Jack safety device

Details Jack safety device Jack safety device

1985-05-13

1987-01-13

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Hoisting truck

Single throw lever

B60P 148

Patent

active

046359028

ABSTRACT:
Jack safety device, having a rotation key integral with a pressing spring, a hollow-set key lid, and a spanner fitting the spanner onto a hydraulic tank incorporating a camming bearing surface on the spanner so as to move the key into grooves on the hydraulic jack stem in one position of the spanner and lift the key out of the grooves in another position of the spanner.

REFERENCES:
patent: 2611579 (1952-09-01), Guzey et al.
patent: 2845992 (1958-08-01), Cramer
patent: 2909212 (1959-10-01), Scherer
patent: 3047269 (1962-07-01), Renshaw
patent: 3195860 (1965-07-01), Simms
patent: 3647183 (1972-03-01), Rishovd
patent: 4251056 (1981-02-01), Maniglia

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