Improved hand pump assembly
OwnerAnthony E Davisinventor
Life of this patent
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Abstract
An improved hand pump for recreational and utilitarian activities, comprising a stainless steel construction for corrosion resistance, a handle with a PVC grip, a piston assembly having a vertically positionable x-ring seal, to allow and prevent fluid flow through the hand pump, a removable top plate for ease of maintenance, bearings and bushings at rotation points in the hand pump for ease of movement of a handle and a piston assembly of the hand pump and increased longevity of the hand pumps, and a stop limiting movement of the pump handle during operation.
Claims11
A hand pump for pumping liquids, the pump comprising:
- a housing have opposed first and second housing ends and defining an interior cavity there between;
- a top plate affixed to the first housing end and a base plate affixed to the second housing end;
- a piston located within the housing interior cavity, said piston having a top surface and an outer circumference;
- a groove formed in said piston outer circumference and at least one passageway being formed from said groove to said piston upper surface;
- an x-ring seal positioned within said groove;
- said x-ring seal having a height that is less than a height of said groove such that said x-ring seal is movable in said groove from a first position whereby said at least one passage is blocked by said x-ring seal to a second position whereby said at least one passage is not blocked by said x-ring seal;
- a liquid inlet formed in said base plate;
- a check valve attached to said liquid inlet on a side of said base plate opposite said housing;
- and
- a liquid outlet formed in said housing proximal to said top plate.
A hand pump for pumping liquids, said hand pump comprising:
- a housing have opposed first and second housing ends and defining an interior cavity;
- a piston located within said housing interior cavity, said piston having a top surface and an outer circumference;
- a groove formed in said piston outer circumference and at least one passageway being formed from said groove to said upper surface;
- an x-ring seal positioned within said groove;
- said x-ring seal having a height that is less than a height of said groove such that said x-ring seal is movable in said groove from a first position whereby said at least one passage is blocked by said x-ring seal to a second position whereby said at least one passage is not blocked by said x-ring seal;
- a liquid outlet formed in said housing proximal to said first housing end;
- and
- a check valve attached to said housing, said check valve located proximal to and beneath said second housing end.
A piston assembly for a hand pump, said piston assembly comprising:
- a piston having a top surface and a circumference;
- a groove being formed about said circumference;
- at least one passageway formed from said groove to said top surface;
- an x-ring seal being located in said groove;
- and
- said x-ring seal having a height that is less than a height of said groove whereby said x-ring seal can move in said groove from a first position where said x-ring seal is blocking said at least one passageway to a second position whereby said x-ring seal is not blocking said at least one passageway.
Dependencies are inferred from the claim text.