Hydraulic machine

Rotary expansible chamber devices – Trapped fluid relief – With tooth modification

Reexamination Certificate

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Details

C418S061300

Reexamination Certificate

active

07407374

ABSTRACT:
The invention concerns a hydraulic machine with a toothed set comprising a toothed ring with an inner toothing, whose circumferential surface extends in parallel with its axis, and a gear wheel (3) with an outer toothing, whose circumferential surface (24) extends in parallel with its axis, at least one tooth flank having an edge as an axial end of a section, which is located between the circumferential surface and a surface directed radially inwards. It is endeavored to reduce the wear. For this purpose it is ensured that in the radial direction an edge (22, 23) ends so as to be offset inwards in relation to the circumferential surface (24).

REFERENCES:
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patent: 6126424 (2000-10-01), Wenker et al.
patent: 2005/0180873 (2005-08-01), Hansen et al.
patent: 1 0209 672 (1956-10-01), None
patent: 0 959 248 (1999-05-01), None
Eugene A. Avallone and Theodore Baumeister III, Marks' Standard Handbook for Mechanical Engineers—10th Edition, Copyright 1996, Publisher: McGraw-Hill, pp. 5-5 to 5-8.

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