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
2011-01-11
2011-01-11
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
C254S361000, C254S266000, C254S278000, C242S413500
Reexamination Certificate
active
07866630
ABSTRACT:
To provide a winding mechanism and a trawling apparatus capable of eliminating an excessive tension or slack generated in a wire wound around a drum and keeping the tension or wire length of the wire constant.A winding mechanism with tension control function includes a reversibly rotatable liquid-pressure motor rotating a drum having a wire wound therearound, a liquid-pressure pump coupled directly with the liquid-pressure motor and supplying hydraulic oil, and an electric motor rotating to drive the liquid-pressure pump. The winding mechanism further includes a control unit controlling a torque of the electric motor based on a variation in load current of the electric motor and winding off or winding up the wire to keep the tension of the wire at a set value.
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Doi Hirohumi
Hasegawa Kenzo
Miyajima Shogo
Satoh Hiroshi
Ueki Shuji
Dai-Ichi Electric Co., Ltd.
Langdon Evan H
Mitsui Engineering & Shipbuilding Co. Ltd.
Oliff & Berridg,e PLC
Tsurumi Seiki Co., Ltd.
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