Double diaphragm pump

Details Double diaphragm pump Double diaphragm pump

1978-09-28

1980-12-30

Freeh, William L.

Pumps

Expansible chamber type

Plural pumping chambers

74 44, 74 50, F04B 2306, F04B 3900, F16H 2114

Patent

active

042420610

ABSTRACT:
A pump having first and second pumping chambers and a double-acting reciprocating piston which partly defines the pumping chambers. The piston is reciprocated by a rotatable drive member which may include an eccentric. The rotatable drive member has a peripheral surface which engages first and second wear members lying on opposite sides of the drive member. Each of the wear members is mounted on the piston for at least limited movement toward and away from the drive member. First and second resilient elements are positioned between the first wear member and the piston and the second wear member and the piston, respectively. The resilient elements resiliently support the wear members to provide a good driving connection between the drive member and the piston.

REFERENCES:
patent: 2348332 (1944-05-01), Craig et al.
patent: 2677966 (1954-05-01), Mueller
patent: 3095824 (1963-07-01), Elfes
patent: 3410477 (1968-11-01), Hartley
patent: 3834840 (1974-09-01), Hartley

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