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. 21, 1992
Filed:
May. 08, 1991
Erkki A Koivunen, Livonia, MI (US);
Other;
Abstract
This bi-directional clutch combines the functions of two separate opposite acting clutching systems, each consisting of a one-way roller or sprag clutch and an in-series coupled multi-plate friction unit. The clutch is operative regardless of direction of torque to provide fully synchronized upshifts and downshifts of gear ratios in automatic transmissions. This clutch incorporates a torque responsive reaction plate which regulates the apply pressure in accordance to the torque carried by the clutch. Consequently, when the torque acting in selected direction descends to zero at the start of torque reversal, the clutch is automatically released. Direction of one-way action is selected by switching clutch feed and exhaust oils by controls.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile