US Patent No. 9,933,054

CONTINUOUSLY VARIABLE TRANSMISSION AND AN INFINITELY VARIABLE TRANSMISSION VARIATOR DRIVE


Patent No. 9,933,054
Issue Date April 03, 2018
Title Continuously Variable Transmission And An Infinitely Variable Transmission Variator Drive
Inventorship Kenneth E. Cooper, Toledo, OH (US)
Mark R. J. Versteyhe, Oostkamp (BE)
James F. Ziech, Kalamazoo, MI (US)
Assignee Dana Limited, Maumee, OH (US)

Claim of US Patent No. 9,933,054

1. A variable transmission comprising:an input shaft;
a first ring assembly rotatably disposed in a housing, the first ring assembly drivingly engaged with the input shaft using a plurality of double planet gears rotatably disposed on the first ring assembly, the first ring assembly configured to be prevented from rotating relative to the housing by a second grounding clutch, and the first ring assembly comprising a first variator ball engagement surface that is in driving engagement with a plurality of tiltable variator balls;
a variator carrier assembly rotatably disposed in the housing and configured to be militated from rotating relative to the housing by a first grounding clutch, the variator carrier assembly comprising
a drive shaft drivingly engaged using a second sun gear engaged with a second gear of each of the double planet gears, and
an annular arrangement of the plurality of tiltable variator balls each having ball axle shafts; and
a second ring assembly rotatably disposed in the housing drivingly engaged with a vehicle output, the second ring assembly comprising and a second variator ball engagement surface that is in driving engagement with each of the variator balls,
wherein said transmission has an infinitely variable operating mode and a continuously variable operating mode.