Linear motor with cylinder chamber connected to feed valve - has additional ventilation bore near choke bore acting with closure

摘要

Linear or oscillating motor, especially a single acting motor, whose cylinder chamber is connected to the valve feeding the pressure medium via a choke bore and whose piston is pressed back into the output positon by a resetting device. There is an additional ventilation bore near the choke bore and this acts with a closure, which shuts the ventilation bore on moving out the piston under loading by means of the pressure medium or an additional spring. It releases on piston return for the common connection with the choke bore to the valve. The closure is in an elastic material with a gap, whose width corresponds to the sum of the cross-sections of the choke bore and the ventilation bore.