Cushion having multilayer closed cell structure
AssigneeHPI Health Protection, Inc.
InventorRodger E. Kolsky
Life of this patent
Estimating the term…
Abstract
A cushion or pad comprises a first layer of a first synthetic cellular material having a first average cell volume and a second layer of a second synthetic cellular material having a second average cell volume at least ten times greater than the first average cell volume. The first layer is attached to the second layer so that the first layer and the second layer at least partially overlap one another to form a multilayer structure. The layer with the larger average cell volume is a polymeric sheet with at least a substantially planar array of fluid-filled pockets or chambers. The layer with the smaller average cell volume is a foam material with either open cells or closed cells. Further layers of fluid-filled chambers or foam material may be attached to the first two layers.
Claims24
A cushion comprising:
- a first layer of a synthetic cellular material having an average cell volume;
- a second layer of a flexible polymeric material provided with an array of closed fluid-filled chambers having an average volume at least ten times greater than said average cell volume;
- and
- means for attaching said first layer to said second layer so that said first layer and said second layer at least partially overlap one another to form a multilayer structure.
A cushion comprising:
- a first layer of a first synthetic cellular material having a first average cell volume;
- a second layer of a second synthetic cellular material having a second average cell volume at least ten times greater than said first average cell volume;
- means for attaching said first layer to said second layer so that said first layer and said second layer at least partially overlap one another to form a multilayer structure;
- and
- a third layer of essentially hard material and means for securing said first layer and said second layer to said third layer.
A cushion comprising:
- a first layer of a polymeric material provided with an array of closed fluid-filled chambers;
- a second layer of a cellular foam material having an average cell volume, said closed fluid-filled chambers having an average volume at least ten times greater than said average cellular volume;
- and
- means for attaching said first layer to said second layer so that said first layer and said second layer at least partially overlap one another to form a multilayer structure.
Dependencies are inferred from the claim text.