Elastic frame for fireproof feed-through of electric cables in walls of concrete or rock or the like

- AB Lyckeaborgs Bruk
Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view of an elastic frame for fireproof feed-through of electric cables in walls of concrete or rock or the like, showing my new design; and

FIG. 2 is a perspective view thereof from the side opposite that visible in FIG. 1.

Referenced Cited
U.S. Patent Documents
2623303 December 1952 Mindel
3800486 April 1974 Harvey
4071265 January 31, 1978 Wallace
Foreign Patent Documents
1246436 September 1971 GBX
Patent History
Patent number: D253554
Type: Grant
Filed: Dec 21, 1976
Date of Patent: Nov 27, 1979
Assignee: AB Lyckeaborgs Bruk (Karlskrona)
Inventor: Erik M. Blomqvist (Karlskrona)
Primary Examiner: A. Hugo Word
Attorney: Irvin S. Thompson
Application Number: 5/757,224
Classifications
Current U.S. Class: D25/90; D25/91
International Classification: D2501;