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:
May. 19, 1998
Filed:
Nov. 18, 1996
Yukio Ohtani, Kawasaki, JP;
Tokico Ltd., Kanagawa-Ken, JP;
Abstract
A bearing 12 is provided on the end portion of a housing 30. This bearing 12 supports a shaft 14. A magnetic circuit 15, 16 for driving the shaft 14 is provided between the shaft 14 and the housing 30 with a gap 29 passing through in an axial direction. An entry route R1 for leading gas from the outside of the housing 30 to the gap 29 in the magnetic circuit 15, 16 and an exhaust route R2 for exhausting the gas to the outside of the housing 30 are provided so as not to reach the bearing 12. As a result, the lifespan of the electric motor can be lengthened, the startup time can be shortened, the number of parts can be reduced, the number of steps required for processing and assembly can be reduced, and the power loss can be decreased.