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Variable speed centrifugal pump

  • US 4,332,527 A
  • Filed: 08/10/1979
  • Issued: 06/01/1982
  • Est. Priority Date: 08/10/1979
  • Status: Expired due to Term
First Claim
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1. A variable speed, variable output pump for an aircraft fuel system comprising a housing having a main inlet and a main outlet, a jet pump nozzle downstream of said main inlet, an impeller downstream of said jet nozzle and in fluid series therewith, positive displacement pump means for controllingly, drivingly connecting said impeller to the aircraft engine, the speed of said impeller relative to engine speed being variable in response to the discharge flow rate of said pump means, and valve means for controlling the discharge flow rate of said pump means thereby to vary impeller speed relative to the engine speed and for directing discharge flow of said pump means to said main outlet and to said jet nozzle to provide motive flow therefor.

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