Improved hand pump assembly

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.

1 . 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.   
     
     
         2 . The hand pump for pumping liquids of  claim 1  further comprising a lift rod having a first end and second end;
 said lift rod first end connected to said piston; 
 a reciprocating pump handle pivotally connected to said housing; and 
 said lift rod second end connected to said handle. 
 
     
     
         3 . The hand pump for pumping liquids of  claim 2  further comprising a stop, said stop formed about said lift rod between said first end and said second end; and
 said stop located within said housing interior cavity and beneath said top plate. 
 
     
     
         4 . The hand pump for pumping liquids of  claim 1  further comprising a pour spout, said pour spout affixed to an exterior surface of said housing adjacent said liquid outlet. 
     
     
         5 . The hand pump for pumping liquids of  claim 1  further comprising a trough support, said trough support attached to said base plate. 
     
     
         6 . The hand pump for pumping liquids of  claim 5  wherein said trough support has an adjustable height. 
     
     
         7 . The hand pump for pumping liquids of  claim 5  further comprising an elongated trough, said elongated trough attached to said trough support. 
     
     
         8 . The hand pump for pumping liquids of  claim 1  further comprising a support plate, said base plate being mounted to said support plate;
 said support plate being positioned over a liquid basin; and 
 a pipe having a first end and a second end, said first end coupled to said check valve and said second end extending into said basin. 
 
     
     
         9 . The hand pump for pumping liquids of  claim 7   further comprising a support plate, said base plate being mounted to said support plate;   said support plate being positioned over a liquid basin; and   a pipe having a first end and a second end, said first end coupled to said check valve and said second end extending into said basin.   
     
     
         10 . 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.   
     
     
         11 . 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.