192 clutches and power-stop control – Clutches – Operators
Patent
1990-12-24
1991-10-08
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Operators
91361, 13762564, 192109F, 361159, F16D 2514, F15B 1300
Patent
active
050545990
ABSTRACT:
An apparatus is adapted to detect an end-of-fill condition of an actuator having a varying control volume, C. The apparatus includes a solenoid having a coil and an armature. The armature is movable relative to the coil in response to energization of the coil. A control valve delivers a flow of fluid to the actuator. The rate of the fluid flow is responsive to the movement of the armature. An electrical circuit detects a voltage spike across the coil and responsively produces an end-of-fill signal. The voltage spike is generated by an electromotive force produced by the armature in response to the control volume achieving a predetermined end-of-fill pressure.
REFERENCES:
patent: 3295421 (1967-01-01), McCormick
patent: 4135610 (1979-01-01), Chatterjea
patent: 4707789 (1987-11-01), Downs et al.
patent: 4785849 (1988-11-01), Masuda
patent: 4855911 (1989-08-01), Brekkestran et al.
patent: 4871048 (1989-10-01), Chatterjea
patent: 4936167 (1990-06-01), Mehta
patent: 4942787 (1990-07-01), Aoki et al.
patent: 4949264 (1990-08-01), Katayama et al.
K-Atomics Brochure, Komatsu (undated).
Bonck Rodney H.
Caterpillar Inc.
Yee James R.
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