US4521324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid for traction drive
Assignee: Idemitsu Kosan Co Ltd
•
Filing: 1983-10-07
•
Granted: 1985-06-04
•
Expires: 2003-10-07
Abstract
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.
Inventors
- 👤 Toshiyuki Tsubouchi
- 👤 Hitoshi Hata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:29
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/02; C10M105/06; C07; C07C; C07C13/00; C07C13/28; C07C13/32; C07C13/47; C07C13/48; C07C13/50; C10M2203/00; C10M2203/06; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
91 words
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 1 and R 2 are each a hydrogen or methyl group, said traction drive fluid being essentially free of 2,2'-bisdecalin.
Claim 2
Dependent Claim
91 words
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 1 and R 2 are each a hydrogen or methyl group, said traction drive fluid being essentially free of 2,2'-bisdecalin.
Claim 3
Dependent Claim
19 words
A process according to claim 1 in which the active component comprises a mixture of compounds (I) and (II).
Claim 4
Dependent Claim
20 words
A process according to claim 1 in which the active component is a mixture of compounds (I), (II) and (III).
Claim 5
Dependent Claim
23 words
A process according to claim 3 in which the combined proportion of compounds (I) and (II) is greater than that of compound (III).
Claim 6
Dependent Claim
23 words
A process according to claim 3 in which the proportion of compound (III) is greater than the combined proportion compound (I) and (II).
Claim 7
Dependent Claim
58 words
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 1 and R 2 are each a hydrogen or methyl group, said traction drive fluid being essentially free of 2,2'-bisdecalin.
Claim 8
Dependent Claim
58 words
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 1 and R 2 are each a hydrogen or methyl group, said traction drive fluid being essentially free of 2,2'-bisdecalin.
Claim 9
Dependent Claim
22 words
A traction drive fluid composition according to claim 6 in which the active component comprises a mixture of compounds (I) and (II).
Claim 10
Dependent Claim
23 words
A traction drive fluid composition according to claim 6 in which the active component comprises a mixture of compounds (I), (II) and (III).
Claim 11
Dependent Claim
26 words
A traction drive fluid composition according to claim 8 in which the combined proportion of compounds (I) and (II) is greater than that of compound (III).
Claim 12
Dependent Claim
27 words
A traction drive fluid composition according to claim 8 in which the proportion of compound (III) is greater than the combined proportion of compounds (I) and (II).
References Cited (Backward Citations)
US3336407A
Cited
US3411369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |