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:
Aug. 12, 1980
Filed:
Jun. 12, 1978
Applicant:
Inventor:
Daniel L Neill, Belleville, MI (US);
Assignee:
Kelsey Hayes Co., Romulus, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60T / ;
U.S. Cl.
CPC ...
188138 ; 188163 ; 192 35 ; 192 / ; 335281 ;
Abstract
An electromagnet for brakes and clutches having outer and inner poles and an electrical coil for creating a magnetic field between these poles is provided having a circumferential gap in the forward portion of the outer pole. The gap reduces the flux density over the forward portion of the magnet face while increasing the flux density over the rearward portion. The variable flux density over the magnet face thus establishes an unbalance of forces attracting the magnet toward the armature plate causing the magnet to engage the armature plate heel first thereby eliminating 'squeal' caused by magnet gouging and two plane wear of the magnet's friction face.