Patent ID: 7121299

Claim:
A regulator valve with a flow indicator for a hot-water heating system, comprising: an intake duct ( 13 ) for conveying water into the valve; a tubular body ( 20 ), projecting externally, of a material which is at least partially transparent and has an internal cavity ( 21 ); a flow indicator rod ( 40 ), slidable inside the valve, with a lower portion housed in the intake duct ( 13 ) and an upper indicator portion housed in the internal cavity ( 21 ) of the transparent body ( 20 ) wherein the indicator portion has a first upper area ( 46 ) for indicating that no water is flowing and a second, lower area ( 47 ) for indicating that water is flowing through the intake duct ( 13 ); a rotatable knob ( 18 ) for regulating the flow of water through the intake duct ( 13 ) by means of a shutter, which has the shape of a conical head ( 41 ) and which corresponds to the lower portion of the indicator rod ( 40 ); a tubular element ( 30 ) of the valve coupled axially by threaded means ( 42 ) to the transparent body ( 20 ) which is secured to the knob ( 18 ) so as to adjust the position of an abutment surface ( 48 ) of the rod ( 40 ) and thereby control the aperture of the valve; the valve being capable of taking the following operational conditions: a closed condition in which the transparent body ( 20 ) is lowered so as to hold the rod ( 40 ) in a position closing the duct ( 13 ); an at least partially open position, in which the transparent body ( 20 ) is raised so as to allow the rod ( 40 ) to reach a raised position, when water is flowing through the duct ( 13 ) and the second portion ( 47 ), indicating this flow, is visible through the transparent body ( 20 ) and a lowered position, when no water is flowing through the duct ( 13 ) and the first area ( 46 ), indicating an absence of water, is visible through the transparent body ( 20 ).