Utility pump
AssigneeThe Patent Store LLC
InventorsAaron L. Eaton, Lloyd Herbert King, Jr.
Life of this patent
Estimating the term…
Abstract
A lightweight, inexpensive, corrosion proof, utility pump having a flexible member forming a sliding interference fit with a pump rod with the flexible member confined between a pump rod bushing and an end cap to prevent leakage and a method of converting an inexpensive utility pump from a leaking condition to a non leaking condition without having to modify the existing components of the utility pump.
Claims20
An inexpensive plastic utility pump comprising:
- a pipe having a first end for drawing water therein;
- a pump rod slideable in said pipe;
- a bushing located in a second end of the pipe with the bushing providing a guide for slideable displacement of the pump rod therethrough;
- an end cap having an integral sealing member forming an interference slide fit with the pump rod as the pump rod slides back and forth therethrough;
- and
- a flexible member located between said bushing and said end cap with said flexible member forming a further interference slide fit with said push rod while being retained between the end cap and the bushing to prevent leakage through the end cap of the utility pump.
The method of converting a plastic utility hand pump from a leaking condition to a non-leaking condition without altering components of the utility hand comprising;
- placing a flexible member in an interference slide fit around a utility pump rod;
- and
- axially restraining the flexible member between a pump rod bushing and an end cap.
The method of converting a plastic utility hand pump from a leaking condition to a non-leaking condition without altering components of the utility hand comprising;
- placing a flexible member in an interference slide fit around a utility pump rod;
- and restraining the flexible member from sliding along the pump rod with a pump rod bushing and an end cap.
An irrigation utility pump comprising:
- a plastic pipe;
- a pump rod;
- a piston slideable in the plastic pipe;
- a bushing forming a pump rod guide located in one end of the plastic pipe;
- a flexible end cap extending over the bushing with the end cap having a sealing surface that sliding engages the pump rod with the improvement comprising;
- a flexible member confined between the flexible end cap and the pump rod bushing with the flexible member forming an interference slide fit with the pump rod to prevent leakage through the end cap.
Dependencies are inferred from the claim text.