Abstract: A valve for safeguarding the outer container of a double wall vacuum-insulated container for low boiling liquified gases against a pressure increase in the insulation space after a loss of vacuum comprises a valve housing fastened in the outer container, a valve plug and an O-ring which, as a result of deformation, act as a sealing element between the valve housing and the valve plug. The dimensions of the valve housing and seal plug causing deformation of the O-ring in the radial direction and the influence of the outside air pressure causing simulataneous deformation in the axial direction.

Abstract: A waste container cover which can be vertically raised and lowered to open and close the container and rolled to either side from the open position. The cover has special tracks which ride on rollers to allow side to side movement of the cover. When the cover is above the opening, notches in the tracks are in registration with the rollers. A sliding plate in each track can be slid until inclined slots in the plate register with the notch and allow the cover to lower onto the container to tightly seal it closed. Crank and screw mechanisms operate the sliding plates. The cover can be tipped alongside either side of the container and is then supported in a vertical position by hook shaped levers which bear on pins on the container top.

Abstract: A ball holder made of resilient material with retention apertures of a slightly smaller size than the ball to be secured within the aperture, with retention of the ball being accomplished by frictional and radial compression forces being exerted upon the ball.