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. 05, 1980
Filed:
Jul. 25, 1978
Applicant:
Inventor:
John T Work, Anaheim, CA (US);
Assignee:
BJ-Hughes Inc., Long Beach, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16C / ;
U.S. Cl.
CPC ...
308-39 ; 175220 ; 308 / ; 308238 ;
Abstract
A guide bushing mountable in a supporting sleeve in the deck of a blast hole drill for guiding a drill string extending through the sleeve, the bushing having a tubular core providing a cylindrical axial bore adapted to receive and guide the drill string, the core having a flange by which it is supported in the supporting sleeve, and in which a resilient, elastomeric cushion mounted on the exterior of the core serves to cushion transverse movements of the bushing within the supporting sleeve. Preferably, the bushing is formed of two halves fastened together by hinges, so that it can be opened and laterally installed around the drill string.