Rotary expansible chamber devices – Grooved abutting cylinder-rotating member end surfaces – Groove communicates with vane slot
Patent
1997-08-05
1999-10-05
Vrablik, John J.
Rotary expansible chamber devices
Grooved abutting cylinder-rotating member end surfaces
Groove communicates with vane slot
418268, 137102, F01C 1344, F01C 2116, G05D 701
Patent
active
059613076
ABSTRACT:
The simple and economical pressure proportioning regulator valve can maintain a constant pressure ratio of the pressure at its inlet (13) to the pressure in its outlet duct (14), especially during negative pressure changes at the inlet (13). The pressure proportioning regulator valve has a valve housing (11) provided with a throughgoing passage (12) having an inlet (13) and an outlet duct (14); a valve gate (22) in the throughgoing passage (12) having a pressing surface (43) acted on by a pressure at the inlet (13) and another pressing surface (44) acted on by a pressure in the outlet duct (14); a device for reducing both pressures while maintaining their pressure ratio including a first control edge (29) arranged on the valve gate (22) between the inlet (13) and the outlet duct (14) and a device for controlling a flow of a pressurized medium between the outlet duct (14) and the return duct (15) including a second control edge (30) provided on the control member (23) of the valve gate (22). This rapidly reacting pressure proportioning regulator valve (10) does not have a valve spring and thus is not subjected to wear and/or fatigue in the course of its life.
REFERENCES:
patent: 2632398 (1953-03-01), Ferris
patent: 3516768 (1970-06-01), Bolz et al.
patent: 4917140 (1990-04-01), King 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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