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. 13, 2004
Filed:
Mar. 12, 2003
Applicant:
Inventors:
David A. Lange, Bay City, MI (US);
Sid M. Zimmerman, Pacific Palisades, CA (US);
Assignee:
Thomson Saginaw Ball Screw Co., LLC, Saginaw, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16C 2/702 ;
U.S. Cl.
CPC ...
F16C 2/702 ;
Abstract
A multiple extend ball screw and nut linear actuator incorporates a revolvable axially restrained ball screw with a ball nut thereon. A constant speed reversible drive revolves the screw to move the ball nut forwardly and rearwardly. External helical threads of the same hand as the ball nut threads are provided externally on the ball nut but have a substantially reduced lead. A second rotatably restrained nut having threads matching the external threads on the ball nut mounts on the ball nut and connects to the system to be actuated.