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:
Aug. 02, 1983
Filed:
Aug. 30, 1982
Applicant:
Inventor:
William R Hamilton, Houston, TX (US);
Assignee:
Hughes Tool Company, Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
B66C / ;
U.S. Cl.
CPC ...
294 90 ; 175 85 ;
Abstract
A link engaging pipe elevator is shown having link engaging arms and an automatic locking mechanism. Spring tension in the locking mechanism is overcome when the elevator body is rested on a substantially flat surface allowing unrestrained movement of the link engaging arms. As the elevator is lifted off the flat surface, the locking mechanism is activated and the link engaging arms are locked into place. A cam and cam roller assist in moving the link engaging arms between the full open and closed positions.