Richard G Davenport

US Patent:

41879368, Feb 12, 1980

Filed:

Jun 23, 1978

Appl. No.:

5/918233

Inventors:

Richard G. Davenport - Lowpoint IL

Assignee:

Caterpillar Tractor Co. - Peoria IL

International Classification:

F16D 1104

US Classification:

192 21

Abstract:

A winch assembly (11) comprises a rotary input shaft (15) connected to a pair of first and second gears (21,22) for rotating the gears in opposite directions. First and second friction clutches (23,24) are adapted to selectively connect a rotary output shaft (20) with the first and second gears, respectively, for establishing a drive connection from the input shaft to the output shaft during the reel-out (RO) and reel-in (RI) modes of operation of the winch assembly. An overrunning one-way clutch (33) is interconnected between the first and second gears for normally permitting the gears to rotate in opposite directions, but will lock-up when a torque load imposed on the output shaft during the reel-in mode of operation exceeds the input torque to the winch assembly by the input shaft.

US Patent:

47461004, May 24, 1988

Filed:

Dec 24, 1986

Appl. No.:

6/946256

Inventors:

Richard G. Davenport - Metamora IL
Duane R. Smith - Oswego IL
R. Paul Cobb - Washington IL

Assignee:

Caterpillar Inc. - Peoria IL

International Classification:

B66D 526
F16D 6514

US Classification:

254379

Abstract:

In order to overcome the disadvantage of overspinning of a winch drum when a disconnect device adjacent the drum is disengaged, a drag brake apparatus is provided for limitedly restricting the rotation of the drum when an actuator having a braking element is continually urged against the drum by a spring. A control mechanism includes a control lever assembly movable to operate a hydraulic valve assembly for the primary control of the winch drum, and movable to operate an associated valve for controllably directing pressurized fluid to the actuator for supplementing the spring force. Thus, a first drag brake mode can be attained for substantially freespool operation of the drum, and a second drag brake mode can be attained for controlled load dropping operation of the drum.