Expandable hose device
AssigneeCaoutchouc Manufacture et Plastiques
InventorsJacques J. Champleboux, Bernard Ragout, Maurice Rouby
Life of this patent
Estimating the term…
Abstract
Device with flexible hose, particularly for an expandable packer, wherein hose is reinforced by armature layers made of flexible cables disposed helically and is attached at least at one end by compression of said layers against rigid pieces, characterized by the supporting elements and gripping elements, which are coaxial, having nonadhesive conical compression surfaces which diverge toward the end and by at least one wedge provided with slits being driven between reinforcing layers to ensure compression.
Claims15
A flexible, elastic hose device, comprising at least one rigid end piece and a hose that is reinforced by at least two pairs of adjacent reinforcing layers made of flexible cables disposed helically and that is fastened at at least one end by compression of said at least two reinforcing layers against said rigid end piece, said rigid end piece comprising an inner supporting element and an outer gripping element, said inner supporting element and said outer gripping element being coaxial and having conical compression surfaces which diverge toward said at least one end;
- and at least one wedge arranged between said adjacent reinforcing layers of each pair at said at least one end to compress said at least adjacent two reinforcing layers between said at least one wedge and, respectively, said inner supporting element and said outer gripping element, wherein said conical compression surfaces are in contact with and are non-adhesive to surfaces of said at least two adjacent reinforcing layers;
- and wherein said at least one wedge is provided with at least two slits, said two slits being offset with respect to each other in opposite directions and extending through said wedge so as to define a strip therebetween, thereby producing a self-locking effect at said at least one end.
A flexible, elastic hose device, comprising at least one rigid end piece and a hose that is reinforced by at least two pairs of adjacent reinforcing layers made of flexible cables disposed helically and that is fastened at at least one end by compression of said at least two reinforcing layers against said rigid end piece, said rigid end piece comprising an inner supporting element and an outer gripping element, said inner supporting element and said outer gripping element being coaxial and having conical compression surfaces which diverge toward said at least one end;
- and at least one wedge arranged between said adjacent reinforcing layers of each pair at said at least one end to compress said at least two adjacent reinforcing layers between said at least one wedge and, respectively, said inner supporting element and said outer gripping element, wherein said conical compression surfaces are in contact with and are non-adhesive to surfaces of said at least two adjacent reinforcing layers;
- and wherein each of said at least one wedge is provided with pairs of axially disposed slits separated by a strip, thereby producing a self-locking effect at said at least one end;
- each of said at least one wedge having conical compression surfaces, a base and a vertex, one slit of each of said pairs of slits extending from said vertex of said wedge toward said base, another slit of each said pairs of slits extending from said base of said wedge toward said vertex, the length of each of said one slit and said another slit being less than the distance between said vertex and said base and the sum of said lengths of said one slit and said another slit being greater than said distance between said vertex and said base.
Dependencies are inferred from the claim text.