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Pneumatic, ball-shaped chair

  • US 5,690,389 A
  • Filed: 09/09/1996
  • Issued: 11/25/1997
  • Est. Priority Date: 09/09/1996
  • Status: Expired due to Term
First Claim
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1. A chair for allowing the spine of an individual to vertically adjust and activate the individual'"'"'s trunk muscles, as the individual shifts position upon a seat support of said chair, comprising:

  • an inflatable shell forming a substantially spherical seat base upon which an individual can be seated, said inflatable shell being flexible for activating the individual'"'"'s trunk muscles and allowing the seated individual'"'"'s spine to adjust as said seated individual shifts position upon said spherical seat base;

    support means for carrying said inflatable shell; and

    adjustment means disposed between said inflatable shell and said support means for adjusting a vertical position of said inflatable shell.

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