Spring used in venetian blinds

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Description

FIG. 1 is a side elevational view of a spring used in venetian blinds showing my new design, the opposite side being a mirror image thereof;

FIG. 2 is a front elevational view of FIG. 1, the rear being a mirror image thereof; and,

FIG. 3 is a perspective view of FIG. 1.

The spring has no substantial thickness.

Referenced Cited
U.S. Patent Documents
1025064 April 1912 Huffman
1629868 May 1927 Hesslink
2678688 May 1954 Dragon
2848574 August 1958 Hutt et al.
2855990 October 1958 Maty
2980180 April 1961 Stephens et al.
3192551 July 1965 Appel
3238780 March 1966 Doyle
4687041 August 18, 1987 Anderson
4887657 December 19, 1989 Spohr
5046683 September 10, 1991 Carroll
Other references
  • Grammes Metal Products Catalog .COPYRGT.1941, p. 32, Item 33687. Raymond Manufacturing Catalog of Springs, Assembled Springs Section, Item Indicated.
Patent History
Patent number: D404953
Type: Grant
Filed: Jan 31, 1996
Date of Patent: Feb 2, 1999
Inventor: Rolf Fransson (243 22 Hoor)
Primary Examiner: Jeffrey Asch
Law Firm: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
Application Number: 0/49,740
Classifications
Current U.S. Class: D/6530; D8/499
International Classification: 0610;