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:
Aug. 25, 1992
Filed:
Jul. 11, 1991
Applicant:
Inventor:
Stephen E Dourson, Dayton, OH (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01Q / ;
U.S. Cl.
CPC ...
343903 ; 343715 ;
Abstract
A compact direct drive system for an extensible and retractable antenna assembly uses a one-piece antenna and no threads or gears. The one-piece antenna is supported so as to slide axially up and down, but is restrained against turning. It runs through the hollow drive shaft of a coaxially supported electric motor. Traction rollers supported on skewed shafts fixed to the end of the drive shaft drive the antenna up and down.