Excess pressure valve for a boiler of a steamer for the steam treatment of food

Claim 1

An excess pressure valve for a boiler of a steamer for the steam treatment of food, which includes a pipe leading outwards from the inside of the boiler and whose external end portions have an annular sealing face, a conical valve body which closes the pipe to the outside and has a packing ring for engaging the sealing face, characterized in that said pipe includes means defining a constriction extending across said pipe and positioned adjacent said annular sealing face; said valve including: an elongated shaft extending through said constriction means, one end of said shaft having an enlarged portion for engaging said constriction means and limiting movement of the valve body relative to said constriction means, and the other end of said shaft having a reduced diameter intermediate section and a smaller reduced diameter end section; and said valve body having: a tapered block member that defines a central aperture constructed to interfit with the intermediate first reduced diameter section and be positioned between the shaft body and said second smaller end section, said block member having a periphery for engaging said pipe; a collar secured to the smaller end section of the shaft for cooperation in securing the block on the intermediate diameter section; tubularly-shaped shoulder means for engaging said collar, cooperating in retaining said block in position and defining cap engaging means; and cap means for engaging said annular face and supporting said valve body in sealing position against said annular face, said cap means including a central aperture for engaging said shoulder means and securing said cap means thereto.