Rotary vane pump with sealing means

Details Rotary vane pump with sealing means Rotary vane pump with sealing means

1976-12-02

1978-10-31

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Seal on cylinder engaging rotary member separates inlet and...

418128, 418129, 418137, 418144, 418263, 418178, F01C 1902, F01C 1908, F01C 2100, F01C 100

Patent

active

041232054

ABSTRACT:
A pump is comprised of a housing within which a rotary piston is rotatably mounted, to define therebetween an annular conveying channel between an inlet port and an outlet port. Annular sealing rings between the piston and housing seal the conveying channel at the periphery of the piston. A stopper extends into the conveying channel in the back flow path, and sealing elements are provided to seal the entire cross section of the back flow paths. Radially movable slides on the piston are resiliently urged into the conveying channel, the radial position thereof being controlled by a cam surface in the housing. The slides are urged radially outwardly by springs, and seals are provided on the piston for sealingly guiding the piston in the radial direction.

REFERENCES:
patent: 2338112 (1944-01-01), Hell
patent: 2619913 (1952-12-01), Longenecker
patent: 2850215 (1958-09-01), Stokes
patent: 3001482 (1961-09-01), Osborn
patent: 3294454 (1966-12-01), Foerster et al.

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