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. 12, 1991
Filed:
Feb. 14, 1990
Applicant:
Inventor:
Kurt H Andersson, Tyreso, SE;
Assignee:
Atlas Copco MCT AB, Nacka, SE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175135 ; 175215 ; 175218 ; 175318 ; 175324 ;
Abstract
Device in impact machines. The device comprises a set of rods comprising a number of rods (6) which are journalled in a surrounding set of tubes (7) by means of elastic bushings (52, 53). One of the bushings is provided with a lip (54) which sealingly rests against the rod (6) when flushing medium is not supplied to the space between the set of rods and the set of tubes but allows passage of flushing medium at drilling.