Resources Contact Us Home
Airboat systems and methods for increasing engine efficiency while reducing torque and noise

Image Number 9 for United States Patent #5807149.

An airboat propelling system is provided wherein a propeller is rotated by a hollow driven shaft. A further embodiment is provided wherein two propellers are rotated in opposite directions by counter-rotating coaxial hollow driven shafts. Floating stiffener bearings positioned between the coaxial hollow driven shafts suppress flexion and protect the opposing surfaces of the shafts. These innovative techniques permit a minimization of size and weight, as well as a reduction in rotational speed of the propellers, maximizing efficiency and decreasing noise.

  Recently Added Patents
Externally gapped line arrester
Adapter plate for use in mounting an audio/visual device or the like to a surface
Focus detection device and imaging apparatus having the same
Variety corn line NPAA2675
System, method and program recording medium for supply capacity estimation
Managing breakpoints in a multi-threaded environment
  Randomly Featured Patents
Method of manufacturing a leadframe having conductive elements preformed with solder bumps
Simplified cabin services system for an aircraft
Semiconductor integrated circuit with internal compensation for changes in time delay
Interactive broadband multimedia system
Indoor navigation method and system using illumination lamps
Casing conveyed well perforating apparatus and method
Insulation formed of precipitated silica and fly ash
Labelled adrenomedullin derivatives and their use for imaging and therapy
LED reflecting plate and LED device
Exercise device