公开(公告)号：US4902202A

公开(公告)日：1990-02-20

申请号：US220234

申请日：1988-07-20

申请人： Charles J. Bowden

发明人： Charles J. Bowden

IPC分类号： F04C14/26 ,  F04B49/02 ,  F04B49/08 ,  F04C2/08 ,  F04C2/18 ,  F04C15/06

CPC分类号： F04C14/26

摘要： Variable discharge and energy recovery is produced by an adjustable spool in fluid communication with the outlet chamber for adjustably providing pressurized fluid from the outlet chamber to selected portions of the demeshing area of the intermeshing teeth to vary the discharge flow of the pump and the amount of energy recovery. This results in maintaining a positive pressure in selected portions of the demeshing area as well as equalizing the pressure in the selected areas to the pressure in the outlet chamber. The adjustable spool also controls the connection between the inlet chamber and the demeshing area to vary the energy recovery.

公开(公告)号：US4819430A

公开(公告)日：1989-04-11

申请号：US460051

申请日：1983-01-21

申请人： Lanson Becker

发明人： Lanson Becker

IPC分类号： F16K11/16 ,  F15B11/00 ,  F15B11/02 ,  F15B11/17 ,  F16D31/02

CPC分类号： F15B11/17 ,  F15B2211/20538 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/212 ,  F15B2211/30505 ,  F15B2211/40507 ,  F15B2211/40515 ,  F15B2211/45 ,  F15B2211/455 ,  F15B2211/7142 ,  F15B2211/781

摘要： A hydraulic fluid circuit system is provided for use in a vehicle and having a priority and a second fluid circuit therein. A variable displacement pump is the primary fluid source for the priority circuit, and a fixed displacement pump is the primary fluid source for the second fluid circuit. A demand valve responsive to differential fluid pressure between the priority circuit and the output of the variable displacement pump selectively switches increasing amounts of output from the fixed displacement pump into the priority circuit in proportion to the output of the variable displacement pump. The demand valve includes a three positioned spool valve. The priority circuit may include a hydraulic steering system, and the second fluid circuit may include an implement or accessory circuit.

摘要翻译： 提供了用于车辆中并具有优先级的液压回路系统和其中的第二流体回路。 可变排量泵是优先电路的主要流体源，固定排量泵是第二流体回路的主要流体源。 响应于优先级电路和可变排量泵的输出之间的差分流体压力的需求阀选择性地将固定排量泵的输出量增加到与可变排量泵的输出成比例的优先电路。 需求阀包括三位滑阀。 优先电路可以包括液压转向系统，并且第二流体回路可以包括工具或辅助电路。