Remotely activated tank hatch system

Abstract

A remotely activated tank hatch system includes a frame having an upper frame and a lower frame joined by a hinge assembly. The lower frame is coupled to a collar of an opening of a tank and the hatch is coupled to the upper frame. The hinge assembly allows the upper frame to pivot the hatch between an open and closed position. The frame includes at least one catch to receive an edge of the hatch, when the hatch is closed. Spring members on the upper frame urge the hatch away from the collar so that the hatch may be swung away from the opening. Inflating a bladder positioned between the upper frame and hatch overcomes the spring pressure and urges the hatch into tight contact with the collar. The hatch system includes a remote control for inflating the bladder and for opening and closing the hatch.

Dependencies are inferred from the claim text.