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Vacuum power system and regulator therefor

  • US 4,328,669 A
  • Filed: 02/15/1980
  • Issued: 05/11/1982
  • Est. Priority Date: 02/15/1980
  • Status: Expired due to Term
First Claim
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1. A vacuum power system having first and second devices operable by vacuum power and first and second sources of vacuum power, said first source when operating normally providing sufficient vacuum power to operate said first device and said second source providing sufficient vacuum power to operate said second device, said second source being variably operable to maintain the vacuum operating level required by said second device;

  • means sensing the lack of sufficient vacuum power from said first source to operate said first device when such lack occurs, said means then acting to communicate sufficient vacuum power from said second source to said first device to operate said first device;

    and means responsive to changes in vacuum level provided from said second source as vacuum power therefrom is used to cause said second source to be operated variably as needed to maintain at least sufficient vacuum power to operate said first and second devices.

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