US3640153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four-speed ratio power transmission mechanism having simple planetary gear units
Assignee: Ford Motor Co
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Filing: 1970-09-18
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Granted: 1972-02-08
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Expires: 1990-09-18
Abstract
Abstract A power transmission mechanism for use in an automotive vehicle driveline comprising a three-speed ratio gear system having two torque input elements and a simple planetary ear unit situated between the torque input shaft and the two torque input elements of the three-speed ratio gear system, and clutches and brakes adapted to control the relative motion of the gear elements whereby the torque input shaft may be connected selectively to either of the torque input elements of the three-speed ratio gear system, the simple planetary unit being adapted to multiply the torque input to one of the input elements of the three-speed ratio gear system during low-speed ratio operation thereby providing a fourth overall ratio.
Inventors
- 👤 Larry A Kepner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:32
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/06; F16H47/08; F16H47/085
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
222 words
A multiple speed ratio power transmission mechanism adapted to deliver driving torque from a driving member to a driven member comprising a three speed ratio gear system having two torque input elements and a single torque output element, a torque input gear unit having a ring gear member and a sun gear member and a carrier member, planet pinions carried by said carrier member in meshing engagement with said sun and ring gear members, said ring gear member being connected to said driving member, means for connecting the carrier member of said torque input gear unit to a first of the torque input elements of said three speed ratio gear system during operation in the lowest speed ratio, brake means for anchoring the sun gear of said torque input gear unit during operation in said lowest ratio, means for connecting together two members of said torque input gear unit to establish a ratio of unity therethrough during operation in the second speed ratio, means for connecting said driving member to a second of said torque input elements through said torque input gear unit during operation in the third speed ratio, and clutch means for connecting together the elements of said three speed ratio gear system as said torque input gear unit maintains a ratio of unity thereby establishing fourth speed ratio operation.
Claim 2
Dependent Claim
222 words
A multiple speed ratio power transmission mechanism adapted to deliver driving torque from a driving member to a driven member comprising a three speed ratio gear system having two torque input elements and a single torque output element, a torque input gear unit having a ring gear member and a sun gear member and a carrier member, planet pinions carried by said carrier member in meshing engagement with said sun and ring gear members, said ring gear member being connected to said driving member, means for connecting the carrier member of said torque input gear unit to a first of the torque input elements of said three speed ratio gear system during operation in the lowest speed ratio, brake means for anchoring the sun gear of said torque input gear unit during operation in said lowest ratio, means for connecting together two members of said torque input gear unit to establish a ratio of unity therethrough during operation in the second speed ratio, means for connecting said driving member to a second of said torque input elements through said torque input gear unit during operation in the third speed ratio, and clutch means for connecting together the elements of said three speed ratio gear system as said torque input gear unit maintains a ratio of unity thereby establishing fourth speed ratio operation.
Claim 3
Dependent Claim
86 words
The combination set forth in claim 1 wherein the clutch means for connecting together the members of said torque input gear unit includes a selectively engageable clutch interposed between the ring gear and the sun gear members of said torque input gear unit and second selectively engageable clutch means for connecting said driving member to the second of said torque input elements of said three speed ratio gear system through said first clutch means during operation in the third speed ratio and the fourth speed ratio.
Claim 4
Dependent Claim
79 words
The combination set forth in claim 1 wherein the means for connecting said first torque input element of said three speed ratio gear system to the carrier member of said torque input gear unit comprising coupling means adapted to assume a torque delivery condition during first speed ratio operation, second speed ratio operation and reverse drive operation, and reverse brake means for anchoring the second torque input element of said three speed ratio gear system during reverse drive operation.
Claim 5
Dependent Claim
79 words
The combination set forth in claim 2 wherein the means for connecting said first torque input element of said three speed ratio gear system to the carrier member of said torque input gear unit comprises coupling means adapted to assume a torque delivery condition during first speed ratio operation, second speed ratio operation and reverse drive operation, and reverse brake means for anchoring the second torque input element of said three speed ratio gear system during reverse drive operation.
Claim 6
Dependent Claim
65 words
The combination set forth in claim 3 wherein the brake means for anchoring the sun gear member of said torque input gear unit comprises an overrunning coupling interposed between said sun gear member and a stationary portion of said mechanism thereby accommodating torque reaction delivery to said stationary portion in one direction while accommodating freewheeling motion of said sun gear member in the opposite direction.
Claim 7
Dependent Claim
65 words
The combination set forth in claim 4 wherein the brake means for anchoring the sun gear member of said torque input gear unit comprises an overrunning coupling interposed between said sun gear member and a stationary portion of said mechanism thereby accommodating torque reaction delivery to said stationary portion in one direction while accommodating freewheeling motion of said sun gear member in the opposite direction.
Claim 8
Dependent Claim
83 words
The combination set forth in claim 1 wherein the brake means for anchoring the sun gear member of said torque input gear unit includes an overrunning coupling connection between said sun gear member and a stationary portion of said mechanism, said overrunning coupling connection being adapted to establish a one-way driving connection between said driving member and the sun gear member of said torque input gear unit during operation in said lowest speed ratio, in second speed ratio and in reverse drive ratio.
Claim 9
Dependent Claim
83 words
The combination set forth in claim 2 wherein the brake means for anchoring the sun gear member of said torque input gear unit includes an overrunning coupling connection between said sun gear member and a stationary portion of said mechanism, said overrunning coupling connection being adapted to establish a one-way driving connection between said driving member and the sun gear member of said torque input gear unit during operation in said lowest speed ratio, in second speed ratio and in reverse drive ratio.
References Cited (Backward Citations)
US3410157A
Cited
US3475992A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |