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United States Patent | 5,076,019 |
Wessiepe ,   et al. | * December 31, 1991 |
The door has a separate seal element and a hollow profile frame. The hollow profile frame has a number of tappets extending therefrom to press the seal element against a door frame. These tappets are applied individually to the seal element by pressure from a pneumatic hose within the hollow profile frame which applies pressure to the tappets.
Inventors: | Wessiepe; Klaus (Essen, DE); Stewen; Wilhelm (Oberhausen, DE) |
Assignee: | Ruhrkohle AG (Essen, DE) |
[*] Notice: | The portion of the term of this patent subsequent to January 22, 2008 has been disclaimed. |
Appl. No.: | 609721 |
Filed: | November 6, 1990 |
Dec 23, 1987[DE] | 3743692 |
Intern'l Class: | E06B 007/16 |
Field of Search: | 49/477,480,481,485,482 202/248,292,269 292/33,302 |
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