公开(公告)号：US06345564B1

公开(公告)日：2002-02-12

申请号：US09716760

申请日：2000-11-20

申请人： Jerome Kilner ,  Gary Lindahl

发明人： Jerome Kilner ,  Gary Lindahl

IPC分类号： F01B720

CPC分类号： B64C25/62 ,  B64C25/001 ,  B64C25/34 ,  F15B11/123

摘要： A semi-levered landing gear includes a main strut, a wheel truck pivotally attached at a main pivot to a lower end of the main strut and supporting forward and aft wheels, and an auxiliary strut attached at its upper end to the main strut and at its lower end to the wheel truck forward of the main pivot. The auxiliary strut includes a main piston that slides within a cylinder barrel and is attached at its lower end to the auxiliary pivot, and a floating piston that slides relative to the cylinder barrel and the main piston and divides the cylinder barrel into a pair of fluid chambers. The main piston includes snubbing holes or orifices through which fluid can flow between the two fluid chambers. The auxiliary strut also includes a lock-up valve that slides relative to the floating and main pistons and is configured to close the fluid path through the snubbing holes or orifices when the main and floating pistons are in predetermined positions relative to the lock-up valve, thereby locking the strut at a predetermined fixed length. The lock-up valve is configured such that the strut locks up at an intermediate length between a minimum and a maximum length of the strut, so that on takeoff, as the main strut extends, the auxiliary strut locks up to cause the wheel truck to tilt into a nose-up attitude. In one embodiment, the lock-up valve is actuatable to move into either a retracted position providing a short extension before locking up, or an extended position enabling the auxiliary strut to extend a greater amount before locking up. The auxiliary strut is also actuatable to extend the main piston for stowing the landing gear and to retract the main piston for tilting the wheel truck on landing approach.

摘要翻译： 半起落架起落架包括一个主支柱，一个主轴枢轴连接到主支柱的下端并支撑前后轮的轮车，以及在其上端附接到主支柱的辅助支柱 其下端向车轮前方的主枢轴。 辅助支柱包括在气缸筒内滑动并在其下端附接到辅助枢轴的主活塞，以及相对于气缸筒和主活塞滑动并将气缸筒分成一对流体的浮动活塞 房间。 主活塞包括可在两个流体室之间流动的缓冲孔或孔。 辅助支柱还包括锁定阀，其相对于浮动和主活塞滑动并且构造成当主活塞和浮动活塞相对于锁止阀处于预定位置时关闭通过缓冲孔或孔口的流体路径 从而将支柱锁定在预定的固定长度。 锁定阀被构造成使得支柱在支柱的最小和最大长度之间的中间长度处锁定，使得在起飞时，随着主支柱延伸，辅助支柱锁定以使车轮车 倾斜成一个鼻子的态度。 在一个实施例中，锁定阀可致动以在锁定之前移动到提供短延伸的缩回位置，或者在锁定之前使辅助支柱能够延伸更大量的延伸位置。 辅助支柱也可致动以延伸主活塞用于收起起落架并且在着陆进近时使主活塞缩回以使轮式车辆倾斜。

公开(公告)号：US06382080B1

公开(公告)日：2002-05-07

申请号：US09085512

申请日：1998-05-27

申请人： Claudio De Angelis ,  Kjell Johansson

发明人： Claudio De Angelis ,  Kjell Johansson

IPC分类号： F01B720

CPC分类号： F15B15/165

摘要： An apparatus for synchronizing a telescopic ram in a hydraulic elevator in which two or more pistons and a cylinder are simultaneously extended from and retracted into a foot portion mounted at the bottom of an elevator shaft includes a connecting cable which is fixed on one end to the shaft wall and on the other to one of the pistons and the cylinder and is deflected over a roller used for the synchronization. The connecting cable is a sheathed synthetic fiber cable.

摘要翻译： 一种用于使液压升降机中的可伸缩冲头同步的装置，其中两个或更多个活塞和气缸同时从安装在电梯井底部的脚部延伸并缩回到安装在电梯井底部的底部部分中的连接电缆，该连接电缆固定在一端至 轴壁，另一个活塞和气缸之间，并被偏转在用于同步的辊子上。 连接电缆是一根护套合成纤维电缆。

公开(公告)号：US06209440B1

公开(公告)日：2001-04-03

申请号：US09284328

申请日：1999-04-12

申请人： Friedrich Wilhelm Dannehl ,  Werner Reinelt

发明人： Friedrich Wilhelm Dannehl ,  Werner Reinelt

IPC分类号： F01B720

CPC分类号： E21D15/44

摘要： The double telescopic prop comprises an outer cylindrical casing tube 1, an inner tube 2 which is displaceable therein and a piston rod 3 which can be extended therefrom. The hydraulic fluid for extending the two prop stages is conveyed through a connection 14 to the piston 5 of the inner tube 2 and is conveyed via a bottom valve to the piston 7 of the piston rod 3. The prop is retracted if hydraulic fluid flows via the connection 17 into the outer annulus 11 between the cylindrical casing tube 1 and the inner tube 2. A size ratio of 8.8:1 at most, which is favourable for the retraction of the prop, exists between the area of the inner tube 2 and the ring area of the annulus 11.

摘要翻译： 双伸缩支架包括外圆柱形套管1，可在其中移位的内管2和可从其延伸的活塞杆3。 用于延伸两个支柱级的液压流体通过连接件14输送到内管2的活塞5，并通过底阀传送到活塞杆3的活塞7.如果液压流体经由 连接件17连接到圆筒形套筒管1和内管2之间的外环面11.在内管2的区域和内管2的区域之间存在最大为8.8:1的尺寸比，这有利于回缩 环的环面积11。

公开(公告)号：US06688211B1

公开(公告)日：2004-02-10

申请号：US10078570

申请日：2002-02-20

申请人： Vu H. Viet

发明人： Vu H. Viet

IPC分类号： F01B720

CPC分类号： F15B15/1404 ,  B25B5/061 ,  B25B27/023 ,  F15B15/1409

摘要： A dual linear actuator for allowing a tool to perform multiple actions either simultaneously or independently of one another. The dual linear actuator includes an outer tubular housing having open first and second ends and also having a bore extending therethrough; and also includes an inner tubular housing being securely disposed in the bore of the outer tubular housing and having open first and second ends and also having a bore extending therethrough; and further includes a first cap being removably attached to the first ends of the outer and inner tubular housings; and also includes a second cap having a side wall and being removably attached to the second end of the inner tubular housing; and further includes a third cap having a side wall and being removably attached to the second end of the outer tubular housing; and also includes a first piston assembly including a tubular piston being movably disposed in the bore of the outer tubular housing; and further includes a second piston assembly including a piston member being movably disposed in the bore of the inner tubular housing.

摘要翻译： 双线性致动器，用于允许工具同时或彼此独立地执行多个动作。 双线性致动器包括具有开放的第一和第二端并且还具有延伸穿过其中的孔的外部管状壳体; 并且还包括牢固地设置在外部管状壳体的孔中并具有开放的第一和第二端并且还具有延伸穿过其中的孔的内部管状壳体; 并且还包括可移除地附接到所述外管壳和所述内管壳的所述第一端的第一帽; 并且还包括具有侧壁并且可移除地附接到内管状壳体的第二端的第二盖; 并且还包括具有侧壁并且可移除地附接到所述外管状壳体的第二端的第三帽; 并且还包括第一活塞组件，其包括可移动地设置在外部管状壳体的孔中的管状活塞; 并且还包括第二活塞组件，其包括可活动地设置在所述内管状壳体的孔中的活塞构件。

公开(公告)号：US06651546B2

公开(公告)日：2003-11-25

申请号：US09750092

申请日：2000-12-29

申请人： William C. Sandlin

发明人： William C. Sandlin

IPC分类号： F01B720

CPC分类号： F15B7/08 ,  F15B7/001 ,  F15B11/125

摘要： A multi-stroke air cylinder providing a precisely directed and controlled stroke in the face of lateral, torsional and tilting loads on a tooling plate. The multi-stroke cylinder utilizes a plurality of mechanically linked pneumatic or hydraulic pistons having different stroke lengths that can be added together in any combination, allowing the user to select any stroke length up to a predetermined, total combined stroke length, in increments equal to the stroke length of the smallest cylinder. The multi-stroke cylinder includes a head assembly having a fluid inlet for introducing fluid to the cylinder at a first pressure. The cylinder also includes a first positioning system having a plurality of pistons capable of moving a piston rod away from the first positioning system, and a second positioning system located between the head assembly and the first positioning system. The second positioning system comprises a plurality of movable pistons for displacing the piston rod a preselected distance and at least one elongated fluid supply member secured to a respective one of the pistons of the second positioning system for introducing a fluid between adjacent pistons. When a plurality of fluid supply members are used in the second positioning system, they are concentrically arranged and are at least partially coextensive with one another.

公开(公告)号：US06526865B2

公开(公告)日：2003-03-04

申请号：US09842385

申请日：2001-04-25

申请人： Bradley Allen Weedon

发明人： Bradley Allen Weedon

IPC分类号： F01B720

CPC分类号： F15B15/1466 ,  B23K11/31 ,  B23K11/314 ,  B23K11/36 ,  B23K37/0247 ,  F15B15/1414

摘要： According to the present disclosure, a fluid cylinder is provided that is configured to move an object between first and second positions. The fluid cylinder includes a cylinder housing and a shaft configured to move between extended and retracted positions relative to the cylinder housing. Preferably, the fluid cylinder includes a scraper positioned to contact an outer surface of the shaft to remove contaminants therefrom during movement of the shaft. Furthermore, the preferred fluid cylinder includes an anti-rotation mechanism positioned to prevent rotation of the shaft.

公开(公告)号：US06257117B1

公开(公告)日：2001-07-10

申请号：US09531327

申请日：2000-03-20

申请人： Ryuzo Yagishita

发明人： Ryuzo Yagishita

IPC分类号： F01B720

CPC分类号： F15B15/1409 ,  F15B11/0325 ,  F15B2211/214 ,  F15B2211/50518 ,  F15B2211/5153 ,  F15B2211/524 ,  F15B2211/55 ,  F15B2211/7052

摘要： The inside of a cylinder is divided into front and rear cylinder chambers, a primary-side piston and a secondary-side piston, each formed by an annular disc part and an annular tube part are fitted into each cylinder chamber, with the annular tube parts of each loosely fitted together, and the secondary-side piston surrounding an operating piston rod so as to hold the operating piston and being fit into the operating piston. The first front cylinder chamber and the second rear cylinder chamber defined by the primary- and secondary-side pistons are connected by a communicating passageway with a relief valve inserted therein, this relief valve being switched to the open condition by either a prescribed pressure or a valve opening/closing bar that is provided upright on the primary-side piston.

摘要翻译： 气缸的内部被分成前气缸室和后气缸室，每个由环形盘部分和环形管部分形成的初级侧活塞和次级侧活塞装配到每个气缸室中，其中环形管部分 每个松动地装配在一起，并且次级侧活塞围绕操作的活塞杆，以便保持操作活塞并且配合到操作活塞中。 由一次侧活塞和次侧活塞限定的第一前缸室和第二后缸室通过连接通道与插入其中的安全阀连接，该安全阀通过规定的压力或 在初级侧活塞上竖立设置的开闭阀。

公开(公告)号：US06546840B1

公开(公告)日：2003-04-15

申请号：US09998891

申请日：2001-11-27

申请人： Jim O. Cruey

发明人： Jim O. Cruey

IPC分类号： F01B720

CPC分类号： F16J1/005 ,  F15B15/1428 ,  F15B15/1447

摘要： A mechanical pneumatic piston is comprised of an upper cylindrical section and a lower cylindrical section, wherein each section has four linearly elongated, miter-cut staves, an end sleeve, and a slide-guide ring. The mechanical pneumatic piston is further defined as having an internal upper, central, and lower cavity adjacently aligned and extending axially within the piston.

摘要翻译： 机械气动活塞由上部圆柱形部分和下部圆柱形部分组成，其中每个部分具有四个线性细长的斜切割板条，端部套筒和滑动导向环。 机械气动活塞进一步限定为具有在活塞内相邻对准并且轴向延伸的内部上部，中心和下部空腔。

公开(公告)号：US06474216B2

公开(公告)日：2002-11-05

申请号：US09790789

申请日：2001-02-22

申请人： Norbert Heinz ,  Thomas Eichenmüller ,  Karlheinz Hofmann

发明人： Norbert Heinz ,  Thomas Eichenmüller ,  Karlheinz Hofmann

IPC分类号： F01B720

CPC分类号： F16F9/38

摘要： Protective tube for a piston-cylinder assembly of the type including a piston rod located with freedom of axial movement in a cylinder, the rod also having a section which extends outside the cylinder. A retaining element for the protective tube is attached to the piston rod, which retaining element includes a multi-part connecting ring, the parts of which are installed in the radial direction toward the piston rod and are operatively connected to it. The protective tube is connected to the connecting ring parts so that these parts come together to form a connecting ring which is braced at least in the radial direction.

摘要翻译： 用于这种类型的活塞 - 气缸组件的保护管，其包括在气缸中具有轴向运动自由度的活塞杆，所述杆还具有延伸到气缸外部的部分。 用于保护管的保持元件附接到活塞杆，该保持元件包括多部分连接环，其多个部分沿径向朝向活塞杆安装并且可操作地连接到该活塞杆。 保护管连接到连接环部分，使得这些部件一起形成至少沿径向支撑的连接环。

公开(公告)号：US06450083B1

公开(公告)日：2002-09-17

申请号：US09765446

申请日：2001-01-22

申请人： Steven Clare Dawson

发明人： Steven Clare Dawson

IPC分类号： F01B720

CPC分类号： F15B15/16

摘要： A telescoping hydraulic hoist which improves stability and rigidity in the extended position without sacrificing the maximum extension length of the hoist and with fewer machined parts which may be dislodged or damaged in operation. The base member has a recess into which intermediate and inner tube stages recede when the hoist is in a fully collapsed position, and a stop-collar on the gland nut bearings overlaps the exposed end of the next broader tube stage, defining a limit of retraction for each intermediate tube stage, so that a tube stage when fully retracted contacts the exposed end of the next broader tube stage, thus dispensing with the need for stop rings.

摘要翻译： 一种伸缩式液压起重机，可在延长位置提高稳定性和刚度，而不会牺牲起重机的最大延伸长度，并减少可能在运行中被移动或损坏的机械零件。 底座部件有一个凹槽，当起重机处于完全折叠位置时，中间管段和内管段后退，并且压盖螺母轴承上的止动环与下一个较宽管段的暴露端重叠，限定了回缩极限 对于每个中间管段，使得当完全缩回时的管段接触下一个较宽管段的暴露端，从而分配停止环的需要。