Continuous-advance hydraulic cable mover
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United States of America Patent
Stats
-
Jun 10, 1986
Grant Date -
N/A
app pub date -
Jan 24, 1985
filing date -
Jan 24, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A cable mover has a generally stationary support, a tube centered on an axis and having a pair of axially opposite ends, a swivel joint carrying the tube on the support and permitting the tube to move only nonaxially thereon, and respective axially double-acting actuators carried on the tube ends. Respective double-acting grippers are carried on the actuators. The cable axially traverses the grippers, actuators, and tube. The grippers each have two sets of wedge jaws engageable with the cable, one of the sets of each gripper being effective to wedge in one axial direction with the cable and to slide in the other direction, and the other set of each gripper being oppositely effective. Each gripper also has a disabling body displaceable between end positions and through a central position with the body disabling one of the respective sets of jaws in one end position, the other set of jaws in the other end position, and neither set of jaws in the central position. A hydraulic controller is connected to the actuators and to the disabling means for reversing the actuators and the disabling means in accordance with the position of the actuators.
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