PANEL CONSTRUCTIONS

• US 3,732,138 A
• Filed: 03/31/1971
• Issued: 05/08/1973
• Est. Priority Date: 03/31/1971
• Status: Expired due to Term

• Current Assignee: Ehud Almog
• Original Assignee: Ehud Almog
• Inventors: Almog, Ehud
• Primary Examiner(s): Ansher, Harold
• Application Number:
  US05/129,683
• Time in Patent Office: 769 Days
• Field of Search: 161/68,69,39-45,111,122,137,160,161,186,190 52/309,615,618,620
• US Class Current: 428/114
• CPC Class Codes: B32B 15/046 of foam
• CPC Class Codes: B32B 15/14 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 2262/101 Glass fibres
• CPC Class Codes: B32B 2266/0278 Polyurethane
• CPC Class Codes: B32B 2607/00 Walls, panels
• CPC Class Codes: B32B 3/12 characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: E04C 2/205 of foamed plastics, or of plastics and foamed plastics, optionally reinforced
• CPC Class Codes: E04C 2/36 spaced apart by transversely-placed strip material, e.g. honeycomb panels honeycomb or other core members for layered products B32B
• CPC Class Codes: Y10T 428/233 Foamed or expanded material encased
• CPC Class Codes: Y10T 428/24058 including grain, strips, or filamentary elements in respective layers or components in angular relation
• CPC Class Codes: Y10T 428/24132 including grain, strips, or filamentary elements in different layers or components parallel
• CPC Class Codes: Y10T 428/24182 Inward from edge of web or sheet
• CPC Class Codes: Y10T 428/24744 Longitudinal or transverse tubular cavity or cell
• CPC Class Codes: Y10T 428/2495 Thickness [relative or absolute]
• CPC Class Codes: Y10T 428/24999 Inorganic
• CPC Class Codes: Y10T 428/2902 Channel shape
• CPC Class Codes: Y10T 428/31515 As intermediate layer
• CPC Class Codes: Y10T 428/31518 Next to glass or quartz
• CPC Class Codes: Y10T 428/31522 Next to metal

Abstract

A panel characterized in that at least one of its external faces, i.e., the one under compression stresses when the panel is loaded, is made of a lamination including an outer layer bonded to an inner layer by an intermediate layer of rigid plastic foam. The thickness of the rigid plastic foam layer is many times the thickness of each of the said outer and inner layers, and the thickness of the complete panel is many times the thickness of the lamination. The panel further includes strengthening ribs extending longitudinally between the lamination and the other external face of the panel.

Claims

2. A panel as defined in claim 1, wherein said rigid plastic foam is rigid polyurethane foam.

3. A panel as defined in claim 1, wherein the space between said longitudinally-extending strengthening ribs is substantially void.

4. A panel as defined in claim 1, wherein the space between said longitudinally-extending strengthening ribs is occupied by insulating material.

5. A panel as defined in claim 1, wherein the space between said longitudinally-extending strengthening ribs is partially void and partially occupied by blocks of insulating material.

6. A panel as defined in claim 1, wherein said strengthening ribs are joined to said other facing layer by an epoxy adhesive.

7. A panel as defined in claim 1, wherein said strengthening ribs are joined to said other facing layer by rigid plastic foam.

8. A panel as defined in claim 1, wherein said channel members are U-shaped in section and include a pair of legs and an interconnecting web substantially at right angles to said legs.

9. A panel as defined in claim 8, wherein the junctures of said interconnecting webs and legs of the channel members are beveled whereby the rigid plastic foam layer bonded thereto is formed with longitudinally extending plastic strengthening ribs.

10. A panel as defined in claim 8, wherein said channel members are disposed with the open side of one channel member facing the open side of the next adjacent one, the rigid plastic foam bonding one leg of each channel member to said one facing layer, the other leg of each channel member being bonded to the other facing layer, the interconnecting webs constituting the longitudinally extending strengthening ribs.

11. A panel as defined in claim 8, wherein said rigid plastic foam bonds the interconnecting webs of the channel members to said one facing layer, the legs of the channel members constituting said strengthening ribs.

12. A panel as defined in claim 11, wherein said lamination further includes strips alternating with said channel members and bonded by said rigid plastic foam to said one facing layer.