Press driven tool actuator module

A hydraulic actuator for at least one hydraulically powered device comprising:

• a hydraulic cylinder having a body with a cylindrical bore formed in the body and at least one outlet passage constructed to communicate with a hydraulically powered device;
• an actuator sleeve closed at one end and slidably received for reciprocation within the bore of the body between retracted and advanced positions, a piston slidably carried by the sleeve to permit movement between a first position spaced from the closed end of the sleeve and a second position adjacent to the closed end of the sleeve, the piston being yieldably biased towards it first position, a stop carried by the body to retain the actuator sleeve in the body when the actuator sleeve is in its retracted position;
• and
• a hydraulic chamber defined between the body and the piston, constructed to contain a hydraulic fluid therein and communicating with the outlet passage whereby when the actuator is moved toward its advanced position, the hydraulic fluid in the hydraulic chamber acts on the piston against its bias and may displace the piston relative to the actuator to thereby limit, at least until the piston reaches its second position, the maximum pressure within the hydraulic chamber.