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:
Nov. 26, 1991
Filed:
Aug. 15, 1990
Applicant:
Inventors:
Gary E Gresham, Fort Worth, TX (US);
Burnis H Tucker, Joshua, TX (US);
Assignee:
Transportation Technologies, Inc., Forth Worth, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
318266 ; 318286 ; 318466 ; 7447 / ;
Abstract
A shifter (10) comprises control electronics (20) which eliminate mechanical switches, providing increased reliability. The shift mechanics include a double-spring (28,30) disposed between a spring guide (32). The springs are compressed responsive to a driving screw (36) under control of a bidirectional motor (12). The motor (12) is controlled by the control electronics (20).