Method and arrangement on a vessel

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5074813
SERIAL NO

07573730

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Method and arrangement for the reduction of the resistance to rotation of the propeller (3) of a ship (1) going in ice when the ice increases the resistance to rotation of the propeller to a level higher than when sailing in open water. When the resistance to rotation increases, gas is passed to the propeller (3), and the supply of gas is adjusted when the resistance to rotation is changed. The supply of gas may be continual, but as a rule it is used only for short periods in order to correct the speed of rotation of the propeller to the appropriate level.

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Patent Owner(s)

Patent OwnerAddress
RAUMA-REPOLA OYSNELLMANNINKATU 13 00170 HELSINKI

International Classification(s)

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  • 1990 Application Filing Year
  • B63H Class
  • 225 Applications Filed
  • 5 Patents Issued To-Date
  • 2.23 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances1990199119921993199419951996199719980255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Heikinheimo, Juha A Helsinki, FI 2 5
Hirvonen, Erkki V E Kerava, FI 2 5
Jarvi, Antti K H Espoo, FI 3 12

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  • 3 Citation Count
  • B63H Class
  • 0 % this patent is cited more than
  • 34 Age
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