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1. 发明公开

US20240360848A1 DOUBLE ACTING HITCH HYDRAULIC VALVE ASSEMBLY 审中-公开
公开(公告)号：US20240360848A1
公开(公告)日：2024-10-31
申请号：US18498518
申请日：2023-10-31
申请人： Deere & Company
发明人： Michael A. Holland
IPC分类号： F15B11/028 , B60D1/62
CPC分类号： F15B11/028 , B60D1/62 , F15B2211/3056 , F15B2211/50509
摘要： One or more techniques and/or systems are disclosed for a hydraulic system that is used with a vehicle hitch, to raise and lower an implement attached to the hitch. The system has a lifting side, that raises the hitch, and a downforce side that applies downward pressure. Hydraulic actuators are used to apply the up or down force using supply lines coupled to both sides. A downforce pressure control valve controls an amount of hydraulic pressure is supplied to the downforce side. A mode select valve is fluidly coupled to the downforce pressure control valve and is used to select hitch operation between a double acting hitch position, a single acting hitch position, and a neutral position. A work port check valve is between the downforce side and the mode select valve to stop the fluid from flowing back into the system when de-energized or in the neutral position.

2. 发明授权

US09366272B2 Hydraulic system having low speed operation 有权
标题翻译：液压系统低速运行
公开(公告)号：US09366272B2
公开(公告)日：2016-06-14
申请号：US13963150
申请日：2013-08-09
申请人： Caterpillar Inc.
发明人： 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分类号： F15B15/02 , E02F9/08 , E02F9/22 , F16H61/433 , F16H61/465 , F01P7/04
CPC分类号： 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
摘要： 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.
摘要翻译：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。

3. 发明申请

US20090094973A1 HYDRAULIC CIRCUIT FOR HEAVY EQUIPMENT 有权
标题翻译：液压电路重型设备
公开(公告)号：US20090094973A1
公开(公告)日：2009-04-16
申请号：US12246515
申请日：2008-10-07
申请人： Hae Kyun CHEONG
发明人： Hae Kyun CHEONG
IPC分类号： F15B13/06
CPC分类号： F15B11/17 , E02F9/2228 , E02F9/2242 , E02F9/2292 , E02F9/2296 , F15B21/042 , F15B2211/20546 , F15B2211/20576 , F15B2211/3116 , F15B2211/41509 , F15B2211/428 , F15B2211/45 , F15B2211/50509 , F15B2211/575 , F15B2211/6343 , F15B2211/6355 , F15B2211/66 , F15B2211/7142
摘要： A hydraulic circuit for heavy equipment is disclosed, which utilizes a hydraulic fluid supplied from a hydraulic pump for driving a cooling fan, as a pilot signal pressure, without installing a separate constant displacement pilot pump for supplying the pilot signal pressure to a control valve for controlling the hydraulic fluid to be supplied to a working device such as a boom. The hydraulic circuit includes first to third hydraulic pumps connected to an engine; a first control valve installed in a flow path of the first hydraulic pump; a second control valve installed in a flow path of the second hydraulic pump; a hydraulic motor connected to the third hydraulic pump; a cooling fan, connected to the hydraulic motor, for discharging cooling wind to an oil cooler; a temperature sensor for detecting a temperature of the hydraulic fluid in the hydraulic tank; an electric relief valve, installed in a drain flow path of the third hydraulic pump, for variably controlling a rotation velocity of the cooling fan; a controller for controlling the hydraulic pressure that drives the hydraulic motor; and a pilot pressure generator, installed in a pilot flow path branched and connected to a flow path of the third hydraulic pump, for supplying a pilot signal pressure to the first and second control valves when shifting.
摘要翻译：公开了一种用于重型设备的液压回路，其利用从液压泵供应的用于驱动冷却风扇的液压流体作为先导信号压力，而不安装单独的恒定位移先导泵，以将先导信号压力提供给控制阀，控制要供应到诸如吊杆的工作装置的液压流体。液压回路包括连接到发动机的第一至第三液压泵; 安装在第一液压泵的流路中的第一控制阀; 安装在所述第二液压泵的流路中的第二控制阀; 连接到第三液压泵的液压马达; 冷却风扇，连接到液压马达，用于将冷却风排放到油冷却器; 温度传感器，用于检测液压缸中的液压流体的温度; 安装在所述第三液压泵的排水流路中的电气安全阀，用于可变地控制所述冷却风扇的转速; 用于控制驱动液压马达的液压的控制器; 以及先导式压力发生器，其安装在分支并连接到第三液压泵的流路的先导流路中，用于当换档时向第一和第二控制阀提供先导信号压力。

4. 发明授权

US4911192A Method of and apparatus for control of saftey valves 失效
标题翻译：控制安全阀的方法和装置
公开(公告)号：US4911192A
公开(公告)日：1990-03-27
申请号：US221458
申请日：1988-06-03
申请人： Johannes Hartfiel , Manfred Schmitt
发明人： Johannes Hartfiel , Manfred Schmitt
IPC分类号： F16K17/00 , F16K31/06 , F16K31/42 , G05D16/20
CPC分类号： G05D16/2093 , F15B19/002 , F16K17/02 , F16K31/1245 , F15B2211/50509 , F15B2211/50554 , F15B2211/5158 , F15B2211/5159 , F15B2211/527 , Y10T137/0396 , Y10T137/7761 , Y10T137/86389
摘要： A method of and apparatus for controlling a system safety valve comprising an operating cylinder for displacing a valve closing member, and in which outflow and inflow solenoid valves communicating with the operating cylinder for guiding hydraulic fluid out of and into the operating cylinder, respectively, are electronically controlled in accordance with the system pressure to enable stepwise opening or closing of the safety valve.
摘要翻译： PCT No.PCT / DE87 / 00446 Sec。 371日期：1988年6月3日 102（e）日期1988年6月3日PCT提交1987年10月1日PCT公布。出版物WO88 / 02510 日期：1988年4月7日。一种用于控制系统安全阀的方法和装置，包括用于移动阀关闭构件的操作气缸，并且其中与操作气缸连通的流出和流入电磁阀用于将液压流体引导到操作缸分别根据系统压力进行电子控制，以便能够逐步打开或关闭安全阀。

5. 发明申请

US20180161845A1 HYDRAULIC TOOL 审中-公开
公开(公告)号：US20180161845A1
公开(公告)日：2018-06-14
申请号：US15473984
申请日：2017-03-30
申请人： REFCO Manufacturing Ltd.
发明人： Manfred ULRICH , Ulrich DEMUTH
IPC分类号： B21D41/02 , F15B11/10 , F15B13/02 , F15B15/02 , F15B15/14
CPC分类号： B21D41/026 , B21D39/203 , B21D41/028 , B25B27/10 , F15B11/10 , F15B13/025 , F15B15/02 , F15B15/14 , F15B2211/20507 , F15B2211/50509 , F15B2211/523 , F15B2211/7052 , F15B2211/857
摘要： A hydraulic tool including a tank, which is filled with oil, a hand pump connected to the tank in fluid communication, having a spring-loaded lever mechanism, which is in operative connection with a pump piston, with a piston cylinder system as actuator, which is connected to the pump in fluid communication with a non-return valve, wherein the piston surface of the actuator is a multiple of the piston surface of the hand pump.

6. 发明授权

US09919907B2 Method for controlling a combined rotary/push movement 有权
公开(公告)号：US09919907B2
公开(公告)日：2018-03-20
申请号：US14830837
申请日：2015-08-20
申请人： JUNGHEINRICH AKTIENGESELLSCHAFT
发明人： Bernhard Hagl
IPC分类号： B66F9/07 , B66F9/22 , B66F9/14 , F15B11/00 , F15B11/16
CPC分类号： B66F9/22 , B66F9/07 , B66F9/147 , F15B11/003 , F15B11/161 , F15B2211/50509
摘要： The invention relates to a method and device for controlling a combined rotary/push movement of a load-receiving means of an industrial truck, in particular a three-way stacker, both the rotary movement and the push movement being brought about by means of respective hydraulic elements (32, 34), which are supplied with hydraulic fluid by a single hydraulic pump (22) which is driven by an associated pump motor (24), and a performance characteristic of the hydraulic pump (22) being controlled according to a predetermined progression over time during the rotary/push movement; the industrial truck comprising a valve assembly (30) which is designed to be operated such that, below a threshold value for the hydraulic pressure provided by the hydraulic pump (22), only the rotary movement of the load-receiving means is brought about, while, above the threshold value, both the rotary movement and the push movement are brought about. Here, sensor means (36a, 36b) are provided which detect a temperature of the pump motor (24) and/or of the hydraulic pump (22), and the predetermined progression over time of the performance characteristic of the hydraulic pump (22) during the rotary/push movement is adapted according to a predetermined relationship depending on the temperature of the pump motor (24) and/or of the pump (22) detected by the sensor means (36a, 36b).

7. 发明授权

US09541101B2 Hydraulic drive 有权
标题翻译：液压驱动
公开(公告)号：US09541101B2
公开(公告)日：2017-01-10
申请号：US14453874
申请日：2014-08-07
申请人： HAWE HYDRAULIK SE
发明人： Georg Aneder , Engelbert Zwingler
IPC分类号： F16D31/02 , F15B13/02 , F15B13/04 , F15B11/10 , F15B11/042 , F16H61/4078 , B25B27/10 , F15B11/028 , F15B13/042 , F15B11/15
CPC分类号： F15B13/028 , B25B27/10 , F15B11/028 , F15B11/0423 , F15B11/10 , F15B11/15 , F15B13/0401 , F15B13/0405 , F15B13/0426 , F15B2211/31558 , F15B2211/329 , F15B2211/40507 , F15B2211/41572 , F15B2211/50509 , F15B2211/5159 , F15B2211/528 , F15B2211/55 , F15B2211/7052 , F15B2211/76 , F16H61/4078 , Y10T137/7758
摘要： In a hydraulic drive of a tool, a piston is adapted to be acted upon by a pump via a pressure limiting seat valve and a parallel switching seat valve of a valve arrangement. A restriction is provided in a pressure line upstream of the pressure limiting seat valve which is connected to a tank on the flow-off side. A drain line leads from a working chamber of the piston via the switching seat valve to the tank. A closing side is adapted to be acted upon by pressure and an opening side is adapted to be acted upon by a force generated when the pressure limiting seat valve responds. The pump is adapted to be switched off when the maximum operating pressure has been reached, so that the piston will execute a return stroke. A pressure-increasing restriction is provided on the flow-off side of the pressure limiting seat valve.
摘要翻译：在工具的液压驱动中，活塞适于通过泵通过压力限制座阀和阀装置的并联开关座阀来作用。在限流座阀的上游的压力线上设置限制，该限压座阀连接到流出侧的罐。排水管通过开关座阀从活塞的工作室引导到罐。闭合侧适于通过压力作用，并且开口侧适于由压力限制阀阀响应时产生的力作用。当达到最大工作压力时，该泵适于关闭，以便活塞将执行返回行程。在限压座阀的流出侧设置增压限制。

8. 发明授权

US3848620A Fluid pressure modulator and system 失效
标题翻译：流体压力调节器和系统
公开(公告)号：US3848620A
公开(公告)日：1974-11-19
申请号：US36020373
申请日：1973-05-14
申请人： CLARK EQUIPMENT CO
发明人： FISHER J , ZELLER B
IPC分类号： G05D16/10 , F15B11/02 , F16D48/02 , F16D48/04 , F16K31/12
CPC分类号： F15B11/022 , F15B2211/30525 , F15B2211/31588 , F15B2211/324 , F15B2211/35 , F15B2211/50509 , F15B2211/513 , F15B2211/5153 , F15B2211/528 , F15B2211/55 , F15B2211/56 , F15B2211/625 , F15B2211/71 , F15B2211/7107 , F15B2211/7121 , F15B2211/7135 , F15B2211/775 , F15B2211/8606 , F16D25/14 , F16D48/02 , F16D48/04 , F16D2048/0203 , F16D2048/0209 , Y10T137/2607
摘要： A pressure modulator which upon the application of pressurized fluid achieves a gradual increase to line pressure instead of an abrupt increase. When pressure is applied initially a spool moves and uncovers vent which because of its discharge or bleeding off of fluid produces a low pressure. At the same time, fluid flows through a restricted passageway to an accumulator, and as the pressure builds up in the accumulator it moves the spool back toward its initial position, causing a gradual increase in the pressure. The pressure modulator has characteristics which are particularly advantageous for use in a system for operating a fluid pressure actuated clutch.
摘要翻译：压力调节器在施加加压流体时实现逐渐增加到管路压力而不是突然增加。当最初施加压力时，阀芯移动并露出排气口，由于其排放或流体流出会产生低压。同时，流体通过限制通道流到蓄能器，并且当压力积聚在蓄能器中时，其将线轴移回其初始位置，导致压力逐渐增加。压力调节器具有特别有利于用于操作流体压力致动离合器的系统。

9. 发明授权

US3459071A Transmission control 失效
标题翻译：传输控制
公开(公告)号：US3459071A
公开(公告)日：1969-08-05
申请号：US3459071D
申请日：1968-02-05
申请人： GEN MOTORS CORP
发明人： SCHAEFER ROBERT H
IPC分类号： F15B11/02 , F16H61/02 , F16H57/10
CPC分类号： F15B11/02 , F15B2211/20538 , F15B2211/30505 , F15B2211/30525 , F15B2211/3056 , F15B2211/31547 , F15B2211/324 , F15B2211/40507 , F15B2211/41527 , F15B2211/455 , F15B2211/50509 , F15B2211/50536 , F15B2211/5151 , F15B2211/555 , F15B2211/57 , F15B2211/6355 , F15B2211/7052 , F15B2211/7053 , F15B2211/71 , F15B2211/78 , F15B2211/782 , F16H61/0262 , F16H2716/06 , Y10T137/7782 , Y10T137/86718

10. 发明授权

US11680386B2 Hydraulic system for working machine 有权
公开(公告)号：US11680386B2
公开(公告)日：2023-06-20
申请号：US17539478
申请日：2021-12-01
申请人： KUBOTA CORPORATION
发明人： Yuji Fukuda , Keigo Honda
IPC分类号： F15B11/16 , E02F9/22 , E02F9/20 , F15B11/044
CPC分类号： E02F9/2282 , E02F9/2004 , E02F9/2225 , E02F9/2267 , E02F9/2271 , F15B11/044 , F15B11/16 , F15B2211/20546 , F15B2211/3116 , F15B2211/3133 , F15B2211/46 , F15B2211/50509 , F15B2211/5153 , F15B2211/5156 , F15B2211/555 , F15B2211/71 , F15B2211/7741 , F15B2211/88
摘要： A hydraulic system includes a hydraulic pump, a first hydraulic actuator, a second hydraulic actuator, a first control valve to control the first hydraulic actuator, a second control valve to control the second hydraulic actuator, a pressure increasing portion to increasing a pressure of the operation fluid, a first discharge fluid tube connected to any one of the first control valve and the second control valve and connected to the pressure increasing portion, a second discharge fluid tube connected to the first discharge fluid tube and configured to discharge the operation fluid, a float switching valve having an allowance position, a prevention position, and a float position, the allowance position blocking the second discharge fluid tube and allowing the operation fluid to flow to the pressure increasing portion, the prevention position unblocking the second discharge fluid tube and preventing the operation fluid from flowing to the pressure increasing portion.

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