FIELD: pumping devices.
SUBSTANCE: group of inventions relates to suction pump (1) for creating vacuum in a vacuum holding device, to a set consisting of a vacuum holding device and pump (1), and to a method for attaching the device. Pump (1) contains suction tube (4) with hole (28) and a piston that passes into tube (4), which has an internal space for it. At one end, the piston contains a head with a sealing gasket. Tube (4) at the end of a suction channel has one or more ventilation holes. The gasket is made with the possibility to pass by ventilation holes, so that ambient air enters the space for the piston during one suction force. The head contains two sealing washers. At least one recess passes into the second washer from the edge to the center of the first washer. The gasket is located between washers in the form of a sealing ring, which is hermetically adjacent to the first washer when moving along the suction channel and to the second washer when moving the head in such a way that any accumulated air along the sealing ring exits into the recess area.
EFFECT: group of inventions is aimed at creating a technically simple suction pump.
9 cl, 7 dwg
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| 0 |
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SU44744A1 |
