Load brake

Details Load brake Load brake

B - Operations, Transporting

60

T

188/130, 188/4

B60T 7/12 (2006.01) B66D 5/22 (2006.01) F16D 59/00 (2006.01)

Patent

CA 1137428

LOAD BRAKE Abstract of the Disclosure A load brake for connection between a reversible hoist motor and a cable drum comprises a non-rotatable annular brake member having axially opposite friction surfaces, and coaxial annular first and second rotatable brake members at opposite sides of the non-rotatable brake member. The first rotatable brake member is constrained to rotate with the cable drum and is thus load-biased for rotation in a lowering direction. A rotation translating connection between the rotatable brake members, comprising elongated tension links having swivel connections to them and inclined to their axis, converges them towards clampwise engagement with the non-rotatable brake member in consequence of rotation of the first rotatable brake member in the lowering direction relative to the second rotatable brake member and permits divergence of the rotatable brake members upon their opposite relative rotation. A driver connected with the motor has a lost motion connection with each rotatable brake member whereby it applies substantial driving torque to the first rotatable brake member only in the load-raising direction while the second rotatable brake member maintains light frictional drag on the fixed brake member, and whereby it applies substantial driving torque to the second rotatable brake member only in the lowering direction while load torque tends to maintain the rotatable brake members frictionally engaged with the non-rotatable brake member.

361249

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