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
Azole derivatives, methods for producing the same, intermediate thereof, agro-horticultural agents
Multi-wired antenna for mobile apparatus
Off-line converter with digital control
Semiconductor device with an amorphous semi-insulating layer, temperature sensor, and method of manufacturing a semiconductor device
High throughput thin film characterization and defect detection
Monitoring apparatus for monitoring communication configurations of client devices
Thermoplastic resin composition
  Randomly Featured Patents
Novel valepotriate hydrin containing medicines
Heating apparatus comprising a heat recovery apparatus
Method for producing liquid discharge head
Demolition tool
Method and apparatus for writing to memory components
Process and device for drying synthetic fibrous material
Electrode unit
Optical wavelength converter and image forming apparatus using the same
Load cells with overload protection and moment adjustment means
Intermittent AC etching of aluminum foil