Gas valve

Abstract

The present patent prescribes a new “GAS VAL VE”, according to which the valve, instead of having two different internal components that work with only one type of gas feed each, now has internally a component that simultaneously works with two types of gas, being that for such, one simply needs to change its position on the inside of the valve.

1 ) “GAS VALVE”, being that this valve is the type made up of a tubular body ( 1 ) in the form of a “T,” whose vertical limb ( 1   a ) perforates and, by a clamp ( 1   b ), is fastened to stove's gas feed pipe, which can be natural gas or GLP (liquid petroleum gas), characterized in that by the horizontal limb ( 1   c ) of the body ( 1 ) progresses by three staggered internal passages ( 1   d ), ( 1   e ) and ( 1   f ), this last configuring the valve's gas output mouth, going towards the respective stove burner; said body ( 1 ) is equipped with a small upper orifice ( 1   g ), in which a corresponding lock pin ( 2 ) is put; inside the body ( 1 ), there is housed a cylindrical seal seat ( 3 ), made out of resilient material and internally conical, equipped with a lower orifice ( 3   a ) in alignment with the lower vertical limb ( 1   a ) of the body ( 1 ); exactly on the inside of the aforesaid seal seat ( 3 ), there is a metal cone ( 4 ), with an open slot ( 4   c ) and depression ( 4   d ), and suitably coupled to the metal control rod ( 5 ), being that between these two parts there is an expansion spring ( 6 ); the cone ( 4 ) is equipped with two diametrically arranged projections ( 7 ) and ( 7   a ) having different widths, which fit into corresponding slots ( 8 ) and ( 8   a ) on the following cylindrical passage ( 5   a ) of the control rod ( 5 ); there is a closure part ( 9 ), with an open bottom ( 9   a ), for passage of the control rod ( 5 ) to outside, until it reaches and goes through the stove's front panel, where the usual control knob for the respective burner is fit on; the control rod ( 5 ) has a cylindrical passage ( 5   a ) that delimits the formation of the three stop points ( 5   b ) for the valve's lock pin ( 2 ), after the same goes through the orifice ( 1   g ) of the body ( 1 ), thus locking the three positions of the control rod ( 5 ) and consequently the valve, in either the completely closed position, maximum flame position or minimum flame position; the cone ( 4 ) delimits the formation of the internal chamber ( 10 ), conspicuously small, developed in the three passages with staggered, decreasing internal diameters, being that on the inside of this chamber is where the selector ( 11 ) is placed, surrounded by a seal ring ( 12 ), which constitutes the element responsible for tuning the valve to the natural gas feed position or GLP (liquid petroleum gas) feed position; said selector ( 11 ), basically cylindrical, is developed in three short passages, a central passage ( 11   a ) and two end ones, a back passage ( 11   b ) and a front passage ( 11   c ), said selector being able to rotate inside the aforesaid internal chamber ( 10 ) on a course determined by sliding the tab ( 13 ) on the medium passage ( 1   a ) in the corresponding circular depression ( 14 ) in the cone ( 4 ), being that said course is limited by the rim of the aforesaid tab ( 13 ) at one end or the other end of the circular shoulder ( 15 ), also in the cone ( 4 ) as a prolongation of the depression ( 14 ), being that these ends configure limiting stops for turning the selector ( 11 ) in one direction or the other; said selector ( 11 ) has a chamfered reentry ( 16 ) in its back passage ( 11   b ), which, depending on the selector's position, may or may not be aligned with a minuscule slanted orifice ( 17 ) set in the cone ( 4 ), either delimiting or not delimiting the formation of a second gas passage channel, in addition to the one usually delimited by the internal configuration of the aforesaid cone ( 4 ); said selector further has a groove ( 18 ) in its opposite front passage ( 11   c ) for fitting the tip of a screwdriver introduced through a passage orifice ( 19 ) going through the control rod ( 5 ), at the time the position of the aforesaid selector ( 11 ) needs to be changed, depending on the type of gas feed in the stove.