Boxcell core and panel
OwnerScott Douglas Coganinventor
Life of this patent
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Abstract
A honeycomb type core configuration for composite structural panels generated by folding sheet material. The box shaped core, when attached to a surface sheet imparts rigidity to the sheet for use as a high strength to weight ratio structural sheet panel. The cell walls of the folded core are integral with the cell bottom which provides a large surface area for ease of attachment to the surface sheet.
Claims4
A structural monolithic cellular core element consisting of a multiplicity of rectangular cell openings within the body of the material, two sides of all said rectangular cell openings being a plurality of parallel pleats projecting substantially normal to the plane of one side of said material, said pleats being in rows whereas the rows extend in a direction normal to the plane of said pleats and the pleats are uniformly spaced, the depth of said pleats measured in a direction normal to the plane of said material being approximately one-half the distance between adjacent pleats in a single said row of pleats, adjacent said rows of pleats have an off-set of said pleats a distance approximately equal to the said pleat depth, the length of said pleats measured in the direction of the pleat fold being essentially the same for all pleats in a single said row of pleats and the pleats terminate in length at each end into triangular gathering folds thereof directed in planes substantially normal to the planes of said pleats and closing the remaining two sides of said rectangular cell openings, said triangular gathering folds being isosceles in transverse cross section and having an altitude essentially equal to the said pleat depth with the apex angle of said triangular gathering folds bisected by said pleats and said triangular gathering folds have a base length equal to the distance between two adjacent pleats in said row of pleats, the said triangular gathering fold base length being in the plane of said material, the side of said material opposite the projecting said pleats and said triangular gathering folds being a plane and closing one end of said rectangular cell openings.
A structural reinforced panel assembly comprising:
- at least one monolithic cellular core element consisting of a multiplicity of rectangular cell openings within the body of the material, two sides of all said rectangular cell openings being a plurality of parallel pleats projecting substantially normal to the plane of one side of said material, said pleats being in rows whereas the rows extend in a direction normal to the plane of said pleats and the pleats are uniformly spaced, the depth of said pleats measured in a direction normal to the plane of said material being approximately one-half the distance between adjacent pleats in a single said row of pleats, adjacent said rows of pleats have an off-set of said pleats a distance approximately equal to the said pleat depth, the length of said pleats measured in the direction of the pleat fold being essentially the same for all pleats in a single said row of pleats and the pleats terminate in length at each end into triangular gathering folds thereof directed in planes substantially normal to the planes of said pleats and closing the remaining two sides of said rectangular cell openings, said triangular gathering folds being isosceles in transverse cross section and having an altitude essentially equal to the said pleat depth with the apex angle of said triangular gathering folds bisected by said pleats and said triangular gathering folds have a base length equal to the distance between two adjacent pleats in said row of pleats, the said triangular gathering fold base length being in the plane of said material, the side of said material opposite the projecting said pleats and said triangular gathering folds being a plane and closing one end of said rectangular cell opening;
- a sheet material contacting and bonded to the said plane side of said monolithic cellular core element.
Dependencies are inferred from the claim text.