Pumps – Expansible chamber type – Oscillating pumping member
Patent
1990-04-11
1991-05-21
Koczo, Michael
Pumps
Expansible chamber type
Oscillating pumping member
92122, F04C 2100
Patent
active
050171062
ABSTRACT:
In pumps for conveying gases and providing a differential pressure between the pump inlet and outlet, a pumping space within the pump is hermetically sealed from the pump drive unit. No oil or grease-lubricated parts are located within the pumping space. Accordingly, the pump can be characterized as completely dry running. The hermetical seal is provided by a hollow or tubular member (5) capable of torsion movement and located between a shaft (1) and a container (6). A drive unit (7) connected to the shaft provides it with an oscillating rotary motion transmitted through the shaft to the container (6). Segmented pistons (8a, 8b) are located on the container and oscillate in the pumping space between stationary parts (10a, 10b) and afford the pumping effect.
REFERENCES:
patent: 3731599 (1973-05-01), Allen
Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
Freay, Jr. Charles
Koczo Michael
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