|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/62548 ; 137/495 ; 137/59612|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 8 인용 특허 : 1|
A hydraulic motor drives the cooling fan of an internal combustion engine. Fluid flow from a fixed displacement pump is directed through a pilot-operated pressure-compensated control valve to the hydraulic motor. The valve has a continuous bias to a fan-on position for directing fluid to the fan motor. Flow to the fan motor is diverted by the valve as a function of the pressure of the fluid in the system. In addition, flow to the fan motor is diverted as a function of a pilot pressure signal which is controlled by the temperature of the engine coolant fl...
Apparatus for controlling fluid flow in a hydraulic system: said apparatus comprising a housing having an axially extending bore, an inlet port, an outlet port, a pilot port and a bypass port; a valve element movable in said bore for controlling fluid flow between said inlet port, said outlet port and said bypass port; a pilot fluid pressure actuated device connected with said valve element for moving said valve element in one axial direction and a spring for moving said valve element in the opposite axial direction; said pilot pressure actuated device b...