Heavy duty lifting devices

Details Heavy duty lifting devices Heavy duty lifting devices

1977-07-21

1978-01-17

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Method or apparatus for placement of conductive wire

Conduit snakes

B66F 728

Patent

active

040688267

ABSTRACT:
Improvements in heavy duty hydraulic jacks; heavy duty hydraulic jack sleeves which are provided with a plurality of engagement positions for the hydraulic piston rod operative to permit a greater extension of the load carrying sleeve with respect to the base of the jack than the throw of the hydraulic cylinder.

REFERENCES:
patent: 1292823 (1919-01-01), Livesay
patent: 1505443 (1924-08-01), Stone
patent: 2314589 (1943-03-01), Mandl
patent: 2852229 (1958-09-01), Gross

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