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:
Oct. 19, 1999
Filed:
May. 01, 1997
Applicant:
Inventor:
Rolf Alexis Jacobsson, Saltsjo-Boo, SE;
Assignee:
Atlas Copco Tools AB, Nacka, SE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
173216 ; 173217 ; 7457 / ;
Abstract
A portable power tool for operating a wheel type working element comprises an output spindle (12) which is drivingly connected to a rotation motor (11) and which is provided with an automatic ball type balancing device (21) and a working implement mounting device (22), wherein the balancing device (21) comprises a peripheral wall (38) provided with a ball race (43), a transverse end wall (39) and a number of balls (41) freely movable along the ball race (43), and the peripheral wall (38) and the end wall (39) are formed in one piece with each other as well as with the output spindle (12).