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:
Apr. 04, 1989
Filed:
Jun. 18, 1987
Keith V Leigh-Monstevens, Troy, MI (US);
Edward L Tury, Brighton, MI (US);
Leslie P Branum, Troy, MI (US);
Gregg A Thoe, Farmington, MI (US);
Ap Aero, Inc, Sterling Heights, MI (US);
Abstract
An electric shift apparatus for controlling a motor vehicle manual transmission. The apparatus includes a power module adapted to be bolted to the housing of the transmission, a control module adapted to be positioned in the passenger compartment of the vehicle, and a gear selector assembly positioned on the steering column assembly of the vehicle. The operator selects a transmission position by movement of an appropriate gear lever on the steering column, a signal corresponding to the selected position is transmitted to the control module, the control module compares this signal to a signal provided by limit switches in the power module indicating the instantaneous position of the transmission, and the control module generates a signal to the power module coded to impart the specific combination and sequence of crossover and shift movements to the transmission select lever required to move the select lever from its indicated crossover and shift position to the crossover and shift positions corresponding to the operator selected position. The required linear movement of the shift lever is provided by a ball screw assembly powered by a first electric motor and the required angular or crossover movement of the select lever is provided by a speed reduction unit driven by a second electric motor.