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:
Oct. 28, 2003
Filed:
Jul. 19, 2000
Applicant:
Inventors:
Shigeto Kamata, Yokohama, JP;
Toshio Matsuki, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 4/102 ; H02K 9/00 ;
U.S. Cl.
CPC ...
H02K 4/102 ; H02K 9/00 ;
Abstract
A linear motor includes a magnet, a coil, and a jacket having an inside member that is comb-shaped having teeth, extending along a driving direction. The coil is engaged by the teeth of the comb-shaped member. A cooling medium flows through an inside space enclosed by the jacket. Unwanted deformation or breakage of the jacket can be avoided even if the pressure of the cooling medium is enlarged or the thickness of a small-thickness portion of the jacket is made smaller. A higher cooling efficiency is thus attainable by increasing the flow rate of the cooling medium.