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
Coil component
Providing base station almanac to mobile station
Chair back
Contextual search term evaluation
Logo toothbrush holder
Control circuit and control method for dimming LED lighting circuit
Zoom lens system for LED-based spotlight
  Randomly Featured Patents
Protecting method for inrush current preventing resistor
Three-lens-group zoom lens system having a zoom ratio exceeding 3.5
Parallax image pickup apparatus and image pickup method
Magnetic head
A ceramic filter for semi-ultrafiltration
Inchworm type driving mechanism
Method for producing an organic light emitting device (OLED) and OLED produced thereby
Torque wrench
Method of and apparatus for checking four-wheel steering characteristics of four-wheel-steered vehicle