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:
Aug. 21, 2007
Filed:
Jun. 08, 2005
Yasuyuki Suzuki, Shizuoka, JP;
Atsumi Muramoto, Shizuoka, JP;
Kazuo Hata, Shizuoka, JP;
Jatco Ltd, Shizuoka, JP;
Abstract
A frictional engagement structure includes a first drum arranged at the inner periphery of a transmission casing, a second drum arranged at the inner periphery of the first drum, first friction plates splined to the casing or the first drum, second friction plates splined to the second drum, the first and second friction plates being arranged alternately in the direction of an axis of rotation of the drums, a piston for pressing the first friction plates through a disk spring and ensuring coupling between the first friction plates and the second friction plates to frictionally engage the casing or the first drum with the second drum, and a spring bearing member arranged between the first friction plates and the disk spring and including a plate portion substantially parallel to the first friction plates and the outer peripheral portion arranged substantially perpendicular to the first friction plates and interposed between the disk spring and the first drum or the casing.