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US 2017/0290723 A1Published application
Seating system having pressure compensating fluid with thermal conduction properties
AssigneeSunrise Medical (US) LLC
InventorsJames Christofferson, Gary Hite
Life of this patent
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Abstract
A seating system, particularly suited for personal mobility vehicles, such as wheelchairs, includes a seat cushion having pressure relieving properties and enhanced thermal conduction properties. The seat cushion includes a thixotropic fluid contained within a flexible envelope. The thixotropic fluid includes nanoparticles that enhance the thermal conduction properties of the seat cushion to increase heat transfer from a seated user to provide a reduced temperature sensory effect.
Claims19
A seat cushion comprising:
- a flexible polymer envelope;
- and
- a thixotropic fluid contained within the flexible polymer envelope, the thixotropic fluid including a base fluid comprising an oil and a block polymer, the block polymer having a first portion that has an affinity to the oil and a second portion, the first and second portions interacting to provide a fluid viscosity that deforms under a generally constantly applied pressure and retains the deformed shape when the pressure is removed, the thixotropic fluid having concentration of nanoparticles configured to increase heat transfer from a seated user to provide a reduced temperature sensory effect.
A seat cushion comprising:
- a flexible polyurethane envelope;
- and
- a thixotropic fluid contained within the envelope, the thixotropic fluid including a base fluid comprising an oil and one of a di-block and a tri-block polymer, the polymer having a first portion that has an affinity to the oil and a second portion, the first and second portions interacting to provide a fluid viscosity that deforms under a generally constantly applied pressure and retains the deformed shape when the pressure is removed, the thixotropic fluid having concentration of nanoparticles configured to increase heat transfer from a seated user to provide a reduced temperature sensory effect.
Dependencies are inferred from the claim text.