# US 5,348,790 A · Extruded panel unit for constructional purposes

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- Number: US 5,348,790 A
- Document ID: US5348790A
- Status: Granted
- Kind: A
- Application number: 08/005,805
- Filed: 1993-01-19
- Granted: 1994-09-20
- Earliest claimed: 1992-01-24
- Assignees: Dan-Pal
- Inventors: Nir Ben-Zvi; Shaul Givoni
- Web page: https://patentgrep.com/patent/US5348790A

## CPC

- E04C 2/543: {Hollow multi-walled panels with integrated webs}
- E04C 2/34: composed of two or more spaced sheet-like parts (E04C2/32 takes precedence; spacers for cavity walls E04B2/44)
- Y10T 428/24008: including fastener for attaching to external surface
- Y10T 428/24149: Honeycomb-like
- Y10T 428/24182: Inward from edge of web or sheet
- Y10T 428/24661: Forming, or cooperating to form cells
- Y10T 428/24744: Longitudinal or transverse tubular cavity or cell
- Y10T 428/24777: Edge feature
- Y10T 428/2495: Thickness [relative or absolute]
- Y10T 428/24967: Absolute thicknesses specified
- E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An extruded, panel unit for constructional purposes, having two sheet-like major surfaces interconnected and spaced apart by a plurality of ribs and intermediate surfaces dividing the space delimited by the major surfaces into a plurality of sub-spaces. In cross-section, the sheet-like major surfaces and the rib and intermediate surfaces form a truss-like structure and there are provided more than three sub-spaces across a plane extending substantially normal to and connecting the major surfaces.

## Claims

### Claim 1

An extruded, panel unit for constructional purposes, comprising
at least two sheets forming major surfaces interconnected and spaced apart by a plurality of ribs and
intermediate surfaces which divide a space defined between said major surfaces into a plurality of sub-spaces, wherein, in cross-section, said major surfaces and said ribs and intermediate surfaces form a truss structure and wherein there are provided more than three sub-spaces across a plane extending substantially normal to and connecting said major surfaces.

### Claim 2 (depends on 1)

The panel as claimed in claim 1, wherein walls of said ribs and intermediate surfaces are of a thickness which is at most one third of the thickness of either of the major surfaces.

### Claim 3 (depends on 1)

The panel as claimed in claim 1, wherein walls of said ribs and intermediate surfaces are of a thickness less than 0.2 mm.

### Claim 4 (depends on 1)

The panel as claimed in claim 1, wherein said ribs and surfaces form, in cross-section, a configuration of squares.

### Claim 5 (depends on 1)

The panel as claimed in claim 1, wherein a distance d between ribs and a distance l between surfaces forming a sub-space is such that d/l.ltoreq.N/2, where N is a number of sub-spaces between said major surfaces and wherein N.gtoreq.4.

### Claim 6 (depends on 1)

The panel as claimed in claim 1, further comprising at least one end wall joining the edges of said major surfaces.

### Claim 7 (depends on 1)

The panel as claimed in claim 1, further comprising at least one joining flange extending in a direction of extrusion, said joining flange projecting at an angle from, at or adjacent to, an edge of the panel.

### Claim 8 (depends on 1)

The panel as claimed in claim 1, further comprising reinforcing ribs having a thickness greater than the thickness of said ribs.

### Claim 9 (depends on 1)

The panel as claimed in claim 1, wherein each subspace is enclosed by ribs and intermediate surfaces.

### Claim 10 (depends on 1)

The panel as claimed in claim 1, wherein said ribs and said intermediate surfaces are oblique to said major surfaces.

### Claim 11 (depends on 1)

The panel as claimed in claim 1, wherein said ribs are perpendicular to said major surfaces and said intermediate surfaces are parallel to said major surfaces.

### Claim 12 (depends on 1)

The panel as claimed in claim 1, wherein said ribs and said intermediate surfaces are oblique to said major surfaces.

### Claim 13 (depends on 1)

The panel as claimed in claim 1, wherein said ribs are perpendicular to said major surfaces and said intermediate surfaces are parallel to said major surfaces.

### Claim 14

An extruded panel unit, comprising:
at least two sheets forming major surfaces;
a plurality of ribs interconnecting the major surfaces, the ribs arranging the major surfaces in a parallel, spaced apart relationship so as to define a space between said major surfaces; and
intermediate surfaces which divide the space defined between said major surfaces into a plurality of subspaces, wherein, in a cross-section perpendicular to said major surfaces, said major surfaces and said ribs and intermediate surfaces form a truss structure as a configuration of squares, and wherein more than three sub-spaces are provided across a plane extending substantially normal to and connecting said major surfaces.