Automatic pipe elevator

Details Automatic pipe elevator Automatic pipe elevator

1983-08-12

1985-06-11

Marbert, James B.

Handling: hand and hoist-line implements

Grapple

Pivoted jaws

294116, B25J 1500

Patent

active

045224390

ABSTRACT:
A self-locking and unlocking elevator for use with drill pipe is disclosed which, in a specific embodiment, includes a pair of jaws, each shaped to support a length of pipe; and central and upper linkage assemblies, for opening and closing the jaws about a section of drill pipe. The invention also includes a ratchet mechanism for locking the jaws open to receive or release a length of pipe, or to allow changing the clamping surfaces to accommodate different sizes of pipe; and for unlocking the jaws to allow closure over and clamping of a length of pipe.

REFERENCES:
patent: 3249334 (1966-05-01), Sheperd et al.
patent: 4017112 (1977-04-01), Delest
patent: 4314611 (1982-02-01), Willis

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