초록 ▼

A flexible gas tight pipe coupling has interengaging pipe sections, an end portion of one of which is expanded to form a spheroidal barrel, and an end portion of the other of which is inserted in the barrel and itself expanded to form a spheroidal barrel loosely trapped within the first barrel. A be

A flexible gas tight pipe coupling has interengaging pipe sections, an end portion of one of which is expanded to form a spheroidal barrel, and an end portion of the other of which is inserted in the barrel and itself expanded to form a spheroidal barrel loosely trapped within the first barrel. A bellows and a protective tubular braid are secured to the pipe sections to provide a gas tight cover over the coupling.

대표청구항 ▼

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A flexible gas tight pipe joint comprising a first pipe section of ductile metal having a first end portion expanded into a first spheroidal barrel, having an end orifice of predet

[ The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:] [1.] A flexible gas tight pipe joint comprising a first pipe section of ductile metal having a first end portion expanded into a first spheroidal barrel, having an end orifice of predetermined diameter at an open end of said end portion and a maximum internal diameter greater than the diameter of said end orifice, a second oppositely directed pipe section of ductile metal having a second end portion initially of lesser external diameter than said end orifice of the first end portion, said second end portion having been inserted within said barrel and expanded therein to provide a second spheroidal barrel of maximum external diameter less than the maximum internal diameter of the first barrel, but greater than the diameter of said end orifice, and an external gas tight bellows connected to said pipe sections outwardly of said end portions to provide a gas tight connection between pipe sections; wherein the bellows is secured at its ends to said pipe sections by rings surrounding the ends of the bellows, and by portions of said pipe sections expanded within said ends and said rings.