PNEUMATIC DRIVE WITH BRAKING DEVICE Russian patent published in 2012 - IPC F15B15/22 F16K31/122 

FIELD: machine building.

SUBSTANCE: pneumatic drive with a braking device comprises a cylinder, a braking chamber, a piston with a single-sided stem, a controlled throttle, and also a ledge, an inlet hole connecting a piston cavity with a source of gas, and an outlet hole connecting the stem cavity with atmosphere. The ledge is made as covering the stem and is installed on the cover at the side of the stem, besides, the inner diameter of the ledge is equal to the stem diameter, at the same time the ledge end is arranged at the distance equal to the stem travel χ_st., in the stem on its axis there is a dead hole, the outlet of which at the side of the end opposite to the piston is connected to atmosphere, and at the distance ℓ from the piston end facing the stem there is an inlet through hole, which is perpendicular to the axis of the dead hole, at the same time a pneumatic distributor installed at the inlet to the piston cavity is made in the form of an injection nozzle connected directly to a throttle of permanent cross section, and at the outlet of the stem cavity there is a controlled throttle installed on the outlet hole.

EFFECT: invention makes it possible to control speed of pneumatic cylinder piston movement along with the stem travel.

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