Inflatable door seal
US7578097B2 · kind B2 · utility
12Cited by
36References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2003 |
| Grant date | Aug 25, 2009 |
| Priority date | — |
| Expiry date | Apr 23, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D21/04
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A door for a cold storage locker or other applications includes an inflatable or fluid-filled seal system. The seal system comprises a network of pliable tubular seals that expand as air or another fluid is forced air through the seals. Expansion of the seals provides a more positive seal. To inhibit frost from accumulating near the seals, the seals are kept relatively warm by continuously circulating fluid through the seals regardless of whether the door is open or closed. In some cases, the fluid within the seals is heated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.