Coupling element for connecting the flanged ends of ducts
Description
FIG. 1 is a perspective view taken from the top and one side of a coupling element for connecting the flanged ends of ducts in the closed state;
FIG. 2 is a perspective view from the opposite side of the coupling element in the closed state; and,
FIG. 3 is a perspective view of the coupling element in the open state.
The bottom of the design is a mirror image of the top.
Referenced Cited
Patent History
Patent number: D335173
Type: Grant
Filed: Jun 22, 1990
Date of Patent: Apr 27, 1993
Inventors: Stefan Leufstedt (S-271 44 Ystad), Carl-Eric Jaderberg (S-393 23 Kalmar)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Lisa Lichtenstein
Law Firm: Merchant & Gould Smith, Edell, Welter & Schmidt
Application Number: 7/542,165
Type: Grant
Filed: Jun 22, 1990
Date of Patent: Apr 27, 1993
Inventors: Stefan Leufstedt (S-271 44 Ystad), Carl-Eric Jaderberg (S-393 23 Kalmar)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Lisa Lichtenstein
Law Firm: Merchant & Gould Smith, Edell, Welter & Schmidt
Application Number: 7/542,165
Classifications
Current U.S. Class:
Vent, Ductwork, Or Element Thereof (D23/393)