Encasing tubing having continuous bonding enhancing properties

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5038834
SERIAL NO

07320318

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The wall (5) of the encasing tube (1) includes spiralling protrusions (3, 4). First protrusions (3) and second protrusions (4) run either in different directions or in the same direction but at different pitches. The encasing tube is used for enclosing tensioning cable (2) in concrete structures. By means of the particular arrangement of the protrusions, the flow properties of the grout are improved, air bubbles are virtually eliminated during injection, and the bonding properties of tensioning cables are improved by means of large bonding zones while respecting the required high fatigue strength.

First Claim

See full text

Other Claims data not available

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
VSL INTERNATIONAL AG3014 BERN

International Classification(s)

loading....
  • 1989 Application Filing Year
  • F16L Class
  • 661 Applications Filed
  • 7 Patents Issued To-Date
  • 1.06 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances198919901991199219931994199519961997199819992000200120020255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Siegfried, Erwin Liebefeld, CH 5 65

Cited Art Landscape

Load Citation

Patent Citation Ranking

  • 21 Citation Count
  • F16L Class
  • 0 % this patent is cited more than
  • 34 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges

Forward Cite Landscape

Load Citation