Screw anchor

- Illinois Tool Works Inc.
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Description

FIG. 1 is a top perspective view of a screw anchor showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
1476837 December 1923 Pleister et al.
3803973 April 1974 Rapata
3869959 March 1975 Moen
Foreign Patent Documents
2436001 October 1975 DEX
819041 June 1937 FRX
140848 September 1930 CHX
Patent History
Patent number: D262864
Type: Grant
Filed: Oct 9, 1979
Date of Patent: Feb 2, 1982
Assignee: Illinois Tool Works Inc. (Chicago, IL)
Inventors: John N. Schavilje (Mt. Prospect, IL), David C. Boyer (Chicago, IL)
Primary Examiner: B. J. Bullock
Attorneys: J. R. Halvorsen, T. W. Buckman
Application Number: 6/70,570
Classifications
Current U.S. Class: D/8385
International Classification: D0808;