Pipe joints or couplings – Materials – Sheet
Patent
1987-12-08
1989-07-11
Arola, Dave W.
Pipe joints or couplings
Materials
Sheet
285 45, F16L 5500
Patent
active
048465127
ABSTRACT:
A protective cylinder (3) for pipe insulation. The protective cylinder (3) is cut at the rear side of the upper part of a folded section of one edge through a predetermined vertical distance 1.sub.1 from the upper end of a first longitudinal edge. The cut extends obliquely downwardly and outwardly at the front by the same vertical distance 1.sub.1 along a first guide line (9) obliquely downwardly and outwardly extending from a first radius portion (9a) at the upper end of the one edge, to an outside bent portion, to form thereby a first engagement portion extending along the first guide line. This serves as both a fitting guide and a rotation stopper. The cylindrical member also has a second longitudinal edge cut slightly obliquely outwardly and downwardly at the upper part thereof by a predetermined vertical distance 1.sub.3 from a second radius portion (10a) at the upper end of the other edge spaced at a horizontal distance 1.sub.2 from the second longitudinal edge. The cut extends along a second guide line (10b) slightly obliquely outwardly and downwardly from the second radius portion (10a), to form a portion of the second longitudinal edge downwardly spaced by the distance 1.sub.3 from the upper end with a second engagement portion with a vertical length 1.sub.4 serving as at least a rotation stopper.
REFERENCES:
patent: 1051461 (1913-01-01), Smith
patent: 1301096 (1919-04-01), Brockest
patent: 3071214 (1963-01-01), Steinbichler
patent: 3233927 (1966-02-01), De Whirst
patent: 3361147 (1968-01-01), Timmons
patent: 3479073 (1969-11-01), Collins
Arola Dave W.
Yamato Kogyo Kabushiki Kaisha
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