US4056988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving system for use in motor vehicle
Assignee: Toyota Motor Corp
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Filing: 1976-08-06
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Granted: 1977-11-08
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Expires: 1996-08-06
Abstract
Abstract A driving system acting in conjunction with a motor vehicle having a torque convertor coaxially coupled to the output shaft of the engine, and transfer means having a driving gear coaxially coupled to the output shaft of the overdrive means and a driven gear coupled to its driving gear. Overdrive means having a planetary gear mechanism are coaxially coupled to the output shaft of the torque convertor, and include an output shaft coupled to the driving gear of the transfer means. An automatic transmission is coaxially coupled to the driven gear of the transfer means and includes a planetary mechanism and friction engaging means to provide the desired mode of operation. A differential gear having a driving gear coupled to the output shaft of the automatic transmission drives the motor vehicle. The automatic transmission is positioned below the overdrive means. The torque convertor is positioned in side-by-side relation with the overdrive means, and the differential gear is positioned in side-by-side relation with the automatic transmission an below the torque convertor and the overdrive means. This overdrive means is removably coaxially coupled to the output shaft of the torque convertor, allowing an optional installation thereof.
Inventors
- 👤 Seitoku Kubo
- 👤 Kojiro Kuramochi
- 👤 Kunio Morisawa
- 👤 Kiyoshi Ohnuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:54
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/62; F16H3/66; F16H2200/00; F16H2200/003; F16H2200/0043
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
161 words
In a driving system acting in conjunction with a motor vehicle engine having an output shaft, the improvement comprising: a torque convertor coaxially coupled to the output shaft of the engine and having an output shaft, transfer means having a driving gear coaxially coupled to the output shaft of the torque convertor and a driven gear coupled to said driving gear, overdrive means having a planetary gear mechanism also coaxially coupled to the output shaft of said torque convertor and an output shaft coaxially but removably coupled to said driving gear of said transfer means, an automatic transmission coaxially coupled to said driven gear of said transfer means, having a planetary mechanism and friction engaging means to provide the desired mode of operation, and an output shaft on which said driven gear of said transfer means is coaxially mounted, and a differential gear having a driving gear coupled to the output shaft of said automatic transmission for driving the motor vehicle.
Claim 2
Dependent Claim
161 words
In a driving system acting in conjunction with a motor vehicle engine having an output shaft, the improvement comprising: a torque convertor coaxially coupled to the output shaft of the engine and having an output shaft, transfer means having a driving gear coaxially coupled to the output shaft of the torque convertor and a driven gear coupled to said driving gear, overdrive means having a planetary gear mechanism also coaxially coupled to the output shaft of said torque convertor and an output shaft coaxially but removably coupled to said driving gear of said transfer means, an automatic transmission coaxially coupled to said driven gear of said transfer means, having a planetary mechanism and friction engaging means to provide the desired mode of operation, and an output shaft on which said driven gear of said transfer means is coaxially mounted, and a differential gear having a driving gear coupled to the output shaft of said automatic transmission for driving the motor vehicle.
Claim 3
Dependent Claim
45 words
The driving system improvement of claim 1, wherein the output shaft of said automatic transmission is positioned at the front of said vehicle and said differential gear is positioned on the opposite side of said driven gear of said transfer means from said automatic transmission.
Claim 4
Dependent Claim
60 words
The driving system improvement of claim 2, wherein said automatic transmission is positioned below said overdrive means and said planetary gear mechanism of said overdrive means has an input shaft coaxially but removably coupled to the output shaft of said torque converter, whereby said overdrive means can be easily physically removed from said driving system and said system remains operable.
Claim 5
Dependent Claim
35 words
The driving system improvement of claim 3, wherein said torque convertor is substantially horizontally aligned with said overdrive means and said differential gear and automatic transmission are positioned below said torque converter and said engine.
Claim 6
Dependent Claim
23 words
The driving system improvement of claim 1, wherein the output shaft of said automatic transmission is positioned at the rear of said vehicle.
Claim 7
Dependent Claim
60 words
The driving system improvement of claim 5, wherein said automatic transmission is positioned below said overdrive means and said planetary gear mechanism of said overdrive means has an input shaft coaxially but removably coupled to the output shaft of said torque convertor, whereby said overdrive means can be easily physically removed from said driving system, and said system remains operable.
Claim 8
Dependent Claim
46 words
The driving system improvement of claim 6, wherein said torque convertor is substantially horizontally aligned with said overdrive means, said differential gear is substantially horizontally aligned with said automatic transmission and said differential gear and automatic transmission are positioned below said torque convertor and said engine.
Claim 9
Dependent Claim
55 words
The driving system improvement of claim 1, wherein said automatic transmission is positioned below said overdrive means and said overdrive means has an input shaft coaxially but removably coupled to the output shaft of said torque convertor, whereby said overdrive means can be easily physically removed from said driving system and said system remains operable.
Claim 10
Dependent Claim
48 words
The driving system improvement of claim 8, wherein said torque convertor is substantially horizontally aligned with said overdrive means, and said differential gear is substantially horizontally aligned with said automatic transmission and said differential gear and automatic transmission are positioned below said torque convertor and said overdrive means.
Claim 11
Dependent Claim
47 words
The driving system improvement of claim 1, wherein said torque convertor is substantially horizontally aligned with said overdrive means, and said differential gear is substantially horizontally aligned with said automatic and said differential gear and automatic transmission are positioned below said torque convertor and said overdrive means.
Claim 12
Dependent Claim
24 words
The driving system improvement of claim 1, further comprising an idler gear coupling said driven gear to the driving gear of the transfer means.
Claim 13
Dependent Claim
55 words
The driving system improvement of claim 11 wherein said automatic transmission is positioned below said overdrive means and said overdrive means has an input shaft coaxially but removably coupled to the output shaft of said torque convertor, whereby said overdrive means can be easily physically removed from said driving system and said system remains operable.
Claim 14
Dependent Claim
48 words
The driving system improvement of claim 12, wherein said torque convertor is substantially horizontally aligned with said overdrive means, and said differential gear is substantially horizontally aligned with said automatic transmission and said differential gear and automatic transmission are positioned below said torque convertor and said overdrive means.
Claim 15
Dependent Claim
48 words
The driving system improvement of claim 2, wherein said torque convertor is substantially horizontally aligned with said overdrive means, and said differential gear is substantially horizontally aligned with said automatic transmission and said differential gear and automatic transmission are positioned below said torque convertor and said overdrive means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |