F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
F15B 13/06 (2006.01) E02F 9/22 (2006.01) F15B 11/08 (2006.01) F15B 11/16 (2006.01) F15B 21/04 (2006.01)
Patent
CA 2082931
2082931 9208055 PCTABS00013 Fluid systems having fluid motors which control aiding type loads many times have problems with cavitation in one end of the fluid type motor during lowering thereof. It is desirable to eliminate all cavitation in the fluid motor during operation. In order to eliminate cavitation during lowering of an aiding type load and to provide a positive pressure therein, the subject arrangement provides an exhaust pressurizing control (184) for use in a fluid system (10). The exhaust pressurizing control (184) includes an exhaust manifold means (80) having selector means (88) to provide a positive pressure in the exhaust manifold means (80) during lowering of an aiding type load (W1). The selector means (88) includes pressure limiting and unloading means (90) operative to provide a positive pressure in the exhaust manifold means (80) during lowering of the aiding type load (W1) and to unload the pressurized fluid in the exhaust manifold means (80) during raising of a resisting type load (W1). The pressurized fluid in the exhaust manifold means (80) is available to the fluid motor (16) through anti-cavitational valve means (109). This arrangement effectively eliminates cavitation in the fluid motor (16).
Caterpillar Inc.
Smart & Biggar
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