Patent ID: 6487931
Filing Date: 2002-12-03
Classification: F15B,Y10T

Abstract:
An escapement cylinder comprising:two pistons, i.e., a first and a second pistons arranged in parallel within a cylinder body; two piston rods, i.e., a first and a second piston rods, which are extended in parallel from the two pistons, of which front edges are projected to the outside of the cylinder body and which has hollows for locking therein; head side pressured chambers and rod side pressured chambers, which are comparted and formed on opposite sides of the respective pistons, respectively; ports for supplying a pressured fluid separately to the two head side pressured chambers; two communicating paths for communicating the head side pressured chamber of one piston with the rod side pressured chamber of other piston when one piston moves to a forward edge by supply of the pressured fluid to the head side pressured chamber; and a rod holding unit plate, which is supported by a pin between the two piston rods oscillatably and has engaging units at portions facing to respective piston rods, respectively, to operate such that one engaging unit is in sliding contact with a side surface of at least one piston rod and the oscillation of the at least one piston rod is regulated during one piston rod is making forward or is setting back and at the same time, other engaging unit is engaged in a hollow of other piston rod located at the forward edge to regulate the returning operation of the other piston rod.