| 摘要 |
A driving device for tattoo, dermographia and the like machines comprises a hollow body encompassing a contoured piston including a piston stem and associated with a resilient element, the contoured piston including a side cut-out which, during a reciprocating movement of the piston, is alternately communicated with a pressurized air inlet hole and a pressurized air outlet hole formed on a side of the hollow body, the inlet hole communicating with a pressurized air source, thereby as pressurized air is fed through the inlet hole the piston is lowered and the resilient element is tensioned whereas, as the piston is arranged at a lowered position thereof, pressurized air in the cut-out exists thereby releasing the piston to allow it to be recovered, by the resilient element, to a starting top position therefrom a new tattoo operating cycle may be started again.
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