Air spring actuated slider for semi-trailer

An air spring actuated slider pin release system for a semi-trailer slider having a pair of main members extending along a longitudinal axis of the slider, and at least one cross member separating the main members in spaced, parallel relationship to each other, comprising:

• an actuator shaft oriented to extend in generally parallel relationship to at least one of the main members, being connected to said slider for axial rotation, and having a transverse lever arm secured to each end of said shaft for common rotation;
• each said lever arm having an end connected to a retractable, biased lock pin so that rotation of said shaft and said lever arms causes retraction of said associated lock pin relative to the main member;
• said actuator shaft having a normally projecting air spring bracket;
• and
• an air spring disposed between one of the main members and said air spring bracket so that inflation of said air spring acts on said air spring bracket, axially rotating said shaft and said lever arms for retracting said lock pins.