Fluid for traction drive
AssigneeIdemitsu Kosan Co., Ltd.
InventorsToshiyuki Tsubouchi, Hitoshi Hata
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Abstract
A fluid for traction drive is described, containing a liquid material as a base stock wherein the liquid material is prepared by bringing naphthalene or tetralin into contact with a Friedel-Crafts catalyst and then hydrogenating the resulting compounds. This traction drive fluid exhibits a superior traction coefficient from low temperature to elevated temperature and further has a low viscosity. Thus the fluid contributes to the production of small-sized drive mechanisms and can be widely used in various machines.
Claims10
A process for improving the coefficient of traction between at least two relatively rotatable elements in a torque transmitting relationship and for maintaining said coefficient of traction substantially constant over a broad range of operating temperatures which comprises introducing between the tractive surfaces of said elements a traction drive fluid comprising as the active component at least one compound selected by the general formulae (I), (II) and (III):
- ##STR18## wherein R.sub.1 and R.sub.2 are each a hydrogen or methyl group, said traction drive fluid being essentially free of 2,2'-bisdecalin.
A traction drive fluid composition for use between two relatively rotatable elements in a torque transmitting relationship which comprises as the active component at least one compound represented by the formulae (I), (II) and (III):
- ##STR19## wherein R.sub.1 and R.sub.2 are each a hydrogen or methyl group, said traction drive fluid being essentially free of 2,2'-bisdecalin.
Dependencies are inferred from the claim text.