Traveling transmission of working vehicle

Details Traveling transmission of working vehicle Traveling transmission of working vehicle

2006-10-24

2006-10-24

Lorence, Richard M. (Department: 3681)

192 clutches and power-stop control

Transmission control and clutch control

Common control

C192S003620, C192S003630, C192S083000

Reexamination Certificate

active

07124867

ABSTRACT:
In a traveling transmission in which an auxiliary transmission is interposed between a main clutch and a mechanical transmission, the auxiliary transmission is configured such that power transmission is cut out interlockingly with the disengagement operation of the main clutch. For example, the auxiliary transmission is configured as a high-low speed selector device including a hydraulic-operated first hydraulic clutch and a spring-operated second hydraulic clutch. Preferably, there should be provided a controller for changing the position of a direction switching valve for the first and second hydraulic clutches based on the operation of an operating member such as a pedal for disengaging the main clutch. According to the present invention, it is possible to shorten a time required for a speed change operation by the mechanical transmission and, also, to achieve a smooth operation by the mechanical transmission.

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English translation of International Search Report for Appl. No. PCT/JP03/04270, Japanese Patent Office, mailed on Jul. 15, 2003, 2 pages.
Supplemental European Search Report for European Appl. No. 0374 5896 (from International Appl. No. PCT/JP03/04270), European Patent Office, Munich, mailed on Jul. 7, 2006, 3 pages.

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