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. 16, 2000
Filed:
Jul. 30, 1998
Applicant:
Inventors:
Pekka Salmi, Vantaa, FI;
Risto Kurimo, Espoo, FI;
Assignee:
Kvaerner Masa-Yards Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B63H / ; B63H / ; B63H / ;
U.S. Cl.
CPC ...
440 67 ; 114 40 ; 440 50 ;
Abstract
A service vessel that is designed for navigating both in the open sea and in ice conditions is provided with a demountable propeller nozzle. For an ice-free navigation period the propeller nozzle is mounted around the propulsion propeller of the vessel, whereas for a navigation period in ice conditions the propeller nozzle is removed. The power absorption of the propulsion propeller is maintained constant during nozzle and nozzle-free operation.