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US 4,724,560 AGranted
Pillow utilizing air and water
OwnerLarry L. Christieinventor
Life of this patent
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Abstract
A pillow adapted to provide yieldable support of controllable softness and thickness is fabricated of thermoplastic sheet material in a manner whereby a central air compartment is surrounded by a continuous liquid compartment, each compartment being provided with valve means. The pillow may be fabricated by the interbonding of four rectangular pieces of thermoplastic sheet material. When empty of air and liquid, the pillow occupies little storage space.
Claims2
A pillow capable of providing yieldable support of controllable softness and thickness, and capable of being placed in a storage mode which occupies little space, comprising:
- (a) sheet means defining an enclosed, generally flat, continuous air compartment having an upper boundary surface and a lower boundary surface,
- (b) sheet means defining an enclosed upper and an enclosed lower liquid compartment which respectively bear against the upper and lower boundary surfaces of said air compartment,
- (c) channels communicating between said upper and lower liquid compartments, said channels passing through said air compartment,
- (d) first valve means extending into said air compartment, and
- (e) second valve means extending into said liquid compartment,
- (f) said pillow being fabricated from four equally sized rectangular sheets of resilient thermoplastic material interbonded to form a rectangular pillow having a long center axis,
- (g) said channels being symmetrically disposed with respect to said axis.
4 more elements
Dependencies are inferred from the claim text.