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:
Feb. 17, 1981
Filed:
Apr. 24, 1979
Applicant:
Inventors:
Charles W Haynes, Spring, TX (US);
Adrian E Pitts, Houston, TX (US);
Assignee:
Joy Manufacturing Company, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25B / ;
U.S. Cl.
CPC ...
81 5718 ; 81 572 ; 81 5721 ;
Abstract
A rotary tong used in well-drilling operations to make-up and break-out drill strings which incorporates readily-interchangeable sets of jaws, one of which may be used for drill pipe and the other of which can be used for relatively thin-walled well casing.