Patent · US Expired

Sealing element

US4330581A · kind A · utility

10Cited by

1References

9Claims

0Family size

Assignee

Braas GmbH · DE

Inventors

Bernhard Borgert · Mannheim, DE
Udo Liche · Mannheim, DE

Key dates

Filing date	Nov 5, 1979
Grant date	May 18, 1982
Priority date	—
Expiry date	Nov 5, 1999

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24628
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A sealing element is provided which is suitable for sealing flat roofs and engineering structures. The sealing element is made of a water-resistant elastomer or plastomer, and comprises a lamelliform structure of substantially circular shape having from four to six waves, inclusively, distributed radially throughout the structure and around the entire circumference of the structure, the amplitudes of which waves increase regularly from the center of the structure towards the circumference. The undulations enable the sealing element to have an effective surface covering more than 360.degree. without straining any region of the element.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.