Concrete metal-backed access floor panel

Patent 4621468 Issued on November 11, 1986. Estimated Expiration Date:

July 11, 2004. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3696578

3780480

3845593

Construction unit
Patent #: 4016697
Issued on: 04/12/1977
Inventor: Ericson

Computer floor structure
Patent #: 4067156
Issued on: 01/10/1978
Inventor: Downing, Jr.

Structural member with truncated conical portion and composite panel including same
Patent #: 4411121
Issued on: 10/25/1983
Inventor: Blacklin , et al.

Floor panel and method of making same Patent #: 4426824
Issued on: 01/24/1984
Inventor: Swensen

Inventor

Likozar, Martin E.

Assignee

Donn Incorporated

Application

No. 06/629980 filed on 07/11/1984

US Classes:

52/126.6, Adjustable pedestal52/263, On column (e.g., elevated floor)52/789.1Dimpled or embossed sheet

Examiners

Primary: Raduazo, Henry E.
Assistant: Pedersen, Dan W.

Attorney, Agent or Firm

Pearne, Gordon, Sessions, McCoy, Granger & Tilberry

International Class

E04F 15/024 (20060101)

Abstract

A composite access floor panel is disclosed which provides a sheet metal pan filled with a lightweight concrete material. The bottom wall of the pan is contoured so that the thickness of the concrete varies from one location to another. The illustrated panel provides a border of uniform maximum thickness and a central portion of reduced intermediate thickness. In addition, the panel produces concrete oval corner portions and circular side portions spaced in from the centers of the panel sides, both of which provide a uniform minimum thickness. The contours of the panel create a panel in which a substantially uniform amount of deflection results when the panel is supported at its corners and a given load is applied anywhere along the load surface thereof spaced from the panel corners. Shear ties are provided along the interface between the pan and the concrete to cause the pan and concrete to coact in supporting loads applied to such load surface.