Abstract: The swivel assembly of the present invention employs a thrust bearing configuration that provides smooth operation under non-axial and axial load conditions. The assembly comprises two opposing bearing surfaces, one on the end of a hose pipe and the other on a bearing race. A cylindrical housing interlocks with the bearing race and includes a flange to keep the bearing surface of the hose pipe in contact with the bearings. Thus, the hose pipe may rotate freely relative to the bearing race and housing. Because only the end of the hose pipe is in contact with the housing or bearings, non-axial bending loads centered in the bearing are resolved through relatively short moment arms thereby reducing friction creating by the non-axial loading condition. A sealing and lubricating thrust washer may be introduced between the flange in the housing and the hose pipe to seal the swivel assembly and to reduce further the friction between the hose pipe and the housing flange and bearing race.

Abstract: Automatic swimming pool cleaning systems are disclosed. The systems include an automatic swimming pool cleaner incorporating one or more curved wipers protruding from its lower surface. The wipers and flat bottom of the cleaner induce a vortex as fluid flows to its central inlet, entraining debris in the flow. A fluted throat surrounding the inlet additionally assists the interior of the base of the cleaner in retaining debris when opened for cleaning, additionally providing an improved flow path for enhanced debris pick-up. Also disclosed is a valve useful for controlling and indicating the rate of fluid flow to a cleaner. Included within the valve is a plunger attached to a spring, with the spring force opposing fluid flow through the valve. Flow sufficient to overcome the spring force compresses the spring, however, thereby moving the plunger within the tube and providing a dynamic indication of the rate of fluid flow.

Abstract: Automatic swimming pool cleaning systems are disclosed. The systems include an automatic swimming pool cleaner incorporating one or more curved wipers protruding from its lower surface. The wipers and flat bottom of the cleaner induce a vortex as fluid flows to its central inlet, entraining debris in the flow. A fluted throat surrounding the inlet additionally assists the interior of the base of the cleaner in retaining debris when opened for cleaning, additionally providing an improved flow path for enhanced debris pick-up.Also disclosed is a valve useful for controlling and indicating the rate of fluid flow to a cleaner. Included within the valve is a plunger attached to a spring, with the spring force opposing fluid flow through the valve. Flow sufficient to overcome the spring force compresses the spring, however, thereby moving the plunger within the tube and providing a dynamic indication of the rate of fluid flow.