Automatic gripper for gripping and holding a rod, especially on

Details Automatic gripper for gripping and holding a rod, especially on Automatic gripper for gripping and holding a rod, especially on

1986-07-15

1988-05-10

Cherry, Johnny D.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Locking device

2941101, 294113, 2941194, B66C 142, E21B 1906

Patent

active

047430559

ABSTRACT:
An automatic gripper, useful especially for gripping and holding drilling rods on a drilling rig, has a chassis with a front end in the form of a fork equipped with retractable jaws (50). The jaws are retracted by pushing contact with a drilling rod (40) when the rod enters the fork, whereupon a return mechanism (72) automatically restores the jaws to a closed position. The chassis is held fixed on a horizontal pivot axis by rupturable pins or the like. The pins rupture to permit the chassis to pivot when subjected to a predetermined torque, with friction members being provided to frictionally limit the pivotal movement of the chassis. The gripper is thus protected against damage from impacts with the rod lifting mechanism of the drilling rig, for example.

REFERENCES:
patent: 637594 (1899-11-01), Hett
patent: 2692059 (1954-10-01), Bolling
patent: 3112038 (1963-11-01), Breivik
patent: 3522966 (1970-08-01), Wood
patent: 4650235 (1987-03-01), Shaginian et al.

Affiliated with

Also associated with

Rating

Automatic gripper for gripping and holding a rod, especially on does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic gripper for gripping and holding a rod, especially on , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic gripper for gripping and holding a rod, especially on will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1315961