AIR ACTUATOR

摘要

An air actuator (1) adapted to be located between a pair of spaced members (2,3) for moving said members with respect to each other includes a hollow (10) body formed of an expandable non-reinforced polyurethane. The body has an ellipsoidal shape and terminates in a pair of curved closed ends (20,21) and has an interior pressure cavity (11) for receiving and discharging a pressurized fluid for expanding and contracting the body. The body is formed of at least two half members (5,6) of non-reinforced polyurethane by either a pair of longitudinal seams (8,9) extending generally parallel to a longitudinal axis of the body or a single circumferential seam. An air tube connector (23) is mounted in one of the closed ends (21) of the body for connecting the interior cavity to a source of pressurized air.