Method of lining inner wall surfaces of hollow articles
US4377894A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1981 |
| Grant date | Mar 29, 1983 |
| Priority date | — |
| Expiry date | Mar 17, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4994
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The inner surface of a hollow article of special shape such as a pipe elbow or bellows is lined with a tightly fitted protective lining material by the steps of emplacing the lining material within the hollow article to confront the inner surface thereof, causing the temperature of the hollow article to be higher than that of the lining material, applying an expanding force to the lining material thereby to cause it to undergo plastic expansion together with the hollow article, removing the expanding force, and causing the temperature of the hollow structure to become lower than that of the lining material thereby to produce a tight fit therebetween due to interference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.