US3774460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact transmission structure
Assignee: Deere and Co
•
Filing: 1972-06-09
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Granted: 1973-11-27
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Expires: 1992-06-09
Abstract
Abstract The drive train of a sixteen-speed transmission commences at the end of an engine crankshaft with a traction input drive shaft, which is coaxially received in a hollow PTO input drive shaft, and a dual clutch assembly operable for selectively connecting one or the other or both of the drive shafts for rotation with the crank-shaft. The PTO input drive shaft terminates ahead of a two-speed planetary transmission section which has input gearing connected to an end of the traction input drive shaft and output gearing connected to a planetary output shaft. The PTO input drive shaft is connected for driving a PTO shaft which extends parallel thereto. An eight-speed transmission section includes parallel input, output and countershafts, the input shaft being axially aligned with and connected to the planetary output shaft. The transmission drive train is encased in an elongated housing having three spaced support walls which support the transmission shafts and planetary transmission section and which support and form a portion of control means for certain elements of the transmission.
Inventors
- 👤 E Browning
- 👤 L Madson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:05
CPC Classifications
F; F16; F16H; F16H37/00; F16H37/02; F16H37/04; F16H37/042; F16H37/046; B; B60; B60K; B60K17/00; B60K17/28; F16H57/00; F16H57/02; B60K23/00; B60K23/02; F16H2057/02039; F16H2057/02043; F16H2057/02056; F16H2057/02086; F16H3/00; F16H3/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
359 words
A compact transmission for a tractor, or the like, comprising: an elongate hollow housing having a generally cylindrical portion at one end defining a clutch housing; first, second and third support walls being integral with and extending transversely to the elongate housing at spaced locations respectively arranged serially from a location spaced from said one end of the elongate housing; said first support wall defining an inner end wall of the clutch housing; a hollow PTO input drive shaft extending within and coaxially to said clutch housing and having one end extending through and rotatably supported in said first support wall; a trAction input drive shaft extending coaxially through said PTO input drive shaft and having an end rotatably supported in said second support wall; a PTO shaft extending parallel to said PTO input drive shaft and having one end rotatably mounted in said first support wall, the PTO shaft extending through and being rotatably supported in said third support wall; a dual-clutch assembly being located within said clutch housing and including PTO and traction clutch friction elements which are selectively actuatable for causing one or the other or both of said input drive shafts to be driven; PTO drive and driven gears being in constant mesh and respectively fixed for rotation with said PTO input drive and PTO shafts at respective locations adjacent that side of the first support wall which is remote from the dual-clutch assembly; said traction input drive shaft being separated at a location between said first and second support walls thus forming two shaft sections; a two-speed planetary transmission section located between said first and second support walls and having drive means connecting said two shaft sections; said planetary transmission section including a housing portion at one end fixed to said first support wall and located adjacent said PTO drive gear; a multispeed transmission section including parallel input, counter and output shafts and being located between and each having their opposite end rotatably mounted in said second and third support walls; and said input shaft of the multi-speed transmission section being fixed to and arranged in axial alignment with the traction input drive shaft.
Claim 2
Dependent Claim
359 words
A compact transmission for a tractor, or the like, comprising: an elongate hollow housing having a generally cylindrical portion at one end defining a clutch housing; first, second and third support walls being integral with and extending transversely to the elongate housing at spaced locations respectively arranged serially from a location spaced from said one end of the elongate housing; said first support wall defining an inner end wall of the clutch housing; a hollow PTO input drive shaft extending within and coaxially to said clutch housing and having one end extending through and rotatably supported in said first support wall; a trAction input drive shaft extending coaxially through said PTO input drive shaft and having an end rotatably supported in said second support wall; a PTO shaft extending parallel to said PTO input drive shaft and having one end rotatably mounted in said first support wall, the PTO shaft extending through and being rotatably supported in said third support wall; a dual-clutch assembly being located within said clutch housing and including PTO and traction clutch friction elements which are selectively actuatable for causing one or the other or both of said input drive shafts to be driven; PTO drive and driven gears being in constant mesh and respectively fixed for rotation with said PTO input drive and PTO shafts at respective locations adjacent that side of the first support wall which is remote from the dual-clutch assembly; said traction input drive shaft being separated at a location between said first and second support walls thus forming two shaft sections; a two-speed planetary transmission section located between said first and second support walls and having drive means connecting said two shaft sections; said planetary transmission section including a housing portion at one end fixed to said first support wall and located adjacent said PTO drive gear; a multispeed transmission section including parallel input, counter and output shafts and being located between and each having their opposite end rotatably mounted in said second and third support walls; and said input shaft of the multi-speed transmission section being fixed to and arranged in axial alignment with the traction input drive shaft.
Claim 3
Dependent Claim
42 words
The transmission defined in claim 1 and further including PTO and traction clutch control means for actuating the friction elements of the PTO and traction clutch assembly; said control means being carried by and including a portion of said first support wall.
Claim 4
Dependent Claim
37 words
The transmission defined in claim 1 and further including brake means for selectively retarding the speed of said driven PTO gear and said brake means being carried by and including a portion of said first support wall.
Claim 5
Dependent Claim
53 words
The transmission defined in claim 1 wherein the dual-clutch assembly is a wet clutch requiring lubrication; and further including a lubrication fluid control valve means for controlling the flow of fluid to the dual-clutch assembly and said lubrication fluid control valve being carried by and including a portion of said first support wall.
Claim 6
Dependent Claim
59 words
The transmission defined in claim 1 wherein the two-speed planetary section includes a hydraulic brake actuating piston, a hydraulic clutch actuating piston and a shiftable control valve for controlling the flow of fluid to and from the pistons; said pistons and control valve being located in and including a portion of said housing portion of the planetary transmission section.
Claim 7
Dependent Claim
37 words
The transmission defined in claim 2 and further including brake means for selectively retarding the speed of said driven PTO gear and said brake means being carried by and including a portion of said first support wall.
Claim 8
Dependent Claim
53 words
The transmission defined in claim 6 wherein the dual-clutch assembly is a wet clutch requiring lubrication; and further including a lubrication fluid control valve means for controlling the flow of fluid to the dual-clutch assembly and said lubrication fluid control valve being carried by and including a portion of said first support wall.
Claim 9
Dependent Claim
59 words
The transmission defined in claim 7 wherein the two-speed planetary section includes a hydraulic brake actuating piston, a hydraulic clutch actuating piston and a shiftable control valve for controlling the flow of fluid to and from the pistons; said pistons and control valve being located in and including a portion of said housing portion of the planetary transmission section.
Claim 10
Dependent Claim
226 words
A compact transmission for a tractor, or the like, comprising: a hollow PTO input drive shaft; a traction input drive shaft extending coaxially through said PTO input drive shaft; a PTO shaft extendIng parallel to said PTO input drive shaft and overlapping one end thereof and one end of said traction input drive shaft; a drive gear fixed to said one end of the PTO input drive shaft for rotation therewith; a driven gear fixed to said PTO shaft and meshed with said drive gear; said one end of the traction input drive shaft being spaced from the drive gear; a two-speed planetary transmission section having a housing positioned adjacent said drive gear; said housing defining an opening receiving said traction input drive shaft; an input sun gear being fixed to said one end of said traction input drive shaft; a planetary output shaft axially aligned with said traction input drive shaft and having one end in abutment with said one end thereof; an output sun gear being fixed to said one end of the planetary output shaft; planetary carrier and planet gear means providing a driving connection between said input and output sun gears; an eight-speed transmission section having parallel input, output and countershafts; the input of said eight-speed transmission section being in axial alignment with and fixed for rotation with said planetary output shaft.
Claim 11
Dependent Claim
226 words
A compact transmission for a tractor, or the like, comprising: a hollow PTO input drive shaft; a traction input drive shaft extending coaxially through said PTO input drive shaft; a PTO shaft extendIng parallel to said PTO input drive shaft and overlapping one end thereof and one end of said traction input drive shaft; a drive gear fixed to said one end of the PTO input drive shaft for rotation therewith; a driven gear fixed to said PTO shaft and meshed with said drive gear; said one end of the traction input drive shaft being spaced from the drive gear; a two-speed planetary transmission section having a housing positioned adjacent said drive gear; said housing defining an opening receiving said traction input drive shaft; an input sun gear being fixed to said one end of said traction input drive shaft; a planetary output shaft axially aligned with said traction input drive shaft and having one end in abutment with said one end thereof; an output sun gear being fixed to said one end of the planetary output shaft; planetary carrier and planet gear means providing a driving connection between said input and output sun gears; an eight-speed transmission section having parallel input, output and countershafts; the input of said eight-speed transmission section being in axial alignment with and fixed for rotation with said planetary output shaft.
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |