Counter-rotating transmission
OwnerRobert C. Eakininventor
Life of this patent
Estimating the term…
Abstract
A transmission, for use with a drive shaft carrying a driving pulley, comprises a frame having a front and a back. The back of the frame has an opening for receiving the drive shaft and the driving pulley while the front of the frame has an opening for receiving a transmission assembly. The transmission assembly comprises a primary driven shaft carrying a pulley and a hollow, secondary, driven shaft coaxial with the primary driven shaft. A drive gear is carried by the primary driven shaft. An idler gear is driven by the drive gear and a driven gear, carried by the secondary driven shaft, is driven by the idler gear to effect rotation of the secondary driven shaft in a direction opposite to the direction of rotation of the primary driven shaft.
Claims10
An airboat, comprising:
- a hull;
- an engine carried by said hull, said engine having a drive shaft;
- a primary driven shaft carrying a first propeller;
- a belt connecting said drive shaft to said primary driven shaft;
- a hollow, secondary, driven shaft coaxial with said primary driven shaft and carrying a second propeller;
- a drive gear carried by said primary driven shaft;
- an idler gear driven by said drive gear;
- a driven gear, carried by said secondary driven shaft, and driven by said idler gear to effect rotation in a direction opposite to the direction of rotation of said primary driven shaft;
- and
- a rudder carried by said hull.
A drive system for driving a pair of counter-rotating shafts, comprising:
- a drive shaft carrying a drive pulley;
- a primary driven shaft carrying a first propeller on one end and a driven pulley on another end, said drive pulley and said driven pulley sized to effect speed reduction;
- a belt connecting said drive pulley to said driven pulley;
- a hollow, secondary, driven shaft coaxial with said primary driven shaft and carrying a second propeller;
- a drive gear carried by said primary driven shaft;
- an idler gear driven by said drive gear;
- and
- a driven gear, carried by said secondary driven shaft, and driven by said idler gear to effect rotation in a direction opposite to the direction of rotation of said primary driven shaft.
Dependencies are inferred from the claim text.