Releasable clamping assembly for use with hydraulic jacking appa

Details Releasable clamping assembly for use with hydraulic jacking appa Releasable clamping assembly for use with hydraulic jacking appa

1981-10-14

1986-02-25

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Clutch actuated

B66F 100

Patent

active

045724814

ABSTRACT:
A hydraulic apparatus is shown for moving a heavy load along an I-beam shaped structural member comprising a releasable clamping assembly and a double acting hydraulic jacking cylinder. The releasable clamping assembly includes a ramp plate, a pair of ramp mating members and a pair of jaw members having a cavity defined by opposed sloped walls having a bearing surface which cooperate with a ramp plate and ramp mating members causing the gripping surface of the ramp plate and ramp mating members to engage the flange of an I-beam. The releasable clamping assembly transmits a thrust load from a jacking cylinder thrust to the jaw member which reacts to apply a clamping force to the ramp plate and ramp mating members such that a thrust load away from direction of load travel will result in the ramp plate and the pair of ramp mating plates being urged towards each other to grip the flanged surface of the I-beam and arrest the motion of the jacking cylinder relative to the I-beam. The releasable clamping assembly is responsive to a very small thrust load in the direction of travel to move the ramp plate and ramp mating members apart from one another allowing the jacking cylinder and clamping assembly to be repositioned. Gripping lugs extending from the jacking cylinder to the flange of the I-beam transmit part of the rotational movement directly to the I-beam to permit the use of a small size jacking cylinder.

REFERENCES:
patent: 2444304 (1948-06-01), Miller
patent: 3373971 (1968-03-01), Chambers et al.
patent: 3441265 (1969-04-01), Albert
patent: 4030699 (1977-06-01), Heimke

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