Priming pump for a circuit subjecting said pump to an outlet...

Details Priming pump for a circuit subjecting said pump to an outlet... Priming pump for a circuit subjecting said pump to an outlet...

2004-08-26

2009-02-03

Freay, Charles G (Department: 3746)

Pumps

Expansible chamber type

Inlet and discharge distributors at opposite ends of tubular...

Reexamination Certificate

active

07484942

ABSTRACT:
The invention provides a priming pump comprising a deformable envelope associated with an inlet endpiece and an outlet endpiece each fitted with a moving valve member, the endpieces being arranged in such a manner that when the valve members are in the closed position, the outlet endpiece presents a leakage rate that is greater than the leakage rate of the inlet endpiece.

REFERENCES:
patent: 723042 (1903-03-01), Schwerin
patent: 1352306 (1920-09-01), Mott
patent: 1965006 (1934-07-01), Scott
patent: 3009459 (1961-11-01), Henning
patent: 3127845 (1964-04-01), Voelcker
patent: 3204857 (1965-09-01), Weller
patent: 3883272 (1975-05-01), Puckett
patent: 4474540 (1984-10-01), Bonastia et al.
patent: 4936298 (1990-06-01), Nishina et al.
patent: 5970935 (1999-10-01), Harvey et al.
patent: 1 364 632 (1964-10-01), None
patent: 2 703 403 (1994-07-01), None

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