Hydraulic power steering apparatus
    22.
    发明授权
    Hydraulic power steering apparatus 失效
    液压动力转向装置

    公开(公告)号:US5638912A

    公开(公告)日:1997-06-17

    申请号:US339229

    申请日:1994-11-10

    IPC分类号: B62D5/07 B62D5/083

    CPC分类号: B62D5/083

    摘要: A power steering apparatus is composed a fluid source for discharging pressurized fluid, a power cylinder, a control valve responsive to operation of a steering wheel for supplying the power cylinder with pressurized fluid from the fluid source, and a reservoir. The control valve has a first control portion for controlling the flow of pressurized fluid from the fluid source to the reservoir, and a second control portion for controlling the flow of pressurized fluid to the power cylinder. The first control portion has four paths communicating with the fluid source and the reservoir, and each of the four paths is formed with a center-open variable orifice which opens when the control valve is in a neutral state. The second control portion has two supply paths communicating with the fluid source and a pair of chambers of the power cylinder, each of the two supply paths is formed with a semi-center-open variable orifice which opens when the control valve is in the neutral state, and two drain paths communicating with the chambers of the power cylinder and the reservoir, each of the two drain paths is formed with a center-closed variable orifice of which closes when the control valve is in the neutral state.

    摘要翻译: 动力转向装置包括用于排出加压流体的流体源,动力缸,响应于操作方向盘的控制阀,用于向动力缸提供来自流体源的加压流体和储存器。 控制阀具有用于控制加压流体从流体源流向储存器的第一控制部分和用于控制加压流体流向动力缸的第二控制部分。 第一控制部分具有与流体源和储存器连通的四个路径,并且四个路径中的每一个路径形成有当控制阀处于中立状态时打开的中心可开启​​的可变孔口。 第二控制部具有与流体源连通的两个供给路径和动力缸的一对室,两个供给路径中的每一个形成有半中心开口的可变孔,当控制阀处于中立状态时打开 状态和与动力缸和储存器的腔室连通的两个排放路径,两个排水路径中的每一个形成有中心闭合的可变孔口,当控制阀处于空档状态时,其可关闭。

    Hydraulic power steering apparatus
    23.
    发明授权
    Hydraulic power steering apparatus 失效
    液压动力转向装置

    公开(公告)号:US5577573A

    公开(公告)日:1996-11-26

    申请号:US357757

    申请日:1994-12-16

    IPC分类号: B62D5/06 B62D6/02

    CPC分类号: B62D5/062 B62D6/02

    摘要: A hydraulic power steering system includes a pump, a flow control valve, and a bypass control valve. The flow control valve responds to a pressure drop across a metering orifice disposed in a fluid supply passage so as to control the flow rate of operating fluid by bypassing a part of the operating fluid to a reservoir. A spring chamber of the flow control valve is connected to the supply passage through a control orifice. The bypass control valve is disposed between the spring chamber and the reservoir so as to increase the amount of bypassed fluid by controlling the pressure in the spring chamber. The bypass control valve has a control spool, a load pressure introduction port connected to the upstream side of the control orifice for leading the load pressure to a first end of the control spool and a pilot port connected to the downstream side of the control orifice for leading the pressure in the spring chamber of the flow control valve to a second end of the control spool. Moreover, a pressure receiving area of the second end of the control spool is smaller than that of the first end of the control spool. Accordingly, a spring having a small spring constant can be used in the bypass control valve, even when the control spool is controlled within a short stroke. Further, the control spool, the load pressure introduction port, and the pilot port are formed in a sleeve.

    摘要翻译: 液压动力转向系统包括泵,流量控制阀和旁通控制阀。 流量控制阀响应设置在流体供应通道中的计量孔的压降,以便通过将一部分工作流体绕过储存器来控制工作流体的流量。 流量控制阀的弹簧室通过控制孔连接到供给通道。 旁通控制阀设置在弹簧室和储存器之间,以通过控制弹簧室中的压力来增加旁路流体的量。 旁通控制阀具有控制阀芯,连接到控制孔的上游侧的负载压力引入口,用于将负载压力引导到控制阀芯的第一端,以及连接到控制孔的下游侧的先导端口, 将流量控制阀的弹簧室中的压力引导到控制阀芯的第二端。 此外,控制阀芯的第二端的受压面积小于控制阀芯的第一端的受压面积。 因此,即使控制阀芯在短行程内被控制,也可以在旁通控制阀中使用弹簧常数小的弹簧。 此外,控制阀芯,负载压力引入口和先导端口形成在套筒中。

    Hydraulic power steering apparatus
    24.
    发明授权
    Hydraulic power steering apparatus 失效
    液压动力转向装置

    公开(公告)号:US5439070A

    公开(公告)日:1995-08-08

    申请号:US75307

    申请日:1993-06-11

    摘要: A power steering apparatus having a hydraulic pump for outputting a pressurized fluid, an assist force generation mechanism hydraulically connected to the pump through a supply passage to generate an assist force in response to rotation of a steering wheel, wherein the assist force generation mechanism has a characteristic that the back pressure thereof increases when the steering wheel is rotated. The power steering apparatus further comprises a flow control valve having a spool which is moved in response to a pressure drop at a metering orifice disposed in the middle of the supply passage, so as to control the flow rate of the pressurized fluid to be constant. The spring chamber of the flow control valve is connected to a reservoir through a drain passage, and a drain valve is disposed in the drain passage for allowing the flow of pressurized fluid from the spring chamber to the reservoir when the back pressure of the assist force generation mechanism is low, and for prohibiting the flow of the pressurized fluid when the back pressure of the assist force generation mechanism increases.

    摘要翻译: 一种动力转向装置,其具有用于输出加压流体的液压泵,辅助力产生机构,其通过供给通道与泵液压连接,以产生响应于方向盘旋转的辅助力,其中辅助力产生机构具有 其特征在于当方向盘旋转时其背压增加。 动力转向装置还包括流量控制阀,该流量控制阀具有响应于设置在供给通道中间的计量孔口处的压降而移动的阀芯,以便控制加压流体的流量恒定。 流量控制阀的弹簧室通过排水通道连接到储存器,并且排水阀设置在排水通道中,用于当加压流体从弹簧室流到储存器时,当辅助力的背压 发电机构低,并且当辅助力产生机构的背压增加时禁止加压流体的流动。

    Two-dimensional optical encoder with three gratings in each dimension
    25.
    发明授权
    Two-dimensional optical encoder with three gratings in each dimension 失效
    具有三维光栅尺的二维光编码器

    公开(公告)号:US5204524A

    公开(公告)日:1993-04-20

    申请号:US848116

    申请日:1992-03-09

    IPC分类号: G01D5/36

    CPC分类号: G01D5/36

    摘要: A first grating is formed on a main scale, and a second and third gratings on an index scale. The first grating generally assumes a cruciform shape, and consists of a grating having grating lines arranged in the X-direction and another grating having grating lines arranged in the Y-direction. The second grating is formed in a square central area of the index scale, and consists of two gratings having grating lines arranged in the X-direction and divided at the center and another two gratings having grating lines arranged in the Y-direction and divided at the center. The third grating consists of four gratings having grating lines arranged in the X-direction with different phases and another four gratings having grating lines arranged in the Y-direction with different phases. A light-emitting element and eight photodetectors that are arranged corresponding to the respective gratings of the third grating are fixed to a movable member on which the index scale is attached. Light emitted from the light-emitting element passes though the second grating, reflected by the first grating, passes through the third grating, and finally detected by the photodetectors. Alternatively, the first grating may consist of rectangular portions arranged in the X- and Y-direction in a matrix form.

    摘要翻译: 第一光栅形成在主刻度上,第二光栅和第三光栅以指标标度形成。 第一光栅通常呈十字形,由具有沿X方向排列的光栅线的光栅和具有沿Y方向排列的光栅线的另一光栅组成。 第二光栅形成在索引刻度的正方形中心区域中,由两个光栅组成,其格栅线沿X方向排列并分成中心,另外两个光栅具有沿Y方向布置的光栅线,并分为 中心。 第三光栅由具有不同相位的沿X方向布置的光栅线的四个光栅组成,另外四个光栅具有沿Y方向排列的具有不同相位的光栅线。 对应于第三光栅的各个光栅排列的发光元件和八个光电检测器被固定到附着有指标的可动部件上。 从发光元件发射的光通过第二光栅,被第一光栅反射,穿过第三光栅,最后由光电检测器检测。 或者,第一光栅可以由以矩阵形式布置在X方向和Y方向上的矩形部分组成。

    Quinoline type mevalonolactones useful for treating hyperlipidemia,
hyperlipoproteinemia or atherosclerosis
    26.
    发明授权
    Quinoline type mevalonolactones useful for treating hyperlipidemia, hyperlipoproteinemia or atherosclerosis 失效
    可用于治疗高脂血症,高脂蛋白血症或动脉粥样硬化的喹啉型甲羟戊酸

    公开(公告)号:US5185328A

    公开(公告)日:1993-02-09

    申请号:US483829

    申请日:1990-02-23

    摘要: A compound of the formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.6 are independently hydrogen, C.sub.1-6 alkyl, C.sub.1-6 cycloalkyl, C.sub.1-3 alkoxy, n-butoxy, i-butoxy, sec-butoxy, R.sup.7 R.sup.8 N-- (wherein R.sup.7 and R.sup.8 are independently hydrogen or C.sub.1-3 alkyl), trifluoromethyl, trifluoromethoxy, difluoromethoxy, fluoro, chloro, bromo, phenyl, phenoxy, benzyloxy, hydroxy, trimethylsilyloxy, diphenyl-t-butylsilyloxy, hydroxymethyl or --O(CH.sub.2).sub.l OR.sup.19 (wherein R.sup.19 is hydrogen or C.sub.1-3 alkyl, and l is 1,2 or 3); or when located at the ortho position to each other, R.sup.1 and R.sup.2, or R.sup.3 and R.sup.4 together form --CH.dbd.CH--CH.dbd.CH--; or when located at the ortho position to each other, R.sup.1 and R.sup.2 together form --OC(R.sup.15 l) (R.sup.16)O-- (wherein R.sup.15 and R.sup.16 are independently hydrogen or C.sub.1-3 alkyl); Y is --CH.sub.2 --, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --CH.sub.2 --CH.dbd.CH-- or -- CH.dbd.CH--CH.sub.2 --; and Z is --Q--CH.sub.2 WCH.sub.2 --CO.sub.2 R.sup.12, ##STR2## (wherein Q is --C(O)--, --C(OR.sup.13).sub.2 -- or --CH(OH)--; W is --C(O)--, --C(OR.sup.13).sub.2 -- or --C(R.sup.11) (OH)--; R.sup.11 is hydrogen atom or C.sub.1-3 alkyl; R.sup.12 is hydrogen or R.sup.14 (wherein R.sup.14 is physiologically hydrolyzable alkyl or M (wherein M is NH.sub.4, sodium, potassium, 1/2 calcium or a hydrate of lower alkyl amine, di-lower alkyl amine or tri-lower alkyl amine)); two R.sup.13 are independently primary or secondary C.sub.1-6 alkyl; or two R.sup.13 together form --(CH.sub.2).sub.2 -- or --(CH.sub.2).sub.3 ; R.sup.17 and R.sup.18 are independently hydrogen or C.sub.1-3 alkyl; and R.sup.5 is hydrogen, C.sub.1-6 alkyl, C.sub.2-3 alkenyl, C.sub.3-6 cycloalkyl, ##STR3## wherein R.sup.9 is a hydrogen atom, C.sub.1-4 alkyl, C.sub.1-3 alkoxy, fluoro, chloro, bromo or trifluoromethyl), phenyl--(CH.sub.2).sub.m -- (wherein m is 1,2 or 3), --(CH.sub.2).sub.n CH(CH.sub.3)--phenyl or phenyl--(CH.sub.2).sub.n CH(CH.sub.3)-- (wherein n is 0,1 or 2).

    摘要翻译: 下式的化合物:其中R 1,R 2,R 3,R 4和R 6独立地是氢,C 1-6烷基,C 1-6环烷基,C 1-3烷氧基,正丁氧基,异丁氧基,仲丁氧基, 丁氧基,R7R8N-(其中R7和R8独立地是氢或C1-3烷基),三氟甲基,三氟甲氧基,二氟甲氧基,氟,氯,溴,苯基,苯氧基,苄氧基,羟基,三甲基甲硅烷氧基,二苯基叔丁基甲硅烷氧基,羟甲基或 - O(CH 2)lOR 19(其中R 19是氢或C 1-3烷基,且l是1,2或3); 或当位于彼此的邻位时,R1和R2,或R3和R4一起形成-CH = CH-CH = CH-; 或当位于彼此的邻位时,R1和R2一起形成-OC(R151)(R16)O-(其中R15和R16独立地为氢或C1-3烷基); Y是-CH 2 - , - CH 2 CH 2 - , - CH = CH - , - CH 2 -CH = CH-或-CH = CH-CH 2 - ; (其中Q为-C(O) - , - C(OR 13)2 - 或-CH(OH) - ); W为-C(O) - (CH 2) ,-C(OR 13)2 - 或-C(R 11)(OH) - ; R 11为氢原子或C 1-3烷基; R 12为氢或R 14(其中R 14为生理上可水解的烷基或M(其中M为NH 4,钠 ,二价低级烷基胺或三低级烷基胺的水合物));两个R 13独立地为伯或仲C 1-6烷基;或两个R 13一起形成 - (CH 2) 2-或 - (CH 2)3; R 17和R 18独立地是氢或C 1-3烷基; R 5是氢,C 1-6烷基,C 2-3烯基,C 3-6环烷基,其中R 9是氢原子 ,C 1-4烷基,C 1-3烷氧基,氟,氯,溴或三氟甲基),苯基 - (CH 2)m - (其中m为1,2或3), - (CH 2)n CH(CH 3) - (CH 2)n CH(CH 3) - (其中n为0,1或2)。

    Method for continuous casting of steel
    28.
    发明授权
    Method for continuous casting of steel 失效
    连铸钢的方法

    公开(公告)号:US5033534A

    公开(公告)日:1991-07-23

    申请号:US487758

    申请日:1990-03-02

    IPC分类号: B22D11/115

    CPC分类号: B22D11/115

    摘要: A method for continuous casting of steel comprises charging molten steel from a tundish into a mold through exit ports of an immersion nozzle, introducing a magnetic field vertically to a flow of the molten steel from the exit ports by the use of at least a pair of direct current magnets which are arranged on the outer side of copper plates on the wide side of the mold, the immersion nozzle being placed between the direct current magnets and polarities of magnetisms on the top side of the magnets being the same, and casting the molten steel at a predetermined casting rate. One magnetic pole of the direct current magnet is positioned at an upper end of copper plate on the wide side of the mold and the other magnetic pole being positioned at lower than the exit port of the immersion nozzle and on the outer side of copper plate on the wide side of the mold. The immersion nozzle has two exit ports, each of which has an angle of 15.degree. to 45.degree. downward. The direct current magnetic field is controlled within the range of 1000 to 4000 gauss.

    Power steering system with hydraulic reaction
    30.
    发明授权
    Power steering system with hydraulic reaction 失效
    动力转向系统具有液压反应

    公开(公告)号:US4805714A

    公开(公告)日:1989-02-21

    申请号:US3766

    申请日:1987-01-16

    CPC分类号: B62D6/00 B62D5/22

    摘要: A power steering system which includes a fluid source that supplies pressure fluid of a constant flow rate, a fluid motor for supplementing manual steering torque, a servo-valve for distributing fluid to the fluid motor, and a reaction device for applying hydraulic reaction or feeling to a steering wheel. A magnetic control valve is connected to the reaction device to control fluid pressure applied thereto in accordance with a vehicle operating condition, such a vehicle speed. A flow dividing valve serves to divide the pressure fluid of a constant flow rate in a predetermined ratio into first and second flows which are respectively directed to the servo-valve and reaction device. A bypass conduit provided with a bypass orifice is connected between the fluid source and the servo-valve in parallel relation with the flow dividing valve.

    摘要翻译: 一种动力转向系统,包括供给恒定流量的压力流体的流体源,用于补充手动转向扭矩的流体马达,用于向流体马达分配流体的伺服阀,以及用于施加液压反应或感觉的反作用装置 到方向盘。 磁力控制阀连接到反作用装置,以根据车辆操作条件(如这种车速)来控制施加到其上的流体压力。 分流阀用于将预定比例的恒定流量的压力流体分成分别指向伺服阀和反应装置的第一和第二流。 具有旁通孔的旁通管路与流量分配阀并联连接在流体源和伺服阀之间。