Rotary expansible chamber devices – Grooved abutting cylinder-rotating member end surfaces – Groove communicates with vane slot
Patent
1997-08-07
2000-01-18
Vrablik, John J.
Rotary expansible chamber devices
Grooved abutting cylinder-rotating member end surfaces
Groove communicates with vane slot
418268, F01C 1344, F01C 2116
Patent
active
060152788
ABSTRACT:
In the vane machine of the invention the wear-causing pressure differences at the opposite ends (16,18) of the vanes (15) are at least partially reduced, especially during the reversing stages of the vanes (15). A compression gate valve (35) without a valve spring integrated in the vane machine is provided for this. It provides a constant pressure ratio of the pressure with which a vane is pressed against the lift ring during a reversing stage to the system pressure. By controlling the pressure ratio in this way an undue amount of friction of the vanes (15) on the lift ring (20) is avoided, also at high system pressure.
REFERENCES:
patent: 2641195 (1953-06-01), Ferris
patent: 3516768 (1970-06-01), Bolz et al.
patent: 4722652 (1988-02-01), Jingin et al.
Key Al
Lemke Gregory
Meinke Charles W.
Schilling Ronald J.
Robert & Bosch GmbH
Striker Michael J.
Vrablik John J.
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