Method of producing a gear for a ring pump

Details Method of producing a gear for a ring pump Method of producing a gear for a ring pump

1991-08-27

1992-06-16

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

419 7, 228107, G22F 700

Patent

active

051223350

ABSTRACT:
A suction controlled gear ring pump effects a continuous decrease of the vacuum occurring in the feed cells of the pump at higher rotational speeds due to the long movement path of the feed cells from the end of the suction region to the beginning of the discharge opening and the thereby occurring diminution of the feed cells. In order to prevent squeeze oil when working at a lower rotating speed, the feed cells positioned successively in the feed direction are connected between the teeth respectively with the neighboring feed cells by overflow channels extending through the gear teeth, check valves in said overflow channels preventing a flow against the feed direction.

REFERENCES:
patent: 4419413 (1983-12-01), Ebihara
patent: 4472350 (1984-09-01), Urano

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