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:
Oct. 10, 2017
Filed:
May. 13, 2015
Abb Oy, Helsinki, FI;
Jussi Kiiskila, Helsinki, FI;
Ville Kortelainen, Helsinki, FI;
Mirva Nevalainen, Helsinki, FI;
Tero Tamminen, Helsinki, FI;
ABB Oy, Helsinki, FI;
Abstract
A propulsion unit is disclosed with a hollow strut having an upper portion with an upper end portion passing through a passage (P) formed between a first outer bottom and a second inner bottom in a vessel. The upper end portion is rotatably supported with a slewing bearing and sealed with a slewing seal towards the vessel. A cooling arrangement includes a cooling air duct system, at least one fan and at least one cooling unit. The slewing seal can include an upper slewing seal and a lower slewing seal at a vertical distance (H) from each other with a space formed between the slewing seals. The upper end portion has openings (O) into the space between the slewing seals. A first cooling air duct is directed to this space, whereby cooling air (L) can be circulated through the first cooling air duct () into the space and through the openings (O) in the upper end portion to the interior of the strut, or return air (L) can be circulated from the strut in an opposite direction.