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EVACUATOR SYSTEM AND APPARATUS

  • US 3,565,076 A
  • Filed: 05/22/1968
  • Issued: 02/23/1971
  • Est. Priority Date: 05/22/1968
  • Status: Expired due to Term
First Claim
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1. A pressure relieving evacuator system, comprising:

  • a substantially closed receptacle having an inlet passage and an outlet passage;

    a source of vacuum pressure having a vacuum pressure outlet coupled to the outlet passage of said receptacle and creating vacuum pressure therein;

    a pressure transducer means, including a movable element and a pressure chamber, wherein said movable element is displaced relative to a given position in response to variations of pressure within said pressure chamber;

    the said pressure chamber having a vacuum pressure inlet coupled to the said outlet passage of said receptacle;

    controllable air valve means, movable under control between an open position and a closed position, said air valve means being coupled to said pressure chamber for admitting external air pressure into said chamber when in said open position;

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