Coupling ring for ventilation ducts
Mattsson , et al. January 22, 2
U.S. patent number D453,042 [Application Number D/135,788] was granted by the patent office on 2002-01-22 for coupling ring for ventilation ducts. This patent grant is currently assigned to Lindab AB. Invention is credited to Sten Hogman, Kenneth Lennartsson, Lars-.ANG.ke Mattsson, Carl-Gustaf Sonden.
| United States Patent | D453,042 |
| Mattsson , et al. | January 22, 2002 |
Coupling ring for ventilation ducts
Claims
The ornamental design for a coupling ring for ventilation ducts, as shown.
| Inventors: | Mattsson; Lars-.ANG.ke (B.ang.stad, SE), Lennartsson; Kenneth (Torekov, SE), Hogman; Sten (Grevie, SE), Sonden; Carl-Gustaf (Angelholm, SE) |
|---|---|
| Assignee: | Lindab AB (Bastad,
SE) |
| Appl. No.: | D/135,788 |
| Filed: | January 17, 2001 |
| Current U.S. Class: | D23/393 |
| Current International Class: | 2304 |
| Field of Search: | ;D23/393 ;29/890.15 ;72/82-84,86 ;285/363 |
References Cited [Referenced By]
U.S. Patent Documents
| D231356 | April 1974 | Kurr |
| 5129690 | July 1992 | Meinig et al. |
| 5983496 | November 1999 | Hermanson |
| 2 311 031 | Jun 1998 | GB | |||
Other References
|
AccuFlange: Round & Oval Duct Connection System, Accu Duct Mfg., product brochure, 1998, pp. 1-32. . LindabRekt, Instruction manual, Lindab Nord AB, May 20, 1998, pp. 1-4. . Rektangulara kanalsystem, Lindab Rekt, product brochure 2000, pp. 1-8. . Introduction to the Rectangular Duct Construction Schedules, HVAC Duct Construction Standards Metal and Flexible--2.sup.nd ed., SMAGNA Section 1.8 ff., pp. 1.12-1.43.. |
Primary Examiner: Siegel; Mitchell
Attorney, Agent or Firm: Weingarten, Schurgin, Gagnebin & Lebovici LLP
Description
FIG. 1 is a front perspective view of an oval coupling ring of the new design.
FIG. 2 is a rear perspective view of the coupling ring of the new design.
FIG. 3 is a rear view of the coupling ring.
FIG. 4 is a side view of the coupling ring.
FIG. 5 is a front view of the coupling ring.
FIG. 6 is an end view of the coupling ring; and,
FIG. 7 is a cross-section of the coupling ring at a central straight portion of the same; section line VII--VII in FIG. 5.
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