Thrust detecting device of a linear actuator

Details Thrust detecting device of a linear actuator Thrust detecting device of a linear actuator

1995-12-08

1998-06-02

Gellner, Michael L.

Electricity: circuit makers and breakers

Retarded

Chain or flexible drive

200330, 200 47, H01H 1318, H01H 316

Patent

active

057603570

ABSTRACT:
A device for detecting a change in the thrust load acting on the actuating rod of a linear actuator. The thrust detecting device includes a pinion which converts and enlarges an axial linear displacement of a rotating drive screw shaft caused by a change in the load on an actuating rod driven by the screw shaft into an angular displacement of a vertical shaft of the pinion. A circular scale plate is attached to the vertical shaft of the pinion and serves to indicate a preset value for the load change to be detected. A pair of striker plates each having a pointer effective to select a preset value on the circular scale plate and a striker effective to activate a corresponding limit switch are attached to the circular scale plate.

REFERENCES:
patent: 4307799 (1981-12-01), Zouzoulas
patent: 4428249 (1984-01-01), Henk
patent: 4679451 (1987-07-01), Nakamura
patent: 4712441 (1987-12-01), Abraham
patent: 4727762 (1988-03-01), Hayashi
patent: 4763219 (1988-08-01), Nakamura
patent: 4910419 (1990-03-01), Hayashi et al.
patent: 5564677 (1996-10-01), Levy et al.
patent: 5586646 (1996-12-01), Bridgeman et al.

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