| 摘要 |
<p>A manually operated portable hand pump for pumping fluids, such as water comprising: • a base for holding the hand pump on ground; • a manifold having an inlet, an outlet and an opening, said manifold supported over said base, oa non-return valve disposed on the inlet and another non-return valve on the outlet of the manifold with a seal there between, the non-return valve at the inlet allows ingress of fluid inside the cylinder and the nonreturn valves at the outlet allows egress of the fluid therefrom; • a cylinder with air vents adapted to be received in said opening configured on said manifold and adapted to be in fluid communication with said inlet and said outlet; and • a piston assembly comprising: o a piston rod with a piston plunger integrally formed on a distal end of said piston rod, the piston plunger adapted to be received inside said cylinder, said piston plunger adapted to slide inside said cylinder as said piston rod is manually actuated using a handle disposed at distal end thereof and accessible from outside said cylinder for defining a suction stroke during which fluid is received inside cylinder from said inlet and power stroke during which fluid is pressed between said piston plunger and internal walls of cylinder and manifold and discharged from said outlet; and o at least a pair of gaskets mounted around said piston plunger and adapted to facilitate fluid tight engagement between said piston plunger and internal side walls of said cylinder. Figure 1</p> |
