings receiving said first tube.

9. The combination paddle and pump of claim 1, made of plastic.

10. The combination paddle and pump of claim 2, wherein said paddle includes a plurality of rings that receive said first tube.

11. The combination paddle and pump of claim 1, wherein said check valves are duckbill check valves.

12. The combination paddle and pump of claim 7, wherein said handle is T-shaped.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 shows a side exploded view of the present invention.

(2) FIG. 2 shows a side view of the paddle of the present invention.

(3) FIG. 3 shows a side view of the telescoping shafts of the present invention in an extended configuration.

(4) FIG. 4 shows the shafts of the present invention in a compressed or retracted configuration.

(5) FIG. 5 shows a top view of a duckbill check valve used in the present invention.

(6) FIG. 6 shows a side view of the check valve of FIG. 5.

(7) FIG. 7A shows a cross-sectional view along the line 7A-7A of FIG. 3.

(8) FIG. 7B shows the split ring.

SPECIFIC DESCRIPTION OF THE PREFERRED EMBODIMENT

(9) Reference is first made to FIGS. 1-4. As seen, the present invention is generally designated by the reference numeral 10 and is seen to include a first hollow tube 11 having a passageway 12 therethrough and a second hollow tube 13 having a passageway 14 therethrough. The outer diameter of the tube 11 is substantially the same as the inner diameter of the tube 13, in other words, the outer diameter of the passageway 14 so that the tube 11 may telescope within the tube 13. Of course this may be reversed, with the tube 13 telescoping within the tube 11.

(10) As best seen in FIG. 1, at the distal end of the tube 11, a check valve 37 is provided that includes a slot 39. The check valve 37 is known in the art as a duckbill check valve. Similarly, at the distal end of the tube 13, a duckbill check valve 33 is provided which includes a slot 35. With reference to FIGS. 5 and 6, the duckbill check valve 35 is shown including the elongated slot 39 which allows flow in the direction of the arrow A (FIG. 6) but closes when flow of fluid is in the opposite direction. The same structure and operation is true of the check valve 37. Preferably, the check valve 33 is positioned sufficiently far into the tube 13 that the tube 11 does not contact the check valve 33 during operation of the device 10 as a pump. In the preferred embodiment, the check valve 33 is installed close enough to the inlets 23 and 25 to preclude such contact. However, if desired, the check valve 33 can be installed anywhere along the passageway 14 within the tube 13. For example, in some instances, the check valve 33 may be placed a few inches above the distal end of the paddle 15 to allow the tube 13 to taper so that the tube 13 is contoured to the shape of the paddle 15 and, in that instance, the passageway 14 becomes more oblong in shape.

(11) The tube 11 has a proximal T-shaped handle 27 with a passageway 29 fluidly connected to passageway 12 that culminates in an exit port 31. This is seen in FIGS. 1 and 3.

(12) With reference to FIGS. 1 and 2, a paddle 15 is attached to the tube 13. As shown in FIG. 2, a plurality of rings 17 are integrally formed with the paddle 15. Each ring has an opening therethrough 19 which allows the tube 13 to be slid through the aligned openings 19. Thereafter, the tube 13 is fixedly attached to the paddle 15 in a manner well known to those of ordinary skill in the art, such as, for example, by one or more rivets, screws, or other fasteners.

(13) As seen in particular from comparison of FIGS. 3 and 4, the tube 11 may telescope within the tube 13. This telescoping action can occur to the extremes shown in FIGS. 3 and 4, respectively. The end of the tube 13 includes a fitting 21 that has inlets 23 and 25 (FIGS. 1 and 4) that fluidly connect with the passageway 14 within the tube 13 via the check valve 33.

(14) Thus, when the inventive device 10 is in the orientation shown in FIG. 4, and the handle 27 is gripped and the tube 11 is pulled out toward the configuration shown in FIG. 3, the check valve 37 closes and the check valve 33 opens to allow fluid to flow into inlets 23 and 25, to flow past the open check valve 33 and into the chamber formed by the passageway 14. When, thereafter, the handle 27 is gripped and pushed inward to restore the orientation of the inventive device 10 to the configuration shown in FIG. 4, the check valve 33 closes and the check valve 37 opens to allow fluid to travel from the chamber formed by the passageway 14 into the chamber formed by the passageway 12. Successive movements of the tube 11 in and out with respect to the tube 13 cause the fluid to continue to ascend the passageway 12 toward the outlet 31, whereupon the fluid begins to exit the outlet 31.

(15) A nut 40 is provided as shown in FIGS. 1, 3 and 7A in particular, and which is mounted on the tube 13. The nut includes internal threads 43 that enmesh with external threads 41 on the exterior of the proximal end of the tube 13. A split ring 45 including a split 47 is carried within the nut 40 (see FIGS. 7A and 7B) and when the nut 40 is threaded toward a tightened configuration, the split ring 45 hits the annulus 44 and this causes the ring 45 to contract and the split 47 to narrow to tighten the ring 45 about the tube 11 to lock the telescoped position of the tube 11 with respect to the tube 13. In that configuration, particularly with the tube 11 extended with respect to the tube 13 as shown in FIG. 4, the inventive device 10 may be used as a paddle. Of course, the device 10 may be used as a paddle in any telescoped position of the tube 11 with respect to the tube 13. When it is desired to use the inventive device as a pump, the nut 40 must be loosened to allow free reciprocation of the tube 11 within the tube 13 to allow fluid to be pumped from the inlets 23, 25 and through the passageways 14 and 12 and out the outlet 31. The nut 40 operates as a threaded compression fitting that secures the telescoped relationship between the tubes 11 and 13 at a desired length. When the tube 11 is inserted as far as it can go into the tube 13, the device 10 may easily be stored. The nut or compression fitting 40 is released, as explained herein, to allow the device 10 to be used as a pump. The nut 40 may be replaced with any device that enables selective locking of the telescoped position of the tube 11 with respect to the tube 13, and release to allow free telescoping. Examples of alternative devices include clutch locks, split collar locks, snap locks, set knobs, cam locks, and others.

(16) In this way, the inventive device 10 may be used in one configuration as a paddle and in another configuration as a pump. Thus, it becomes unnecessary to provide a separate pump to pump liquid out of a boat or other device.

(17) If desired, a hose may be connected to the outlet 31, and hoses can be connected to the inlets 23 and 25. Of course, such hoses are an accessory and are optional and often unneeded. The invention may be made of any desired material including plastic, wood, metal or any combination of such materials.

(18) One use of the present invention is to enable one to pump water out of the pontoons of a seaplane. In operating a seaplane, one required pre-flight procedure is to inspect the hollow compartments of the pontoons to ensure they are free from any water accumulation. Typically, such pontoons have as many as 12 separate compartments. As is known, any water that enters the compartments of these pontoons can adversely impact, not only buoyancy, but also the performance of the seaplane in flight due to accumulation of weight from the water. Additionally, accumulation of water in the pontoons in an uneven manner can impact the attitude of the seaplane in flight. The present invention may be used to pump water out of the compartments of seaplane pontoons either with or without adding one or more tubes to the inlets 23, 25. Applicant also notes that when a seaplane has landed and its engine is not operating, the inventive device 10 may be used to paddle the seaplane toward a dock or shoreline.

(19) As such, an invention has been disclosed in terms of a preferred embodiment thereof which fulfills each and every one of the objects of the invention as set forth hereinabove, and provides a new and useful improved combination paddle and pump of great novelty and utility.

(20) Of course, various changes, modifications and alterations in the teachings of the present invention may be contemplated by those skilled in the art without departing from the intended spirit and scope thereof.

(21) As such, it is intended that the present invention only be limited by the terms of the appended claims.