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. 25, 2003
Filed:
Aug. 01, 2001
Denso Corporation, Kariya, JP;
Abstract
In a two-layer brush for a commutator, the plane form projected on a commutator surface is nearly similar to the plane form of the segment. A molding die used in brush fabrication has a lower punch which slides obliquely up and down along a sliding groove provided in the lower die, and an upper punch which can slide obliquely up and down in relation to the lower punch. The pressure applying face of the upper punch is formed nearly level, while the pressure receiving face of the lower punch is inclined by a predetermined angle relative to the pressure applying face of the upper punch. It is, therefore, possible to form a first brush material to a predetermined shape, and to apply a uniformly pressure to the second brush powder, to thereby form a second brush material having nearly fixed thickness.