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1. (WO2013160801) UNDERWATER PROPELLER DEVICE WITH PULSED JETS

Pub. No.:    WO/2013/160801    International Application No.:    PCT/IB2013/053014
Publication Date: Fri Nov 01 00:59:59 CET 2013 International Filing Date: Wed Apr 17 01:59:59 CEST 2013
IPC: B63H 11/02
B63H 11/04
Applicants: SCUOLA SUPERIORE DI STUDI UNIVERSITARI E DI PERFEZIONAMENTO SANT'ANNA
Inventors: ARIENTI, Andrea
GIORGIO SERCHI, Francesco
Title: UNDERWATER PROPELLER DEVICE WITH PULSED JETS
Abstract:
The present invention refers to a device, which is autonomous or which can be associated with another structure, for propulsion in a liquid environment, which can be used in many fields, from underwater exploration to checking on and maintaining equipment to mini-invasive surgery. More precisely, the invention relates to an underwater propeller device comprising: a bladder body (1) completely made of a soft material, developing along and around a central longitudinal axis (X), defining an internal chamber (2) between a dorsal wall (11, 22) and a ventral wall (21); in said bladder body (1), an inlet opening (3) and an outlet opening (4) of a liquid in and out of said chamber (2), arranged at a longitudinal end of the body; and drive means (5, 91) for driving a contraction of said bladder, arranged on said dorsal wall and comprising a mechanical connection with said ventral (21) to cyclically attract the ventral wall to the dorsal wall, thereby causing a pulsed ejection of a propeller jet from said chamber through said outlet opening (4).