Valves and rod assembly

Details Valves and rod assembly Valves and rod assembly

1996-08-01

1998-03-17

Freay, Charles G.

Pumps

Expansible chamber type

Plural pumping chambers

417454, 417523, 417534, 92175, 92255, 137512, F04B 2104

Patent

active

057279306

ABSTRACT:
A hollow through-bolt is threaded internally and externally, at one end, to receive therein a reciprocable, end-threaded rod. A pair of fluid-control valves, centrally bored, are mounted on the through-bolt in spaced apart disposition. The other end of the through-bolt has a shoulder formed thereon for seating one of the valves thereagainst, and the other valve central bore is tapped for threaded engagement with the one end of the through-bolt. A sleeve, slidably engaged with the through-bolt, and interposed between the valves, maintains the one valve positioned against the shoulder.

REFERENCES:
patent: 5011383 (1991-04-01), Bennitt
patent: 5015158 (1991-05-01), Bennitt
patent: 5141413 (1992-08-01), Bennitt

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