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The General Motors Corporation patent solves the following problem:
This invention relates to shift control for synchronized countershaft transmissions, and especially, the support mechanisms for the control, and especially a selector rod type shifter with an electro-mechanical controller for build both linear and rotary motion of the selector rod.
Our analysis of this patent is as follows:
General Motors Corporation’s patent US 5251503 A deals with Electro-mechanical power controller for a gear shift mechanism.
An electro-mechanical controller for a transmission selector in a synchronized countershaft transmission, includes a selector shaft driven linearly and rotatably by a power actuator mechanism to provide gear selection in the countershaft transmission. A selector rod with selector shaft by a connection that provides compliance and damping therebetween. The selector rod has a finger mechanism which is selectively connectible to the transmission synchronizers to give the desired gear selection. The selector shaft and selector rod controlled both linear and rotatable motion by translating mechanism actuator mechanism thus controlling selector rod position in the gear selection and a neutral state.
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