US Patent 7461669 Seat keeper

A faucet valve cartridge for controlling fluid flow through a dual-handle faucet, including a valving member supported within a valve body for rotation about a longitudinal axis. A first sealing surface and a first inlet opening is supported by the valving member. A seat includes a second sealing surface and a second inlet opening. The first inlet opening is configured to be in selective fluid communication with the second inlet opening upon rotation of the valving member. A retainer couples the seat to an outer wall of the valve body.