US3869939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydromechanical transmission
Assignee: Aisin Corp
•
Filing: 1973-04-27
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Granted: 1975-03-11
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Expires: 1993-04-27
Abstract
Abstract A hydromechanical transmission having an input rotary shaft, an output rotary shaft, two differential gear sets interposed between the input and output shafts, and hydrostatic pump-motors interconnected through means of a closed hydrostatic circuit and clutch means associated with the gear sets, whereby when the input shaft, the output shaft, and one of the pump-motors is connected to one of the gear sets while the other pump-motor is simultaneously connected to the output shaft an input split-type hydromechanical transmission is formed, while when the input shaft, output shaft, and one of the pump-motors is connected to the other one of the gear sets and the other pump-motor is simultaneously connected to the input shaft an output split-type hydromechanical transmission is formed, the latter transmission having a higher reference speed ratio than the former. Additional gearing may further be provided whereby the reference speed ratios may be varied to predetermined desired values.
Inventors
- 👤 Takayuki Miyao
- 👤 Hiroaki Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:12
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/02; F16H47/04; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H2037/0866; F16H2037/088; F16H37/10; F16H2037/101
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
287 words
A hydromechanical transmission comprising: an input rotary shaft; an output rotary shaft; a pair of variable volume hydrostatic pump-motors being interconnected with each other through means of a closed hydrostatic circuit; a first differential gear set having a first gear element connected with said input rotary shaft, a second gear element, and a third gear element connected with said first and second gear elements thereof; a second differential gear set having a first gear element connected with said output rotary shaft, a second gear element, and a third gear element connected with said first and second gear elements thereof and to said third gear element of said first differential gear set; A first gear connected with said second gear element of said first differential gear set for rotation therewith; a second gear mounted on the rotary shaft of one of said hydrostatic pump motors and connected with said first gear for rotation therewith; a third gear mounted on said rotary shaft of said one of said hydrostatic pump motors; a fourth gear rotatable with said third gear; first clutch means between said fourth gear and said input rotary shaft for coupling said first gear element and said second gear element of said first differential gear set for simultaneous rotation; a fifth gear mounted on the rotary shaft of the other of said hydrostatic pump motors; a sixth gear connected between said fifth gear and said second gear element of said second differential gear set for rotation therewith; and second clutch means between said second gear element of said second differential gear set and said output rotary shaft for coupling said first gear element and said second gear element of said second differential gear set for simultaneous rotation.
Claim 2
Dependent Claim
287 words
A hydromechanical transmission comprising: an input rotary shaft; an output rotary shaft; a pair of variable volume hydrostatic pump-motors being interconnected with each other through means of a closed hydrostatic circuit; a first differential gear set having a first gear element connected with said input rotary shaft, a second gear element, and a third gear element connected with said first and second gear elements thereof; a second differential gear set having a first gear element connected with said output rotary shaft, a second gear element, and a third gear element connected with said first and second gear elements thereof and to said third gear element of said first differential gear set; A first gear connected with said second gear element of said first differential gear set for rotation therewith; a second gear mounted on the rotary shaft of one of said hydrostatic pump motors and connected with said first gear for rotation therewith; a third gear mounted on said rotary shaft of said one of said hydrostatic pump motors; a fourth gear rotatable with said third gear; first clutch means between said fourth gear and said input rotary shaft for coupling said first gear element and said second gear element of said first differential gear set for simultaneous rotation; a fifth gear mounted on the rotary shaft of the other of said hydrostatic pump motors; a sixth gear connected between said fifth gear and said second gear element of said second differential gear set for rotation therewith; and second clutch means between said second gear element of said second differential gear set and said output rotary shaft for coupling said first gear element and said second gear element of said second differential gear set for simultaneous rotation.
Claim 3
Dependent Claim
287 words
A hydromechanical transmission comprising: an input rotary shaft; an output rotary shaft; a pair of variable volume hydrostatic pump-motors being interconnected with each other through means of a closed hydrostatic circuit; a first differential gear set having a first gear element connected with said input rotary shaft, a second gear element, and a third gear element connected with said first and second gear elements thereof; a second differential gear set having a first gear element connected with said output rotary shaft, a second gear element, and a third gear element connected with said first and second gear elements thereof and to said third gear element of said first differential gear set; A first gear connected with said second gear element of said first differential gear set for rotation therewith; a second gear mounted on the rotary shaft of one of said hydrostatic pump motors and connected with said first gear for rotation therewith; a third gear mounted on said rotary shaft of said one of said hydrostatic pump motors; a fourth gear rotatable with said third gear; first clutch means between said fourth gear and said input rotary shaft for coupling said first gear element and said second gear element of said first differential gear set for simultaneous rotation; a fifth gear mounted on the rotary shaft of the other of said hydrostatic pump motors; a sixth gear connected between said fifth gear and said second gear element of said second differential gear set for rotation therewith; and second clutch means between said second gear element of said second differential gear set and said output rotary shaft for coupling said first gear element and said second gear element of said second differential gear set for simultaneous rotation.
Claim 4
Dependent Claim
287 words
A hydromechanical transmission comprising: an input rotary shaft; an output rotary shaft; a pair of variable volume hydrostatic pump-motors being interconnected with each other through means of a closed hydrostatic circuit; a first differential gear set having a first gear element connected with said input rotary shaft, a second gear element, and a third gear element connected with said first and second gear elements thereof; a second differential gear set having a first gear element connected with said output rotary shaft, a second gear element, and a third gear element connected with said first and second gear elements thereof and to said third gear element of said first differential gear set; A first gear connected with said second gear element of said first differential gear set for rotation therewith; a second gear mounted on the rotary shaft of one of said hydrostatic pump motors and connected with said first gear for rotation therewith; a third gear mounted on said rotary shaft of said one of said hydrostatic pump motors; a fourth gear rotatable with said third gear; first clutch means between said fourth gear and said input rotary shaft for coupling said first gear element and said second gear element of said first differential gear set for simultaneous rotation; a fifth gear mounted on the rotary shaft of the other of said hydrostatic pump motors; a sixth gear connected between said fifth gear and said second gear element of said second differential gear set for rotation therewith; and second clutch means between said second gear element of said second differential gear set and said output rotary shaft for coupling said first gear element and said second gear element of said second differential gear set for simultaneous rotation.
Claim 5
Dependent Claim
226 words
A hydromechanical transmission comprising: an input rotary shaft; an output rotary shaft; a pair of variable volume hydrostatic pump-motors being interconnected with each other through means of a closed hydrostatic circuit; a first differential gear set having a first gear element connected with said input rotary shaft, a second gear element connected with one of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof; a second differential gear set having a first gear element connected with said output rotary shaft, a second gear element connected with the other of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof; an intermediate rotary shaft supporting said third gear element of said first differential gear set on one end and said third gear element of said second differential gear set on the other end thereof; a first gear on said intermediate rotary shaft; a second gear connected with said first gear for rotation therewith; first clutch means between said second gear and said input rotary shaft for coupling said first gear element and said third gear element of said first differential gear set; and second clutch means between said second gear and said output rotary shaft for coupling said first gear element and said third gear element of said second differential gear set.
Claim 6
Dependent Claim
226 words
A hydromechanical transmission comprising: an input rotary shaft; an output rotary shaft; a pair of variable volume hydrostatic pump-motors being interconnected with each other through means of a closed hydrostatic circuit; a first differential gear set having a first gear element connected with said input rotary shaft, a second gear element connected with one of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof; a second differential gear set having a first gear element connected with said output rotary shaft, a second gear element connected with the other of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof; an intermediate rotary shaft supporting said third gear element of said first differential gear set on one end and said third gear element of said second differential gear set on the other end thereof; a first gear on said intermediate rotary shaft; a second gear connected with said first gear for rotation therewith; first clutch means between said second gear and said input rotary shaft for coupling said first gear element and said third gear element of said first differential gear set; and second clutch means between said second gear and said output rotary shaft for coupling said first gear element and said third gear element of said second differential gear set.
Claim 7
Dependent Claim
226 words
A hydromechanical transmission comprising: an input rotary shaft; an output rotary shaft; a pair of variable volume hydrostatic pump-motors being interconnected with each other through means of a closed hydrostatic circuit; a first differential gear set having a first gear element connected with said input rotary shaft, a second gear element connected with one of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof; a second differential gear set having a first gear element connected with said output rotary shaft, a second gear element connected with the other of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof; an intermediate rotary shaft supporting said third gear element of said first differential gear set on one end and said third gear element of said second differential gear set on the other end thereof; a first gear on said intermediate rotary shaft; a second gear connected with said first gear for rotation therewith; first clutch means between said second gear and said input rotary shaft for coupling said first gear element and said third gear element of said first differential gear set; and second clutch means between said second gear and said output rotary shaft for coupling said first gear element and said third gear element of said second differential gear set.
Claim 8
Dependent Claim
226 words
A hydromechanical transmission comprising: an input rotary shaft; an output rotary shaft; a pair of variable volume hydrostatic pump-motors being interconnected with each other through means of a closed hydrostatic circuit; a first differential gear set having a first gear element connected with said input rotary shaft, a second gear element connected with one of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof; a second differential gear set having a first gear element connected with said output rotary shaft, a second gear element connected with the other of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof; an intermediate rotary shaft supporting said third gear element of said first differential gear set on one end and said third gear element of said second differential gear set on the other end thereof; a first gear on said intermediate rotary shaft; a second gear connected with said first gear for rotation therewith; first clutch means between said second gear and said input rotary shaft for coupling said first gear element and said third gear element of said first differential gear set; and second clutch means between said second gear and said output rotary shaft for coupling said first gear element and said third gear element of said second differential gear set.
Claim 9
Dependent Claim
208 words
A hydromechanical transmission comprising: an input rotary shaft; an output rotary shaft; a pair of variable volume hydrostatic pump-motors being interconnected with each other through means of a closed hydraulic circuit; a first differential gear set having a first gear element connected with said input rotary shaft, a second gear element connected with one of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof; a second differential gear set having a first gear element connected with said output rotary shaft, a second gear element connected with said one of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof and to said input rotary shaft; a first gear on said input rotary shaft; first clutch means for coupling said first gear to the other of said hydrostatic pump-motors; a second gear on said output rotary shaft; second clutch means for coupling said second gear to said other of said hydrostatic pump-motors; third clutch means between said second gear element of said first differential gear set and said one of said hydrostatic pump-motors; and fourth clutch means between said second gear element of said second differential gear and said one of said hydrostatic pumpmotors.
Claim 10
Dependent Claim
208 words
A hydromechanical transmission comprising: an input rotary shaft; an output rotary shaft; a pair of variable volume hydrostatic pump-motors being interconnected with each other through means of a closed hydraulic circuit; a first differential gear set having a first gear element connected with said input rotary shaft, a second gear element connected with one of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof; a second differential gear set having a first gear element connected with said output rotary shaft, a second gear element connected with said one of said hydrostatic pump-motors, and a third gear element connected with said first and second gear elements thereof and to said input rotary shaft; a first gear on said input rotary shaft; first clutch means for coupling said first gear to the other of said hydrostatic pump-motors; a second gear on said output rotary shaft; second clutch means for coupling said second gear to said other of said hydrostatic pump-motors; third clutch means between said second gear element of said first differential gear set and said one of said hydrostatic pump-motors; and fourth clutch means between said second gear element of said second differential gear and said one of said hydrostatic pumpmotors.
References Cited (Backward Citations)
US3373635A
Cited
US3364790A
Cited
US3398605A
Cited
US3455183A
Cited
US3470769A
Cited
US3492891A
Cited
US3722324A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |