Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – Condition responsive means for modifying working member...
Patent
1987-07-21
1989-03-28
Garrett, Robert E.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
Condition responsive means for modifying working member...
91513, 91171, 91514, F15B 1100, F15B 1300
Patent
active
048153575
ABSTRACT:
The present invention relates to, in combination, a vehicle utilizing a first hydraulic cylinder to operate lifting means and a second hydraulic cylinder to operate end effector means, each of the cylinders including a piston, the pistons when moved toward their "up" sides causing the lifting means and end defector means to move in a first direction and when moved toward their "down" sides causing the lifting means and means to move in a second direction, and a load self-leveling system for the vehicle, the system comprising a pair of fluid flow dividers interposed in flow lines between a source of hydraulic fluid under pressure and the first and second hydraulic cylinders, the flow dividers being structured to direct a greater flow of hydraulic fluid to the first cylinder and a lesser flow to the second cylinder, each of the flow dividers comprising adjustable spool valve means located in flow passages between the source of hydraulic fluid and the first and second hydraulic cylinders.
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Denion Thomas
Garrett Robert E.
Lull Corp.
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