Motors: expansible chamber type – With signal – indicator or inspection means
Patent
1980-10-14
1984-04-17
Hershkovitz, Abraham
Motors: expansible chamber type
With signal, indicator or inspection means
91 36, 92 8, 92 133, 92 136, F01B 2526
Patent
active
044427549
ABSTRACT:
In this fluid powered positioning system, a sliding assembly includes a slide plate that moves linearly with respect to a frame. A plurality of "working" linear cylinder actuators are mounted to the frame. Each includes a piston and a rod which extends through an opening in the slide plate and terminates at a stop flange. A set of adjustable stop members are mounted to the frame and each is positioned to limit the travel of a respective actuator rod. Appropriate control means applies to a selectable one of the actuators a pressurized fluid, that causes the piston and rod to be moved in a first direction until it is stopped by the associated stop member. In this movement, the stop flange can pull the slide plate to the new location. A "balance" linear actuator cylinder includes a ram that exerts a continuous force in the opposite direction against the slide plate. This "balance" actuator damps and effectively prevents overshoot of the slide plate as it is positioned to each new location. An integral feedback system provides an electrical signal which indicates that positioning has been accomplished and that the slide plate is at the new location.
REFERENCES:
patent: 2441264 (1948-05-01), Eaton
patent: 2473507 (1949-06-01), Bullard
patent: 2752989 (1956-07-01), Jenkins, Jr.
patent: 2980062 (1961-04-01), Ohle
patent: 3090360 (1963-05-01), Bennett
patent: 3148595 (1964-09-01), Looney
patent: 3303755 (1967-02-01), Linker
patent: 4111311 (1978-09-01), Hirama
patent: 4225110 (1980-09-01), Akkerman
patent: 4311086 (1982-01-01), Schoen
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