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
Automated dynamic differential data processing
Computer server capable of supporting CPU virtualization
Clostridium chauvoei polypeptide, DNA encoding the polypeptide and a vaccine comprising the polypeptide
Summarization of short comments
Memory device and self interleaving method thereof
Control method and allocation structure for flash memory device
  Randomly Featured Patents
Spoiler for an aerodynamic body of an aircraft
Technique for tracing source addresses of packets
Wire cable reinforced carrying strap
Buried power buss utilized as a ground strap for high current, high power semiconductor devices and a method for providing the same
Self-service sources for secure search
Inflatable three-dimensional display
Dynamically adjusting and predicting image segmentation threshold
Working force quantity imparting member, working force quantity imparting structure and lens barrel
Surgical universal positioning block and tool guide
Portion for a toothbrush