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:
Jun. 16, 1987
Filed:
May. 20, 1986
Kojiro Yamaoka, Nishinomiya, JP;
Hideaki Okada, Takarazuka, JP;
Kanzaki Kokyukoki Mfg. Co., Ltd., Amagasaki, JP;
Abstract
In a self-propelled working vehicle having a speed change mechanism wherein a plurality of change gears journaled on a shaft are coupled one at a time by key means disposed within and shiftable along the shaft, fluid-actuated clutch is provided for interrupting input of power to the speed change mechanism before shifting operations. For protecting gear-engaging clutch portion of the key means for damage, fluid pressure applied to the clutch from a disengaged condition thereof is increased gradually by a relief valve including a pressure-modulating control piston. For disengaging the clutch before shifting operations, an unloader valve is provided which is actuated by moving a speed change lever along a direction other than the key-shifting direction. Relief valve means also acting as an unloader valve for disengaging the clutch is disclosed. Differential-locking clutch is also disclosed which is operated by fluid for actuating the clutch in the transmission path.