Portable bed stiffener

Claim 2

A bed stiffener comprising: three boards, including a middle board and first and second end boards, said boards each having front and rear faces and opposite sides, said three boards forming first and second hinge joints each pivotally connecting one of said sides of said middle board to one side of one of said end boards; said first hinge joint pivotally supporting said first end board in pivoting between a deployed position wherein said front faces of said middle and first boards face in the same direction and a stowed position wherein said rear face of said first end board lies substantially facewise against said rear face of said middle board, and said second hinge joint pivotally supporting said second end board in pivoting between a deployed position wherein said front faces of said middle and second boards face in the same direction and a stowed position wherein said rear face of said second board lies substantially facewise against said front face of said stowed first board.

Claim 3

The bed stiffener described in claim 1 wherein: said second hinge joint has a pivot axis lying below said rear face of said middle board, when said front upper face of said middle board lies horizontal and faces upwardly, by a distance about equal to half the thickness of said middle board.

Claim 4

The bed stiffener described in claim 1 wherein: said middle board and second board have about the same widths as measured between their opposite sides at their front faces, while said first end board has a smaller width than said middle and second boards; said second hinge joint has a pivot axis that, in said stowed position of said end boards lies about halfway between the rear face of the middle board, and the front face of the second end board, and lies adjacent to a side of the stowed first end board.

Claim 5

A bed stiffener comprising: a middle board having opposite sides and front and rear faces; first and second end boards, each having opposite sides and front and rear faces, each end board movable between a deployed position wherein its front face lies substantially coplanar with the front face of said middle board and each end board and said middle board have adjacent sides, and a stowed position wherein each end board lies behind the rear face of the middle board; said boards forming a first hinge joint pivotally connecting adjacent sides of said first end board and said middle board, said first hinge joint having a pivot axis lying at about the rear face of the middle board and the rear face of the first end board; a second hinge joint pivotally connecting adjacent sides of said second end board and said middle board, said second hinge joint having a pivot axis lying about halfway between the rear face of said middle board and said second end board in the stowed position of said end board.

Claim 6

A bed stiffener comprising: a middle board having opposite sides and front and rear faces; first and second end boards, each having opposite sides and front and rear faces, each end board movable between a deployed position wherein its front face lies substantially coplanar with the front face of said middle board and each end board and said middle board have adjacent sides, and a stowed position wherein each end board lies behind the rear face of the middle board; said boards forming a first hinge joint pivotally connecting adjacent sides of said first end board and said middle board, said first hinge joint having a pivot axis lying at about the rear face of the middle board and the rear face of the first end board; a second hinge joint pivotally connecting adjacent sides of said second end board and said middle board, said second hinge joint having a pivot axis lying about halfway between the rear face of said middle board and said second end board in the stowed position of said end board.

Claim 7

The bed stiffener described in claim 4 wherein: said first end board is shorter than said middle board, and said second hinge joint lies adjacent to a side of said first end board in the stowed position of the first board.

Claim 8

The bed stiffener described in claim 4 wherein: said boards each have a body portion and a hinge section molded integrally therewith, the hinge sections of boards with adjacent sides in the deployed position interfitting and forming aligned holes, and including a hinge pin extending through the aligned holes.