Patent ID: 7156370

Claim:
Gas cooking appliance adapted for a supply with different types of gaseous fuel, natural gas (NG) or liquefied petroleum gas (LPG), equipped with one or more regulating valves ( 3 ) of the rotary regulator organ ( 6 ) type, comprising: a regulating valve ( 3 ) having a valve body ( 3 a ) provided with a housing for the regulator organ ( 6 ), an inlet conduit ( 4 ) and an outlet conduit ( 5 ), and an actuating shaft ( 7 ) mounted salient from a control panel ( 2 ) on the cooking appliance ( 1 ), wherein a regulated gas flow “Q” is directed towards the outlet conduit ( 5 ) to a cooking appliance burner adapted to one of these types of gas, said rotary regulator organ ( 6 ) provided with a revolution peripheral surface and various peripheral through openings ( 16 – 19 ) for the passage of a regulated flow “Q” to a central chamber ( 8 ) in communication with said outlet conduit ( 5 ), the passage openings being superimposed in alignment with said inlet conduit ( 4 ), successively in function of a respective angular position of the regulator organ ( 6 ), wherein, starting from an initial valve closed “OFF” position (A 1 ,A 1 /A 2 ,A 2 ,A 3 ), in accordance with each one of said angular positions (A 1 ,A 1 /A 2 ,A 2 ,A 3 ) of the regulating organ ( 5 ), three different possible flows, a constant maximum flow “Qmax”, a constant minimum flow “Qmin”, and an intermediate flow “Qint” between them, are supplied to the outlet conduit ( 5 ), in function of the area of the through opening ( 16 – 19 ) facing the inlet conduit ( 4 ), said actuating shaft ( 7 ) provided with a means ( 13 ) for guiding the angular travel (A 3 ) of the regulator organ ( 6 ), interacting with a rotation stop means ( 12 a ) in the valve body ( 12 a ), an interchangeable control knob ( 9 ) fitted at the free end of the actuating shaft ( 7 ), provided with a integral means ( 14 ) for guiding said angular travel (A 2 ) and interacting with a rotation stop means ( 20 ) in the control panel ( 2 ) of the appliance, wherein said rotation stop means ( 12 a ) in the valve body ( 12 a ) determines an angular position A 2 of the regulating organ ( 6 ), for the supply of a first flow Qmin through one of said openings ( 18 ), calibrated for one type of gas (NG), and said rotation stop means ( 20 ) in the control panel ( 2 ) determines an angular position A 3 successive to the prior position A 2 , for the supply of a second flow Qmin for another type of gas (LPG), through a second calibrated opening ( 19 ) spaced apart from the former.