EP0102422A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Manufacture of reinforced medico-surgical tubes
Assignee: Individual
•
Filing: 1982-08-31
•
Granted: —
•
Expires: 2002-08-31
Abstract
Abstract Reinforced medico-surgical tubes are produced by first extruding a flexible tube, cooling it, then coiling a filament helix about the cooled tube, extruding an outer layer of flexible material over the helix and base tube, cutting the resulting laminated tube into sections and forming filament-free ends on the cut sections.
Inventors
- 👤 David S. Sheridan
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-22 23:31
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1036; A61M16/00; A61M16/04; A61M16/0402; A61M16/0425; A61M16/0434; A61M16/08; A61M16/0816; A61M2207/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
95 words
A method of producing reinforced medico-surgical tubes each having a distal end and proximal end joined by a central body portion which comprises: extruding a continuous flexible base tube, cooling the extruded tube, coiling a filament helix about the cooled continuous tube, extruding an outer layer of flexible material onto the base tube and filament helix forming a continuous flexible final tube comprising filament helix laminated between said base tube and said outer layer, cutting said final tube into sections of predetermined length, and forming filament-free distal ends upon the cut section of final tube.
Claim 2
Independent Claim
95 words
A method of producing reinforced medico-surgical tubes each having a distal end and proximal end joined by a central body portion which comprises: extruding a continuous flexible base tube, cooling the extruded tube, coiling a filament helix about the cooled continuous tube, extruding an outer layer of flexible material onto the base tube and filament helix forming a continuous flexible final tube comprising filament helix laminated between said base tube and said outer layer, cutting said final tube into sections of predetermined length, and forming filament-free distal ends upon the cut section of final tube.
Claim 3
Dependent Claim
27 words
A method according to claim 1, wherein filament-free proximal ends are formed on said cut section of said final tube in addition to said filament-free distal ends.
Claim 4
Dependent Claim
23 words
A method according to claim 1 or claim 2, wherein said outer layer is extruded from similar type material as said base tube.
Claim 5
Independent Claim
44 words
A method according to anyone of claims 1 to 3, wherein said distal ends are formed by positioning a cut section of final tube as an insert in an injection mold and injection molding said distal end on an end of said cut section.
Claim 6
Independent Claim
39 words
A method according to any one of claims 1 to 3, wherein said distal ends are formed by providing a preformed filament-free tip and welding said tip to an end of one of said cut sections of final tube.
Claim 7
Independent Claim
62 words
A method according to any one of claims 1 to 5, wherein portions of said base tube at spaced intervals remain free of filament helix prior to said extrusion of said outer layer, the cutting of said final tubes is performed through said filament-free portions and said filament-free distal ends are formed by shaping of the final tube in the filament-free portion.
Claim 8
Dependent Claim
33 words
A method according to claim 6, wherein said portions of said base tube that remain free of filament helix are formed by intermittently stopping the coiling of filament helix about said continuous tube.
Claim 9
Dependent Claim
40 words
A method according to claim 6, wherein said portions of said base tube that remain free of filament helix are formed by cutting away portions of filament helix from said base tube prior to extrusion of said outer layer thereon.
Claim 10
Independent Claim
46 words
A method according to any one of claims 1 to 8, wherein the end of-the filament helix of a cut section of final tube is bent into a loop before said filament-free distal end is formed and said distal end is formed to envelope said loop.
Claim 11
Independent Claim
22 words
A method according to any one of claims 1 to 9, wherein said filament helix is formed from tempered stainless steel wire.
Claim 12
Independent Claim
25 words
A method according to any one of claims 1 to 10, wherein said base tube and said outer layer are formed of plasticised polyvinyl chloride.
References Cited (Backward Citations)
FR1048288A
Cited
US2810424A
Cited
FR1363321A
Cited
DE2404656A1
Cited
US4210478A
Cited
DE2740063A1
Cited
DE2837813B2
Cited
DE3006058A1
Cited
EP0036674A2
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.