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:
Feb. 21, 1978
Filed:
Jul. 26, 1976
William M Jackson, Pass Christian, MS (US);
Other;
Abstract
A two-stage axial flow steering and propulsion device has impellers operable by a right-angle reversible drive mounted on a watercraft, and a housing surrounds the blades of the impellers. The housing is mounted for rotation in opposite directions about an axis intersecting with and perpendicular to the blades' rotational axis. The device is therefore capable of a wide range of watercraft steering and propulsion maneuvers. A shroud structure in the form of a venturi-type ring surrounds each of the impellers thereby defining three separate pressure regions of positive pressure ahead of one of the impellers which pulls the fluid when rotating in one direction, a negative pressure between the impellers and a negative pressure behind the other impeller which pushes the fluid when rotating in such one direction.