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:
Apr. 22, 2003
Filed:
Dec. 21, 2000
Applicant:
Inventors:
Assignee:
Pierburg AG, Neuss, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 1/300 ;
U.S. Cl.
CPC ...
H02K 1/300 ;
Abstract
A wet-running direct-current motor for a fuel pump having a commutator ( ) formed from carbon lamellas ( ), and carbon brushes ( ) having brush running faces ( ) which are fluted in the direction of rotation. The fluting is obtained by curved, parallel ribs of triangular cross-sections whose apexes define the brush running face. The curved ribs have radii offset from the curvature of the commutator surface, the offset being achieved by offset of the center of the radius of each rib in a direction counter to the direction of relative rotation of the commutator and brushes. The motor is rendered usable for fuel pumps of diesel engines.