Screw jack

Details Screw jack Screw jack

1985-05-23

1986-09-02

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Screw

Telescoping screws

B66F 310

Patent

active

046091793

ABSTRACT:
A screw jack which comprises a motor mounted in a housing which also houses a vertically mounted lifting screw assembly, a transmission unit for transmitting the output motion of the motor to the lifting screw assembly, and a limit switch means which is actuated by the screw assembly. The limit switch means includes an upper limit switch and a lower limit switch provided where the upward movement and the downward movement of the screw assembly are intended to be ended.

REFERENCES:
patent: 1414683 (1922-05-01), Anglada
patent: 2857226 (1958-10-01), Schenk
patent: 3149822 (1964-09-01), Hadek

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