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Pneumatic controls for ophthalmic surgical system

  • US 5,417,246 A
  • Filed: 09/27/1993
  • Issued: 05/23/1995
  • Est. Priority Date: 10/27/1989
  • Status: Expired due to Term
First Claim
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1. An improved intraocular pressure system of the type powered by a source of compressed gas and including at least one pressure regulator means for limiting gas pressure to a predetermined maximum value, first electromagnetically-actuated valve means for controlling flow of the compressed gas from the source to a location where such gas is put to use, and a second electromagnetically-actuated valve means for controlling flow of the compressed gas from the location to atmosphere to reduce pressure at such location, the improvement comprising:

  • third electromagnetically-actuated valve means for interrupting flow from the first valve means to the location; and

    variable volume gas reservoir means for accumulating additional compressed gas for later use, the reservoir means being located downstream of the first and third valve means.

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