Implements or apparatus for applying pushing or pulling force – Vehicle-body lifters
Patent
1978-06-21
1979-10-02
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Vehicle-body lifters
254101, B66F 726
Patent
active
041695810
ABSTRACT:
A stabilizing jack for helping to safely load and unload trailers. The jack consists of component parts which are easily assembled and disassembled. The jack comprises a base having an upwardly opening axially extending tubular socket, a head axially spaced above the base and having a downwardly opening axially extending tubular socket and an elongated axially extending tubular column having opposed end portions received in the sockets of the base and the head. Different lengths of column may be used with the same head and base depending on the particular usage to which the jack is placed. The base is provided with wheels and has a socket adapted to carry a long handle so as to tilt the jack back onto the wheels of the base for easy maneuverability. The head is provided with a pair of hand grips for assisting in the maneuverability of the jack under the trailer. The head includes an internally threaded axially extending bore which carries a vertically movable jack screw assembly, the outer end of which is provided with a load plate mounted for universal movement and engageable with the trailer. A pawl and ratchet mechanism is carried by the jack screw assembly whereby rotation of the jack screw in one direction is effective to raise the jack screw assembly and load plate and is effective upon rotation in the opposite direction to lower the jack screw assembly and the load plate. The head and base are each removably connected to the column by a plurality of removable threaded fasteners which permit replacement, repair and/or modification of the component parts of the stabilizing jack.
REFERENCES:
patent: 1701122 (1929-02-01), Ridgeway
patent: 3074693 (1963-01-01), Shumake
patent: 3314655 (1967-04-01), Steele
patent: 3415490 (1968-12-01), Steele
Equipment Company of America
Watson Robert C.
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