Pumps – Diverse pumps – Moving partition or cylinder of rotary pump forms or...
Patent
1995-10-17
1998-04-14
Vrablik, John J.
Pumps
Diverse pumps
Moving partition or cylinder of rotary pump forms or...
417220, 418 30, 418133, F04B 2310, F04C 2344, F04C 1504
Patent
active
057385009
ABSTRACT:
A variable displacement vane pump comprising a durable rotor member having journal ends at each side of a larger diameter central vane section comprising vane slots having well areas which slidably-engage a mating vane element. The present vane pump comprises an outer cylindrical cam enclosure or spacer loaded against ring seal elements to support the faces of the seal elements closely spaced from the cam faces and reduce the actuation force required for adjustment of the displacement capacity of the pump. The cam faces include a biased segment seal in the high pressure discharge arc area. The seal elements include first fuel inlet passages in the inlet arc segment thereof, and fuel discharge passages in the discharge arc segment thereof, both of said passages being open to the vane slot extensions and to the cam chamber for the continuous supply and pressure discharge of fuel.
REFERENCES:
patent: 3523746 (1970-08-01), Dadian et al.
patent: 4551079 (1985-11-01), Kain
patent: 5178525 (1993-01-01), Murota
patent: 5484271 (1996-01-01), Stich
Books Martin Thomas
Sundberg Jack G.
Zagranski Raymond D.
Coltec Industries Inc.
Reiter, Esq. Howard S.
Vrablik John J.
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