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US 4,409,271 AGranted
Lightweight construction element
AssigneePehr Holding Gesellschaft
InventorHarald Pehr
Life of this patent
Estimating the term…
Abstract
A lightweight construction element is provided with a fabric backing from untrimmed velvet fabric, coated to render it airtight and pressure resistant, with the internal space thereof allowing pressurization. With the pressurizing medium filled in, the yarn linking the two outer fabric webs will maintain a predetermined distance between the fabric webs and ensure high stability of the element.
Claims8
A lightweight construction element comprising:
- an untrimmed velvet fabric comprising;
- a first fabric web;
- and
- a second fabric web separated from said first fabric web and peripherally secured thereto;
- a plurality of pile yarns linking said first fabric web to said second fabric web at a predetermined distance;
- and
- an airtight pressure resistant coating provided on said first fabric web and on said second fabric web such that an airtight internal chamber is formed having said plurality of pile yarns disposed therein.
4 more elements
Dependencies are inferred from the claim text.