Power plants – Pressure fluid source and motor – Pulsator
Patent
1974-09-17
1976-03-30
Schwadron, Martin P.
Power plants
Pressure fluid source and motor
Pulsator
60582, 91434, F01K 1700
Patent
active
039465640
ABSTRACT:
An oil-hydraulic servo-motor, usable with an automotive brake, including a control piston slidably extending through the rear end wall of a power cylinder in aligned opposite relation to an output piston therein and forming together with the cylinder end wall a spool-type control valve which is operable to energize and de-energize the power cylinder. The control piston is axially movable normally within definite limits under the operator's input, and abutment means provided to limit the extent of advancing movement of the control piston is rendered inoperable automatically upon failure of an associated oil pressure circuitry to enable the control piston to drive the output piston directly under the operator's input. The oil pressure circuitry may be formed in two independently operable systems. Major features include simplicity of the valving mechansim and hence of the entire structure of the servo-motor and a highly improved reliability in operation.
REFERENCES:
patent: 2880586 (1959-04-01), Lincoln
patent: 2908137 (1959-10-01), Spalding et al.
patent: 3173339 (1965-03-01), Larsen
patent: 3696615 (1972-10-01), Grabill, Jr. et al.
patent: 3815364 (1974-06-01), Belart et al.
Burks, Sr. H.
Nisshin Kogyo Kabushiki Kaisha
Schwadron Martin P.
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