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:
Dec. 28, 1976
Filed:
Aug. 29, 1975
William D Armbrust, Greensburg, PA (US);
Robert S Gulibon, Mount Pleasant, PA (US);
Alan L Echtenkamp, Greensburg, PA (US);
Kennametal Inc., Latrobe, PA (US);
Abstract
A power driven rotary tool having a specially constructed bearing ring spacer means adapted to oppose self-induced vibrations. The power driven rotary tool comprises an outer housing frame, a driven rotatable shaft, a set of antifriction bearings disposed between the outer frame and the rotatable shaft for support of the rotatable shaft, a bearing ring spacer means in solid contact with either the outer housing frame or the outer races of the antifriction bearing and between a set of antifriction bearings, longitudinal passageways provided in the bearing ring spacer means and rigid impact elements disposed in the passageway to oppose self-induced vibrations with a power driven rotary tool.