Internal-gear machine with fluid opening in non-bearing tooth fl

Details Internal-gear machine with fluid opening in non-bearing tooth fl Internal-gear machine with fluid opening in non-bearing tooth fl

1988-11-16

1990-06-19

Vrablik, John J.

Rotary expansible chamber devices

Moving cylinder

Rotating

418190, F01C 110, F04C 210

Patent

active

049349139

ABSTRACT:
An internal-gear machine such as a pump comprises an internally toothed annular gear and an externally toothed pinion which meshes with the internal teeth of the annular gear over a portion of the periphery thereof, an arcuate filling member being disposed between the annular gear and the pinion. The annular gear has openings which connect the outside periphery of the annular gear with the inward side thereof in the region of the gaps between the teeth. Each opening is set into the non-bearing flank of the respective tooth which delimits on one side the gap between a pair of teeth, to such an extent that at the same time each opening forms a communication between the root of the respective tooth and the tip of the tooth.

REFERENCES:
patent: 751196 (1904-02-01), Nielsen
patent: 1496737 (1924-06-01), Petersen
patent: 3448615 (1969-06-01), Schneider, Jr.
patent: 3545898 (1970-12-01), Bobst
patent: 3981646 (1976-09-01), Bottoms
patent: 4233005 (1980-11-01), Bottoms et al.

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