| 摘要 |
<p>In a hydromassage fitting (10) a first sleeve (54), a jet generator mounted on an orientable spherical body (12) and containing an axially movable nozzle (60),actuated by an external actuator (82), said nozzle being retracted under the control of said external actuator (82) to leave a passage space for the jet water, said nozzle (60) comprining a non return valve (100) adapted to permit the flow of fluids from inside to outside of the nozzle but not viceversa, thus acting as a check valve to prevent the backflow of water from a tub served by said fitting (10) to the air pipings of said fitting, said nozzle (60) cooperating with the sleeve (54) to prevent, in the extended position, the backflow of water from said tub to water circulation circuits of said fitting.</p> |
