US3665788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydromechanical storing transmission
Assignee: Danfoss Power Solutions Inc
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Filing: 1970-08-19
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Granted: 1972-05-30
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Expires: 1990-08-19
Abstract
Abstract A regenerative transmission including split parallel power paths, one being mechanical and the other having an infinitely variable hydrostatic transmission with the power paths being combined by a differential at the transmission output that is constructed to produce a zero output when the hydrostatic drive rotates the differential elements in a subtracting or negative direction at a predetermined speed. The transmission input and the output from the hydrostatic drive are connected through a summing differential to drive a flywheel that stores energy under static conditions and regenerates energy by (1) providing assist torque to the output shaft during acceleration, and (2) absorbing energy normally delivered at the output shaft during deceleration to assist in transmission braking.
Inventors
- 👤 Bengt E Nyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:58
CPC Classifications
B; B60; B60K; B60K6/00; B60K6/08; B60K6/10; B60K6/105; B60K6/12; F; F16; F16H; F16H47/00; F16H47/02; F16H47/04; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H2037/088; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2117
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
92 words
A regenerative transmission, comprising: an infinitely variable transmission, input shaft means adapted to be driven by a prime mover and connected to drive said infinitely variable transmission, output shaft means connected to be driven by said infinitely variable transmission, and energy storage means for adding torque to said output shaft means responsive to acceleration of the output shaft means by the variable speed transmission, said energy storage means being drivingly connected to the transmission so that it is driven at a speed inversely related to the speed of the output shaft means.
Claim 2
Dependent Claim
92 words
A regenerative transmission, comprising: an infinitely variable transmission, input shaft means adapted to be driven by a prime mover and connected to drive said infinitely variable transmission, output shaft means connected to be driven by said infinitely variable transmission, and energy storage means for adding torque to said output shaft means responsive to acceleration of the output shaft means by the variable speed transmission, said energy storage means being drivingly connected to the transmission so that it is driven at a speed inversely related to the speed of the output shaft means.
Claim 3
Dependent Claim
94 words
A regenerative transmission, comprising: an infinitely variable transmission, input shaft adapted to be driven by a prime mover and connected to drive said infinitely variable transmission, output shaft means connected to be driven by said infinitely variable transmission, and energy storage means for reducing the torque of the output shaft means responsive to deceleration of the output shafT means by said infinitely variable transmission, said energy storage means being drivingly connected to the energy storage means so that it is rotated at a speed inversely related to the speed of the output shaft means.
Claim 4
Dependent Claim
94 words
A regenerative transmission, comprising: an infinitely variable transmission, input shaft adapted to be driven by a prime mover and connected to drive said infinitely variable transmission, output shaft means connected to be driven by said infinitely variable transmission, and energy storage means for reducing the torque of the output shaft means responsive to deceleration of the output shafT means by said infinitely variable transmission, said energy storage means being drivingly connected to the energy storage means so that it is rotated at a speed inversely related to the speed of the output shaft means.
Claim 5
Dependent Claim
77 words
A regenerative transmission, comprising: an infinitely variable transmission, input shaft means adapted to be driven by a prime mover and connected to drive said infinitely variable transmission, output shaft means connected to be driven by said infinitely variable transmission, and energy storage means for braking the output shaft means responsive to deceleration of the output shaft means by said infinitely variable transmission, said energy storage means being connected to accelerate upon deceleration of the output shaft means.
Claim 6
Dependent Claim
77 words
A regenerative transmission, comprising: an infinitely variable transmission, input shaft means adapted to be driven by a prime mover and connected to drive said infinitely variable transmission, output shaft means connected to be driven by said infinitely variable transmission, and energy storage means for braking the output shaft means responsive to deceleration of the output shaft means by said infinitely variable transmission, said energy storage means being connected to accelerate upon deceleration of the output shaft means.
Claim 7
Dependent Claim
33 words
A regenerative transmission, as defined in claim 1, wherein said energy storage means includes a flywheel, and means for driving the flywheel at maximum speed when the infinitely variable transmission is in neutral.
Claim 8
Dependent Claim
74 words
A regenerative transmission, as defined in claim 4, wherein said energy storage means includes a flywheel, and means for driving the flywheel at maximum speed when the infinitely variable transmission is in neutral, including a differential for driving said flywheel, said differential including a first input gear drivingly connected to the input shaft means, a second input gear drivingly connected to the infinitely variable transmission, and a third gear drivingly connected to the flywheel.
Claim 9
Dependent Claim
33 words
A regenerative transmission, as defined in claim 5, wherein said differential is arranged to decrease the speed of the third gear in response to an increase in speed of the output shaft means.
Claim 10
Dependent Claim
33 words
A regenerative transmission, as defined in claim 5, wherein said differential is constructed to increase the speed of the third gear in response to a decrease in speed of the output shaft means.
Claim 11
Dependent Claim
139 words
A regenerative transmission, comprising: an output shaft, a variable speed hydraulic transmission driven by said input shaft, means for varying the speed ratio of said hydraulic transmission, a first differential including a first gear drivingly connected to said input shaft, a second gear dirvingly connected to said variable speed hydraulic transmission, and a third gear driven by the interaction of said first and second gears, an output shaft, said third gear being drivingly connected to said output shaft, an energy storage device for assisting acceleration and deceleration of said output shaft including a rotary flywheel, a second differential including a first gear drivingly connected to said input shaft, a second gear drivingly connected to said variable speed hydraulic transmission, and a third gear driven by the interaction of said first and second gears and drivingly connected to said flywheel.
Claim 12
Dependent Claim
139 words
A regenerative transmission, comprising: an output shaft, a variable speed hydraulic transmission driven by said input shaft, means for varying the speed ratio of said hydraulic transmission, a first differential including a first gear drivingly connected to said input shaft, a second gear dirvingly connected to said variable speed hydraulic transmission, and a third gear driven by the interaction of said first and second gears, an output shaft, said third gear being drivingly connected to said output shaft, an energy storage device for assisting acceleration and deceleration of said output shaft including a rotary flywheel, a second differential including a first gear drivingly connected to said input shaft, a second gear drivingly connected to said variable speed hydraulic transmission, and a third gear driven by the interaction of said first and second gears and drivingly connected to said flywheel.
Claim 13
Dependent Claim
87 words
A regenerative transmission as defined in claim 8, wherein said second differential is constructed to sum the speed of the first and second gears so that upon an increase in speed of said first gear the third gear speed will tend to decrease, said hydraulic transmission being constructed to subtract speed from said first differential to effect zero output shaft rotation at a predetermined displacement, said second differential being constructed to rotate the flywheel at a maximum speed when the hydraulic transmission is at said predetermined ratio.
Claim 14
Dependent Claim
83 words
A regenerative transmission as defined in claim 8, wherein said first gear of the first differential is a sun gear, said second gear of said first differential being a planetary gear device, said third gear of said first differential being a ring gear, said first gear of said second differential being a planetary gear device, said second gear of said second differential being a ring gear, and said third gear of said second differential being a sun gear adapted to drive the flywheel.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |