Safety brake mechanism for a winding drum and method for...

Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum

Reexamination Certificate

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Details

C254S376000

Reexamination Certificate

active

11217880

ABSTRACT:
The invention concerns a safety brake mechanism for the winding drum (8) of a hoisting machine that can be driven via a motor (4) with lifting gearbox (3), which is substantially braked to a standstill without jerking when the lowering speed is excessive by a brake ring (12) that revolves concentrically with the winding drum (8) and is frictionally joined to the latter, when the brake ring (12) lying against a cylindrical brake surface (23) of the hoisting machine is locked. In order to allow for the grinding and adjusting of the necessary braking moment in the disconnected condition of the winding drum prior to the assembly of the complete lifting mechanism with low expenditure of material and cost, the brake surface (23) for the brake ring (12) may be provided on its outer circumference with a rigid coupling (10) that concentrically connects a lifting gearbox (3) and a winding drum (8), to which the lifting gearbox (3) and winding drum (8) are removably connected.

REFERENCES:
patent: 4489919 (1984-12-01), Ostrobrod
patent: 4493479 (1985-01-01), Clark
patent: 4520998 (1985-06-01), Flaig
patent: 5201821 (1993-04-01), Ericson et al.
patent: 5344121 (1994-09-01), Baziuk
patent: 5458318 (1995-10-01), Jussila
patent: 5664766 (1997-09-01), Baziuk
patent: 5671912 (1997-09-01), Langford et al.
patent: 5860635 (1999-01-01), Morfitt et al.
patent: 6695292 (2004-02-01), Nam
patent: 7080825 (2006-07-01), George et al.
patent: 19633836 (1998-03-01), None

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