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:
Jul. 03, 1990
Filed:
Jun. 13, 1989
Werner Krude, Oxford, MI (US);
GKN Automotive, Inc., Auburn Hills, MI (US);
Abstract
A continuously variable transmission having a variable diameter pulley assembly. The variable diameter pulley assembly has an array of belt engaging elements arranged in a circular pattern having a diameter variable as a function of the relative rotational orientation of supporting inner disk members and outer disk members. A hub connected to the outer disk members has a plurality of helical slots concentric with the axis of rotation. A concentric disk drive member has a plurality of helical slots which rotate in the opposite direction of the helical slots in the hub. Each helical slot in the disk drive member crosses one of the helical slots in the hub to form a plurality of through apertures. An actuator pin disposed in each through aperture locks the disk member to the hub for rotation. An axially displaceable pin cage displaces the actuator pins along the axis of rotation. The axial displacement of the actuator pins in the crossing helical slots rotates the disk drive member and the inner disk members relative to the hub and the outer disk members radially displacing the belt engaging members. An alternate embodiment has crossing helical grooves in place of the crossing helical slots and a ball received in the intersection of the crossing helical grooves.