US3645152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed mechanism
Assignee: Individual
•
Filing: 1970-04-27
•
Granted: 1972-02-29
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Expires: 1990-04-27
Abstract
Abstract A controlled differential-gear system includes an input differential, an output differential, and an idler gear positioned between the two differentials to operate the output differential as a subtractive type when the input differential operates as an additive type. Brake means is arranged to brake one or the other side of the differentials to vary the output speed through an infinite range from maximum reverse, through zero, to maximum forward. Three arrangements of the differentials and two embodiments of the brake means are illustrated in the drawings.
Inventors
- 👤 Behzat Olcer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:31
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/44; F16H3/72; F16H3/721; F16H3/722
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
246 words
In a variable speed mechanism including a drive shaft; a driven shaft; and an input differential mechanism including planetary gear means arranged to be driven through its planetary path by the drive shaft, and first and second gears in mesh with the planetary gear means; the improvement comprising: an output differential mechanism including second planetary gear means arranged to drive the driven shaft as it moves through its planetary path, and third and fourth gears in mesh with the second planetary gear means; first means operatively connecting the first and third gears for rotation in opposite directions; second means operatively connecting the second and fourth gears for rotation in the same direction; whereby the input differential is an additive differential and the output differential is a subtractive differential; and brake means selectively operative on both of the first and second means to retard the rotation thereof and vary the speed of the drive shaft from maximum reverse speed through zero output to maximum forward speed, the brake means comprising a synchromesh gear clutch apparatus having first and second gears each in mesh with one of the first and second means and so constructed and arranged that its gears always rotate in the same direction, and the synchromesh gear clutch apparatus including a slidable gear selectively engageable with the synchromesh gear clutch apparatus first and second gears, and means for synchronizing the rotation of the slidable gear with the first and second gears prior to said engagement.
Claim 2
Dependent Claim
246 words
In a variable speed mechanism including a drive shaft; a driven shaft; and an input differential mechanism including planetary gear means arranged to be driven through its planetary path by the drive shaft, and first and second gears in mesh with the planetary gear means; the improvement comprising: an output differential mechanism including second planetary gear means arranged to drive the driven shaft as it moves through its planetary path, and third and fourth gears in mesh with the second planetary gear means; first means operatively connecting the first and third gears for rotation in opposite directions; second means operatively connecting the second and fourth gears for rotation in the same direction; whereby the input differential is an additive differential and the output differential is a subtractive differential; and brake means selectively operative on both of the first and second means to retard the rotation thereof and vary the speed of the drive shaft from maximum reverse speed through zero output to maximum forward speed, the brake means comprising a synchromesh gear clutch apparatus having first and second gears each in mesh with one of the first and second means and so constructed and arranged that its gears always rotate in the same direction, and the synchromesh gear clutch apparatus including a slidable gear selectively engageable with the synchromesh gear clutch apparatus first and second gears, and means for synchronizing the rotation of the slidable gear with the first and second gears prior to said engagement.
Claim 3
Dependent Claim
63 words
A variable speed mechanism as set forth in claim 1 wherein the differential mechanisms are arranged in side-by-side relation, the first means includes two gears directly in mesh so that the first and third gears rotate in opposite directions, and the second means includes two gears and an intermediate idler gear so that the second and fourth gears rotate in the same direction.
Claim 4
Dependent Claim
59 words
A variable speed mechanism as set forth in claim 1 wherein the drive shaft and driven shaft are coaxially arranged; the differential mechanisms are arranged in tandem; and at least one of the first and second means includes a third shaft disposed parallel to the drive and driven shafts, and gears carried on the third shaft for rotation therewith.
Claim 5
Dependent Claim
41 words
A variable speed mechanism as set forth in claim 3 wherein the other of the first and second means includes a fourth shaft disposed parallel to the drive and driven shafts, and gears carried on the fourth shaft for rotation therewith.
Claim 6
Dependent Claim
209 words
A variable speed mechanism including an input shaft; an output shaft coaxial with the input shaft; an input differential mechanism including at least one planetary gear driven through its planetary path by the input shaft, and first and second gear means in mesh with the planetary gear; an output differential mechanism including at least one other planetary gear for driving the output shaft as it moves through its planetary path, and third and fourth gear means in mesh with the other planetary gear; said differential mechanisms being arranged in tandem; first interconnecting means for interconnecting said first and third gear means for rotation in opposite directions; second interconnecting means for interconnecting said second and fourth gear means for rotation in the same direction; one of the first and second interconnecting means including a third shaft disposed parallel to the inPut and output shafts and gears carried on the third shaft for rotation therewith; one of the gear means including an idler gear to achieve the rotational difference; whereby the input differential is an additive differential and the output differential is a subtractive differential; and selectively operable means for braking at least one of the gear means to retard the rotation thereof and vary the speed of the driven shaft.
Claim 7
Dependent Claim
209 words
A variable speed mechanism including an input shaft; an output shaft coaxial with the input shaft; an input differential mechanism including at least one planetary gear driven through its planetary path by the input shaft, and first and second gear means in mesh with the planetary gear; an output differential mechanism including at least one other planetary gear for driving the output shaft as it moves through its planetary path, and third and fourth gear means in mesh with the other planetary gear; said differential mechanisms being arranged in tandem; first interconnecting means for interconnecting said first and third gear means for rotation in opposite directions; second interconnecting means for interconnecting said second and fourth gear means for rotation in the same direction; one of the first and second interconnecting means including a third shaft disposed parallel to the inPut and output shafts and gears carried on the third shaft for rotation therewith; one of the gear means including an idler gear to achieve the rotational difference; whereby the input differential is an additive differential and the output differential is a subtractive differential; and selectively operable means for braking at least one of the gear means to retard the rotation thereof and vary the speed of the driven shaft.
Claim 8
Dependent Claim
70 words
An apparatus according to claim 5 wherein the differential mechanisms are bevel gear differentials, the first and second gear means each include a bevel gear and a spur gear both rotatably mounted on the input shaft and both interconnected for simultaneous rotation, and the third and fourth gear means each include a bevel gear and a spur gear both rotatably mounted on the output shaft and interconnected for simultaneous rotation.
Claim 9
Dependent Claim
37 words
An apparatus according to claim 6 wherein the spur gears of the first and third gear means are meshed, and wherein the idler gear is meshed with the spur gears of the second and fourth gear means.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |