Gear pumps and motors

Details Gear pumps and motors Gear pumps and motors

1979-04-13

1981-05-12

Smith, Leonard E.

Rotary expansible chamber devices

With mechanical sealing

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

F04C 1500

Patent

active

042669154

ABSTRACT:
The disclosure relates to improvements in pumps and motors of the gear type. The gear elements are arranged within the pump or motor housing so that the ends or the tips of the teeth are spaced out of fluid sealing relationship and not pressed into the surrounding chamber wall on the low pressure side of the housing. According to the disclosure, sealing members of limited circumferential extent are provided in the housing at the high pressure side of the gears for the purpose of providing a fluid seal between the tips of the teeth in a limited region adjacent the opening in the housing which is at higher pressure. The sealing members disclosed are a pair of separate shoes located adjacent the high pressure opening. The sole support for the shoes is provided by the side pressure plates.

REFERENCES:
patent: 2742862 (1956-04-01), Banker
patent: 2996999 (1961-08-01), Trautman
patent: 3437048 (1969-04-01), Noell et al.
patent: 3915604 (1975-10-01), Kitta et al.
patent: 3986800 (1976-10-01), Dworak et al.

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