The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 1977
Filed:
Aug. 21, 1975
Applicant:
Inventor:
Nick J Koskolos, Affton, MO (US);
Assignee:
Intertherm, Inc., St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
285189 ; 285158 ; 285424 ;
Abstract
For use in connecting flexible air-carrying ducts into rectangular sub-floor ducts, a knock-down collar, easily installed in the field, possesses sufficient rigidity to withstand the compression of a draw band by which a flexible duct is secured. Field assembly is by means of a drive cleat over 180.degree. flanges of the collar workpiece; tabs outstanding from the bends resist the hoop compression. A ring of inward-bent trapezoidal segments forms a flange presentable upwardly against the edge surface around an opening in a sub-floor duct with their tips bent upward and back to secure to such opening.