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    • 59. 发明授权
    • Dispensing pump with priming feature
    • 带启动功能的点胶泵
    • US5702031A
    • 1997-12-30
    • US493231
    • 1995-06-20
    • Emil MeshbergPhilip MillerRobert Schultz
    • Emil MeshbergPhilip MillerRobert Schultz
    • B05B11/00G01F11/00
    • B05B11/3061B05B11/3018
    • The present invention relates to a precompression pump with a feature to evacuate air trapped in the pump chamber to thereby assist in priming the pump. In particular, the present invention relates to a precompression pump which uses mechanisms to create gaps of very small size to bridge two seals on a pump piston, in a way that the small size of the gaps allows the passage of trapped air, but because of the viscosity of any liquid in the pump chamber does not allow the passage of liquid past the seals on the pump piston. Flats which define a chord of the inner circumference of the cylinder wall can be used to create the appropriate gaps. In addition, the core creating the inner circumference can be photochemically etched to provide a roughened surface with asperities which create the appropriate gaps. The priming mechanisms preferably create air gaps around both seals of the pump piston.
    • 本发明涉及一种预压缩泵,其特征在于,用于排出捕获在泵室中的空气,从而有助于起动泵。 特别地,本发明涉及一种预压缩泵,其使用机构来产生非常小尺寸的间隙以将泵活塞上的两个密封件跨接,使得小尺寸的间隙允许被捕获的空气通过,但是由于 泵室中任何液体的粘度不允许液体通过泵活塞上的密封件。 可以使用限定气缸壁的内周的弦的平板来产生适当的间隙。 另外,产生内圆周的芯可以进行光化学蚀刻,以提供粗糙的表面,产生形成适当间隙的粗糙度。 起动机构优选地围绕泵活塞的两个密封件产生气隙。