Patent US3971267A successfully refreshed from Google Patents.
US3971267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed change gear system
Assignee: Aisin Corp
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Filing: 1974-08-29
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Granted: 1976-07-27
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Expires: 1994-08-29
Abstract
Abstract A speed change gear system for providing at least four forward drive speed ranges and one reverse drive speed range includes two planetary gear sets of the single-pinion type and one planetary gear set of the double-pinion type, two clutches, and three brakes. As a result of the coupling and uncoupling of the clutches and brakes, the movable elements of each of the planetary gear sets are suitably coupled so as to attain the various speed ranges.
Inventors
- 👤 Noboru Murakami
- 👤 Koichi Matsuo
- 👤 Koichiro Hirosawa
- 👤 Kazuo Ohara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:58
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H3/666; F16H2003/445; F16H2200/00; F16H2200/003; F16H2200/0043; F16H2200/0047; F16H2200/0052; F16H2200/0056; F16H2200/0065; F16H2200/20; F16H2200/2002; F16H2200/201; F16H2200/2012; F16H2200/203; F16H2200/2046; F16H2200/2048
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
265 words
A speed change gear system comprising: an input shaft; a first sun gear; a first brake capable of locking said first sun gear to a gear casing; a first planetary gear engaged with said first sun gear; a secondary planetary gear engaged with said first planetary gear; a first ring gear engaged with said secondary planetary gear; a first carrier rotatably supporting said first and second planetary gears; a second ring gear drivingly engaged to said first carrier; a third planetary gear engaged with said second ring gear; a second sun gear engaged with said third planetary gear; a second carrier rotatably supporting said third planetary gear; a third sun gear drivingly engaged with said second sun gear; a fourth planetary gear engaged with said third sun gear; a third ring gear drivingly engaged with said first ring gear as well as with said fourth planetary gear; a third carrier rotatably supporting said fourth planetary gear and engaged with said first carrier and said second ring gear; a first clutch for coupling or uncoupling said input shaft and said first carrier, said third carrier and said second ring gear; a second clutch for coupling or uncoupling said input shaft and said first ring gear; a third clutch coupling or uncoupling said input shaft and said first sun gear; a second brake capable of locking said first carrier, said third carrier and said second ring gear to said gear casing; a third brake capable of locking said second and third sun gears to said gear casing; and an output shaft drivingly engaged with said second carrier.
Claim 2
Dependent Claim
265 words
A speed change gear system comprising: an input shaft; a first sun gear; a first brake capable of locking said first sun gear to a gear casing; a first planetary gear engaged with said first sun gear; a secondary planetary gear engaged with said first planetary gear; a first ring gear engaged with said secondary planetary gear; a first carrier rotatably supporting said first and second planetary gears; a second ring gear drivingly engaged to said first carrier; a third planetary gear engaged with said second ring gear; a second sun gear engaged with said third planetary gear; a second carrier rotatably supporting said third planetary gear; a third sun gear drivingly engaged with said second sun gear; a fourth planetary gear engaged with said third sun gear; a third ring gear drivingly engaged with said first ring gear as well as with said fourth planetary gear; a third carrier rotatably supporting said fourth planetary gear and engaged with said first carrier and said second ring gear; a first clutch for coupling or uncoupling said input shaft and said first carrier, said third carrier and said second ring gear; a second clutch for coupling or uncoupling said input shaft and said first ring gear; a third clutch coupling or uncoupling said input shaft and said first sun gear; a second brake capable of locking said first carrier, said third carrier and said second ring gear to said gear casing; a third brake capable of locking said second and third sun gears to said gear casing; and an output shaft drivingly engaged with said second carrier.
Claim 3
Dependent Claim
77 words
A speed change gear system as set forth in claim 1, additionally comprising: a fourth ring gear drivingly engaged with said second and third sun gears; a fifth planetary gear engaged with said fourth ring gear; a fourth carrier rotatably supporting said fifth planetary gear; a fourth brake being capable of locking said fourth carrier to said gear casing; and a fourth sun gear engaged with said fifth planetary gear and rotatably engaged with said output shaft.
Claim 4
Dependent Claim
75 words
A speed change gear system as set forth in claim 1, additionally comprising: a fourth sun gear drivingly engaged with said second and third sun gears; a fifth planetary gear engaged with said fourth sun gear; a fourth carrier rotatably supporting said fifth planetary gear; a fourth brake being capable of locking said fourth carrier to said gear casing; and a fourth ring gear drivingly engaged with said fifth planetary gear and said output shaft.
Claim 5
Dependent Claim
78 words
A speed change gear system as set forth in claim 1, additionally comprising: a fourth sun gear drivingly engaged with said second and third sun gears; a fifth planetary gear engaged with said fourth sun gear; a fourth ring gear engaged with said fifth planetary gear; a fourth brake being capable of locking said fourth ring gear to said gear casing; and a fourth carrier rotatably supporting said fifth planetary gear and drivingly engaged with said output shaft.
Claim 6
Dependent Claim
82 words
A speed change gear system as set forth in claim 1, additionally comprising: a fourth sun gear drivingly engaged with said second ring gear and said first and third carriers; a fifth planetary gear engaged with said fourth sun gear; a fourth ring gear engaged with said fifth planetary gear; a fourth brake being capable of locking said fourth ring gear to said gear casing; and a fourth carrier rotatably supporting said fifth planetary gear and drivingly engaged with said output shaft.
Claim 7
Dependent Claim
249 words
A speed change gear system comprising: an input shaft; a first sun gear; a first planetary gear engaged with said first sun gear; a second planetary gear engaged with said first planetary gear; a first ring gear engaged with said second planetary gear; a first carrier rotatably supporting said first and second planetary gears; a second ring gear drivingly engaged to said first carrier; a third planetary gear engaged with said second ring gear; a second sun gear engaged with said third planetary gear; a second carrier rotatably supporting said third planetary gear; a third sun gear drivingly engaged with said second sun gear; a fourth planetary gear engaged with said third sun gear; a third ring gear drivingly engaged with said first ring gear as well as with said fourth planetary gear; a third carrier rotatably supporting said fourth planetary gear and engaged with said first carrier and said second ring gear; a first clutch for coupling or uncoupling said input shaft and said first carrier, said third carrier and said second ring gear; a second clutch for coupling or uncoupling said input shaft and said first ring gear; a third clutch coupling or uncoupling said input shaft and said first sun gear; a brake capable of locking said first carrier, said third carrier and said second ring gear to said gear casing; another brake capable of locking said second and third sun gears to said gear casing; and an output shaft drivingly engaged with said second carrier.
Claim 8
Dependent Claim
249 words
A speed change gear system comprising: an input shaft; a first sun gear; a first planetary gear engaged with said first sun gear; a second planetary gear engaged with said first planetary gear; a first ring gear engaged with said second planetary gear; a first carrier rotatably supporting said first and second planetary gears; a second ring gear drivingly engaged to said first carrier; a third planetary gear engaged with said second ring gear; a second sun gear engaged with said third planetary gear; a second carrier rotatably supporting said third planetary gear; a third sun gear drivingly engaged with said second sun gear; a fourth planetary gear engaged with said third sun gear; a third ring gear drivingly engaged with said first ring gear as well as with said fourth planetary gear; a third carrier rotatably supporting said fourth planetary gear and engaged with said first carrier and said second ring gear; a first clutch for coupling or uncoupling said input shaft and said first carrier, said third carrier and said second ring gear; a second clutch for coupling or uncoupling said input shaft and said first ring gear; a third clutch coupling or uncoupling said input shaft and said first sun gear; a brake capable of locking said first carrier, said third carrier and said second ring gear to said gear casing; another brake capable of locking said second and third sun gears to said gear casing; and an output shaft drivingly engaged with said second carrier.
Claim 9
Dependent Claim
27 words
A speed change gear system as set forth in claim 6, further comprising: an additional brake capable of locking said first sun gear to said gear casing.
Claim 10
Dependent Claim
76 words
A speed change gear system as set forth in claim 6, further comprising: a fourth ring gear drivingly engaged with said second and third sun gears; a fifth planetary gear engaged with said fourth ring gear; a fourth carrier rotatably supporting said fifth planetary gear; a brake being capable of locking said fourth carrier to said gear casing; and a fourth sun gear engaged with said fifth planetary gear and rotatably engaged with said output shaft.
Claim 11
Dependent Claim
27 words
A speed change gear system as set forth in claim 8, further comprising: an additional brake capable of locking said first sun gear to said gear casing.
Claim 12
Dependent Claim
74 words
A speed change gear system as set forth in claim 6, further comprising: a fourth sun gear drivingly engaged with said second and third sun gears; a fifth planetary gear engaged with said fourth sun gear; a fourth carrier rotatably supporting said fifth planetary gear; a brake being capable of locking said fourth carrier to said gear casing; and a fourth ring gear drivingly engaged with said fifth planetary gear and said output shaft.
Claim 13
Dependent Claim
27 words
A speed change gear system as set forth in claim 10, further comprising: an additional brake capable of locking said first sun gear to said gear casing.
Claim 14
Dependent Claim
77 words
A speed change gear system as set forth in claim 6, further comprising: a fourth sun gear drivingly engaged with said second and third sun gears; a fifth planetary gear engaged with said fourth sun gear; a fourth ring gear engaged with said fifth planetary gear; a brake being capable of locking said fourth ring gear to said gear casing; and a fourth carrier rotatably supporting said fifth planetary gear and drivingly engaged with said output shaft.
Claim 15
Dependent Claim
27 words
A speed change gear system as set forth in claim 12, further comprising: an additional brake capable of locking said first sun gear to said gear casing.
Claim 16
Dependent Claim
81 words
A speed change gear system as set forth in claim 6, further comprising: a fourth sun gear drivingly engaged with said second ring gear and said first and third carriers; a fifth planetary gear engaged with said fourth sun gear; a fourth ring gear engaged with said fifth planetary gear; a brake being capable of locking said fourth ring gear to said gear casing; and a fourth carrier rotatably supporting said fifth planetary gear and drivingly engaged with said output shaft.
Claim 17
Dependent Claim
27 words
A speed change gear system as set forth in claim 14, further comprising: an additional brake capable of locking said first sun gear to said gear casing.
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) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |