Motors: expansible chamber type – With motive fluid valve – Electrically operated
Patent
1991-12-23
1993-06-01
Brown, David H.
Motors: expansible chamber type
With motive fluid valve
Electrically operated
91361, 13762565, F15B 13044, F15B 1316
Patent
active
H00011916
ABSTRACT:
An apparatus is provided for controllably positioning a movable element within a hydraulic motor in response to a flow request signal. An electric circuit receives the flow request signal and responsively produces an energization signal. An electromagnetic actuator has a core, and a coil with a plurality of windings wound as a helix around the core. The coil is adapted to receive the energization signal and responsively produce a magnetic force proportional to the magnitude of the energization signal forcing the core to move bidirectionally relative to the coil. A mechanical coupling has one end connected to and movable with the core. A directional valve includes a spool connected to the other end of the mechanical coupling. The directional valve precisely meters pressurized fluid to the motor causing the movable element to move in response to the movement of the core.
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Hutchison Eric A.
Lukich Michael S.
Brown David H.
Caterpillar Inc.
Masterson David M.
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