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公开(公告)号：EP1223346A1
公开(公告)日：2002-07-17
申请号：EP01124940.6
申请日：2001-10-19
Applicant: Caterpillar Inc.
CPC classification number: E02F9/2004 , F15B11/20 , F15B11/22 , F15B13/06 , Y10T137/87072 , Y10T137/87193
Abstract: A joystick controller is provided in a hydraulic circuit having a pair of hydraulic actuators and oriented with respect to the operator so that movement of a control lever of the joystick controller relative to a reference axis oriented perpendicular to the operator results in control signals being generated and delivered to the first and second main control valves so that the respective cylinders are moved in a direction that is intuitive to the operator. For example, forward movement of the control lever results in both hydraulic actuators moving in the same forward or downward direction and movement of the control lever rearwardly results in both actuators moving in the rearward or upward direction. Likewise, movement of the control lever along an axis that is oriented forty five degrees from the reference axis results in control of one of the actuators independent of the other one.
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公开(公告)号：EP0565645B1
公开(公告)日：1996-09-04
申请号：EP92909590.9
申请日：1991-01-22
Applicant: CATERPILLAR INC.
Inventor： BUDZICH, Tadeusz
CPC classification number: F15B11/08 , E02F9/226 , F15B11/165 , F15B21/047 , F15B2211/20546 , F15B2211/20584 , F15B2211/30505 , F15B2211/30525 , F15B2211/3111 , F15B2211/3144 , F15B2211/31576 , F15B2211/327 , F15B2211/329 , F15B2211/351 , F15B2211/50536 , F15B2211/5158 , F15B2211/5159 , F15B2211/526 , F15B2211/55 , F15B2211/6052 , F15B2211/6346 , F15B2211/635 , F15B2211/7053 , F15B2211/71 , Y10T137/87193 , Y10T137/87233 , Y10T137/87241
Abstract: Fluid systems having fluid motors which control aiding type loads many times have problems with cavitation in one end of the fluid type motor during lowering thereof. It is desirable to eliminate all cavitation in the fluid motor during operation. In order to eliminate cavitation during lowering of an aiding type load and to provide a positive pressure therein, the subject arrangement provides an exhaust pressurizing control (184) for use in a fluid system (10). The exhaust pressurizing control (184) includes an exhaust manifold means (80) having selector means (88) to provide a positive pressure in the exhaust manifold means (80) during lowering of an aiding type load (W1). The selector means (88) includes pressure limiting and unloading means (90) operative to provide a positive pressure in the exhaust manifold means (80) during lowering of the aiding type load (W1) and to unload the pressurized fluid in the exhaust manifold means (80) during raising of a resisting type load (W1). The pressurized fluid in the exhaust manifold means (80) is available to the fluid motor (16) through anti-cavitational valve means (109). This arrangement effectively eliminates cavitation in the fluid motor (16).
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公开(公告)号：EP0231577B1
公开(公告)日：1990-04-11
申请号：EP86306613.0
申请日：1986-08-27
Applicant: Yankoff, Gerald K.
Inventor： Yankoff, Gerald K.
CPC classification number: F16K11/0853 , B05B1/1645 , B05B15/658 , Y10T137/86485 , Y10T137/86871
Abstract: A flow control apparatus for selectively directing fluid from a fluid supply line to a number of outlet lines includes an outer member having an outer wall, a throughbore forming an annular inner wall and a plurality of spaced, discharge bores formed therebetween. An inner member having an annular outer wall is received within the throughbore of the outer member so that their annular walls face one another. The outer member is rotatable with respect to the inner member to selectively align each of its discharge bores with the fluid passageway of the inner member, and an interlock mechanism is provided to ensure accurate alignment therebetween. The facing surfaces of the inner and outer members are sealed at the fluid passageway by a Teflon seal mounted at one end of a driven piston which is axially movable within the fluid passageway. A second, driver piston is operable to force the driven piston axially toward the outer member so that the Teflon seal is compressed between the facing surfaces of the inner and outer members to prevent fluid leakage at the fluid passageway and an aligning discharge bore.
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公开(公告)号：EP0231577A1
公开(公告)日：1987-08-12
申请号：EP86306613.0
申请日：1986-08-27
Applicant: Yankoff, Gerald K.
Inventor： Yankoff, Gerald K.
CPC classification number: F16K11/0853 , B05B1/1645 , B05B15/658 , Y10T137/86485 , Y10T137/86871
Abstract: A flow control apparatus for selectively directing fluid from a fluid supply line to a number of outlet lines includes an outer member (14) having an outer wall, a throughbore forming an annular inner wall (24) and a plurality of spaced, discharge bores (28) formed therebetween, and an inner member (12) having an annular outer wall (34) received within the throughbore of the outer member so that their annular walls face one another. The outer member is rotatable with respect to the inner member to selectively align each of its discharge bores with the fluid passageway (38) of the inner member, and an interlock mechanism (84) is provided to ensure accurate alignment therebetween. The facing surfaces of the inner and outer members are sealed at the fluid passageway by a seal (64) mounted at one end of a driven piston (42) which is axially movable within the fluid passageway.
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公开(公告)号：EP0207075A4
公开(公告)日：1987-04-28
申请号：EP85900938
申请日：1985-02-07
Applicant: CATERPILLAR INC
Inventor： BLAKE WILLIAM W
CPC classification number: F16H61/065 , F16D48/0206 , F16D2048/0281 , F16D2500/10412 , F16D2500/50239 , F16D2500/5106 , F16D2500/70217 , F16D2500/70235 , F16D2500/70406
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Patent Agency Ranking16.发明授权
公开(公告)号：EP0026972B1
公开(公告)日：1984-10-24
申请号：EP80302847.1
申请日：1980-08-18
Applicant: EATON CORPORATION
Inventor： Yip, James Kwok-fun
CPC classification number: B62D5/07 , B60T13/141
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18.发明公开Hydraulic piloting device for remote control 失效Hydraulische VorsteuervorrichtungfürFernsteuerungen。
公开(公告)号：EP0089447A2
公开(公告)日：1983-09-28
申请号：EP82830066.5
申请日：1982-03-22
Applicant: Ditta HIDROBEN Spa
Inventor： Mor, Pietro
IPC: F15B13/06
CPC classification number: F15B13/0422
Abstract: For special employ in hydraulic contrivances such as: distributors, driving cylinders and for the hydraulic regulation of pumps and motors with changing capacity, the device permits an exact proportionality between shifting of the control lever and the pressure wanted by the users. In stationary position of the lever, the delivery ducts to the users are connected with a drain duct by means of an insertion fitted in the device body.
The lever fulcrum is fitted on a head lever bearer supported on a wrist joint. By shifting the lever, a pusher is driven which presses a supporting spring giving rise to a displacement downwards of a small rod. In this way, through an annular chamber, the feeding pressure is set into communication with a bore leading to one of the users. This is possible because the annular chamber is communicating through a radial bore with two axial bores leading to another annular chamber and allows in this way to get a pressure in the use zone lower than the feeding one and proportional to the span opened by the small rod.
To the span reduction a spring is opposing, the shiffness of which is proportional to the lever displacement which is acting on the pusher. In the device, similar operation departments with rod are foreseen proportionally to the number of the use ducts which can be acted on by changing the lever movement.Abstract translation: 对于特殊应用于液压设备，例如：分配器，驱动气缸，以及具有变化能力的泵和电机的液压调节，该装置允许控制杆移动和用户想要的压力之间的精确比例。 在杠杆的固定位置，通过插入装置主体中的插入件将与使用者的输送管道连接到排水管道。 杠杆支点安装在支撑在腕关节上的头杆支架上。 通过移动杠杆，驱动推动器，该推动器按压支撑弹簧，引起小杆向下的位移。 以这种方式，通过环形室，进料压力被设置成与通向其中一个使用者的孔连通。 这是可能的，因为环形室通过具有两个通向另一个环形室的轴向孔的径向孔连通，并且允许以这种方式在使用区域中获得比馈送区域低的压力，并且与由小杆打开的跨度成比例 。 对于跨度减小，弹簧是相反的，其刚度与作用在推动器上的杠杆位移成比例。 在该装置中，具有杆的类似的操作部门可以通过改变杠杆运动而与可以起作用的使用管道的数量成比例地设置。
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公开(公告)号：EP0039247A3
公开(公告)日：1982-04-28
申请号：EP81301900
申请日：1981-04-30
Applicant: Chubb Fire Security Limited
Inventor： Evans, John Lawrence , Entwistle, Richard Thomas
CPC classification number: F15B13/042 , A62C31/24 , F15B13/0405
Abstract: An hydraulic control system, particularly for controlling the movements about two axes of the nozzle of a fire fighting monitor. The supplies of working fluid, preferably water, from a source 18 to two double-acting actuators 58, 9 provided for. this purpose are controlled by four pilot operated control valves 13-16 fed with hydraulic pressures signals, transmitted through a different fluid, from a remote hand-operated pressure generator23. The transmission of signal pressures to the control valves may be effected via long lengths of flexible plastics tubing 27A-27D filled with the signal fluid and in order to avoid problems with the propagation of pressure changes through such tubing due to its inherent elasticity, the range of signal pressures to which each control valve is adapted to respond is selected to be at a relatively high level as compared with the pressure of the working fluid.
Abstract translation: 一种液压控制系统，特别用于控制消防监视器喷嘴两个轴线的运动。 从源18向两个双作用致动器58,9提供的工作流体，优选水的供应由四个先导操作的控制阀13-16控制，该控制阀13-16供给通过不同流体传送的液压信号 远程手动压力发生器23.信号压力传递到控制阀可以通过填充有信号流体的长长度的柔性塑料管道27A-27D来实现，并且为了避免压力变化传播通过这样的问题 由于其固有的弹性，每个控制阀适于响应的信号压力的范围被选择为与工作流体的压力相比处于相对高的水平。
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公开(公告)号：EP4310263A3
公开(公告)日：2024-04-10
申请号：EP23215548.1
申请日：2016-08-15
Applicant: Parker-Hannifin Corporation
Inventor： WHITE, Nicholas , HOWLAND, James , ZHANG, Hao , CARL, Blake
Abstract: A hydraulic system for a mobile construction vehicle (10), comprising a variable displacement track motor (60a, 60b) configured to be coupled to a track of the mobile construction vehicle (10) to drive the track, an accumulator (30) for storing pressurized hydraulic fluid for use as a power supply to a non-track load implement (14),a pump (54, 56) dedicated to the track motor (60a, 60b) and control valving (58a, 58b) that is operable between a first position at which the control valving (58a, 58b) directs hydraulic fluid from the dedicated pump (54, 56) to the variable displacement track motor (60a, 60b) to drive the variable displacement track motor (60a, 60b), and a second position at which the control valving (58a, 58b) directs hydraulic fluid from the dedicated pump (54, 56) to the accumulator (30).
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