B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
B65H 59/00 (2006.01) B65H 54/74 (2006.01) B65H 59/04 (2006.01) B65H 75/34 (2006.01) H02G 1/04 (2006.01) H02G 7/02 (2006.01)
Patent
CA 2305482
A cable tension control system for maintaining a substantially constant tension on a cable being wound or unwound from a support spool is described. The tension control system comprises a hydraulic motor for driving a spool support shaft. A hydraulic pressure circuit is connected to the motor and has a controllable pressure relief valve for controlling the operating hydraulic pressure fed to the motor. A diameter sensing mechanism is provided for monitoring the change in the diameter of the cable wound about the spool. The diameter sensing mechanism is connected to a valve control linkage for controlling the pressure relief valve in relationship to the diameter of the cable present about the spool and thereby varying the operating hydraulic pressure of the motor to control a resistance drive force applied to the spool support shaft to control the tension on the cable being wound or unwound.
Desloges Marc
Raynauld Roger
Del Technologie
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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