Abstract: A pressure vessel arrangement including a lid with shiftable lock arms and a vent combination operating simultaneously. The lock arms passing through openings in the vessel housing sidewall when the lid is in the closed position. As the lock arms are shifted into a locked position a vent shaft into the vessel housing is sealed for pressurization of the vessel. Upon opening, the vent shaft is unsealed prior to disengagement of the lock arms to vent any residual pressure is the vessel safely.

Abstract: A filter bag which is for use in a liquid filter and which includes a liquid impervious shape-retaining edge portion defining the opening into the filter bag. The edge portion includes an annular inverted V-shaped part which terminates in an annular upturned lip part. The inverted V-shaped part of the filter bag edge portion allows the bag to be placed over a protruding upwardly directed lip in the filter housing while, optionally, the upturned lip part of the bag's edge portion permits the bag to be fitted into the filter housing with the lip part being restrictively fitted between a shoulder or support and an overlying lip formed in the filter housing. Further, the upturned lip part of the filter bag can be wedged into a filter housing to secure the bag independently of the filter top.

Abstract: In a filter for liquids including a housing which suspends multiple filtering elements and a cover. A grid is carried by the lower peripheral edge of the cover which overlies and holds the filtering elements in place when the cover is in sealing contact with the filter housing.

Abstract: A bag clamp assembly for a liquid filter wherein the clamp part of the assembly includes a cap and ring secured together by lock parts. The filter bag of the assembly is clamped between the rim and the cap to form a liquid-tight seal about the opening edge of the bag.

Abstract: A hinge assembly for a filter housing cap. The hinge assembly also serves as a hold-down for the cap. With securing devices loosened, the cap may be lifted from its closed position and remain connected to the housing.

Abstract: A filter having a housing in which a filtering medium such as a rigid screen and removable bag is located. A removable, hollow closed container is located within the filter housing inside the filtering medium. A spring is compressed between the container and the top of the filter to cause the container to be pressed into contact with the filtering medium.

Abstract: A liquid filter having a housing which includes a chamber enclosed by a cap. A filter is positioned within the chamber and includes a flange which makes a hermetic seal with the housing.

Abstract: A liquid filter having a housing which includes a chamber enclosed by a cap. A reticulated basket is fitted within the housing chamber and supported by the housing. A filter bag is positioned within the reticulated basket and includes a flexible flange which engages the housing to secure the bag within the basket without the aid of the filter cap.