US3763719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-speed automatic transmission
Assignee: Motors Liquidation Co
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Filing: 1972-06-27
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Granted: 1973-10-09
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Expires: 1992-06-27
Abstract
Abstract A multi-speed automatic transmission having two friction clutches and three friction brakes, all of which are selectively operable to provide a plurality of speed ratios between an input and output shaft through a compound planetary gear set. The gear set includes a pair of sun gears, a pair of ring gears and a plurality of pinion gears which mesh with the sun and ring gears and are rotatably mounted on a carrier which is drivingly connected to the output shaft. The ratio of the pitch diameters (R1/R2) of the ring gears and the ratio of the pitch diameters (S1/S2) of the sun gears are both greater than one (1.00). The steps between the speed ratios are such as to provide substantially equal output speed steps at a constant input upshift speed.
Inventors
- 👤 J Malloy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:37
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H3/663
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
In a multi-speed transmission, stationary housing means; input means; output means; first and second selectively operable clutch means operatively connected to said input means; first, second and third selectively operable brake means operatively connected to said housing means; and planetary gear-ing means including a first sun gear operatively connected to said first clutch means, first ring gear means operatively connected to said second clutch means and said first brake means; a second sum gear operatively connected to said second brake means and having a pitch diameter smaller than said first sun gear; a second ring gear operatively connected to said third brake means and having a pitch diameter smaller first sun said first ring gear, first pinion means drivingly connected to said firstsun gear and said second ring gear, second pinion means drivingly connected to said first ring gear, said second sun gear and said first pinion means; and carrier means rotatably supporting said first and second pinion means and being drivingly connected to said output means.
Claim 2
Dependent Claim
167 words
In a multi-speed transmission, stationary housing means; input means; output means; first and second selectively operable clutch means operatively connected to said input means; first, second and third selectively operable brake means operatively connected to said housing means; and planetary gear-ing means including a first sun gear operatively connected to said first clutch means, first ring gear means operatively connected to said second clutch means and said first brake means; a second sum gear operatively connected to said second brake means and having a pitch diameter smaller than said first sun gear; a second ring gear operatively connected to said third brake means and having a pitch diameter smaller first sun said first ring gear, first pinion means drivingly connected to said firstsun gear and said second ring gear, second pinion means drivingly connected to said first ring gear, said second sun gear and said first pinion means; and carrier means rotatably supporting said first and second pinion means and being drivingly connected to said output means.
Claim 3
Dependent Claim
186 words
In a multi-speed transmission, stationAry housing means; input means; output means; first and second selectively operable clutch means operatively connected to said input means; first, second and third selectively operable brake means operatively connected to said housing means; and planetary gearing means including an input sun gear means operatively connected to said first clutch means, input-reaction ring gear means operatively connected to said second clutch means and said first brake means; reaction sun gear means operatively connected to said second brake means and having a pitch diameter smaller than said input sun gear means; reaction ring gear means operatively connected to said third brake means and having a pitch diameter smaller than said input-reaction ring gear means, first pinion means drivingly connected to said input sun gear means and said reaction ring gear means, second pinion means drivingly connected to said input-reaction ring gear means and said first pinion means; third pinion means drivingly connected to said reaction sun gear means and said first pinion means; and carrier means rotatably supporting said first, second and third pinion means and being drivingly connected to said output means.
Claim 4
Dependent Claim
186 words
In a multi-speed transmission, stationAry housing means; input means; output means; first and second selectively operable clutch means operatively connected to said input means; first, second and third selectively operable brake means operatively connected to said housing means; and planetary gearing means including an input sun gear means operatively connected to said first clutch means, input-reaction ring gear means operatively connected to said second clutch means and said first brake means; reaction sun gear means operatively connected to said second brake means and having a pitch diameter smaller than said input sun gear means; reaction ring gear means operatively connected to said third brake means and having a pitch diameter smaller than said input-reaction ring gear means, first pinion means drivingly connected to said input sun gear means and said reaction ring gear means, second pinion means drivingly connected to said input-reaction ring gear means and said first pinion means; third pinion means drivingly connected to said reaction sun gear means and said first pinion means; and carrier means rotatably supporting said first, second and third pinion means and being drivingly connected to said output means.
Claim 5
Dependent Claim
218 words
A four speed planetary transmission comprising; stationary housing means; input means; output means; and planetary gearing means for providing substantially equal output speed steps in the forward gear ratios when a constant input upshift speed is maintained including, input sun gear means, input-reaction ring gear means, reaction sun gear means, reaction ring gear means, planet carrier means drivingly connected with said output means including first planet pinion means meshing with said input sun gear means and said reaction ring gear means and second planet pinion means meshing with said input-reaction ring gear means, said reaction sun gear means and said first planet pinion means, first clutch means for selectively drivingly connecting said input means and said input sun gear means, second clutch means for selectively drivingly connecting said input means and said input-reaction ring gear means, first brake means for selectively connecting said input-reaction ring gear to said stationary housing means, second brake means for selectively connecting said reaction sun gear means with said stationary housing means and third brake means for selectively connecting said reaction ring gear means with said housing means; the ratios of the pitch diameters of the input sun gear means to the reaction sun gear means and the input-reaction ring gear means to the reaction ring gear means both being greater than 1.00.
Claim 6
Dependent Claim
218 words
A four speed planetary transmission comprising; stationary housing means; input means; output means; and planetary gearing means for providing substantially equal output speed steps in the forward gear ratios when a constant input upshift speed is maintained including, input sun gear means, input-reaction ring gear means, reaction sun gear means, reaction ring gear means, planet carrier means drivingly connected with said output means including first planet pinion means meshing with said input sun gear means and said reaction ring gear means and second planet pinion means meshing with said input-reaction ring gear means, said reaction sun gear means and said first planet pinion means, first clutch means for selectively drivingly connecting said input means and said input sun gear means, second clutch means for selectively drivingly connecting said input means and said input-reaction ring gear means, first brake means for selectively connecting said input-reaction ring gear to said stationary housing means, second brake means for selectively connecting said reaction sun gear means with said stationary housing means and third brake means for selectively connecting said reaction ring gear means with said housing means; the ratios of the pitch diameters of the input sun gear means to the reaction sun gear means and the input-reaction ring gear means to the reaction ring gear means both being greater than 1.00.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |