Cooking top with improved gas top burner

摘要

A gas burner for use in cooktops including a lower body, a top cap closing said lower body on top, two coaxial flame rings having the same diameter, but extending at two different heights, a single gas injector, a single Venturi tube, and a single expansion chamber for the gas issuing from said single Venturi tube, said chamber being adapted to supply said two flame rings of the burner. The burner further including a first cylindrically-shaped hollow annular member adapted to be applied vertically upon said lower body, and a second substantially planar hollow annular member adapted to be applied upon said first annular member and support said cap. The lower flame ring is supplied with gas from said expansion chamber via a plurality of ducts arranged within said first cylindrically-shaped annular member. Said two flame rings are provided with gas outlet ports having same or similar cross-section areas.

主权项

1. A gas burner for cooktops comprising:
a lower body; a top cap, which closes said lower body on top; a first cylindrically-shaped hollow annular member adapted to be independently applied upon said lower body; a second substantially hollow annular member adapted to be independently applied upon said first annular member; an upper coaxial flame ring and a lower coaxial flame ring, the upper and lower flame rings having a same diameter but extending at two different heights, the flame rings having gas outlet ports arranged peripherally along the flame rings, wherein the gas outlet ports provided along said upper and lower flame rings have a same or similar cross-section area; a single gas injector; a single Venturi tube comprising a vertical convergent portion and a single expansion chamber for gas issuing from said single Venturi tube, said chamber being adapted to supply said upper and lower flame rings of the burner; and a plurality of pilot flames affecting said lower flame ring, wherein the pilot flames are obtained by means of an upper contour of an outer rim of said first cylindrically-shaped hollow annular member, wherein the lower flame ring is supplied with gas from the expansion chamber via a plurality of ducts which are arranged within an outer portion of said first annular member, and wherein an upper side of the gas outlet ports in the lower flame ring is delimited by said second annular member.