US4848507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torque-dependent power transmission system
Assignee: Honda Motor Co Ltd
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Filing: 1988-01-27
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Granted: 1989-07-18
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Expires: 2008-01-27
Abstract
Abstract To the end of eliminating the problems arising from substantially rigid connection between a front wheel set and a rear wheel set in a four-wheel drive vehicle, there is provided a power transmission system in which a torque-dependent power transmission device is provided between the front wheel set and the rear wheel set so that both the wheel sets are substantially rigidly connected to each other in a low torque range and rotational power is transmitted only from the front wheel set to the rear wheel set in a high torque range. The power transmission device of this kind can be conveniently formed by a parallel combination of a one-way clutch and a torque limiter.
Inventors
- 👤 Katsuhiko Masuda
- 👤 Kazuhiko Shimada
- 👤 Tetsuro Hamada
- 👤 Kazunori Shibuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:56
CPC Classifications
F; F16; F16D; F16D47/00; F16D47/06; B; B60; B60K; B60K17/00; B60K17/34; B60K17/348; B60K17/35; B60K17/3505; F16D41/00; F16D41/04; F16D41/06; F16D41/069; F16D41/07
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
A power transmission system for a vehicle having at least a front wheel set and a rear wheel set which are driven by a common power source, comprising: a combination of a one-way clutch means and a torque limiting means which transmits rotational power both ways between its input member and its output member in a low torque range and transmits rotational power only from the input member to the output member in a high torque range; and a power splitting means for splitting power from the common power source between the front wheel set and the rear wheel set; the one-way clutch means and the torque limiting means being connected to each other in a mutually parallel relationship while the parallel combination of the one-way clutch means and the torque limiting means is connected in series with the power splitting means in a path of power transmission between the front wheel set and the rear wheel set.
Claim 2
Dependent Claim
158 words
A power transmission system for a vehicle having at least a front wheel set and a rear wheel set which are driven by a common power source, comprising: a combination of a one-way clutch means and a torque limiting means which transmits rotational power both ways between its input member and its output member in a low torque range and transmits rotational power only from the input member to the output member in a high torque range; and a power splitting means for splitting power from the common power source between the front wheel set and the rear wheel set; the one-way clutch means and the torque limiting means being connected to each other in a mutually parallel relationship while the parallel combination of the one-way clutch means and the torque limiting means is connected in series with the power splitting means in a path of power transmission between the front wheel set and the rear wheel set.
Claim 3
Dependent Claim
42 words
A power transmission system as defined in claim 1, wherein the power splitting means consists of a viscous coupling which is connected between input ends of a pair of differential devices for the front wheel set and the rear wheel set, respectively.
Claim 4
Dependent Claim
75 words
A power transmission system as defined in claim 1, wherein the power splitting means consists of a viscous coupling having an input end which is connected to the power source and a pair of output ends which are connected to axles of one of the wheel sets; the parallel combination of the one-way clutch means and the torque limiting means being connected between the power source and the input end of the viscous coupling means.
Claim 5
Dependent Claim
146 words
A power transmission system for a vehicle having at least a front wheel set and a rear wheel set which are driven by a common power source, comprising: a parallel combination of a one-way clutch means and a torque limiting means which transmits rotational power both ways between its input member and its output member in a low torque range and transmits rotational power only from the input member to the output member in a high torque range; the parallel combination of the one-way clutch means and the torque limiting means being connected in a path of power transmission between the power source and the rear wheel set; and wherein the parallel combination of the one-way clutch means and the torque limiting means is connected in the path of power transmission between the power source and the rear wheel set in series with a viscous coupling.
Claim 6
Dependent Claim
146 words
A power transmission system for a vehicle having at least a front wheel set and a rear wheel set which are driven by a common power source, comprising: a parallel combination of a one-way clutch means and a torque limiting means which transmits rotational power both ways between its input member and its output member in a low torque range and transmits rotational power only from the input member to the output member in a high torque range; the parallel combination of the one-way clutch means and the torque limiting means being connected in a path of power transmission between the power source and the rear wheel set; and wherein the parallel combination of the one-way clutch means and the torque limiting means is connected in the path of power transmission between the power source and the rear wheel set in series with a viscous coupling.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |