Spacer in concentric tube systems

US4259990A · kind A · utility

Assignee

• Kabel- und Metallwerke Gutehoffnungshutte AG · DE

Inventor

• Peter Rohner · Lüneburg, DE

Key dates

• Filing date: Jun 20, 1979
• Grant date: Apr 7, 1981
• Expiry date: Jun 20, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S505/883
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A spacer for concentric tubes is constructed as a helical braid; the braid elements have smooth or contoured surfaces, are of a solid configuration, or are made from stranded filaments. The elements or filaments are made from synthetic (polymer) material or metal, or one uses both kinds of materials in the same braid or element.