公开(公告)号：US06357230B1

公开(公告)日：2002-03-19

申请号：US09464583

申请日：1999-12-16

Applicant: Michael A. A'Hearn ,  David J. Carlson ,  Thomas J. Hajek, Jr. ,  Andy Hatcher ,  Michael D. Hudson ,  Patrick Quinn ,  Srikrishnan T. Tolappa

Inventor： Michael A. A'Hearn ,  David J. Carlson ,  Thomas J. Hajek, Jr. ,  Andy Hatcher ,  Michael D. Hudson ,  Patrick Quinn ,  Srikrishnan T. Tolappa

IPC: F16D3102

CPC classification number: E02F9/2207 ,  E02F9/2217

Abstract: A hydraulic ride control system is disclosed and adapted to control the ride of a machine having a load. The ride control includes an accumulator arrangement that is selectively connected with the actuator that is carrying the load to provide a cushion ride during traveling and to enable the pressure in the accumulator arrangement to be maintained substantially the same as the pressure in the actuator when raising the load and to permit the pressure in the accumulator arrangement to be lowered to that of the pressure in the actuator in the event the load is lessened. The ride control system also provides an arrangement that permits the accumulator arrangement to be bled down whenever the machine becomes disabled or when the machine is shut off.

Abstract translation: 液压行驶控制系统被公开并适于控制具有负载的机器的行驶。 行驶控制装置包括蓄能器装置，该蓄能器装置选择性地与承载负载的致动器连接，以在行驶期间提供缓冲坐骑，并且使得蓄能器装置中的压力能够保持与致动器中的压力基本相同， 在负载减轻的情况下，允许蓄能器装置中的压力降低到致动器中的压力。 行驶控制系统还提供了一种布置，其允许在机器停用时或当机器关闭时将蓄能器装置排出。

公开(公告)号：US06161467A

公开(公告)日：2000-12-19

申请号：US275153

申请日：1999-03-24

Applicant: Michael A. A'Hearn ,  Thomas J. Hajek, Jr. ,  Tony L. Marcott ,  Srikrishnan T. Tolappa

Inventor： Michael A. A'Hearn ,  Thomas J. Hajek, Jr. ,  Tony L. Marcott ,  Srikrishnan T. Tolappa

IPC: F15B11/024 ,  F15B13/04 ,  F15B13/042

CPC classification number: F15B13/0402 ,  F15B11/024 ,  F15B13/0422 ,  F15B2013/0413 ,  F15B2211/20576 ,  F15B2211/30505 ,  F15B2211/3051 ,  F15B2211/3052 ,  F15B2211/30525 ,  F15B2211/3111 ,  F15B2211/3133 ,  F15B2211/3144 ,  F15B2211/31576 ,  F15B2211/31588 ,  F15B2211/329 ,  F15B2211/35 ,  F15B2211/50527 ,  F15B2211/5153 ,  F15B2211/528 ,  F15B2211/6054 ,  F15B2211/7053 ,  F15B2211/7128 ,  F15B2211/75

Abstract: A fluid control system including a control valve providing a simple, easy to use regeneration capability in association with a pump, a tank, and a double acting actuator having a first actuating chamber and a second actuating chamber. The control valve has a first actuating chamber port connected to the first actuating chamber, a second actuating chamber port connected to the second actuating chamber, a tank port connected to the tank, a first pump port and a second pump port. The control valve includes a connecting passage connecting the first pump port and the second pump port to the pump, and is operable in a first position to allow fluid flow from the pump through the first pump port and the first actuating chamber port to the first actuating chamber and fluid flow from the second actuating chamber through the second actuating chamber port and the tank port to the tank. For regeneration, the control valve member is movable from the first position to a second position to allow the fluid flow from the second actuating chamber port to be diverted to the second pump port such that the fluid flow can pass through the connecting passage to the first pump port and through the first actuating chamber port to the first actuating chamber of the actuator.

Abstract translation: 一种流体控制系统，其包括与泵，罐和具有第一致动室和第二致动室的双作用致动器相关联的提供简单，易于使用的再生能力的控制阀。 所述控制阀具有连接到所述第一致动室的第一致动室端口，连接到所述第二驱动室的第二致动室端口，连接到所述箱的罐端口，第一泵端口和第二泵端口。 控制阀包括将第一泵口和第二泵口连接到泵的连接通道，并且可在第一位置操作，以允许流体从泵经过第一泵口和第一致动室端口流动到第一致动 室和流体从第二致动室通过第二致动室端口和罐端口流到罐。 为了再生，控制阀构件可以从第一位置移动到第二位置，以允许来自第二致动室端口的流体流转向第二泵口，使得流体流可以穿过连接通道到达第一位置 泵口并且通过第一致动室端口到致动器的第一致动室。

公开(公告)号：US5826487A

公开(公告)日：1998-10-27

申请号：US803347

申请日：1997-02-20

Applicant: Michael A. A'Hearn

Inventor： Michael A. A'Hearn

IPC: B62D5/07 ,  F15B11/02 ,  F15B11/05 ,  G05D16/00 ,  F15B11/00

CPC classification number: F15B11/05 ,  F15B2211/20538 ,  F15B2211/30505 ,  F15B2211/30525 ,  F15B2211/3054 ,  F15B2211/3144 ,  F15B2211/31588 ,  F15B2211/351 ,  F15B2211/4053 ,  F15B2211/413 ,  F15B2211/41509 ,  F15B2211/428 ,  F15B2211/465 ,  F15B2211/50536 ,  F15B2211/5151 ,  F15B2211/528 ,  F15B2211/555 ,  F15B2211/625 ,  F15B2211/7114 ,  F15B2211/781

Abstract: An unloader valve is connected to a pump and has first and second ends, a priority flow port communicating with the first end and being connected to a first conduit connected to a first hydraulic circuit, an excess flow port communicating with a tank, and a spring disposed at the second end biasing the unloader valve to a priority flow position with a force sufficient to maintain the pressure in the priority flow port above a predetermined minimum level. The unloader valve is biased toward an unloading position in opposition to the spring force by pressure generated force acting on the second end. A check valve is disposed between the first conduit and a second conduit connected to a second hydraulic circuit. A valve device controls the pressure at the second end of the unloader valve in response to pressure in the second conduit so that pressure in the second conduit is maintained above a second higher predetermined level.

Abstract translation: 卸载阀连接到泵，并且具有第一和第二端，优先流动端口与第一端连通并且连接到连接到第一液压回路的第一管道，与罐连通的多余流动端口和弹簧 设置在第二端，将卸载器阀偏压到优先流动位置，该力具有足以将优先流量端口中的压力保持在预定最小水平以上的力。 卸载阀通过作用在第二端上的压力产生力而相对于弹簧力偏压到卸载位置。 止回阀设置在第一管道和连接到第二液压回路的第二管道之间。 阀装置响应于第二管道中的压力来控制卸载器阀的第二端处的压力，使得第二管道中的压力保持在第二较高预定水平以上。

公开(公告)号：US06321534B1

公开(公告)日：2001-11-27

申请号：US09348490

申请日：1999-07-07

Applicant: Michael A. A'Hearn ,  Thomas J. Hajek, Jr. ,  Michael D. Hudson ,  Lawrence F. Schexnayder ,  Srikrishnan T. Tolappa

Inventor： Michael A. A'Hearn ,  Thomas J. Hajek, Jr. ,  Michael D. Hudson ,  Lawrence F. Schexnayder ,  Srikrishnan T. Tolappa

IPC: F16D3102

CPC classification number: B60G17/0152 ,  B60G17/056 ,  B60G2500/02 ,  B60G2500/022 ,  B60G2500/203 ,  E02F9/2207 ,  E02F9/2217 ,  E02F9/2296 ,  F15B1/021

Abstract: A ride control system adapted for use in a fluid system of a machine to cushion the ride of the machine, the machine having a frame with an actuator arrangement disposed between the frame and a load to raise the load relative to the frame, the actuator arrangement having a raise port and being operative in a raise mode to raise the load to a desired height in response to pressurized fluid being directed to the raise port from a source of the pressurized fluid, the ride control system including an accumulator arrangement and a valve arrangement connected between the accumulator arrangement, the actuator arrangement, and the source of pressurized fluid, and operative to selectively connect the accumulator arrangement to the raise port of the actuator arrangement when in the raise mode while maintaining the load at the desired height.

Abstract translation: 一种适于在机器的流体系统中使用以缓冲机器骑行的行驶控制系统，所述机器具有框架，所述框架具有设置在所述框架和负载之间的致动器装置以相对于所述框架升高所述负载，所述致动器装置 具有升高端口并且在升高模式下操作以响应于加压流体从加压流体的源引导到升高端口而将负载升高到期望的高度，所述行驶控制系统包括蓄能器装置和阀装置 连接在蓄能器装置，致动器装置和加压流体源之间，并且当处于提升模式时将蓄能器装置选择性地连接到致动器装置的升高端口，同时将负载保持在期望的高度。

公开(公告)号：US06955115B1

公开(公告)日：2005-10-18

申请号：US09464497

申请日：1999-12-15

Applicant: Michael A. A'Hearn ,  Thomas J. Hajek, Sr. ,  Larry W. Lorimor ,  Daniel T. Mather ,  Srikrishnan T. Tolappa

Inventor： Michael A. A'Hearn ,  Thomas J. Hajek, Sr. ,  Larry W. Lorimor ,  Daniel T. Mather ,  Srikrishnan T. Tolappa

IPC: F15B11/08 ,  E02F9/22 ,  F15B11/024 ,  F15B11/16

CPC classification number: F15B11/024 ,  E02F9/2203 ,  E02F9/2221 ,  E02F9/226 ,  E02F9/2285 ,  F15B11/16 ,  F15B2211/20576 ,  F15B2211/3051 ,  F15B2211/30515 ,  F15B2211/30525 ,  F15B2211/3058 ,  F15B2211/3111 ,  F15B2211/3144 ,  F15B2211/31576 ,  F15B2211/329 ,  F15B2211/6355 ,  F15B2211/7114 ,  F15B2211/75 ,  F15B2211/76 ,  F15B2211/78

Abstract: A fluid system is provided wherein two different fluid circuits are connected in parallel with a single source of pressurized fluid and the two fluid circuits can function together even when one of the loads is lighter than the other. This is accomplished by having the lightly loaded circuit having a directional control that when operated in one of its operative positions the flow from the rod end of the cylinder is directed through the directional control valve and combined with the supply flow being directed to the head end of the cylinder. With the other heavier loaded circuit also being actuated, the pressure of the fluid from the rod end of the fluid cylinder is equalized with the pressure of the heavier loaded circuit. Consequently, the speed of the heavier loaded circuit does not stall or slow down relative to the lightly loaded circuit. In the case of a machine having a bucket used for backdragging, the circuit needs a diverter system that provides protection from the cylinder rod of the fluid cylinder 26 from buckling during backdragging while maintaining the ability for pressure equalization when not performing a backdragging operation.

Abstract translation: 提供了一种流体系统，其中两个不同的流体回路与单个加压流体源并联连接，并且两个流体回路即使当其中一个负载比另一个轻一些时也可一起工作。 这是通过使轻载电路具有方向控制来实现的，当在其操作位置之一操作时，来自气缸的杆端的流动被引导通过方向控制阀并且与供给流相结合，引导到头端 的气缸。 在另一个较重的负载回路也被致动的情况下，来自流体缸的杆端的流体的压力与较重的负载回路的压力相等。 因此，较重负载电路的速度相对于轻载电路不会失速或减速。 在具有铲斗用于倒车的机器的情况下，电路需要一个分流器系统，该分流器系统在回扫过程中提供了防止液压缸26的气缸杆的弯曲作用，同时在不执行反向压缩操作的同时保持压力平衡的能力。

公开(公告)号：US06205781B1

公开(公告)日：2001-03-27

申请号：US09257774

申请日：1999-02-25

Applicant: Michael A. A'Hearn

Inventor： Michael A. A'Hearn

IPC: F16D3102

CPC classification number: B62D5/07 ,  E02F9/2239 ,  E02F9/2292 ,  F15B11/162 ,  F15B11/17 ,  F15B2211/20576 ,  F15B2211/3059 ,  F15B2211/329 ,  F15B2211/40515 ,  F15B2211/4053 ,  F15B2211/41527 ,  F15B2211/41536 ,  F15B2211/426 ,  F15B2211/428 ,  F15B2211/50518 ,  F15B2211/55 ,  F15B2211/6054 ,  F15B2211/71 ,  F15B2211/76 ,  F15B2211/78

Abstract: A fluid control system including a valve arrangement operable for selectively, controllably supplying pressurized fluid to a work element of the system from at least two pressurized fluid sources depending on load conditions on the pressurized fluid sources. The valve arrangement is operable for directing pressurized fluid from the first pressurized fluid source to the work element when a first or low load condition is present on the first pressurized fluid source and directing pressurized fluid from the second pressurized fluid source to the work element when a second or high load condition greater than the first load condition is present on the first pressurized fluid source and a low load condition is present on the second pressurized fluid source, such that operability of the work element and other work elements supplied by the pressurized fluid sources is maintained.

Abstract translation: 一种流体控制系统，包括阀装置，其可操作以根据加压流体源上的载荷条件从至少两个加压流体源选择性地可控地将加压流体供应到系统的工作元件。 当第一或低负载状态存在于第一加压流体源上时，阀装置可操作用于将加压流体从第一加压流体源引导到工件，当第一加压流体源处于第一加压流体源时，将加压流体从第二加压流体源导向工件 在第一加压流体源上存在大于第一负载条件的第二或高负载状态，并且在第二加压流体源上存在低负载状态，使得由加压流体源供应的工作元件和其它工作元件的可操作性 被维护。

公开(公告)号：US06173639B1

公开(公告)日：2001-01-16

申请号：US09307167

申请日：1999-05-07

Applicant: Michael A. A'Hearn ,  Thomas J. Hajek, Jr. ,  Srikrishnan T. Tolappa

Inventor： Michael A. A'Hearn ,  Thomas J. Hajek, Jr. ,  Srikrishnan T. Tolappa

IPC: F15B11024

CPC classification number: F15B11/003 ,  F15B2013/0413 ,  F15B2211/20576 ,  F15B2211/30515 ,  F15B2211/30525 ,  F15B2211/3116 ,  F15B2211/3127 ,  F15B2211/3144 ,  F15B2211/31529 ,  F15B2211/31541 ,  F15B2211/329 ,  F15B2211/40515 ,  F15B2211/413 ,  F15B2211/41581 ,  F15B2211/428 ,  F15B2211/46

Abstract: A fluid control circuit providing a float capability for a double-acting actuator having first and second actuating chambers is provided. The fluid circuit includes signal controlled load check valves disposed between the actuating chambers and a directional control valve. The directional control valve is movable from a centered, neutral position towards first and second operative positions and a float position. The directional control valve and the load check valves are cooperatively operable in one operable position to allow fluid flow from the first actuating chamber to the exhaust port, and fluid flow from the pump port to the second actuating chamber. In the float position of the directional control valve, both of the signal controlled load check valves are opened to allow open fluid flow between the first and second actuating chambers thus allowing the tool attached to the actuator to float.

Abstract translation: 提供了一种为具有第一和第二致动室的双作用致动器提供浮动能力的流体控制电路。 流体回路包括设置在致动室和方向控制阀之间的信号控制负载止回阀。 方向控制阀可从中心的中立位置朝向第一和第二操作位置以及浮动位置移动。 方向控制阀和负载止回阀在一个可操作的位置协作地可操作以允许流体从第一致动室流到排气口，并且流体从泵口流到第二致动室。 在方向控制阀的浮动位置，两个信号控制的负载止回阀被打开以允许第一和第二致动室之间的开放的流体流动，从而允许附接到致动器的工具浮动。