Machine element or mechanism – Gearing – Interchangeably locked
Reexamination Certificate
2005-08-12
2008-10-21
Wright, Dirk (Department: 3681)
Machine element or mechanism
Gearing
Interchangeably locked
Reexamination Certificate
active
07437965
ABSTRACT:
A gear change control device and a method for a work vehicle for reducing a heat quantity generated by gear shift clutches of a transmission and a gear shift shock to reduce a load on the clutches without inducing elongation of a cycle time or deterioration of a work efficiency. A clutch pressure (Pm) of an input clutch(10) is reduced to switch from a connected state to a power-transmittable sliding state at a time (tE) after a time (tA) at which a cut-off operation of a gear shift clutch used before gear shifting (reverse clutch22) is started and before a time (tD) at which the connecting operation of a selected gear shift clutch to be used after the gear shifting (forward clutch21) is completed.
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German Office Action (in English language) issued Aug. 8, 2007.
Komatsu Ltd.
Wenderoth , Lind & Ponack, L.L.P.
Wright Dirk
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