公开(公告)号：US20160061280A1

公开(公告)日：2016-03-03

申请号：US14473124

申请日：2014-08-29

Applicant: Caterpillar Inc.

Inventor： Carl McIlheran ,  Andrew J. Kleitsch ,  John C. Vacca ,  Daniel Mather ,  Michael D. Hudson ,  Derek W. Holmes

IPC: F16D65/78

CPC classification number: F16D65/78 ,  B60T5/00 ,  F15B21/042 ,  F15B2211/50518 ,  F15B2211/5156 ,  F15B2211/611 ,  F15B2211/62 ,  F16D2065/783

Abstract: A relief valve in a hydraulic system in a machine selectively sends pressurized oil to both a brake cooling apparatus and a cylinder used to hoist a load. A relief valve lowers pressure spikes in a brake cooling line by dumping fluid in a brake cooling line to tank responsive to a pressure spikes at the head end of the cylinder during hoisting or other transitions in the hydraulic system. Reducing the pressure spikes in the brake cooling line improves reliability of the brake cooling apparatus by protecting seals from undue stresses.

Abstract translation: 机器中的液压系统中的安全阀选择性地将加压油输送到制动冷却装置和用于提升负载的气缸。 安全阀通过在液压系统的提升或其它过渡期间，响应于缸体头端处的压力尖峰而将制冷剂冷却管路中的流体倾倒在制动冷却管线中，降低了压力尖峰。 减少制动冷却线中的压力尖峰通过保护密封件免受不适当的应力而提高制动器冷却装置的可靠性。

公开(公告)号：US10273962B2

公开(公告)日：2019-04-30

申请号：US15275784

申请日：2016-09-26

Applicant: Caterpillar Inc.

Inventor： Edward William Mate ,  Michael D. Hudson

IPC: F04D25/04 ,  F16H61/4035 ,  F16H61/4148 ,  F01P7/04

Abstract: A hydraulic system is provided to selectively and independently route pressurized fluid to one or more operational systems of a machine. The hydraulic system is capable of switching fluid flow in operation from one of the operational systems to another of the operational systems in the event of hydraulic drive power being required by the latter one of the operational systems. The hydraulic system is also configured to continue supplying a nominal amount of fluid to support one or more auxiliary functions, for example, a lubrication system for bearings associated with the former one of the operational systems while routing the pressurized fluid to the latter one of the operational systems. A recirculation and anti-cavitation arrangement is also provided to allow recirculation of fluid to a hydraulic motor in the former one of the operational systems when pressurized fluid is being routed to the latter one of the operational systems.

公开(公告)号：US09869359B2

公开(公告)日：2018-01-16

申请号：US14473124

申请日：2014-08-29

Applicant: Caterpillar Inc.

Inventor： Carl McIlheran ,  Andrew J. Kleitsch ,  John C. Vacca ,  Daniel Mather ,  Michael D. Hudson ,  Derek W. Holmes

IPC: F16D65/78 ,  B60T5/00 ,  F15B21/04

CPC classification number: F16D65/78 ,  B60T5/00 ,  F15B21/042 ,  F15B2211/50518 ,  F15B2211/5156 ,  F15B2211/611 ,  F15B2211/62 ,  F16D2065/783

Abstract: A relief valve in a hydraulic system in a machine selectively sends pressurized oil to both a brake cooling apparatus and a cylinder used to hoist a load. A relief valve lowers pressure spikes in a brake cooling line by dumping fluid in a brake cooling line to tank responsive to a pressure spikes at the head end of the cylinder during hoisting or other transitions in the hydraulic system. Reducing the pressure spikes in the brake cooling line improves reliability of the brake cooling apparatus by protecting seals from undue stresses.

公开(公告)号：US20170009783A1

公开(公告)日：2017-01-12

申请号：US15275784

申请日：2016-09-26

Applicant: Caterpillar Inc.

Inventor： Edward William Mate ,  Michael D. Hudson

IPC: F15B13/04 ,  F04D25/04 ,  F15B1/26 ,  F15B11/08 ,  F15B13/044

CPC classification number: F04D25/04 ,  F01P7/044 ,  F15B2211/40507 ,  F15B2211/40592 ,  F15B2211/411 ,  F15B2211/41572 ,  F15B2211/7058 ,  F15B2211/7135 ,  F15B2211/7142 ,  F16H61/4035 ,  F16H61/4148

Abstract: A hydraulic system is provided to selectively and independently route pressurized fluid to one or more operational systems of a machine. The hydraulic system is capable of switching fluid flow in operation from one of the operational systems to another of the operational systems in the event of hydraulic drive power being required by the latter one of the operational systems. The hydraulic system is also configured to continue supplying a nominal amount of fluid to support one or more auxiliary functions, for example, a lubrication system for bearings associated with the former one of the operational systems while routing the pressurized fluid to the latter one of the operational systems. A recirculation and anti-cavitation arrangement is also provided to allow recirculation of fluid to a hydraulic motor in the former one of the operational systems when pressurized fluid is being routed to the latter one of the operational systems.

Abstract translation: 提供液压系统以选择性地和独立地将加压流体路由到机器的一个或多个操作系统。 在后一种操作系统需要液压驱动力的情况下，液压系统能够将操作中的一个操作系统的流体流切换到另一个操作系统。 液压系统还构造成继续供应标称量的流体以支持一个或多个辅助功能，例如用于与前一个操作系统相关联的轴承的润滑系统，同时将加压流体路由到 操作系统。 还提供了再循环和抗气蚀装置，以便当加压流体被路由到后一个操作系统时，允许流体再循环到前一个操作系统中的液压马达。

公开(公告)号：US09366272B2

公开(公告)日：2016-06-14

申请号：US13963150

申请日：2013-08-09

Applicant: Caterpillar Inc.

Inventor： Susan E. Bieker ,  Eric P. Jakubiak ,  Dennis R. Barber ,  John J. Kaufman ,  Edward W. Mate ,  Scott D. Vollmer ,  Michael D. Hudson ,  Moses I. Akpan

IPC: F15B15/02 ,  E02F9/08 ,  E02F9/22 ,  F16H61/433 ,  F16H61/465 ,  F01P7/04

CPC classification number: F15B15/02 ,  E02F9/0866 ,  E02F9/0875 ,  E02F9/226 ,  F01P7/044 ,  F15B2211/40515 ,  F15B2211/40592 ,  F15B2211/41581 ,  F15B2211/46 ,  F15B2211/50509 ,  F15B2211/605 ,  F16H61/433 ,  F16H61/465

Abstract: A hydraulic fan circuit is provided. The hydraulic fan circuit includes a tank, a motor having a fluid inlet and a fluid outlet and a pump to draw fluid at a low pressure from the tank and discharge the fluid at elevated pressures to the motor via the fluid inlet. The hydraulic fan circuit further includes a directional control valve disposed between the fluid outlet of the motor and the tank. The directional control valve is operable to move between a flow blocking position and a flow passing position. Further, the directional control valve is configured to reduce a positive speed of the motor below a lowest positive speed attainable through control of pump output. Furthermore, the hydraulic fan circuit includes a pressure control circuit configured to provide a pilot fluid flow at varying pressure to move the directional control valve.

Abstract translation: 提供液压风扇电路。 液压风扇回路包括油箱，具有流体入口和流体出口的马达和用于从罐中抽取低压的流体并经由流体入口将流体以升高的压力排出到马达的泵。 液压风扇回路还包括设置在电动机的流体出口和罐之间的方向控制阀。 方向控制阀可操作以在阻流位置和流动通过位置之间移动。 此外，方向控制阀被配置为将电动机的正转速降低到通过控制泵输出可获得的最低正向速度。 此外，液压风扇回路包括压力控制回路，该压力控制回路构造成在变化的压力下提供先导流体流动以移动方向控制阀。

公开(公告)号：US09878737B2

公开(公告)日：2018-01-30

申请号：US14627887

申请日：2015-02-20

Applicant: Caterpillar Inc.

Inventor： Carl McIlheran ,  David A. Mork ,  Daniel T. Mather ,  Christopher W. Johnson ,  Michael D. Hudson

IPC: B62D5/065 ,  B62D5/07 ,  B62D5/093

CPC classification number: B62D5/093 ,  B62D5/065 ,  B62D5/075 ,  F15B2211/212

Abstract: A hydraulic fluid supply portion of a hydraulic steering control system may include an accumulator holding a quantity of pressurized steering fluid, and a priority valve. The priority valve may have a priority supply inlet port fluidly connected to the accumulator for receiving pressurized steering fluid from the accumulator, and a priority supply outlet port fluidly connected to a steering flow amplifier circuit. The priority valve may have a normally open position with a minimal pressure drop between the priority supply inlet port and the priority supply outlet port, and a flow restriction position where fluid flow between the ports is restricted. A load signal line from a steering control circuit to the priority valve may bias the priority valve toward the normally open position in response to an operator steering command to provide pressurized steering fluid to the steering flow amplifier circuit.

公开(公告)号：US20160244090A1

公开(公告)日：2016-08-25

申请号：US14627887

申请日：2015-02-20

Applicant: Caterpillar Inc.

Inventor： Carl McIlheran ,  David A. Mork ,  Daniel T. Mather ,  Christopher W. Johnson ,  Michael D. Hudson

IPC: B62D5/065 ,  B62D5/06 ,  F16K3/24 ,  B62D5/087

CPC classification number: B62D5/093 ,  B62D5/065 ,  B62D5/075 ,  F15B2211/212

Abstract: A hydraulic fluid supply portion of a hydraulic steering control system may include an accumulator holding a quantity of pressurized steering fluid, and a priority valve. The priority valve may have a priority supply inlet port fluidly connected to the accumulator for receiving pressurized steering fluid from the accumulator, and a priority supply outlet port fluidly connected to a steering flow amplifier circuit. The priority valve may have a normally open position with a minimal pressure drop between the priority supply inlet port and the priority supply outlet port, and a flow restriction position where fluid flow between the ports is restricted. A load signal line from a steering control circuit to the priority valve may bias the priority valve toward the normally open position in response to an operator steering command to provide pressurized steering fluid to the steering flow amplifier circuit.

Abstract translation: 液压转向控制系统的液压流体供应部分可以包括保持一定数量的加压转向流体的蓄能器和优先阀。 优先阀可以具有流体地连接到蓄能器的优先供应入口端口，用于从蓄能器接收加压的转向流体，以及流体地连接到转向流量放大器电路的优先供应出口端口。 优先阀可以具有在优先供应入口和优先供应出口之间具有最小压力降的常开位置，以及限制端口之间的流体流动的流量限制位置。 从转向控制电路到优先阀的负载信号线可以响应于操作者转向命令将优先阀偏压到常开位置，以将加压的转向流体提供给转向流量放大器电路。

公开(公告)号：US20150040548A1

公开(公告)日：2015-02-12

申请号：US13963150

申请日：2013-08-09

Applicant: Caterpillar Inc.

Inventor： Susan E. Bieker ,  Eric P. Jakubiak ,  Dennis R. Barber ,  John J. Kaufman ,  Edward W. Mate ,  Scott D. Vollmer ,  Michael D. Hudson ,  Moses I. Akpan

IPC: F15B15/02

CPC classification number: F15B15/02 ,  E02F9/0866 ,  E02F9/0875 ,  E02F9/226 ,  F01P7/044 ,  F15B2211/40515 ,  F15B2211/40592 ,  F15B2211/41581 ,  F15B2211/46 ,  F15B2211/50509 ,  F15B2211/605 ,  F16H61/433 ,  F16H61/465

Abstract: A hydraulic fan circuit is provided. The hydraulic fan circuit includes a tank, a motor having a fluid inlet and a fluid outlet and a pump to draw fluid at a low pressure from the tank and discharge the fluid at elevated pressures to the motor via the fluid inlet. The hydraulic fan circuit further includes a directional control valve disposed between the fluid outlet of the motor and the tank. The directional control valve is operable to move between a flow blocking position and a flow passing position. Further, the directional control valve is configured to reduce a positive speed of the motor below a lowest positive speed attainable through control of pump output. Furthermore, the hydraulic fan circuit includes a pressure control circuit configured to provide a pilot fluid flow at varying pressure to move the directional control valve.

Abstract translation: 提供液压风扇电路。 液压风扇回路包括油箱，具有流体入口和流体出口的马达和用于从罐中抽取低压的流体并经由流体入口将流体以升高的压力排出到马达的泵。 液压风扇回路还包括设置在电动机的流体出口和罐之间的方向控制阀。 方向控制阀可操作以在阻流位置和流动通过位置之间移动。 此外，方向控制阀被配置为将电动机的正转速降低到通过控制泵输出可获得的最低正向速度。 此外，液压风扇回路包括压力控制回路，该压力控制回路构造成在变化的压力下提供先导流体流动以移动方向控制阀。