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:
Jan. 08, 2002
Filed:
Nov. 03, 1999
Jochen Schmid, Bühl-Neusatz, DE;
Oswald Friedmann, Lichtenau-Ulm, DE;
LuK Getriebe-Systeme GmbH, Buhl/Baden, DE;
Abstract
A continuously variable transmission with two adjustable pulleys and an endless torque-transmitting chain trained over the pulleys has a torque sensor which transmits variable torque from the rotary output element of a prime mover (such as the engine of a motor vehicle) to the axially movable flange of one of the pulleys. The torque sensor comprises one or more rolling elements and cam faces and/or guide surfaces which confine the rolling element(s) to movements radially and/or axially of the respective pulley. At least the rolling element(s) and those components of the torque sensor which define the cam faces and/or the guide surfaces of the torque sensor are confined in a fluid-containing plenum chamber adjacent the axially movable flange of the one pulley to thus achieve a pronounced reduction of space requirements of the unit including the one pulley and the torque sensor in the axial direction of the one pulley. The fluid in the plenum chamber serves to urge the axially movable flange of the one pulley against the adjacent edge face of the chain and to thus urge the other edge face of the chain against the axially fixed flange of the one pulley.