Dual piston reciprocating vacuum pump

Details Dual piston reciprocating vacuum pump Dual piston reciprocating vacuum pump

1991-04-26

1993-10-12

Bertsch, Richard A.

Pumps

Expansible chamber type

Plural pumping chambers

417454, F04B 2104

Patent

active

052520455

ABSTRACT:
A reciprocating vacuum pump characterized in that each part to be lubricated of a crank moving portion and piston moving portions is made oilless, two pistons in the piston moving portions being formed so that their load working lines are aligned, a suction exhaust valve being provided on each of the two pistons. This pump may have a multistage structure in which two pistons extend in a horizontally opposed state. The reciprocating vacuum pump thus constructed is small in size and light in weight, and is substantially free from vibration.

REFERENCES:
patent: 13559 (1855-09-01), Yampert
patent: 519383 (1894-05-01), Flood
patent: 591137 (1897-10-01), Miles
patent: 3871663 (1974-06-01), Zehner
patent: 4008012 (1977-02-01), Page
patent: 4297976 (1981-11-01), Bruni et al.
patent: 4900233 (1990-02-01), Ripley
patent: 4954047 (1990-09-01), Okuyama et al.
patent: 4972764 (1990-11-01), Ohya et al.
patent: 5049038 (1991-09-01), Searle

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