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AssigneeITT Corporation
InventorsCharles V. Flowers, Bernard J. Sass
Estimating the term…
A unitary assembly of tubing and an end fitting. The end fitting comprises a threaded fastener fitting having a tubular bore extending therethrough. An undercut annular groove is coaxially provided in the wall portion of the tubular bore which is spaced apart from the end of the fitting. The opening of the tubular bore at the end of the fitting is provided with an undercut counterbore. The end of the tubing is inserted through the opening and into the tubular bore until it engages a stop formed by a reduced diameter portion of the tubular bore at the axially inward end of the undercut annular groove. A ball mandrel is inserted through the opening at the other end of the tubular bore to engage and force the end portion of the tube into the undercut annular groove. A braze ring is inserted into the undercut counterbore the latter of which allows a braze fillet to form during the brazing operation.
A method for forming a unitary assembly of tubing with a threaded terminating fastener, said method comprising the steps of:
A unitary assembly of tubing with a threaded terminating fastener, said assembly comprising, in combination:
A fitting comprising a head portion formed with a polygonal external shape, said head portion having a through bore and a pair of end faces, said fitting further comprising a tubular connecting portion having a through bore, said tubular connecting portion extending from one end face of said head portion with the through bores being axially aligned, a stop shoulder formed on the tubular connecting portion and extending into its through bore adjacent said one end face of said head portion, said stop shoulder having an inner diameter less than the inner diameter of any portion of said through bores, an undercut groove formed in the through bore of said head portion immediately adjacent said stop shoulder, and a counter bore formed in the other end face of said head portion and a chamfer formed at the intersection of said counter bore and the through bore of said head portion.
Dependencies are inferred from the claim text.