Draw works

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

C254S379000

Reexamination Certificate

active

10506032

ABSTRACT:
In the drawworks for lowering and withdrawing a load, in particular a drilling or a drilling plugging device, in particular for use on floating drilling platforms, which drawworks has at least one brake arrangement for braking and holding the load, an emergency brake device is provided for producing an additional braking force.

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patent: 4337926 (1982-07-01), Dehaan
patent: 4434971 (1984-03-01), Cordrey
patent: 4696377 (1987-09-01), Richardson et al.
patent: 4746100 (1988-05-01), Davenport et al.
patent: 5342020 (1994-08-01), Stone
patent: 5425435 (1995-06-01), Gregory
patent: 1137277 (1961-01-01), None
patent: 0708226 (1996-04-01), None
patent: 842435 (1957-10-01), None
patent: 0164573 (2001-09-01), None

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