Utility pump

Details Utility pump Utility pump

2007-05-14

2010-06-01

Leslie, Michael (Department: 3745)

Expansible chamber devices

With guide or seal on cylinder end portion for piston or...

C092S163000

Reexamination Certificate

active

07726231

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.

REFERENCES:
patent: 2915986 (1959-12-01), Sisson
patent: 3006282 (1961-10-01), Sisson
patent: 3124080 (1964-03-01), Sisson
patent: 3669575 (1972-06-01), Beckerer
patent: 4166523 (1979-09-01), Fujii et al.
patent: 4301826 (1981-11-01), Beckerer
patent: 4850826 (1989-07-01), Detlefsen

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