| 摘要 |
PURPOSE:To make a speed in a piston stroke vary into two steps, by installing an air feed-exhaust quantity selector valve, capable of selecting an air feed- exhaust quantity itself by being pressed to a piston, inside a cylinder. CONSTITUTION:An air feed-exhaust quantity selector valve 4, capable of selecting an air feed-exhaust quantity itself by being pressed to an output takeoff piston 2, is installed in a cylinder 3. With this constitution, since a throttling diameter of an air passage in a stroke of the piston 2 can be varied with a single air passage selector valve 6 alone, speed in the stroke of the piston 2 can be varied into two steps.
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