Pumps – Expansible chamber type
Patent
1974-05-16
1976-03-30
Husar, C. J.
Pumps
Expansible chamber type
92 99, 92103R, 417413, F04B 4504
Patent
active
039471560
ABSTRACT:
A diaphragm pump, especially a vacuum pump, in which a diaphragm of elastomeric material is clamped at its outer peripheral portion against a peripheral portion of a rigid wall which has, radially inwardly of the clamped portion, a concavely curved spherical surface forming with the diaphragm a pumping chamber with which inlet and outlet ports, each provided with a one-way valve, communicate. A central substantially rigid portion of the diaphragm is moved between a suction stroke increasing the volume of the pumping chamber, and a compression stroke. The wall surface and the diaphragm are constructed and arranged relative to each other that the volume of the pumping chamber is reduced substantially to zero at the end of the compression stroke and so as to permit easy sliding movement of portions of the diaphragm and the surface of the wall as the diaphragm approaches the end of the compression stroke.
REFERENCES:
patent: 1711803 (1929-05-01), Munday
patent: 1999675 (1935-04-01), White
patent: 2742785 (1956-04-01), St. Clair
patent: 3000320 (1961-09-01), Ring
patent: 3503307 (1970-03-01), Migdal
patent: 3722506 (1973-03-01), McMillan, Jr.
Husar C. J.
Smith Leonard
Striker Michael J.
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