Abstract: A water filter apparatus includes a housing having a horizontally-disposed base unit. A coupling upstands from one end portion of the base unit and is attachable to a faucet for receiving a supply of water. An outlet is downwardly directed from the base unit to discharge water received through the coupling. Also disposed within the base unit is a valve that selectively permits the flow of water through the coupling and in discharge from the outlet. Upstanding from another portion of the base unit is an inverted cup-shaped cap. An input fluid channel within the base unit leads from the valve to the chamber defined by the cap, and the valve selectively permits the flow of water through the coupling into the input channel and from that into the chamber. A filter cartridge disposed within the cap has an inlet opening communicating water from the input channel to the filter material.

Abstract: In a fluid-flow pulsator, a housing has a chamber with an inlet and an outlet. Within the housing is a piston assembly having first and second pistons with the first having a working area less than that of the second. A valve associated with the assembly closes the outlet on movement of the assembly. The assembly is resiliently urged in a direction effecting closure of the outlet with the first and second pistons effectively being disposed in the chamber on opposite sides of the inlet. The introduced fluid pressure, the urging strength and the piston areas are correlated so as to produce pulses of fluid from the outlet in response to a supply of fluid to the inlet.