US3824876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gear train with three planetary gear sets
Assignee: Nissan Motor Co Ltd
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Filing: 1972-09-13
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Granted: 1974-07-23
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Expires: 1992-09-13
Abstract
Abstract Gear train arrangements for transmitting a power from a driving source to a driven member at more than three speeds in one direction and another speed in the opposite direction, the gear train arrangements using basically three planetary gear sets and at least five friction elements such as clutches and brakes which are selectively actuated to selectively engage the rotary members of the three planetary gear sets to deliver an output power at the above said speeds. The gear train arrangements are specifically adapted for use in an automatic transmission system of a motor vehicle using a torque converter or fluid coupling.
Inventors
- 👤 Y Mori
- 👤 N Okazaki
- 👤 K Ohtsuka
- 👤 T Iijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:00
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H3/663; F16H57/00; F16H57/08; F16H57/10; F16H2200/00; F16H2200/003; F16H2200/0043; F16H2200/0047; F16H2200/20; F16H2200/2002; F16H2200/2007; F16H2200/201; F16H2200/2012; F16H2200/202; F16H2200/2023
Claims Analysis
Total Claims: 55
Claim 1
Independent Claim
376 words
A change speed gear train for transmitting rotary drive from a rotary drive source to a driven member, said change speed gear train comprising: 1. an input shaft connected to said source to be rotated thereby in one given direction only; 2. an output shaft connected to said driven member; 3. a first planetary gear set; 4. a second planetary gear set; 5. a third planetary gear set; 6. each of said planetary gear sets comprising firstly a rotary member in the form of an outer ring gear which is internally toothed, secondly a rotary member in the form of a sun gear which is externally toothed, thirdly a planet pinion meshing both with said ring gear and with said sun gear and fourthly a rotary member in the form of a planet carrier rotatably carrying the planet pinion; 7. said input shaft, said output shaft and said rotary members of said first, second and third planetary gear sets all being rotatable about a common axis; 8. said change speed gear train also comprising a plurality of mechanical linkages each constantly connecting together a respective pair of said rotary members to prevent rotation other than synchronous rotation of the respective pair of rotary members; 9. a first clutch and a second clutch each selectively operable to connect said input shaft to at least one respective one of said rotary members; 10. a first brake, a second brake and a third brake each selectively operable to brake at least one respective one of said rotary members against rotation about said axis; 11. said change speed gear train producing, upon rotation of said input shaft in said given direction, rotation of said output shaft selectively in said given direction, rotation of said output shaft selectively in said given direction with at least three different speeds and also selectively in the opposite direction with one speed; 12. further comprising a one-way brake preventing said pinion carriers of said first and second planetary gear sets and the ring gear of said third planetary gear set from rotating in the direction opposite to the said given direction of rotation of said input shaft; 13. the sun gears of said second and third planetary gear sets are connected constantly to each other;
Claim 2
Dependent Claim
376 words
A change speed gear train for transmitting rotary drive from a rotary drive source to a driven member, said change speed gear train comprising: 1. an input shaft connected to said source to be rotated thereby in one given direction only; 2. an output shaft connected to said driven member; 3. a first planetary gear set; 4. a second planetary gear set; 5. a third planetary gear set; 6. each of said planetary gear sets comprising firstly a rotary member in the form of an outer ring gear which is internally toothed, secondly a rotary member in the form of a sun gear which is externally toothed, thirdly a planet pinion meshing both with said ring gear and with said sun gear and fourthly a rotary member in the form of a planet carrier rotatably carrying the planet pinion; 7. said input shaft, said output shaft and said rotary members of said first, second and third planetary gear sets all being rotatable about a common axis; 8. said change speed gear train also comprising a plurality of mechanical linkages each constantly connecting together a respective pair of said rotary members to prevent rotation other than synchronous rotation of the respective pair of rotary members; 9. a first clutch and a second clutch each selectively operable to connect said input shaft to at least one respective one of said rotary members; 10. a first brake, a second brake and a third brake each selectively operable to brake at least one respective one of said rotary members against rotation about said axis; 11. said change speed gear train producing, upon rotation of said input shaft in said given direction, rotation of said output shaft selectively in said given direction, rotation of said output shaft selectively in said given direction with at least three different speeds and also selectively in the opposite direction with one speed; 12. further comprising a one-way brake preventing said pinion carriers of said first and second planetary gear sets and the ring gear of said third planetary gear set from rotating in the direction opposite to the said given direction of rotation of said input shaft; 13. the sun gears of said second and third planetary gear sets are connected constantly to each other;
Claim 3
Dependent Claim
8 words
an output shaft connected to said driven member;
Claim 4
Dependent Claim
8 words
an output shaft connected to said driven member;
Claim 5
Dependent Claim
39 words
said third clutch is connected between said input shaft on the one hand and the planet carriers of said first and second planetary gear sets and the ring gear of said third planetary gear set on the other hand;
Claim 6
Dependent Claim
39 words
said third clutch is connected between said input shaft on the one hand and the planet carriers of said first and second planetary gear sets and the ring gear of said third planetary gear set on the other hand;
Claim 7
Dependent Claim
15 words
A gear train as claimed in claim 1 and further comprising a third clutch wherein:
Claim 8
Dependent Claim
81 words
a fourth brake operatively connected to the sun gear of said fourth planetary gear set, said first clutch being couplable and said fourth brake being operable for selecting another speed lower than the first speed in said given direction, whereby said rotational power which said input shaft receives from said driving source can be transmitted to said driven member at six different speeds in said given direction and one speed in the opposite direction through actuation of said clutches and brakes.
Claim 9
Dependent Claim
81 words
a fourth brake operatively connected to the sun gear of said fourth planetary gear set, said first clutch being couplable and said fourth brake being operable for selecting another speed lower than the first speed in said given direction, whereby said rotational power which said input shaft receives from said driving source can be transmitted to said driven member at six different speeds in said given direction and one speed in the opposite direction through actuation of said clutches and brakes.
Claim 10
Dependent Claim
16 words
a fourth brake operatively connected to the sun gear of said fourth planetary gear set; and
Claim 11
Dependent Claim
16 words
a fourth brake operatively connected to the sun gear of said fourth planetary gear set; and
Claim 12
Dependent Claim
66 words
said first clutch being couplable and said fourth brake being operable for selecting another speed lower than the first speed in said given direction, whereby said rotational power which said input shaft receives from said driving source can be transmitted to said driven member at four different speeds in said given direction and one speed in the opposite direction through actuation of said clutches and brakes.
Claim 13
Dependent Claim
66 words
said first clutch being couplable and said fourth brake being operable for selecting another speed lower than the first speed in said given direction, whereby said rotational power which said input shaft receives from said driving source can be transmitted to said driven member at four different speeds in said given direction and one speed in the opposite direction through actuation of said clutches and brakes.
Claim 14
Dependent Claim
14 words
said second clutch and third clutch are operable to select a direct speed; and
Claim 15
Dependent Claim
14 words
said second clutch and third clutch are operable to select a direct speed; and
Claim 16
Dependent Claim
11 words
A gear train as claimed in claim 1 and further comprising:
Claim 17
Dependent Claim
5 words
a first planetary gear set;
Claim 18
Dependent Claim
5 words
a first planetary gear set;
Claim 19
Dependent Claim
5 words
a second planetary gear set;
Claim 20
Dependent Claim
5 words
a second planetary gear set;
Claim 21
Dependent Claim
18 words
said third clutch and said first brake are operable to select an overdrive speed in said given direction.
Claim 22
Dependent Claim
18 words
said third clutch and said first brake are operable to select an overdrive speed in said given direction.
Claim 23
Dependent Claim
11 words
A gear train as claimed in claim 2 and further comprising:
Claim 24
Dependent Claim
5 words
a third planetary gear set;
Claim 25
Dependent Claim
5 words
a third planetary gear set;
Claim 26
Dependent Claim
70 words
each of said planetary gear sets comprising firstly a rotary member in the form of an outer ring gear which is internally toothed, secondly a rotary member in the form of a sun gear which is externally toothed, thirdly a planet pinion meshing both with said ring gear and with said sun gear and fourthly a rotary member in the form of a planet carrier rotatably carrying the planet pinion;
Claim 27
Dependent Claim
70 words
each of said planetary gear sets comprising firstly a rotary member in the form of an outer ring gear which is internally toothed, secondly a rotary member in the form of a sun gear which is externally toothed, thirdly a planet pinion meshing both with said ring gear and with said sun gear and fourthly a rotary member in the form of a planet carrier rotatably carrying the planet pinion;
Claim 28
Dependent Claim
26 words
said input shaft, said output shaft and said rotary members of said first, second and third planetary gear sets all being rotatable about a common axis;
Claim 29
Dependent Claim
26 words
said input shaft, said output shaft and said rotary members of said first, second and third planetary gear sets all being rotatable about a common axis;
Claim 30
Dependent Claim
37 words
said change speed gear train also comprising a plurality of mechanical linkages each constantly connecting together a respective pair of said rotary members to prevent rotation other than synchronous rotation of the respective pair of rotary members;
Claim 31
Dependent Claim
37 words
said change speed gear train also comprising a plurality of mechanical linkages each constantly connecting together a respective pair of said rotary members to prevent rotation other than synchronous rotation of the respective pair of rotary members;
Claim 32
Dependent Claim
25 words
a first clutch and a second clutch each selectively operable to connect said input shaft to at least one respective one of said rotary members;
Claim 33
Dependent Claim
25 words
a first clutch and a second clutch each selectively operable to connect said input shaft to at least one respective one of said rotary members;
Claim 34
Dependent Claim
29 words
a first brake, a second brake and a third brake each selectively operable to brake at least one respective one of said rotary members against rotation about said axis;
Claim 35
Dependent Claim
29 words
a first brake, a second brake and a third brake each selectively operable to brake at least one respective one of said rotary members against rotation about said axis;
Claim 36
Dependent Claim
52 words
said change speed gear train producing, upon rotation of said input shaft in said given direction, rotation of said output shaft selectively in said given direction, rotation of said output shaft selectively in said given direction with at least three different speeds and also selectively in the opposite direction with one speed;
Claim 37
Dependent Claim
52 words
said change speed gear train producing, upon rotation of said input shaft in said given direction, rotation of said output shaft selectively in said given direction, rotation of said output shaft selectively in said given direction with at least three different speeds and also selectively in the opposite direction with one speed;
Claim 38
Dependent Claim
44 words
further comprising a one-way brake preventing said pinion carriers of said first and second planetary gear sets and the ring gear of said third planetary gear set from rotating in the direction opposite to the said given direction of rotation of said input shaft;
Claim 39
Dependent Claim
44 words
further comprising a one-way brake preventing said pinion carriers of said first and second planetary gear sets and the ring gear of said third planetary gear set from rotating in the direction opposite to the said given direction of rotation of said input shaft;
Claim 40
Dependent Claim
17 words
the sun gears of said second and third planetary gear sets are connected constantly to each other;
Claim 41
Dependent Claim
17 words
the sun gears of said second and third planetary gear sets are connected constantly to each other;
Claim 42
Dependent Claim
16 words
The pinion carrier of said third planetary gear set is connected constantly to said output shaft;
Claim 43
Dependent Claim
16 words
The pinion carrier of said third planetary gear set is connected constantly to said output shaft;
Claim 44
Dependent Claim
195 words
The pinion carrier of said third planetary gear set is connected constantly to said output shaft; 15. said first clutch being operatively connected between said input shaft and the sun gear of said first planetary gear set and couplable for selecting the one speed in the direction opposite to said normal direction; 16. said second clutch being operatively connected between said input shaft on the one hand and the sun gears of said second and third planetary gear sets and couplable for selecting the first, second, and third speeds in said given direction; 17. said first brake being operatively connected between said first clutch and to the sun gear of said first planetary gear set and operable for selecting the third speed in said given direction; 18. said second brake being operatively connected to the pinion carriers of said first and second planetary gear sets and the ring gear of the third planetary gear set and operable for selecting the one speed in said opposite direction; and 19. said third brake being operatively connected to the ring gear of said second planetary gear set and operable for selecting the second speed in said given direction.
Claim 45
Dependent Claim
195 words
The pinion carrier of said third planetary gear set is connected constantly to said output shaft; 15. said first clutch being operatively connected between said input shaft and the sun gear of said first planetary gear set and couplable for selecting the one speed in the direction opposite to said normal direction; 16. said second clutch being operatively connected between said input shaft on the one hand and the sun gears of said second and third planetary gear sets and couplable for selecting the first, second, and third speeds in said given direction; 17. said first brake being operatively connected between said first clutch and to the sun gear of said first planetary gear set and operable for selecting the third speed in said given direction; 18. said second brake being operatively connected to the pinion carriers of said first and second planetary gear sets and the ring gear of the third planetary gear set and operable for selecting the one speed in said opposite direction; and 19. said third brake being operatively connected to the ring gear of said second planetary gear set and operable for selecting the second speed in said given direction.
Claim 46
Dependent Claim
35 words
said first clutch being operatively connected between said input shaft and the sun gear of said first planetary gear set and couplable for selecting the one speed in the direction opposite to said normal direction;
Claim 47
Dependent Claim
35 words
said first clutch being operatively connected between said input shaft and the sun gear of said first planetary gear set and couplable for selecting the one speed in the direction opposite to said normal direction;
Claim 48
Dependent Claim
40 words
said second clutch being operatively connected between said input shaft on the one hand and the sun gears of said second and third planetary gear sets and couplable for selecting the first, second, and third speeds in said given direction;
Claim 49
Dependent Claim
40 words
said second clutch being operatively connected between said input shaft on the one hand and the sun gears of said second and third planetary gear sets and couplable for selecting the first, second, and third speeds in said given direction;
Claim 50
Dependent Claim
32 words
said first brake being operatively connected between said first clutch and to the sun gear of said first planetary gear set and operable for selecting the third speed in said given direction;
Claim 51
Dependent Claim
32 words
said first brake being operatively connected between said first clutch and to the sun gear of said first planetary gear set and operable for selecting the third speed in said given direction;
Claim 52
Dependent Claim
40 words
said second brake being operatively connected to the pinion carriers of said first and second planetary gear sets and the ring gear of the third planetary gear set and operable for selecting the one speed in said opposite direction; and
Claim 53
Dependent Claim
40 words
said second brake being operatively connected to the pinion carriers of said first and second planetary gear sets and the ring gear of the third planetary gear set and operable for selecting the one speed in said opposite direction; and
Claim 54
Dependent Claim
27 words
said third brake being operatively connected to the ring gear of said second planetary gear set and operable for selecting the second speed in said given direction.
Claim 55
Dependent Claim
27 words
said third brake being operatively connected to the ring gear of said second planetary gear set and operable for selecting the second speed in said given direction.
References Cited (Backward Citations)
US3067632A
Cited
US3483771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |