The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 1985
Filed:
Aug. 12, 1983
Applicant:
Inventor:
Keith M Haney, Wichita Falls, TX (US);
Assignee:
Walker-Neer Manufacturing Co., Inc., Wichita Falls, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
B25J / ;
U.S. Cl.
CPC ...
2941101 ; 294116 ;
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.