| 摘要 |
Pneumatic piston-cylinder apparatus of single acting type, which performs a working stroke in one working direction and which is returned to the initial position for the working stroke with any external supply of compressed air, and comprising a cylinder part having a cylinder jacket (1), a front end (2) and a rear end (3), and a piston (5) which is reciprocatable in the cylinder, and in which means (39) for supply of compressed air are connected only to the rear end (3), and in which the cylinder (1, 2, 3) is formed with means (10, 25, 4) for draining the air from the unloading side (26) of the piston (5) during the working stroke of the piston, and means (4, 9, 26, 29, 30) for building up a reserve supply of compressed air at the unloading side (26) of the piston (5) close to the end of the working stroke, which pressure is utilized for returning the piston to its initial position for working stroke.
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