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51. 发明授权

US3744375A Fluid system 失效
标题翻译：流体系统
公开(公告)号：US3744375A
公开(公告)日：1973-07-10
申请号：US3744375D
申请日：1971-08-09
申请人： KUBIK P
发明人： KUBIK P
IPC分类号： F15B1/02 , F15B11/036 , F15B11/046 , F01B31/00 , F15B11/00
CPC分类号： F15B1/02 , F15B11/036 , F15B11/046 , F15B2211/20553 , F15B2211/30505 , F15B2211/30515 , F15B2211/30525 , F15B2211/329 , F15B2211/355 , F15B2211/50518 , F15B2211/50527 , F15B2211/5154 , F15B2211/613 , F15B2211/615 , F15B2211/6336 , F15B2211/6355 , F15B2211/7053 , F15B2211/7055
摘要： A fluid system having a variable displacement fluid pump connected in a closed loop circuit to a fluid cylinder having a tubular member and a piston reciprocally mounted therein. The piston has a connecting rod extending from one side thereof and externally of the fluid cylinder. A second piston, fixedly attached to the tubular member, is reciprocally mounted within a blind bore in the connecting rod, with the outer face of the second piston and the blind end of the connecting rod defining an expansible pressure chamber. The effective pressure responsive areas of the two pistons are equal, such that when fluid at a selected rate of flow and at a predetermined pressure is communicated to the annular area on the rod side of the first piston, a force of a predetermined magnitude is generated against the piston to cause a contraction of the fluid cylinder at a predetermined rate, and when fluid at the same rate of flow and at the same predetermined pressure is communicated to the expansible chamber, a force of the same predetermined magnitude is generated between the second piston and the blind end of the connecting rod to cause an expansion of the fluid cylinder at the same predetermined rate as when the fluid cylinder is contracted. A directional control valve, disposed in the closed circuit between the inlet and outlet of the fluid pump, is adapted to selectively direct fluid to the rod side of the first piston within the fluid cylinder, while exhausting fluid from the expansible chamber and vice versa, so as to selectively expand and contract the fluid cylinder at the same rate. The rate of movement of expansion and contraction is controlled by the amount of fluid displaced by the fluid pump. A second directional control valve is adapted to direct fluid from a second source of fluid to a pressure responsive displacement control mechanism to selectively vary the displacement of the fuid pump. The rate of fluid flow to the pressure responsive displacement control mechanism is selectively varied to control the rate of displacement of the fluid pump and to thereby selectively control the rate of expansion and contraction of the fluid cylinder. When the side of the first piston opposite the rod carrying side thereof is communicated to a fluid under pressure, an additional expansion force may be selectively provided.

52. 发明授权

US3653208A Fluid system 失效
标题翻译：流体系统
公开(公告)号：US3653208A
公开(公告)日：1972-04-04
申请号：US3653208D
申请日：1970-06-26
申请人： PHILIP A KUBIK
发明人： KUBIK PHILIP A
IPC分类号： F15B1/02 , F15B11/036 , F15B11/046 , F15B15/18
CPC分类号： F15B11/036 , F15B1/02 , F15B11/046 , F15B2211/20553 , F15B2211/30505 , F15B2211/30525 , F15B2211/329 , F15B2211/355 , F15B2211/50527 , F15B2211/5154 , F15B2211/613 , F15B2211/615 , F15B2211/6336 , F15B2211/6355 , F15B2211/7053
摘要： A fluid system having a variable displacement fluid pump connected in a closed loop circuit to a fluid cylinder having a piston and a pair of connecting rods extending from opposite sides of the piston externally of the fluid cylinder. A directional control valve disposed in the closed circuit between the inlet and outlet of the fluid pump is adapted to selectively direct fluid to one side of the piston within the fluid cylinder, while exhausting fluid from the other side of the piston, so as to selectively move the piston within the fluid cylinder. The rate of movement of the piston in either direction of movement is controlled by the amount of fluid displaced by the fluid pump. A second directional control valve is adapted to direct fluid from a second source of fluid to a pressure responsive displacement control mechanism to selectively vary the displacement of the fluid pump. The rate of fluid flow to the pressure responsive displacement control mechanism is selectively varied to control the rate of displacement of the fluid pump and to thereby selectively control the rate of movement of the cylinder piston.
摘要翻译：一种具有可变排量流体泵的流体系统，该可变排量流体泵连接在具有活塞的流体缸的闭环回路中，以及从流体缸的外部的活塞的相对侧延伸的一对连接杆。设置在流体泵的入口和出口之间的闭合回路中的方向控制阀适于选择性地将流体引导到流体缸内的活塞的一侧，同时从活塞的另一侧排出流体，以便选择性地将活塞移动到液压缸内。活塞在两个运动方向的移动速度由流体泵移动的流体的量来控制。

53. 发明授权

US3217726A Transmission control system employing a differential check valve 失效
标题翻译：变速箱控制系统采用差速止回阀
公开(公告)号：US3217726A
公开(公告)日：1965-11-16
申请号：US26072963
申请日：1963-02-25
申请人： CATERPILLAR TRACTOR CO
发明人： ROHWEDER GERALD D , MORRIS HUGH C
IPC分类号： E02F9/22 , F15B11/02 , F15B11/16 , F16D67/00 , F16H61/02 , F16H61/16
CPC分类号： F16H61/16 , E02F9/2253 , F15B11/02 , F15B11/16 , F15B2211/20538 , F15B2211/30505 , F15B2211/30585 , F15B2211/31588 , F15B2211/324 , F15B2211/355 , F15B2211/50518 , F15B2211/50554 , F15B2211/5151 , F15B2211/528 , F15B2211/55 , F15B2211/57 , F15B2211/71 , F15B2211/76 , F15B2211/782 , F16D67/00 , F16H61/0262 , F16H2708/20 , Y10S74/02 , Y10T137/2524 , Y10T137/2607 , Y10T137/2663 , Y10T137/7758 , Y10T137/7795 , Y10T137/87169 , Y10T137/87241

54. 发明授权

US3124910A dever etal 失效
公开(公告)号：US3124910A
公开(公告)日：1964-03-17
申请号：US3124910D
IPC分类号： B24B47/06 , F15B11/04
CPC分类号： F15B11/04 , B24B47/06 , F15B2211/20538 , F15B2211/30505 , F15B2211/30525 , F15B2211/3111 , F15B2211/324 , F15B2211/325 , F15B2211/329 , F15B2211/351 , F15B2211/355 , F15B2211/40515 , F15B2211/41527 , F15B2211/455 , F15B2211/50536 , F15B2211/5151 , F15B2211/7052 , F15B2211/7053 , F15B2211/7107 , F15B2211/75

55. 发明授权

US2426063A Clutch operating mechanism 失效
公开(公告)号：US2426063A
公开(公告)日：1947-08-19
申请号：US44816742
申请日：1942-06-23
申请人： WESTINGHOUSE AIR BRAKE CO
发明人： STEVENS ROY R
IPC分类号： B63H21/22 , F15B11/16
CPC分类号： F15B11/16 , B63H21/213 , B63H21/22 , B63H23/08 , B63H23/30 , F15B2211/30505 , F15B2211/324 , F15B2211/325 , F15B2211/355 , F15B2211/40515 , F15B2211/40584 , F15B2211/428 , F15B2211/455 , F15B2211/473 , F15B2211/6355 , F15B2211/71 , F15B2211/78 , F16D48/00

56. 发明授权

US11959500B2 Air cylinder, head cover, and rod cover 有权
公开(公告)号：US11959500B2
公开(公告)日：2024-04-16
申请号：US17640498
申请日：2020-08-03
申请人： SMC CORPORATION
发明人： Youji Takakuwa , Akihiro Kazama , Hiroyuki Asahara , Kengo Monden
IPC分类号： F15B11/04 , F15B11/06 , F15B15/14 , F15B15/20 , F15B15/22
CPC分类号： F15B15/1433 , F15B11/0413 , F15B15/204 , F15B15/22 , F15B11/06 , F15B2211/30505 , F15B2211/329 , F15B2211/355 , F15B2211/40515 , F15B2211/40584 , F15B2211/40592 , F15B2211/7053 , F15B2211/75 , F15B2211/8855
摘要： The present invention pertains to an air cylinder (10) in which flow rate controllers (24, 24A) are built into a head cover (14) and a rod cover (16), said flow rate controllers (24, 24A) being provided with a first flow rate adjustment part (28) connected between a port (14a, 16a) and a cylinder chamber (12c), a second flow rate adjustment part (32) provided adjacent to the first flow rate adjustment part (28), and a pilot check valve (38) connected in series to the second flow rate adjustment part (32). In response to the pressure of pilot air, the pilot check valve (38) switches between a state in which the passage of exhaust air from the cylinder chamber (12c) is permitted and a state in which the passage of exhaust air is prevented.

57. 发明申请

US20190203743A1 HYDRAULIC NO-BACK DEVICE 审中-公开
公开(公告)号：US20190203743A1
公开(公告)日：2019-07-04
申请号：US16137957
申请日：2018-09-21
申请人： Microtecnica S.r.l.
发明人： Vincenzo SERRICCHIO , Andrea MORNACCHI , Domenico TAFUNI
IPC分类号： F15B20/00 , F15B11/10 , F15B13/02 , F15B13/042 , F16K31/122
CPC分类号： F15B20/004 , B64C13/40 , F15B11/003 , F15B13/01 , F15B13/0407 , F15B2211/30515 , F15B2211/329 , F15B2211/355 , F15B2211/40507 , F15B2211/6355 , F15B2211/7054 , F15B2211/8633 , F15B2211/8752
摘要： A system for moving a hydraulic actuator that uses the new type of hydraulic no-back device. In some examples, the system comprises: a hydraulic power module for pumping hydraulic fluid through the system to the actuator, a reservoir for receiving said fluid back from said system and said actuator, first and second check valves; a conduit or conduits for fluidly connecting said power module to said check valves and said reservoir; and wherein said conduit or conduits are connected so as to allow said hydraulic fluid to flow from the hydraulic power module to said first check valve, and from said first check valve into said hydraulic actuator, and from said hydraulic actuator to said second check valve and from said second check valve to said reservoir.

58. 发明申请

US20180106277A1 VALVE DEVICE AND FLUID PRESSURE CONTROL DEVICE 审中-公开
公开(公告)号：US20180106277A1
公开(公告)日：2018-04-19
申请号：US15566259
申请日：2016-03-14
申请人： KYB Corporation
发明人： Akio MATSUURA
IPC分类号： F15B11/028 , F16K11/07 , E02F9/22
CPC分类号： F15B11/028 , E02F9/2203 , E02F9/2225 , E02F9/2267 , E02F9/2282 , E02F9/2285 , F15B11/003 , F15B13/0402 , F15B13/0422 , F15B21/005 , F15B2211/30515 , F15B2211/3116 , F15B2211/329 , F15B2211/355 , F15B2211/41554 , F15B2211/428 , F15B2211/45 , F16K11/07 , F16K31/363
摘要： A valve device includes a valve body, a drain chamber wall configured to define a drain chamber, a drain port formed in the drain chamber wall facing the valving element, and a drain passage configured to guide drain fluid from another valve device to the drain chamber, wherein at least one of the drain chamber wall and the valving element includes a communicating passage configured to allow the drain port to communicate with the drain chamber when the movement of the valving element is restricted by the drain chamber wall.

59. 发明授权

US09903098B2 Pilot pressure control system 有权
公开(公告)号：US09903098B2
公开(公告)日：2018-02-27
申请号：US14771393
申请日：2013-03-06
申请人： VOLVO CONSTRUCTION EQUIPMENT AB
发明人： Bo Vigholm
IPC分类号： F15B13/043 , E02F9/22 , F15B20/00 , B62D5/09 , F15B21/08 , E02F9/08
CPC分类号： E02F9/225 , B62D5/091 , E02F9/0841 , E02F9/226 , E02F9/2267 , E02F9/2285 , E02F9/2296 , F15B13/0433 , F15B20/008 , F15B21/087 , F15B2211/20546 , F15B2211/355 , F15B2211/6355 , F15B2211/67 , F15B2211/7128 , F15B2211/8636 , F15B2211/8752
摘要： A pilot pressure control system for controlling a pilot signal pressure at a pilot inlet of a control valve includes a pilot outlet adapted to be connected to the pilot inlet. The pilot pressure control assembly further includes a first pilot valve assembly and a second pilot valve assembly. Each one of the first and second pilot valve assemblies are individually controllable so as to selectively provide a first fluid flow direction from a pressure line to the pilot outlet and a second fluid flow direction from the pilot outlet to a drain line. At least the first pilot valve assembly is adapted to assume a maximum pressure supply condition so as to supply a first pilot valve assembly maximum pressure to the pilot outlet. At least the second pilot valve assembly is adapted to provide a pressure drop from the pilot outlet to the drain line via the second pilot valve assembly. The pilot pressure control system is configured such that, when the pilot pressure control system is connected to the pressure and drain lines and when the first pilot valve assembly is controlled so as to assume the maximum pressure supply condition and the second pilot valve assembly provides a fluid flow in the second fluid direction with a minimum pressure drop, the pressure at the pilot outlet is equal to or above 20 of the first pilot valve assembly maximum pressure (Pmax).

60. 发明申请

US20160348335A1 LIQUID-PRESSURE DRIVING SYSTEM 审中-公开
标题翻译：液压驱动系统
公开(公告)号：US20160348335A1
公开(公告)日：2016-12-01
申请号：US15113926
申请日：2015-01-14
申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA
发明人： Akihiro KONDO , Makoto ITO , Kazuto FUJIYAMA
IPC分类号： E02F3/42 , F15B13/06 , F15B11/17 , E02F9/20 , E02F9/22
CPC分类号： E02F3/422 , E02F9/2004 , E02F9/2225 , E02F9/2228 , E02F9/2232 , E02F9/2242 , E02F9/2282 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B13/06 , F15B2211/20546 , F15B2211/20553 , F15B2211/20576 , F15B2211/255 , F15B2211/30595 , F15B2211/329 , F15B2211/355 , F15B2211/45 , F15B2211/6316 , F15B2211/6355 , F15B2211/7058 , F15B2211/71 , F15B2211/7135 , F15B2211/7142
摘要： A hydraulic driving system includes first to third liquid-pressure pumps and control valves. The first boom control valve is connected to the first hydraulic pump, and the second arm control valve and the first bucket control valve are connected to the second liquid-pressure pump. Further, the turning control valve and the second bucket control valve are connected to the third hydraulic pump. When a pilot pressure XAk0 is output from a bucket operating device while a turning operation is performed, a command switching device outputs a pilot pressure XAk1 to the first bucket control valve. When the pilot pressure XAk0 is output from the bucket operating device while the turning operation is performed, the command switching device outputs a pilot pressure XAk2 to a second bucket control valve.
摘要翻译：液压驱动系统包括第一至第三液压泵和控制阀。第一起重臂控制阀连接到第一液压泵，第二臂控制阀和第一铲斗控制阀连接到第二液压泵。此外，转向控制阀和第二铲斗控制阀连接到第三液压泵。当执行转向操作时从铲斗操作装置输出先导压力XAk0时，指令切换装置向第一铲斗控制阀输出先导压力XAk1。当执行转向操作时从铲斗操作装置输出先导压力XAk0时，命令切换装置向第二铲斗控制阀输出先导压力XAk2。

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