Abstract: A valve receptacle is disclosed, the valve providing a fluid seal when the valve is closed at atmospheric temperatures and at temperatures encountered as a result of exposure to cryogenic fluids. The valve receptacle comprises a valve receptacle housing; a seal piston disposed within the receptacle housing; a projecting flange of the seal piston engaging a seal inclined surface; and a seal piston guide comprising a first hollow cylinder and a second hollow cylinder interior of the first hollow cylinder, and a connecting member connecting the hollow cylinders. The piston rod is slidably moveable within the interior hollow cylinder. Abutment of a piston rod shoulder with the inner hollow cylinder limits the extent of lateral movement of the piston seal.

Abstract: A locking device is provided for a pickup truck tailgate having a conventional latching mechanism of the type comprising spring-loaded plungers engaging plunger receivers in the truck body, draw bars connecting the plungers to a scissor-plate latching mechanism the upper ends of the scissor plates being rotated toward each other to release the plungers. The locking device comprises a blocking paddle for removable insertion between the scissor plates of the latching mechanism, the blocking paddle being rotatably mounted on a spindle with attached spring means normally orienting the blocking paddle away from the scissor plates, the blocking paddle and spindle being attached by mounting members to the tailgate body. The locking device further comprises a lock attached to the tailgate body having a lock cylinder, the lock cylinder being beveled at the end opposite the lock key insert.

Abstract: A chemical feed-transport unit for transporting water-treating chemicals and introducing them into a water supply comprises a cylindrical tank with semispherical top and bottom supported on a metal transportable skid. The tank has a flanged top opening with removable cover and a top inlet for introduction of water for flushing and cleaning the tank. The tank has a chemical-resistant, plastic lining to prevent chemical attack to the walls thereof. The bottom of the tank has inlet and outlet openings with valves controlling water flow therethrough and an outlet opening for draining the contents during the flushing and cleaning operation. The supporting metal skid is rectangular in shape with channel members forming the sides and sheet metal plates forming the top and bottom thereof. The edge walls of the skid (walls of the channel members) have slots therein sized and spaced to receive the lifting members of a fork-lift apparatus.