Ferrule

Details Ferrule Ferrule

1997-04-28

1999-05-04

Arola, Dave W.

Pipes and tubular conduits

End protectors

Threaded

138128, 29432, 29507, 29513, 29890144, 1562737, 285238, 285257, 285915, F16L 5700

Patent

active

058992359

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

This invention relates to ferrules or cuffs and particularly to ferrules or cuffs for terminating sleeves, hoses or like tubular bodies.


BACKGROUND AND SUMMARY OF THE INVENTION

The invention is particular, but not exclusively, concerned with terminating such tubular bodies formed from filamentary or yarn materials that are braided, knitted or woven to form the tubular body. For convenience such a tubular body is referred to herein as a textile tubular body irrespective of the materials and/or construction.
It is a feature of such tubular bodies that the components thereof are movable relative to each other when the body is subjected to various forces and often the materials, such as filaments of glass fibres or plastics material which are smooth and/or exhibit shape memory, result both in a tendency for such bodies to fray at any cut ends and difficulty in capping them by traditional ferrule designs.
Such a traditional ferrule design comprises a metal cap having a tubular wall and an annular end face which is swaged against the tubular wall with the tubular body therebetween to crimp the body. A textile tubular body, particularly a thin walled one, is difficult to retain within such a simple ferrule.
It is known to terminate a tubular body, in joining fluid carrying hoses end-to-end or securing a component thereto, by having inner and outer parts which include radial projections that co-operate to crimp the tubular body. Such multi-part arrangements are usually employed with tubular bodies having a significant wall thickness which is amenable to such crimping but does not lend themselves to simple one-piece terminating ferrules.
Such an arrangement is disclosed in U.S. Pat. No. 5,015,015 which describes joining a pair of overlapping coaxial pipe segments by inserting between their respective inner and outer overlapping tubular surfaces a plurality of circumferentially short clips having radially oppositely inclined barbs which bite into and penetrate both pipe segments. The oppositely inclined barbs are also directed in opposite axial directions so that each is also inclined towards the end of the pipe wall it penetrates to preclude removal.
U.S. Pat. No. 3,911,960 describes an end piece for a tubular element such as a solid pipe, intended to be fitted thereto temporarily to avoid damage to the element surfaces at or near the ends due to handling of the element, including lifting by crane and hook. A tubular body or skirt is moulded to effect a tight encompassing fit on the end region of the tubular element and has an end face, arranged to overly the end of the element, which is divided into radially directed fingers to localise stress concentrations due to lifting by inserting a hook into the tubular element. The fingers are arranged, if necessary, to individually deflect and lie parallel to the inside wall of the tubular element under the action of a local lifting load to prevent damage by such hook. The end piece is not intended as a permanent termination and designed to be removed after use without damage to the tubular element, that is, without intruding into the surface of the tubular element in any way.
In this specification the term tubular body is intended to encompass both a body that is circumferentially continuous at manufacture and one that is circumferentially discontinuous, at least until the time of use and possibly in use, provided such body does in use assume a generally tubular shape for the purpose of defining an enclosure, albeit apertured. To this end it is known for a tubular member to be slit longitudinally such that is has longitudinally extending edges which are arranged to extend parallel to each other, either overlapping or spaced apart, to permit objects or materials to pass through the wall or to envelope such objects or materials; such longitudinally slit tubular members may be opened out and flattened for easy storage and assume a naturally tubular form or may have edge coupling means such that naturally flat material is curled into and maintained in, tub

REFERENCES:
patent: 2099984 (1937-11-01), Lundquist
patent: 3030130 (1962-04-01), Appleton
patent: 3407448 (1968-10-01), Tetzlaff et al.
patent: 3911960 (1975-10-01), Flimon
patent: 4486034 (1984-12-01), Sauer
patent: 5015015 (1991-05-01), Fetters

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