Internal-gear machine

Details Internal-gear machine Internal-gear machine

1998-02-19

1999-09-14

Herrmann, Allan D.

Rotary expansible chamber devices

With mechanical sealing

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

418170, 74413, F01C 110

Patent

active

059512741

ABSTRACT:
An internal-gear machine comprises a casing with an internally toothed annular gear rotatable therein, an externally toothed pinion engaged with the annular gear and a filling member between the annular gear and the pinion. The filling member is subdivided into two portions by a substantially circumferentially extending separating surface. The filling member portions have respectively mutually oppositely disposed recesses which extend from the separating surface and which each have an inclined surface parallel to the axis of the machine. The inclined surfaces are in a wedge-shaped relationship with each other and a sealing roller is arranged in the wedge-shaped space. The sealing roller is pressed against the inclined surfaces by a hairpin spring operatively disposed between the sealing surface and a support surface. The spring limbs bear against the sealing roller and the support surface while the bent end of the spring projects into a free space in the casing.

REFERENCES:
patent: 3486459 (1969-12-01), Eltze
patent: 4472123 (1984-09-01), Eckerle et al.
patent: 5690481 (1997-11-01), Eckerle

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