PNEUMATICALLY OPERATED DEVICE HAVING CHECK VALVE VENT

摘要

A pneumatically operated device. The pneumatically operated device comprises a movable member disposed within a housing. The movable member is operable to control operation of the device. Pressurized air is directed to a first side of the movable member to drive the movable member in a first direction to operate the device. The pneumatically operated device comprises a check valve disposed through an opening in the housing to enable air to vent from a second side of the movable member. The check valve may comprise a flexible cover extending over the opening and biased against the housing to form a seal.