Abstract: A whirlpool bath designed for use in hospitals and similar institutions has a tub which is raised sufficiently above the floor level on a recessed steel base so as to allow a vertical clearance for the use of trolleys and mobile patient-handling equipment to move patients toward and lower patients into the whirlpool bath. The recess also makes work around the tub easier for attendants, providing toe room allowing the attendants to move closer to the tub. Bumper strips and base moldings are attached to the whirlpool bath to protect the bath from damage from movable patient-handling equipment. The sides and ends of the tub have removable panels fitting under the rim of the tub and clipping to a steel frame for rapid and easy removal and replacement. A capped opening in the built-in plumbing allows the water supply from a wall-mounted mixing valve to be admitted directly to the tub through the whirlpool fittings as an alternative to a spout or hose.

Abstract: A cartridge filter unit particularly adapted for use in a swimming pool water purification system because of its modular design, includes a readily accessible filter body. By removing a cover, a core assembly including a solids entrapping device and an inexpensive, disposable filter cartridge contained therein may be easily withdrawn for cleaning or replacement without allowing solid pollutants collected by the filter to re-enter the system.