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. 11, 1990
Filed:
Oct. 12, 1989
Applicant:
Inventor:
Patrick S Wang, Repulse Bay, HK;
Assignee:
Johnson Electric S.A., La Chaux de Fonds, CH;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K / ;
U.S. Cl.
CPC ...
310 42 ; 310233 ;
Abstract
A rotor in an electric motor comprises a shaft having a commutator and armature thereon. To prevent relative movement between the armature lamination stack and the commutator, a structural coating such as epoxy resin coats the shaft between the commutator and stack. The commutator base has a coaxial recess in the adjacent end. The base is urged towards the stack while the coating is still fluid to gather up the coating so that it is of substantial thickness on the shaft, at least partially filling the recess and a radial slot in the recess wall.