PIPETTE
    13.
    发明专利
    PIPETTE 未知

    公开(公告)号:GB1492432A

    公开(公告)日:1977-11-16

    申请号:GB519375

    申请日:1975-02-06

    Inventor: SCORDATO EMIL A

    Abstract: 1492432 Pipette MEDICAL LABORA TORY AUTOMATION Inc 6 Feb 1975 [12 Feb 1974] 5193/75 Heading B1X A pipette comprises first and second chambers 54 and 57, the second chamber communicating with the first through a normally closed valve 50, a first piston 14 reciprocally movable within the first chamber 54 to aspirate liquid into a reservoir forming part of the pipette or formed within a separate tip attached to the pipette, and a second piston 14 movable within the second chamber 57 to expel air therefrom through the valve and into the first chamber to expel liquid from the reservoir, the valve being arranged to open in response to the movement of the second piston. In operation of one embodiment, knob 15 is depressed driving piston 14 into chamber 54 to displace a predetermined volume of air. Release of pressure on knob 15 enables springs 22 and 23 to move piston 14 to the right (as shown in Figure) and aspirate liquid into the pipette tip (not shown). The interior of the pipette to the right of disk 30 will contain air at atmospheric pressure. Liquid is discharged by pressure on knob 15 and during the leftward movement of piston 41, the pressure in chamber 57 overcomes spring 53 and opens check valve 50, allowing the compressed air in chamber 57 to expand into chamber 54 and expel the liquid from the pipette tip.

    PIPETTE TIP PACKAGE
    17.
    发明专利

    公开(公告)号:CA988059A

    公开(公告)日:1976-04-27

    申请号:CA177403

    申请日:1973-07-26

    Abstract: A package of disposable pipette tips in which tapered pipette tips are supported on trays by projecting through apertures provided in the tray and in which the trays have sidewalls that extend downwardly from the tip supporting surface of the tray a distance greater than the distance the pipette tips project through the supporting surface. The sidewalls of the trays may be configured such that the bottom edge of the sidewall of a tray is supported by a shoulder formed in the sidewall of a tray on which the first tray is stacked. When the trays are thus stacked, the pipette tips on one tray project into the pipette tips on the tray below.

    19.
    发明专利
    未知

    公开(公告)号:DE2432086A1

    公开(公告)日:1975-01-23

    申请号:DE2432086

    申请日:1974-07-04

    Abstract: The invention is shown as a two part stand having receptacles for holding test tubes. The first, top part comprises a plurality of vertical receptacles for receiving the test tubes in a close fitting relationship. The second, bottom part is a rack that is interconnected to the top part in an easily detachable manner, and it comprises a base plate and vertical corner posts so that it is possible to look through all four sides of the bottom part of the stand and observe the contents of the test tubes.

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