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:
Apr. 11, 2000
Filed:
Sep. 04, 1998
Takashi Ban, Kariya, JP;
Shigeru Suzuki, Kariya, JP;
Hidefumi Mori, Kariya, JP;
Tatsuya Hirose, Kariya, JP;
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, JP;
Abstract
A heat generator has a heating chamber and a pair of heat exchange chambers located adjacent to the heating chamber. The heating chamber includes inner walls and accommodates viscous fluid. A rotor is located in the heating chamber and has shearing surfaces facing the inner walls of the heating chamber. The rotor is rotated for shearing the viscous fluid that occupies the clearance between the inner walls of the heating chamber and the working surfaces thereby generating heat. Each inner wall includes a center region, which is located in the vicinity of the axis of the rotor, and a peripheral region, which surrounds the center region. Heat generated in the heating chamber is transferred to the heat exchange chambers and heats circulating fluid in the heat exchange chambers. Each inner wall includes grooves extending radially from the peripheral region to the center region. Each groove includes a bottom and a pair of side walls. The cross-section of each groove is U-shaped, without sharp corners, to prevent flow disturbances in the groove and to prevent wear of the mold that forms the grooves.