3593685

Information

• Patent Grant
• 3593685

• References
• Source

• Patent Number

  3,593,685

• Date Filed

  Not available

• Date Issued

  Tuesday, July 20, 1971
  53 years ago

• CPC

  • B63B1/38 - using air bubbles or air layers gas filled volumes
  • B63H1/20 - Hubs Blade connections
  • B63H1/26 - Blades
  • B63H1/28 - Other means for improving propeller efficiency
  • B63H20/285 - Cooling-water intakes
  • B63B2001/387 - using means for producing a film of air or air bubbles over at least a significant portion of the hull surface
  • B63H2023/346 - comprising hollow shaft members
  • Y02T70/122 - Air lubrication, air cavity systems

• US Classifications

  • 114 - Ships