|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||91/459 ; 91/464 ; 91/467 ; 137/62545|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 6 인용 특허 : 0|
A four-way fluid flow control valve for selectively interconnecting opposite sides of a fluid motor with a source of fluid pressure and a low pressure return line for driving the motor in opposite directions. A clevis-like, bifurcated metering member has opposed, cup-shaped elements at its bifurcated end which are shiftable across opposed, flat surfaces to produce the desired fluid flow interconnections. The cup-like elements present fluid transfer zones for selectively interconnecting different fluid flow passages.
In combination with a fluid control system including a source of pressurized fluid, a low pressure reservoir, and a fluid operated motor having a pair of motor ports communicating with opposed fluid chambers of the motor; a closed center flow control valve comprising: a housing having an internal cavity, an inlet port communicating with said source of fluid, an exhaust port communicating with said reservoir, and a pair of work ports communicating with said motor ports, said internal cavity communicating with one of said inlet and outlet ports; means in t...