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:
May. 29, 1990
Filed:
Nov. 16, 1988
Jean-Pierre Guezou, Athis-Mons, FR;
Jacques Pichard, Meudon, FR;
L'Etat Francais, , FR;
Abstract
Vessel provided with at least one water jet propulsion unit consisting of a casing containing, between an intake (3) tangential to the hull (2) and a rear water outlet (4), a duct (5) upstream of the propulsion device, an impeller (6), fixed flow-correction guide vanes (7) and a tail cone (8) carried by the blades which with the casing (9) form the tail pipe (10). The cross section of the tail pipe (10) varies but within narrow limits between the vanes (7) and the outlet (4) by virtue of a number of gas injection slots situated in the area of the trailing edges of the vanes (7) and connected by a circuit to a supply of compressed gas (16). The gas supply circuit includes an external annular chamber (14) formed within the casing and the shroud surrounding the vanes (7) and connected to the injection slots (25, 26, 29). Of application to vessels requiring very high thrusts.