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Variable geometry nozzle

  • US 4,754,924 A
  • Filed: 04/03/1987
  • Issued: 07/05/1988
  • Est. Priority Date: 04/03/1987
  • Status: Expired due to Fees
First Claim
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1. A nozzle for a jet engine operating in ambient air, said nozzle having a flow through passage for effluent gases and comprising:

  • a first rotary valve of the sleeve type, having an open state and a closed state,a second rotary valve of the face type, having an open state and a closed state,a fixed portion anda movable portion,said movable portion being assembled with and movable relative to said fixed portion to a first setting and second setting,means for moving said movable portion to said first setting and to said second setting,said first and second valves being in said open states when said movable portion is in said first setting and in said closed states when said movable portion is in said second state,said first rotary valve providing at least one first passage from said ambient air to said flow through passage when said first valve is in said open state and said second rotary valve providing atleast one passage from said flow through passage to said ambient air when said second valve is in said open state,said at least one first and second passages being closed off when said first and second valves are in said closed states,whereby, when said nozzle is in said first setting said first and second valves are in said open states and air flows through said at least one first passage into said flow through passage and gasses flow through said at least one second passage into said ambient air.

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