Abstract: A pressure vessel includes a lid being rotatable into an unlocked position by a first actuator and then raised vertically above its housing by a second actuator secured along the housing. A pressure safety latch is provided to both vent the vessel before the Hd is moved into its unlocked position and release the lid for unlocking rotatable movement.

Abstract: This invention relates to a liquid filter having a housing and a top. The housing includes an inwardly protruding annular shoulder which supports a filter basket. Forming a part of the housing and located above the annular shoulder is a tapered protrusion over which a filter bag is press fitted and snapped under so as to be suggested against the underlying annular shoulder.

Abstract: A magnetic filter removes magnetic particles from fluid communicated through the filter. The filter includes elongated, circumferentially spaced magnetic elements which capture magnetic particles entrained in the fluid. The magnetic elements must be cleaned periodically to remove the particles from the elements by moving a scraper plate from one end of the housing to the other. At the end of travel of the scraper plate, the particles are scraped upon non-magnetic end portions (which may contain residual magnetism) of the magnetic elements, from which they are flushed by fluid communicated through the inlet port out through other ports provided on the housing.

Abstract: A filter element for a swimming pool cleaner includes a pair of pouches which are received within cavities defined within the pool cleaner housing. The outer edges of the filter element are attached to corresponding edges of the housing by releasable clips. Water is drawn through apertures in the bottom of the cleaner through the filter element and into a motor driven pump, with large debris remaining in the pouches and particles entrained in the pool water being caught by the filter element.

Abstract: A filtering system for swimming pools includes a cylindrical filter housing in which a filter bag is supported in a perforated liner. A skimmer housing is mounted on the cylindrical housing and skims water off of the surface of the pool, which communicates to the inlet chamber through a perforated skimmer basket which catches debris floating on the surface of the pool water. The main drain of the pool is connected directly to the inlet chamber. An outlet of the cylindrical housing communicates directly with the inlet port of a pump that returns filtered water to the pool.

Abstract: A liquid filter includes a housing and a filtering bag supported within the housing to remove soiled matter from processed fluids being filtered. The filter bag includes a rim and a pouch made out of a flexible material which is secured to the rim by a series of circumferencially spaced intermitted bonds. The bonds capture horizontal fibers of the filter bag as well as vertical fibers, thus resulting in a stronger bond and making it less likely a rupture will occur at the bond when stress is applied to the filtering bag, such as occurs when the bag is being removed from the housing during bag change over.

Abstract: A method of removing a self-retaining filter bag from a filter housing by flexing the upper margin of the bag to free the bag from the housing and then withdrawing the bag from the housing.

Abstract: An insert carrying cartridge filtering element for use in converting a liquid filter from a bag-type filter where fluid entering the filter flows into a bag and is strained through the bag to a cartridge-type filter where fluid entering the filter passes through the cartridge filtering element and exits the filter.

Abstract: A liquid filter with a unitary lid to housing seal and filtration bag. The seal is used as a gasket between the filter housing and the lid and is attached about the open upper end of the bag.

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: An improved fluid filter housing and filter bag seal wherein the filter bag includes an annular downturned lip of flexible, shape-retaining material which in part defines an opening into the bag. The housing carries an annular rim in part defining an opening into the housing. The bag lip is forced into sealing engagement with the housing rim by the housing cap to form a fluid-tight seal.

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.

Abstract: A filter including a housing spanned by a cap. A liner constituting a filtering medium is fitted into the housing with the outer surface of the liner contacting the inner surface of the housing. A wall member supports one end of the liner within the housing. Liquid is introduced into the filter housing through an inlet port where it passes through the liner and out openings formed by the wall member at one end of the liner.

Abstract: A filter which includes a container-shaped housing having a top wall with multiple openings therein. A filter element is fitted into each housing top wall opening. A cover having an offset portion spans the housing top wall with the offset portion thereof being located spacedly above each of the filter elements. The filter housing includes a liquid outlet. A liquid inlet is provided which directs liquid into the space under the offset portion of the cover. The liquid then passes downwardly through the filter elements, into the interior of the housing, and out the liquid outlet in the housing.

Abstract: A method of filtering and a filter having a housing in which a filtering screen having a bag-shaped configuration is located. A removable floatable container is located within the filter housing, inside the filter screen. The container includes parts which are spacedly positioned from the screen so as to enable liquid flow through the filter to pass around the container and through portions of the screen.