Automatic grapple control system

Details Automatic grapple control system Automatic grapple control system

B - Operations, Transporting

66

C

214/46, 138/74.1

B66C 3/16 (2006.01) B66C 1/58 (2006.01)

Patent

CA 1090232

Abstract of the Disclosure A grapple tong system has first and second hydraulic lines for closing and raising the grapple tongs, respectively. A hydraulic system is provided for automatically, controllably passing fluid Prom the second to the first line in response to a preselected pressure in the first line and a higher pressure in the second line for automatically, controllably urging the grapples to a closed position.

317925

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