Mechanical brake for a hoist and traction machine
AssigneeElephant Chain Block Company Limited
InventorsYoshio Nishi, Haruo Kubota, Yoshio Ueno, Munenobu Honda
Life of this patent
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Abstract
A mechanical brake for a hoist and traction machine, which is provided with brake releasing force control layers at braking surfaces of a driving member opposite to lining plates. Each of the brake releasing force control layers comprising a heat-treated plating layer made of nickel phosphate, nickel chromium or chromium, so that the surface condition of each braking surface of the driving member can be controlled and the surface hardness can be controlled, whereby an initial force for the brake releasing during the lowering of a load or the releasing traction of a load is adapted to be lower.
Claims8
A mechanical brake for a hoist and traction machine, comprising:
- lining plates;
- and
- braking members having braking surfaces disposed adjacent to said lining plates,
- each of said braking surfaces of said braking members having brake releasing force control layers formed thereon, each of said brake releasing force control layers comprising a heat-treated plating layer selected from the group consisting of nickel phosphate, nickel chromium and chromium.
A mechanical brake for a hoist and traction machine, comprising:
- lining plates;
- and
- braking members having braking surfaces disposed adjacent to said lining plates,
- each of said braking surfaces of said braking members having brake releasing force control layers disposed thereon, each of said brake releasing force control layers comprising a heat-treated plating layer selected from the group consisting of nickel phosphate, nickel chromium and chromium.
Dependencies are inferred from the claim text.