Air pressure-actuated double-acting diaphragm pump with means to

Details Air pressure-actuated double-acting diaphragm pump with means to Air pressure-actuated double-acting diaphragm pump with means to

1975-09-03

1977-04-26

Croyle, Carlton R.

Pumps

Motor driven

Fluid motor

417404, 91304, 91367, 91453, F04B 1700, F04B 3500, F01L 2502, F15B 1316

Patent

active

040198383

ABSTRACT:
A two-stage pump which includes a pair of reciprocating pump members operating in opposed pump chambers and a connecting rod connecting the pump members to cause the pump members to operate in unison. Air under pressure is supplied to the chambers by a spool valve member which operates in a guide sleeve. The spool valve includes four outwardly extending portions defining a central pressure slot and a pair of exhaust slots. Ports in the sleeve communicate with the pump chambers. The spool valve is moved by pressure in pressure chambers at opposite ends of the sleeve member. The sleeve is mounted in a bore, and metering air passageways are formed between the valve sleeve and the bore and connecting the pressure chambers with the exhaust slots.

REFERENCES:
patent: 1741120 (1929-12-01), Tandberg
patent: 2239727 (1941-04-01), Mayer
patent: 2586249 (1952-02-01), Paille
patent: 2625886 (1953-01-01), Browne
patent: 3130684 (1964-04-01), Firth et al.
patent: 3548716 (1970-12-01), Ray
patent: 3741689 (1973-06-01), Rupp
patent: 3838946 (1974-10-01), Schall

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