The Hansen Manufacturing Co.

Bert W Manning

James F Norton

A container is utilized to hold fluid under pressure and has a non-circular arcuate opening. A cover member is movable from an open position through the opening to a closed position in which a seal on the cover member sealingly engages a wall of the container. The cover member has an arcuate non-circular configuration corresponding to the configuration of the container opening. When the cover member is moved to the closed position, it may be skewed relative to the container opening so that portions of a side wall of the cover member are spaced relatively close to a side wall of the container while other portions of the side wall of the cover member are spaced relatively far from the side wall of the container. An improved seal is utilized to prevent leakage of fluid under pressure from inside of the container around the skewed cover. This seal includes a body portion which circumscribes the cover member and is disposed between a rim of the container wall and a rim of the cover member. In addition, the seal has a lip portion which is exposed to the fluid pressure in the container and is urged into sealing engagement with the inner surface of the container wall by the fluid pressure. This seal construction provides for sealing engagement between the body portion of the seal and the lip portion of the seal in the areas where the side wall of the skewed cover is spaced a relatively large distance from the side wall of the container. The lip portion may advantageously be provided with a bead which projects toward the container wall to promote sealing engagement of the lip portion with the container wall, particularly at relatively low container pressure.

Growing community of inventors

Bay Village, OH, United States of America

Bert W Manning