Claims
- 1. An inflatable protective cushion comprising an uncoated sheet of material made from yarn of less than about 300 denier, said sheet being defined by four or fewer fold lines and a plurality of flap portions, each flap portion having a base edge corresponding to a fold line and at least two side edges each extending outwardly from the base edge, the flap portions being folded at the fold lines and being joined at corresponding side edges to define an inflatable chamber.
- 2. A cushion as recited in claim 1, wherein said sheet is made of a material having a grab tensile strength of less than 255 lbs. and a Mullen burst strength of less than 325 psi.
- 3. A cushion as recited in claim 1, wherein said sheet is made of a material having an air permeability of less than 1.10 cfm/sq. ft. at a pressure drop of 0.5 in. of water across the material.
- 4. An inflatable protective cushion comprising a sheet of material defined by four or fewer fold lines and a plurality of flap portions, each flap portion having a base edge corresponding to a fold line and at least two side edges each extending outwardly from the base edge and ultimately converging to meet each other, the flap portions being folded at the fold lines with each of the flap portions substantially converged to form an apex above the sheet and being joined at corresponding side edges by stitching and without bonding adhesive to define an inflatable chamber.
- 5. An inflatable protective cushion comprising a sheet of material defined by four or fewer fold lines and a plurality of flap portions, each flap portion having a base edge corresponding to a fold line and at least two side edges each extending outwardly from the base edge and ultimately converging to meet each other, the flap portions being folded at the fold lines with each of the flap portions substantially converged to form an apex above the sheet and being joined at corresponding side edges by stitching and without bonding adhesive to define an inflatable chamber, wherein said sheet is a material made from yarn of less than 300 denier.
- 6. An inflatable protective cushion comprising a sheet of material defined by four or fewer fold lines and a plurality of flap portions, each flap portion having a base edge corresponding to a fold line and at least two side edges each extending outwardly from the base edge and ultimately converging to meet each other, the flap portions being folded at the fold lines with each of the flap portions substantially converged to form an apex above the sheet and being joined at corresponding side edges to define an inflatable chamber, wherein said edges are joined without reinforcing overlap of said edges.
Parent Case Info
This application is a continuation of application Ser. No. 08/355,241, filed Dec. 9, 1994, U.S. Pat. No. 5,533,755, which is a continuation of application Ser. No. 08/082,471 filed Jun. 28, 1993 which issued as U.S. Pat. No. 5,482,317 on Jan. 9, 1996.
Government Interests
This invention was made with support of the United States Government under Contract No. DE-AC0476DP00789, awarded by the Department of Energy. The United States Government has certain rights in the invention.
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Continuations (2)
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Number |
Date |
Country |
Parent |
355241 |
Dec 1994 |
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Parent |
82471 |
Jun 1993 |
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