Extraction hood for use in an extraction system to exhaust fumes from a work station

- AB Ph. Nederman & Co.
Description

FIG. 1 is a front, top, and left side perspective view of an extraction hood for use in an extraction system to exhaust fumes from a work station, showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a front, top and left side perspective view of an extraction hood for use in an extraction system to exhaust fumes from a work station, showing my new design with the side flaps and top flap in forwardly extending position;

FIG. 8 is a rear elevation view of FIG. 7;

FIG. 9 is a bottom plan view of FIG. 7;

FIG. 10 is a top plan view of FIG. 7;

FIG. 11 is a front elevation view of FIG. 7; and,

FIG. 12 is a right side elevation view of FIG. 7.

Referenced Cited
U.S. Patent Documents
D231615 May 1974 Nygard
380500 April 1888 Linscott
398968 March 1889 Jones et al.
404194 May 1889 Holm
2905073 September 1959 Aveni
3082680 March 1963 Nevin et al.
3520115 July 1970 Bowen
4584929 April 29, 1986 Jarmyr et al.
Foreign Patent Documents
143538 September 1981 DKX
2334432 July 1977 FRX
8702139 May 1987 SEX
Other references
  • Optic-Aire Systems, Inc. Adv. Brochure, .COPYRGT.1968, back cover, fume hood, upper left side of page. Swedish Brochure "Bahco Toronado Platsutsugbho", 1983. Soviet Publication #SU-916,913 "Soviet Inventions Illustrated", 1983.
Patent History
Patent number: D332305
Type: Grant
Filed: Jul 24, 1990
Date of Patent: Jan 5, 1993
Assignee: AB Ph. Nederman & Co. (Helsingborg)
Inventor: Hakan R. Karlsson (Eslov)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Lisa Lichtenstein
Law Firm: Bacon & Thomas
Application Number: 7/556,811
Classifications
Current U.S. Class: Exhaust Type (D23/371)