F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
74/202, 74/280
F16H 3/08 (2006.01) F16D 23/06 (2006.01) F16F 15/12 (2006.01) F16H 57/00 (2006.01)
Patent
CA 1268060
ABSTRACT OF THE INVENTION A torsional vibration viscous damper coupling arrangement for a manual transmission countershaft. The coupling includes a first driven gear journalled on the countershaft and in constant mesh with the input shaft gear. A second driven gear is fixed on the countershaft and is in constant mesh with a speed gear journalled on the main shaft. The first and second driven gears each have a set of longitudinally extending mirror image axial teeth sized to mesh in a loose fitting manner. A diamediate through-bore extends through the countershaft intermediate the first and second driven gears. The spaces between the teeth communicate with the through-bore to define a viscous fluid chamber enclosed by a sleeve surrounding the meshed teeth and sealed to the driven gears. Viscous fluid in the chamber provides a dampening medium obviating the transfer of torsion vibrations from the input shaft to the countershaft. Thus, the coupling isolates all the drive shaft speed gears, in mesh with the countershaft drive gears, from any input shaft torsional vibrations.
523755
Macrae & Co.
New Venture Gear Inc.
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