Patent ID: 8424837
Filing Date: 2013-04-23
Classification: F16K

Abstract:
1. A shut-off valve of a fluid comprising a valve body defining at least one entry passage and at least one exit passage for a fluid, an obturator housed in said valve body and rotatable around a rotation axis, a command organ operatively connected to the obturator by means of a command stem which extends in an aperture made in a cylindrical projection of the valve body, wherein the command organ comprises a cylindrical portion which overlaps at least partially the outer lateral surface of said cylindrical projection of the valve body, wherein from said outer lateral surface of the cylindrical projection of the valve body at least one blocking tooth extends radially, and wherein, on the inner side of the cylindrical portion of the command organ, an annular recess able to house the blocking tooth so as to allow the rotation of the command organ around the cylindrical portion of the valve body, and a counter-blocking tooth able to angularly engage the blocking tooth so as to block the rotation of the command organ are provided reciprocally distanced in height along the main axis of the cylindrical portion, the command organ being axially movable in relation to the cylindrical projection between an operative position, wherein the blocking tooth is located in the annular recess of the cylindrical portion, and a blocked position, wherein the blocking tooth engages the counter-blocking tooth, wherein a ring nut is inserted in the cylindrical projection of the valve body to guide and support the command stem, and said shut-off valve includes elastic means that comprise a spring inserted between the ring nut and the inner apex of the cylindrical portion of the command organ.