Foam insulating a water heater
US5213728A · kind A · utility
13Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1992 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Jan 22, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C33/0038
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method of the present invention is for foam insulating a water heater where the water heater has an outer shell and an inner tank with tank fittings, the outer shell having tank fitting openings and the inner tank and outer shell being separated by an insulation space. The method comprises locating foam flow barriers between the inner tank and the outer shell around the periphery of each of the tank fitting openings and then spraying foam forming material into the insulation space with the foam barriers preventing the foam from escaping outwardly through the tank fitting openings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.