F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/63, 138/77
F15B 21/00 (2006.01) F04B 49/00 (2006.01) F16H 61/46 (2006.01)
Patent
CA 1044118
ABSTRACT OF THE DISCLOSURE A hydraulic system for controlling the displacement of a plurality of variable displacement pumps driven by a single prime mover including a source of pilot fluid under pressure including a fixed displacement pump adapted to be driven by the prime mover proportional to the speed thereof, a double-piloted, underspeed valve having an inlet and an outlet, the outlet being adapted to be connected to the variable displacement pumps for controlling displacement thereof, a conduit connecting one of the pilots to the source, an additional conduit, including a flow re- stricting device, connecting the other of the pilots to the source, and a summing valve having ports adapted to be connected to respective ones of the pumps, a port connected to the second conduit and a port connected to the inlet of the underspeed valve. - 1 -
287969
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