Transmission direction selection system

Details Transmission direction selection system Transmission direction selection system

1985-12-10

1987-07-21

Herrmann, Allan D.

Machine element or mechanism

Control lever and linkage systems

Multiple controlled elements

74335, 192 358, 192 0052, B60K 2000, B60K 2010

Patent

active

046809830

ABSTRACT:
A drive direction selection system for a vehicle transmission including a source of electrical power, a first circuit for supplying an electrical signal from the source to a forward drive direction engagement means and a second circuit for supplying an electrical signal from the source to a reverse drive direction engagement means. Forward and reverse drive direction selection pedals are provided which when depressed close forward and reverse direction selector switches in the first and second circuits respectively. First interlock means are arranged to break the first circuit on closing of the reverse direction selector switch and to maintain the first circuit broken until both switches are again simultaneously in their open condition. Second interlock means are arranged to break the second circuit on closing of the forward direction selector switch and to maintain the second circuit broken until both switches are again simultaneously in their open condition. The system thus offers protection against unexpected changes in drive direction of the vehicle. The system may also include a hand operated drive direction selection control enabling the vehicle operator to select the drive direction by operating the pedals or hand control as he chooses.

REFERENCES:
patent: 3789688 (1974-02-01), Minks
patent: 4129047 (1978-12-01), Dornan
patent: 4289222 (1981-09-01), Esthimer

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