Hydraulic and earth engineering – Miscellaneous
Patent
1979-05-03
1981-03-31
Corbin, David H.
Hydraulic and earth engineering
Miscellaneous
405142, 405282, E02D 1700
Patent
active
042590302
ABSTRACT:
Herein described is an anchor for use in an open earth trench which is adapted for use with equipment performing construction functions within the trench. A cable is attached to a winch on the equipment and to the anchor. The equipment is moved along by the winch. The anchor is comprised of a pair of elongated concave sleeve sections each being hinged together at the bottom of the trench. A plurality of earth engaging blades are disposed on the outer periphery of the sleeve section. The blades are angled in the direction of pull. A pair of top ribs are placed longitudinally along the top of the sleeve sections form a channel for engaging the walls of the trench to prevent upward movement of the anchor. A first arm has one end thereof pivotally mounting to the interior side of one of the sleeve sections. A second arm has a first end pivotally mounted to interior side of the second sleeve section. Each of the arms then extend upwardly at an angle towards each other and the second ends of each arm are pivotally mounted together. As the pivotally connected arms are drawn downwardly toward the bottom of the first and second sleeve section, the sleeves are forced away from each other, causing the plurality of angled blades and the top ribs to engage the earth at the trench. A pulley is disposed on the bottom of one of the sleeve sections and a cable is coupled to an eye connected to the pivot point of the second ends of the arms and engages the pulley. The cable is then coupled to winch on the equipment used to perform the construction within the trench.
REFERENCES:
patent: 1137442 (1915-04-01), Abbott
patent: 1843334 (1932-02-01), McGrath
patent: 2866320 (1958-12-01), Bazzell
patent: 3903707 (1975-09-01), Foik
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