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    • 61. 发明申请
    • EVACUATION APPARATUS
    • 撤离装置
    • US20080080984A1
    • 2008-04-03
    • US11861005
    • 2007-09-25
    • Shiro TANIGAWATakamitsu NAKAYAMARyusuke MUTOMinako TODA
    • Shiro TANIGAWATakamitsu NAKAYAMARyusuke MUTOMinako TODA
    • F04B23/04F04B41/06
    • F04C18/126F04C23/005F04C25/02F04C28/02F04C28/06F04C2220/12F04C2250/102
    • The present invention discloses an evacuation apparatus for evacuating a tank, a chamber, and the like; wherein a mechanical vacuum booster pump is provided at an up-stream side of an exterior side vacuum pump; wherein the mechanical booster pump has a discharge openings for low compression and a discharge opening for discharging a high compression gas; wherein, in case when the exterior side vacuum pump starts discharging a gas, the gas is sent to the exterior side vacuum pump through all of the discharge openings for low compression and the discharge opening for discharging a high compression gas and, in case when the discharged gas pressure reaches afterward an ultimate pressure (a medium vacuum) attainable by the exterior side vacuum pump, the gas is sent to the exterior side vacuum pump only through the discharge opening for discharging a high compression gas.
    • 本发明公开了一种用于抽空罐,腔室等的排气装置; 其中在外侧真空泵的上游侧设置有机械真空增压泵; 其中所述机械增压泵具有用于低压缩的排出口和用于排出高压缩气体的排出口; 其中,在外侧真空泵开始排出气体的情况下,气体通过所有的低压排出口和用于排出高压缩气体的排出口被送到外侧真空泵,而在 排出气体压力之后达到由外侧真空泵可达到的极限压力(中等真空),仅通过用于排出高压缩气体的排出口将气体送至外侧真空泵。
    • 67. 发明授权
    • Vacuum pumps
    • 真空泵
    • US06672855B2
    • 2004-01-06
    • US09740085
    • 2000-12-19
    • Michael Henry North
    • Michael Henry North
    • F04C1800
    • F04C18/084F04C18/16F04C2220/12F04C2250/201
    • A vacuum pump having a screw mechanism and comprising two externally threaded rotors mounted on respective shafts in a pump body and adapted for counter-rotation therein with intermeshing of the rotor threads with close tolerances between the threads and internal surfaces of the pump body in order that gas may be pumped from a pump inlet to a pump outlet by action of the rotor threads, the root diameter of each rotor increases and the thread diameter of each rotor decreases in a direction from the pump inlet to the pump outlet, and wherein the pitch of the rotor threads decreases in a direction from the pump inlet to the pump outlet.
    • 一种真空泵,其具有螺旋机构并且包括两个外螺纹转子,其安装在泵体中的相应轴上并且适于在其中反向旋转,其中转子螺纹与螺纹和泵体的内表面之间的紧公差相互啮合,以便 气体可以通过转子螺纹的作用从泵入口泵送到泵出口,每个转子的根直径增加,并且每个转子的螺纹直径在从泵入口到泵出口的方向上减小,并且其中间距 的转子螺纹在从泵入口到泵出口的方向上减小。