Pumps – Expansible chamber type – Valved piston
Patent
1994-04-15
1995-03-28
Bertsch, Richard A.
Pumps
Expansible chamber type
Valved piston
222384, 222153, F04B 5312, B67D 542
Patent
active
054011485
ABSTRACT:
A manually operated reciprocating liquid pump employs both a priming valve and a check valve where the priming valve performs the dual functions of priming the pump and sealing the pump to prevent inadvertent leakage of liquid through the pump when it is not in an upright orientation.
REFERENCES:
patent: 2772116 (1956-11-01), Dobkin
patent: 3257961 (1966-06-01), Schlenker
patent: 4692103 (1987-09-01), Anderson
Foster Donald D.
Nelson Philip L.
Bertsch Richard A.
Contico International Inc.
Korytnyk Peter
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