US 4,538,837 AGranted

Anti-corrosion pipe apparatus

OwnerAllan D. Cronkinventor

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Abstract

An aluminum alloy pipe having a non-corrosible lining coating the interior surface thereof, and an annular sleeve formed of non-corrosible material to fit over and grip an end of the pipe, this sleeve being shaped to cover the end of the material forming the pipe and overlapping and gripping both the interior lining and the outer surface of the pipe. This sleeve fitted on the pipe end will fit within a standard pipe coupling to be gripped thereby.

Claims5

Dependent claims

A pipe assembly, comprising:

(a) first and second coaxial interconnected pipe portions having inner and outer peripheral surfaces and said second pipe portion having an end portion with a wall thickness exceeding the wall thickness of the corresponding end portion of said first pipe portion;
(b) a non-corrosible lining coating said inner peripheral surface of at least said first pipe portion;
(c) an annular sleeve fitted over and gripped to a first end portion of said first pipe portion, said sleeve comprised of a non-corrosible resilient material;
(d) said sleeve comprising concentric radially spaced inner and outer bands joined at adjacent edges thereof by an annular web and thereby forming an annular pocket having an entrance opening away from said web and adapted for receiving said first end portion so that the end thereof seats on said web;
(e) said inner band contiguously disposed for the length thereof in engagement with the radially inner surface of said lining and with said outer band contiguously disposed for the length thereof in engagement with said outer peripheral surface so that fluid flowing through said first pipe portion is prevented from engaging said first end portion;
(f) said outer band extends longitudinally from said web a distance exceeding the distance said inner band extends and said outer band having sufficient thickness so that the outer surface thereof is of an outer diameter substantially equal to the diameter of said outer peripheral surface of said second pipe portion;
(g) an axially extending recess of substantial length disposed in the outer surface of said outer band proximate the end thereof opposite said web;
(h) a gasket sealingly engaged with the outer surface of said outer band and with said outer peripheral surface of said second pipe portion, said gasket having a radially inwardly extending flange engaged with said web and with the corresponding end portion of said second pipe portion for preventing fluid leakage from between said pipe portions when interconnected;
(i) a shield exteriorly surrounding said gasket;
and,
(j) first and second clamp means circumferentially disposed about said sleeve and sufficiently tightened to cause said gasket to grip and thereby engage the outer surface of said outer band and said second pipe portion outer peripheral surface;
(k) said first clamp means aligned with said recess and sufficiently tightened to cause the underlying gasket and shield to press into said recesses and thereby prevent said pipe portions from becoming uncoupled.

9 more elements

Dependencies are inferred from the claim text.

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Abstract

A pipe assembly, comprising:

(a) first and second coaxial interconnected pipe portions having inner and outer peripheral surfaces and said second pipe portion having an end portion with a wall thickness exceeding the wall thickness of the corresponding end portion of said first pipe portion;
(b) a non-corrosible lining coating said inner peripheral surface of at least said first pipe portion;
(c) an annular sleeve fitted over and gripped to a first end portion of said first pipe portion, said sleeve comprised of a non-corrosible resilient material;
(d) said sleeve comprising concentric radially spaced inner and outer bands joined at adjacent edges thereof by an annular web and thereby forming an annular pocket having an entrance opening away from said web and adapted for receiving said first end portion so that the end thereof seats on said web;
(e) said inner band contiguously disposed for the length thereof in engagement with the radially inner surface of said lining and with said outer band contiguously disposed for the length thereof in engagement with said outer peripheral surface so that fluid flowing through said first pipe portion is prevented from engaging said first end portion;
(f) said outer band extends longitudinally from said web a distance exceeding the distance said inner band extends and said outer band having sufficient thickness so that the outer surface thereof is of an outer diameter substantially equal to the diameter of said outer peripheral surface of said second pipe portion;
(g) an axially extending recess of substantial length disposed in the outer surface of said outer band proximate the end thereof opposite said web;
(h) a gasket sealingly engaged with the outer surface of said outer band and with said outer peripheral surface of said second pipe portion, said gasket having a radially inwardly extending flange engaged with said web and with the corresponding end portion of said second pipe portion for preventing fluid leakage from between said pipe portions when interconnected;
(i) a shield exteriorly surrounding said gasket;
and,
(j) first and second clamp means circumferentially disposed about said sleeve and sufficiently tightened to cause said gasket to grip and thereby engage the outer surface of said outer band and said second pipe portion outer peripheral surface;
(k) said first clamp means aligned with said recess and sufficiently tightened to cause the underlying gasket and shield to press into said recesses and thereby prevent said pipe portions from becoming uncoupled.

9 more elements