Patent ID: 7789105

Claim:
A gas pressure regulator comprising: a main body having a first, gas inlet pipe and a second, gas outlet pipe; a calibrated gas passage through which the gas flows from the first pipe to the second pipe; a shutter housed at least partially in the main body and mobile to adjust the opening of calibrated passage between an end position in which the passage is fully open and an end position in which the passage is closed; the shutter, when at the closed end position, engaging with a locating groove; a silencing element located at the calibrated passage to reduce the noise produced inside the pressure regulator, the silencing element comprising a substantially cylindrical wall having a plurality of openings through which the gas passes; and at the gas passage, an axially symmetric body for housing the silencing element, the axially symmetric body comprising a peripheral wall with a plurality of windows through which the gas passes, and the locating groove being integral with the axially symmetric body.