Power plants – Pressure fluid source and motor – Full range correspondence of position of external...
Patent
1978-05-19
1980-03-25
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Full range correspondence of position of external...
60390, 60391, 60392, 60403, F15B 900
Patent
active
041943619
ABSTRACT:
To permit mechanical override of an electrical command system to control deflection of the swash plate or eccentricity of an axial or radial piston pump, for example upon failure of the electrical control system, a group of valves 5-8 are connected to an electrical control unit 23 and an additional control valve 4, 4' with a manual control lever 18', 30' is provided, the deflection of the swash plate 1 or eccenter ring 28 of the pump being sensed by a position transducer 22 moved by a linkage which includes the manual control lever. In normal operation, the manual control lever is maintained by spring pressure to deactivate the control valve but, under emergency conditions, the manual control lever will operate the first control valve 4, 4' to admit hydraulic control fluid to position the swash plate, or eccenter ring, respectively, the consequent movement of which is fed back through the linkage to the manual control lever.
REFERENCES:
patent: 3212263 (1963-10-01), Hann
patent: 3667225 (1972-06-01), Karman
patent: 4055047 (1977-10-01), Kawasaki
Lixenfeld Manfred
Pahl Arnold
van der Kolk Hans-Jurgen
Geoghegan Edgar W.
Robert & Bosch GmbH
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