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
2008-07-29
2008-07-29
Langdon, Evan H (Department: 3654)
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
active
07404544
ABSTRACT:
A torque limiting clutch includes a drive shaft having central rotational axis, a disk-shaped spring member secured to the drive shaft for rotation therewith, and a plate adjacent the spring member and having a plurality of grooves receiving bosses of the spring member. The spring member has a plurality bosses formed at an outer edge of the spring member that each form a generally V-shaped engagement surface. The grooves each form a generally V-shaped engagement surface engaging the bosses. A retaining clip retains the plate relative to the spring member to obtain a predetermined spring pretension. Engagement of the bosses with the grooves causes rotation of the plate upon rotation of the drive shaft when below a predetermined torque limit and deflection of the bosses out of the grooves prevents rotation of the plate upon rotation of the drive shaft when above the predetermine torque.
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Kingsbury Bruce Daniel
McDonald John Joseph
Dura Global Technologies Inc.
Langdon Evan H
Mescher Rick M.
Porter Wright Morris & Arthur
Watson Dean B.
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