| 摘要 |
A pneumatic cylinder for a power piston is provided with a cushion bore at one end and a cushion plug on the piston which is adapted to enter and cut off said cushion bore at the end of the piston stroke and provide a cushioning pressure area between the piston and said end of the cylinder. A pressure leakage path with a cushion adjusting screw therefor is provided between the cushioning area of the cylinder and the cushion bore. A spring-biased plunger-type control valve is connected at one end with the cushioning area of the cylinder and at the other end with the cushion bore, and responds to a pressure differential therebetween at the end of the piston stroke to provide a pulse output through the valve as a monitoring signal for the cylinder operation.
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