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:
Feb. 15, 2000
Filed:
May. 16, 1997
David Bernard Drennen, Bellbrook, OH (US);
Gustavus Pearl Bock, Bellbrook, OH (US);
Ryan Lovell Wright, Dayton, OH (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A variable pitch screw-driven system includes a rotatable drive screw powered by a motor actuator. A cam sleeve includes a nut section and is disposed about the drive screw and is linearly translatable in response to rotation of the drive screw. The cam sleeve includes a cam track with a fixed cam follower positioned to travel within a cam track. Linear translation of the cam sleeve is altered by tracking of the cam follower within the cam track such that rotation of the cam sleeve is effected simultaneously with rotation of the drive screw resulting in an effective variable pitch of the variable pitch screw-driven system wherein linear translation of the cam sleeve results from both rotation of the drive screw and rotation of the cam sleeve.