F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/69.13
F15B 11/16 (2006.01)
Patent
CA 1139638
HYDRAULIC SYSTEM WITH SELECTIVELY CONNECTABLE PUMPS ABSTRACT OF THE DISCLOSURE A hydraulic system includes a plurality of pressure and flow compensated pumps, a plurality of fluid motors, each connected by a control valve to one of the pumps. Means are provided for selectively connecting each of the fluid motors to at least another of the pumps in addition to the respective one pump. This means includes a plurality of pilot-operated poppet valves each having a first port connected to one of the pumps, interconnected second ports, pressure responsive surfaces, and orifice means connecting the pressure responsive surfaces of the poppet valves and the second ports. A bleed valve is connected to the second ports of the poppet valves to provide a vent path for the second ports to allow the poppets to open providing cross communication between the first ports.
395513
Caterpillar Tractor Co.
Kirby Eades Gale Baker
LandOfFree
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