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Patient support structure

  • US 4,745,647 A
  • Filed: 12/30/1985
  • Issued: 05/24/1988
  • Est. Priority Date: 12/30/1985
  • Status: Expired due to Term
First Claim
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1. An improved patient support structure, comprising:

  • (a) a frame;

    (b) a plurality of elongated inflatable sacks atop said frame;

    (c) gas supply means in communication with each of said sacks for supplying gas to same;

    (d) control means associated with said gas supply means and said sacks, for controlling supply of gas to each of said sacks according to a predetermined pressure profile across said plurality of sacks and according to a plurality of predetermined combinations of said sacks, each said combination of sacks defining a separate support zone; and

    (e) gas flow switching means associated with certain of said sacks for switching said certain sacks between adjacent zones for accommodation of patients of differing heights and weights; and

    (f) said gas flow switching means including;

    (i) at least two manifolds, each said manifold having one inlet and at least two outlets,(ii) at least four valve means, one said valve means being in communication with each one of said outlets of said manifolds, each said valve means having an inlet port and an outlet port,(iii) at least four gas pipes, one said gas pipe extending from each outlet port of each of said valve means, and(iv) wherein one of said gas pipes extending from one of said valve means of one of said manifolds communicates with the second of said gas pipes of the second of said valve means from said other manifold, and the third of said gas pipes extending from the third of said valve means of one of said manifolds communicates with the fourth of said gas pipes connected to the fourth of said valve means from said other manifold.

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