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:
May. 27, 1986
Filed:
Sep. 23, 1983
Applicant:
Inventors:
Herman O Henderson, Jr, Houston, TX (US);
Richard L Coombs, Houston, TX (US);
Assignee:
Smith International, Inc., Newport Beach, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
E02D / ;
U.S. Cl.
CPC ...
405195 ; 166339 ; 166349 ; 405224 ;
Abstract
The invention disclosed herein includes a method and apparatus for latching a temporary guide base to a permanent guide base as the permanent guide base is raised, whereby the two guide bases may be retrieved simultaneously. The apparatus includes a socket means in each guideline of the temporary guide base and a latch means in the base of each guidepost of the temporary guide base. When the permanent guide base is lowered, the latch means passes over the socket means. When the permanent guide base is raised, however, the latch means engages the socket means and the temporary guide base is raised.