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SURGICAL HANDPIECE AND FLOW CONTROL SYSTEM FOR USE THEREWITH

  • US 3,693,613 A
  • Filed: 12/09/1970
  • Issued: 09/26/1972
  • Est. Priority Date: 12/09/1970
  • Status: Expired due to Term
First Claim
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1. Flow control system for removing a suspension of unwanted material in a treatment fluid from an enclosed operative site comprising, a source of treatment fluid at a certain pressure for causing said fluid to flow into the enclosed operative site including hydraulic tubing for connecting said treatment fluid source to the enclosed operative site, a source of negative pressure for withdrawing the suspension from the enclosed operative site including hydraulic tubing for connecting said negative pressure source to the enclosed operative site, a flow transducer intermediate of and interconnected by the hydraulic tubing between the negative pressure source and the enclosed operative site, for sensing the flow of suspension and for generating an electrical signal proportional to said flow, a vent valve coupled to the hydraulic tubing between said flow transducer and said negative pressure source for venting the flow of the suspension to atmospheric pressure, and electronic flow control means electrically interconnected to said flow transducer and said vent valve for sending an electrical signal to said vent valve for venting the hydraulic tubing through which said suspension flows upon sensing a predetermined signal.

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