Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Image processor
Halogen-free flame retardants for epoxy resin systems
Maize variety inbred PH1CD7
Sericin cationic nanoparticles for application in products for hair and dyed hair
Instrumenting configuration and system settings
System and methods for facilitating and documenting user thinking and learning using enhanced interactive constructs
Memory device and semiconductor device
  Randomly Featured Patents
Beaded fashion accessories for use on the body
Massage device
Gain control method and gain control apparatus for digital audio signals
Pharmaceutical compositions
Current limiting apparatus for circuit breaker
Auxiliary eyewear attachment methods and apparatus and universal adapter
Method for using outgoing TCP/IP sequence number fields to provide a desired cluster node
Apparatus and method for producing two-sided patterned web in registration
Instrument panel
Color reference system for decorators