Helical formation for a conduit

• US 20050061380A1
• Filed: 11/21/2002
• Published: 03/24/2005
• Est. Priority Date: 11/21/2001
• Status: Active Grant

• Current Assignee: Tayside Flow Technologies, Ltd.
• Original Assignee: Tayside Flow Technologies, Ltd.
• Inventors: Hood, Robert Gordon, Sarran, Christophe Emmanuel, Stonebridge, Peter Arno, Johnstone, Allana, Duff, Craig McLeod, Houston, John Graeme, Dick, John Bruce Cameron
• Granted Patent: US 7,185,677 B2
• Time in Patent Office: Days
• US Class Current: 138/39
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2250/0013 for adjusting fluid pressure
• CPC Class Codes: F15D 1/04 Arrangements of guide vanes in pipe elbows or duct bends; Construction of pipe conduit elements for elbows with respect to flow, e.g. for reducing losses of flow

Abstract

A helical formation (2) for a conduit (1). The helical formation (2) comprises an elongate member defining at least a portion of a helix, the elongate member comprising two inwardly extending portions (6, 7). The inwardly extending portions (6, 7) are spaced from each other and extend along the length of the elongate member in side-by-side relationship.

Claims

1. A helical formation for a conduit, the helical formation comprising an elongate member defining at least a portion of a helix, the elongate member comprising two inwardly extending portions, the inwardly extending portions being spaced from each other, extending along the length of the elongate member in side-by-side relationship.

2. A helical formation according to claim 1, wherein the longitudinally extending member further comprises an intermediate portion that separates the two inwardly extending portions.

3. A helical formation according to claim 1, wherein the inwardly extending portions extend inwardly of the helix defined by the longitudinally extending member by substantially the same distance.

4. A helical formation according to claim 1, wherein the inwardly extending portions extend inwardly of the helix defined by the longitudinally extending member by different distances.

5. A helical formation according claim 1, wherein the helical formation is in the form of an insert adapted to be inserted into the conduit, in use.

6. A helical formation according to claim 1, wherein the helical formation is an integral part of a side wall of the conduit.

7. A helical formation according to claim 6, wherein the helical formation is formed by a deformation of a portion of the side wall of the conduit.

8. A helical formation according to claim 1, wherein the helical formation is for use in blood flow tubing for the human or animal body.

9. A helical formation according to claim 8, wherein the helical formation is for use in a graft.

10. A helical formation according to claim 8, wherein the helical formation is for use in a stent.

11. A helical formation according to claim 1, wherein the inwardly extendible portions are movable to a collapsed position.