Combination lift insert and weld plate for use in hollow core concrete planks

- Fabcon, Inc.
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Description

FIG. 1 is a perspective view of a combination left insert and weld plate for use in hollow core concrete planks embodying my new design;

FIG. 2 is an end elevational view taken from the right of FIG. 1;

FIG. 3 is an end elevational view taken from the right of FIG. 1;

FIG. 4 is a side elevational view taken from the left of FIG. 1;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
2886370 May 1959 Lichert
3187694 June 1965 Crookston et al.
3259086 July 1966 Stein
4262951 April 21, 1981 Hoyer
4304431 December 8, 1981 Walston
Other references
  • Twin City Testing and Engineering Laboratory, Load Test of Prestressed Concrete Plank End Lifter System, Dec. 14, 1978.
Patent History
Patent number: D272517
Type: Grant
Filed: Jun 15, 1981
Date of Patent: Feb 7, 1984
Assignee: Fabcon, Inc. (Savage, MN)
Inventor: Richard R. Koehn (Prior Lake, MN)
Primary Examiner: B. J. Bullock
Application Number: 6/273,476
Classifications
Current U.S. Class: D/8349; D/8313; D/8384; D25/98
International Classification: D0808; D0806; D2599;