The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 10, 2003
Filed:
May. 23, 2001
Jan Häggander, Trollhättan, SE;
Jan Östlund, Lidköping, SE;
Mats Olofsson, Trollhättan, SE;
John Änggård, Johanneshov, SE;
Volvo Aero Corporation, Trollhättan, SE;
Abstract
The invention refers to a full-flow rocket nozzle having a longitudinal contour essentially corresponding to a parabola. For obtaining a flow separation control and also a side load reduction the invention suggests that the parabola contour shape from the point of 50% expansion ratio onwards or more distant from the throat of the nozzle is changing over into (i) strictly conical shape having an angle to the center line of between 15° and 25°, (ii) a slight outward curvature, i.e. implying a contour shape with positive 2 derivative of the radius r, or (iii) a slight inward curvature, i.e. with a negative 2 derivative of r but lying externally of the parabola contour, in the last case the 3 derivative of r being constantly equal to zero (0).