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:
Nov. 17, 1987
Filed:
Apr. 03, 1984
Hubert A Perraudin, Champigny sur Marne, FR;
Equipements Automobiles Marchal, Issy-les-Moulineaux, FR;
Abstract
In accordance with the invention, a wheel (16) is used as the burnishing wheel for a helical thread, the periphery of which wheel has a profile whose shape matches that of the thread to be surfaced. The wheel (16) is mounted such that it rotates freely about an axis which is inclined with respect to the axis of the screw (10) which is caused to rotate about its own axis. The wheel (16) is applied in a resilient manner to the screw (10) by means of a compression spring (56) which pushes the pivoting support (18) of the wheel (16) in the direction of the screw (10). The carriage (20) on which the support (18) is pivotably mounted is freely displaceable in translation parallel to the axis of the screw (10) on a rail (22). The invention may be used for finishing by means of burnishing of a helical thread using an automatic repetitive cycle comprising a predetermined number of passes of a burnishing wheel along the thread.