Resilient snap-on electric heating jacket for tubular objects
US4329569A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1980 |
| Grant date | May 11, 1982 |
| Priority date | — |
| Expiry date | May 1, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2203/004
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A resilient snap-on electric heating jacket for heating tubular objects includes a thin sheet of flexible plastic material constituting a radially internal curved surface adapted to engage the surface of the object. A pattern of spaced electrically conductive loops are formed on the radially external surface of the sheet to define an electric heating element. A thick resilient support member of polymeric material coextensive with and overlying the external surface of the plastic sheet and the foil loops is directly secured to the external surface portions of the foil loops and the plastic sheet by an autogenous bond to form a unitary structure generally C-shaped in cross section and capable of being snapped onto a tubular object the outer diameter of which corresponds approximately to the inner diameter of the profile of the unitary structure. The profile of the support member encloses an angle between 180.degree. and 270.degree. and preferably between 200.degree. and 250.degree..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.