Title:
GRAVITY SUPPORTING AND ABSORBING DEVICE
Document Type and Number:
Japanese Patent JPS5412078
Kind Code:
A
Abstract:
A hydraulic counterweight and shock-absorbing system for unbalanced loads comprises a hydraulic cylinder having a reciprocable piston attached to a rod which controls the position of the load. The hydraulic cylinder is filled with a hydraulic liquid and is provided with a valved by-pass conduit which is selectively operable to permit free movement of the piston in a "free-wheeling" mode. An accumulator partially filled with hydraulic liquid under a high-pressure gas phase is operatively connected to the rod end of the cylinder to provide a shock-absorbing function during a "hook-up" mode. In a "disconnect" mode, by-pass conduits provided with a check-valve and with a relief or pressure-controlled valve permit unimpeded upward movement of the load in response to an external applied force, but prevent downward movement of the load except on application of a force exceeding the weight of the load.
Inventors:
JIYON ESU ANDAAPONTO
Application Number:
JP6281478A
Publication Date:
January 29, 1979
Filing Date:
May 25, 1978
Export Citation:
Assignee:
CHICAGO BRIDGE & IRON CO
International Classes:
B63B21/60; B63B22/02; F16F9/00; F16F9/28; (IPC1-7): B63B21/00; F16F9/00