Double-shaft vacuum pump with synchronization gears

Details Double-shaft vacuum pump with synchronization gears Double-shaft vacuum pump with synchronization gears

1990-02-15

1991-07-30

Koczo, Michael

Rotary expansible chamber devices

Interengaging rotating members

Like rotary members

74462, 184 612, 184 616, F04C 1818, F04C 2902, F04C 2904, F16H 5508

Patent

active

050355902

ABSTRACT:
A double-shaft vacuum pump with pistons (3,4) rotating without contact in the pump chamber (8) and with synchronization gears (16, 17) located in a side chamber (15). In order to dispense with an oil supply in the side chamber the teeth of the synchronization gears (16, 17) are shaped in such a way that contact between the tooth flanks (26) is limited to the immediate vicinity of the pitch circle (29). If any lubrication is needed, it can be supplied by bearing grease suitable for vacuum applications. The side chamber cover (27) is preferably shaped as a "figure-8" to conform to the peripheries of the synchronization gears (16, 17), and a cooling system for the gears may be provided.

REFERENCES:
patent: 1192287 (1916-07-01), Easton
patent: 1194904 (1916-08-01), Wagner
patent: 1506918 (1924-09-01), Fraunhofen
patent: 1852789 (1932-04-01), Peterson
patent: 2519557 (1950-08-01), Flanagan
patent: 2737057 (1956-03-01), Van Dorn et al.
patent: 3121530 (1964-02-01), Lorenz
patent: 3269205 (1966-08-01), Niemann
patent: 3438279 (1969-04-01), Rouverol
patent: 3990539 (1976-11-01), Marit

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