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. 04, 2004
Filed:
Aug. 26, 2002
Toru Shikayama, Kitakyushu, JP;
Shusaku Yoshida, Kitakyushu, JP;
Nobuyuki Irie, Kitakyushu, JP;
JianPing Yu, Kitakyushu, JP;
Kabushiki Kaisha Yaskawa Denki, Kitakyushu, JP;
Abstract
A canned linear motor such that increase of the temperature of the mover is suppressed, the viscous damping force is reduced, and the strength of the can does not deteriorate. A canned linear motor comprises two parts, in one of which a permanent magnet is provided as a field system and in the other of which a three-phase armature winding, a winding fixing frame for supporting the armature winding, a coolant passage through which a coolant for cooling the surface of the armature winding passes, a can ( ) covering the armature winding and the coolant passage, and a header ( ′) for sealing the can. Slits ( ) extending in the direction of travel and parallel to each other are formed in the can ( ).