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Class Information
Number: 254/310
Name: Implements or apparatus for applying pushing or pulling force > Apparatus for hauling or hoisting load, including driven device which contacts and pulls on cable > Device includes rotatably driven, cable contacting drum > Plural drums or drum with plural distinct sections > Having common drive source or mechanically interlinked drive trains > Including intermeshing gears in drive > With means for preventing or retarding rotation of one or more drums in at least one direction
Description: Apparatus provided with means, (e.g., a shiftable lock, friction brake) for either preventing movement of one or more of the drums about their axis in at least one of their directions of rotation or for slowing down the rotational speed of one or more of the drums in at least one direction of rotation.

Patents under this class:

Patent Number Title Of Patent Date Issued
7967237 Method and apparatus for fast deploying and retrieving of towed bodies Jun. 28, 2011
7564709 Method and system for utilizing DRAM components in a system-on-chip Jul. 21, 2009
5407398 Dual drum drive unit Apr. 18, 1995
4667933 Gear transmission for a winch May. 26, 1987
4496032 Brake unit Jan. 29, 1985
4447044 Clutching and braking control for hydraulically driven crane winches May. 8, 1984
4389799 Scrub crusher Jun. 28, 1983
4324387 Power delivery system having a pressure modulated hydrodynamic retarder for controlling a load Apr. 13, 1982
4257578 Oil well service rig Mar. 24, 1981
4216942 Double-drum winch Aug. 12, 1980
4204664 Winch mechanism for crane May. 27, 1980
4073476 Overhead crane with redundant safety features Feb. 14, 1978
4070981 Mooring system for floating drilling vessels Jan. 31, 1978
4057219 Counterpoising load support apparatus and method Nov. 8, 1977
3961771 Mechanical guy cable control device Jun. 8, 1976

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