US3946623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed change gear system
Assignee: Aisin Corp
•
Filing: 1974-08-29
•
Granted: 1976-03-30
•
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 planetary gear sets of the single-pinion type and simple planetary gear sets of the double-pinion type as well as a plurality of clutches and brakes. As a result of the coupling and uncoupling of the clutches and brakes, the movable elements of the 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
2026-11-02 04:22
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; F16H2200/006; F16H2200/20; F16H2200/2002; F16H2200/201; F16H2200/2012; F16H2200/203; F16H2200/2046; F16H2200/2048
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
275 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 sun gear engaged with said first ring gear; a third planetary gear engaged with said second sun gear; a second ring gear engaged with said third planetary gear; a second carrier rotatably supporting said third planetary gear and engaged with said first carrier; a third sun gear engaged with said first sun gear; a fourth planetary gear engaged with said third sun gear; a third ring gear engaged with said fourth planetary gear; a third carrier rotatably supporting said fourth planetary gear and engaged with said second ring gear; an output shaft engaged with said third carrier; a first clutch being capable of coupling or uncoupling simultaneously said first and third sun gears to or from said input shaft; a second clutch being capable of coupling or uncoupling simultaneously said first and second carriers to or from said input shaft; a third clutch being capable of coupling or uncoupling simultaneously said first ring gear and said second sun gear to or from said input shaft; a first brake being capable of locking simultaneously said first ring gear and said second sun gear to a gear casing; a second brake being capable of locking simultaneously said first and second carriers to said gear casing; and a third brake being capable of locking said third ring gear to said gear casing.
Claim 2
Dependent Claim
275 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 sun gear engaged with said first ring gear; a third planetary gear engaged with said second sun gear; a second ring gear engaged with said third planetary gear; a second carrier rotatably supporting said third planetary gear and engaged with said first carrier; a third sun gear engaged with said first sun gear; a fourth planetary gear engaged with said third sun gear; a third ring gear engaged with said fourth planetary gear; a third carrier rotatably supporting said fourth planetary gear and engaged with said second ring gear; an output shaft engaged with said third carrier; a first clutch being capable of coupling or uncoupling simultaneously said first and third sun gears to or from said input shaft; a second clutch being capable of coupling or uncoupling simultaneously said first and second carriers to or from said input shaft; a third clutch being capable of coupling or uncoupling simultaneously said first ring gear and said second sun gear to or from said input shaft; a first brake being capable of locking simultaneously said first ring gear and said second sun gear to a gear casing; a second brake being capable of locking simultaneously said first and second carriers to said gear casing; and a third brake being capable of locking said third ring gear to said gear casing.
Claim 3
Dependent Claim
17 words
A speed change gear system as set forth in claim 1 wherein said first brake is removed.
Claim 4
Dependent Claim
17 words
A speed change gear system as set forth in claim 1 wherein said first clutch is removed.
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) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |