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. 19, 2004
Filed:
Feb. 20, 2002
Yasushi Koyanagawa, Isehara, JP;
Hidehiko Mori, Hachinouji, JP;
Tatsuro Kato, Tokorozawa, JP;
Masanobu Sugimine, Ohmiya, JP;
Daisuke Shinohira, Tokyo, JP;
Sumitomo Heavy Industries, Ltd., Tokyo, JP;
Abstract
A coil in a coil unit for a linear motor is evenly cooled in the lengthwise direction to reduce an influence of heat on the outside from the coil unit. The coil unit includes the plate-shape coil extending in a traveling direction of the linear motor, a shell for internally storing the coil while maintaining a predetermined gap to the coil, and leading a refrigerant through the gap to cool the coil, a main flow passage formed inside the shell while extending in a lengthwise direction X of the coil, and leading the refrigerant supplied from the outside into itself, and a plurality of branch flow passages formed at a predetermined interval in the lengthwise direction X on the main flow passage for leading out the refrigerant led into the main flow passage in a widthwise direction Y of the coil. The refrigerant led out from the branch flow passages after having flown through the main flow passage flows into the gap between the shell and the coil, and cools the coil along the widthwise direction Y.