Abstract: A remotely activated tank hatch system includes 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 a hatch is coupled to the upper frame. The hinge assembly allows the upper frame to pivot the hatch between open and closed positions. The lower 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 toward the upper frame 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.

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.

Abstract: A remotely activated tank hatch system includes 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 a 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 lower 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 toward the upper frame so that the hatch may be swung away from the opening. Inflating a rubber 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 opening and closing the hatch.

Abstract: A remotely activated tank hatch system is provided. The hatch system may include a frame that may comprise an upper frame and a lower frame that are 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 relative to the opening. The frame may also include at least one catch that is intended to receive an edge of the hatch, when the hatch is closed. A plurality of spring members on the upper frame urge the hatch upward and away from the tank opening. This provides a space between the opening of the tank and the hatch so that the hatch may be swung away from the opening. A rubber bladder may be positioned between the upper frame and the hatch. Inflating the bladder overcomes the spring pressure and urges the hatch into tight contact with the port of the tank.