Flexible conduit, such as pipe for medical or surgical use
US6394145B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 16, 2000 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | May 16, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L11/24
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed is a process for obtaining a flexible conduit comprising a tube and a helical structure. The process comprises extruding a crosslinkable plastic material in a malleable or formable state, so as to form a profiled strip having, as one piece, a web with two mutually complementary marginal edges, and at least one rib projecting on one side from the web; winding the profiled strip about an axis in a helix with touching turns so that the complementary marginal edges of the profiled strip, belonging respectively to two different turns, form between them, directly, a sealed joint; varying and controlling a winding pitch of the profiled strip, in order to modulate and control a quantity of available and formable plastic material of the tube along the length of the conduit; and crosslinking the wound profiled strip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.