US3777594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-speed transmission
Assignee: Doosan Bobcat North America Inc
•
Filing: 1971-12-09
•
Granted: 1973-12-11
•
Expires: 1991-12-09
Abstract
Abstract A multi-speed transmission is disclosed having a planetary gear set wherein the sun gear is connected for rotation with an output shaft, a variable speed control shaft is connected for rotation with the planetary ring gear, and a planet gear which is in mesh with both the ring gear and the sun gear is carried by a planet carrier. A first gear is connected for rotation with the planet carrier and another gear having the same operating pitch diameter as the first is connected to rotate with the ring gear. A relatively wide coupling gear is in constant mesh with the first gear but may be moved axially into additional mesh with the other gear when these two gears are rotating at the same operating pitch diameter velocities to thereby connect the planet carrier for rotation with the control shaft. A second gear in constant mesh with a third gear that is rotated by a suitable power source is axially movable into mesh with the first gear while this first gear and the planet carrier are still connected for rotation with the control shaft via the coupling gear, this meshing movement of the second gear occurring at a time when the first gear and the second gear are rotating at substantially the same operating pitch line velocities. The second gear may also be moved axially out of mesh with the first gear while these two gears are under load.
Inventors
- 👤 B Frost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:42
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/02; F16H47/04; F16H37/00; F16H37/02; F16H37/06; F16H37/08; F16H37/0833; F16H37/084; F16H2037/088
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
138 words
A transmission comprising: a planetary means having first, second and third elements, a variable speed control shaft connected to rotate and be rotated by said first element, a variable speed control means connected with said control shaft to provide means for controllably varying the rotative speed of said control shaft, a first shaft connected to rotate and be rotated by said third element, a first gear connected for rotation with said second element, a second gear, and a third gear in constant mesh with said second gears, and means for moving said second gear into mesh with said first gear when said first gear and said second gear are rotating at substantially the same operating pitch line velocities and out of mesh with said first gear when said second gear and said first gear are rotating under load.
Claim 2
Dependent Claim
138 words
A transmission comprising: a planetary means having first, second and third elements, a variable speed control shaft connected to rotate and be rotated by said first element, a variable speed control means connected with said control shaft to provide means for controllably varying the rotative speed of said control shaft, a first shaft connected to rotate and be rotated by said third element, a first gear connected for rotation with said second element, a second gear, and a third gear in constant mesh with said second gears, and means for moving said second gear into mesh with said first gear when said first gear and said second gear are rotating at substantially the same operating pitch line velocities and out of mesh with said first gear when said second gear and said first gear are rotating under load.
Claim 3
Dependent Claim
75 words
A transmission as set forth in claim 1 and including means for connecting said control shaft to rotate said second element when said second gear is not in mesh with said first gear, said connecting means also connecting said control shaft to rotate said second element when said second gear is in mesh with said first gear and said control shaft is rotating at a selected speed relative to the speed of said second gear.
Claim 4
Dependent Claim
92 words
A transmission as set forth in claim 2 wherein said planetary means includes a ring gear as said first element, a sun gear as said third element, a planet carrier as said second element, and a planet gear carried by said planet carrier and in mesh with both said ring gear and said sun gear, said ring gear being connected for rotation with said control shaft, said first gear being connected for rotation with said planet carrier, and said first shaft being an output shaft connected for rotation with said sun gear.
Claim 5
Dependent Claim
89 words
A transmission as set forth in claim 3 wherein said planetary means includes a fourth gear connected for rotation with said ring gear, said fourth gear having substantially the same operating pitch diameter as said first gear and said connecting means including a movable coupling gear, said coupling gear being movable into and out of mesh with said fourth gear when said second gear is in mesh with said first gear and said fourth gear is rotating at substantially the same operating pitch diameter velocity as said first gear.
Claim 6
Dependent Claim
60 words
A transmission as set forth in claim 3 wherein the operating pitch circle of said second gear is tangent with the operating pitch circle of said first gear and wherein said second gear is axially movable into and out of mesh with said first gear when said second and first gears are rotating at substantially the same pitch line velocities.
Claim 7
Dependent Claim
98 words
A transmission as set forth in claim 5 wherein said planetary means includes a fourth gear connected for rotation with said ring gear, said fourth gear having substantially the same operating pitch diameter as said first gear and said connecting means including an axially movable coupling gear, said coupling gear being in constant mesh with said first gear and movable into and out of mesh with said fourth gear when said second gear is in mesh with saiD first gear and said fourth gear is rotating at substantially the same operating pitch diameter velocity as said first gear.
Claim 8
Dependent Claim
59 words
A transmission as set forth in claim 5 including a second shaft rotatable substantially parallel with said control shaft and wherein said second gear is fixedly supported upon said second shaft, said second shaft being movable along its axis while rotating to provide said means for moving said second gear into and out of mesh with said first gear.
Claim 9
Dependent Claim
70 words
A transmission as set forth in claim 2 wherein said connecting means includes a second planetary means having fourth, fifth, and sixth elements and a fifth gear connected for rotation with said fourth element, said control shaft being connected to rotate and be rotated by said fifth element, and said second gear being in mesh with said fifth gear when said control shaft is connected to rotate said second element.
Claim 10
Dependent Claim
54 words
A transmission as set forth in claim 8 wherein said second gear may be moved into and out of mesh with said first gear while said second gear is still in mesh with said fifth gear when said control shaft is rotating at a selected speed relative to the speed of said second gear.
Claim 11
Dependent Claim
193 words
A transmission as set forth in claim 9, wherein said first planetary means includes a first sun gear as said first element, a first ring gear as said third element, a first planet carrier as said second element, and a first planet gear carried by said first planet carrier and in mesh with both said first sun gear and said first ring gear, said first sun gear being connected for rotation with said control shaft, said first gear being connected for rotation with said first planet carrier, and said first shaft being connected for rotation with said second planet means, and wherein said second planetary means includes a second ring gear as said fourth element, a second sun gear, as said fifth element, a second planet carrier as said sixth element, and a second planet gear carried by said second planet carrier and in mesh with both said second ring gear and said second sun gear, said second ring gear being connected for rotation with said fifth gear, said second planet carrier being connected for rotation with said first shaft and said control shaft being connected for rotation with said second sun gear.
Claim 12
Dependent Claim
21 words
A transmission as set forth in claim 10 wherein said first and fifth gears have substantially the same operating pitch diameters.
Claim 13
Dependent Claim
99 words
A transmission as set forth in claim 11 wherein the operating pitch circle of said second gear is tangent with the operating pitch circles of said first and fifth gears and wherein said second gear is axially movable into and out of mesh with said first gear while said second gear is still in mesh with said fifth gear and also is axially movable into and out of mesh with said fifth gear while still in mesh with said first gear when said control shaft is rotating at a selected speed relative to the speed of said second gear.
Claim 14
Dependent Claim
60 words
A transmission as set forth in claim 12 and including a third shaft rotatable substantially parallel with said control shaft and wherein said second gear is fixedly supported upon said third shaft, said third shaft being movable along its axis while rotating to provide said means for moving said second gear into and out of mesh with said first gear.
Claim 15
Dependent Claim
193 words
A transmission as set forth in claim 9, wherein said first planetary means includes a first sun gear as said first element, a first ring gear as said third element, a first planet carrier as said second element, and a first planet gear carried by said first planet carrier and in mesh with both said first ring gear and said first sun gear, said first ring gear being connected for rotation with said first shaft, said first sun gear being connected for rotation with said control shaft and said first gear being connected for rotation with said planet carrier, and wherein said second planetary means includes a second ring gear as said fourth element, a second sun gear as said Fifth element, and a second planet carrier as said sixth element, and a second planet gear carried by said second planet carrier and in mesh with both said second ring gear and said second sun gear, said second ring gear being connected for rotation with said fifth gear, said second sun gear being connected for rotation with said control shaft, and said second planet carrier being connected for rotation with said first shaft.
Claim 16
Dependent Claim
21 words
A transmission as set forth in claim 14 wherein said first and fifth gears have substantially the same operating pitch diameters.
Claim 17
Dependent Claim
99 words
A transmission as set forth in claim 15 wherein the operating pitch circle of said second gear is tangent with the operating pitch circles of said first and fifth gears and wherein said second gear is axially movable into and out of mesh with said first gear while said second gear is still in mesh with said fifth gear and also is axially movable into and out of mesh with said fifth gear while still in mesh with said first gear when said control shaft is rotating at a selected speed relative to the speed of said second gear.
Claim 18
Dependent Claim
59 words
A transmission as set forth in claim 16 and including a third shaft rotatable substantially parallel with said control shaft and wherein said second gear is fixedly supported upon said third shaft, said shaft being movable along its axis while rotating to provide said means for moving said second gear into and out of mesh with said first gear.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |