Pump for cryogenic fluids
    2.
    发明授权
    Pump for cryogenic fluids 失效
    低温液体泵

    公开(公告)号:US4639197A

    公开(公告)日:1987-01-27

    申请号:US697756

    申请日:1985-02-04

    IPC分类号: F04B3/00 F04B15/08 F17C5/02

    摘要: The cryogenic pump operates in two stages, utilizing a supercharging part and a high pressure part. These two parts are comprised of a high pressure piston pump (3, 4, 34, 35) and a supercharger (5, 6, 61, 62) disposed in a tandem relationship and sharing a common piston rod (8). The supercharger is enclosed in a heat insulated intermediate container (7) and delivers the liquid cryogenic fluid to the high pressure cylinder. The pump operates to convey a liquid cryogenic fluid such as liquid nitrogen, for example, at a high pressure through evaporating means into pressure resistant commercial steel cylinders where the gaseous nitrogen is kept at a pressure of 200 bar and ambient temperature.

    摘要翻译: 低温泵使用增压部件和高压部件两个阶段。 这两个部件包括高压活塞泵(3,4,45,35)和以串联关系设置并共用公共活塞杆(8)的增压器(5,6,61,62)。 增压器被封闭在隔热中间容器(7)中,并将液体低温流体输送到高压缸。 泵的作用是将诸如液氮的液体低温流体例如在高压下通过蒸发装置输送到耐压商业钢瓶中,其中气态氮保持在200巴和环境温度的压力。

    Device for vaporizing a cryogenic fluid
    3.
    发明授权
    Device for vaporizing a cryogenic fluid 失效
    用于蒸发低温流体的装置

    公开(公告)号:US4881495A

    公开(公告)日:1989-11-21

    申请号:US133305

    申请日:1987-12-16

    摘要: The device operates with an internal combustion engine (1) and utilizes the combustion heat of the same. In addition to the heat of the cooling water exiting from the engine (1), the exhaust gases are transferred to a water circuit in an exhaust gas heat exchanger (4). The mechanical performance of the engine (1) is, through the direct application of a hydraulic brake (14), almost completely changed into thermal energy, and the heat thus produced is likewise conducted to the water circuit. The water heated is conducted through a vaporizing unit (7), where it brings the cryogenic fluid conducted in a pipe coil (25) or in a pipe assembly to vaporization.

    摘要翻译: 该装置与内燃机(1)一起工作,并利用其内燃机的热量。 除了从发动机(1)排出的冷却水的热量之外,废气也被传送到排气热交换器(4)中的水回路。 发动机(1)的机械性能通过直接施加液压制动器(14)几乎完全变成热能,并且由此产生的热量同样被传导到水回路。 加热的水通过蒸发单元(7)进行,其中将导管在管线圈(25)或管道组件中的低温流体带入蒸发。

    Pyrimidine derivatives
    7.
    发明授权
    Pyrimidine derivatives 失效
    嘧啶衍生物

    公开(公告)号:US4776973A

    公开(公告)日:1988-10-11

    申请号:US832120

    申请日:1986-02-24

    CPC分类号: C07D239/26 C09K19/3458

    摘要: Pyrimidine derivatives of the formula IR.sup.1 --Pry--A.sup.1 --Z.sup.1 --A.sup.2 -[Z.sup.2 --A.sup.3 ].sub.m --R.sup.2 Iin whichR.sup.1 and R.sup.2 each are an alkyl group having 1 to 12 C atoms, in which one or two non-adjacent CH.sub.2 groups can also be replaced by --O--, --CO--, --O--CO--, --CO--O-- or --CH.dbd.CH--, and one of the radicals R.sup.1 and R.sup.2 are H, F, Cl, Br or CN,Pyr is pyrimidine-2,5-diyl,A.sup.1 and A.sup.3 each are 1,4-cyclohexylene, unsubstituted 1,4-phenylene or 1,4-phenylene which is substituted by one or two F and/or Cl atoms and/or CH.sub.3 and /or CN groups,A.sup.2 is 1,4-phenylene which is unsubstituted or substituted by one or two F and/or Cl atoms and/or CH.sub.3 and/or CN groups,Z.sup.1 is --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, or --OCH.sub.2 --Z.sup.2 is --CO--O--, --O--CO--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 O--, --O--CH.sub.2 -- or a single bond, andm is 0 or 1,are suitable for preparing liquid crystal phases having steep electro-optical characteristic curves.

    摘要翻译: 式I的嘧啶衍生物R1-Pry-A1-Z1-A2- [Z2-A3] m-R2I,其中R1和R2各自为具有1至12个C原子的烷基,其中一个或两个不相邻的CH2 基团也可以被-O - , - CO-,-O-CO-,-CO-O-或-CH = CH-取代,基团R1和R2之一是H,F,Cl,Br或CN 吡啶是嘧啶-2,5-二基,A1和A3各自为1,4-亚环己基,未被取代的1,4-亚苯基或1,4-亚苯基,其被一个或两个F和/或Cl原子和/或 CH 3和/或CN基团,A2是未被取代或被一个或两个F和/或Cl原子和/或CH 3和/或CN基团取代的1,4-亚苯基,Z 1是-CH 2 CH 2 - , - CH 2 O-或 -OCH 2 - Z 2是-CO-O-,-O-CO-, - CH 2 CH 2 - , - CH 2 O-,-O-CH 2 - 或单键,m是0或1,适用于制备具有 陡峭的电光特性曲线。