US3886815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-speed reversible gearing
Assignee: Case Poclain Corp Ltd
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Filing: 1974-04-29
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Granted: 1975-06-03
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Expires: 1994-04-29
Abstract
Abstract A gearbox for an agricultural tractor comprises forward and reverse gearing connecting an input shaft to a co-axial intermediate shaft, dual-range gearing connecting the intermediate shaft to a layshaft, and 4-speed gearing connecting the layshaft to an output shaft and utilising those of the dualrange gears disposed on the layshaft. The foward and reverse gearing includes a synchromesh clutch, and the 4-speed gearing includes a synchromesh clutch for the highest and the next highest of its speed ratios and a dog clutch for the lowest and the next lowest of its speed ratios. The dual-range gearing includes a cluster of two gears slideable on the intermediate shaft. A power take-off shaft passes through the input and intermediate shafts which are formed as sleeves.
Inventors
- 👤 Thomas Eastwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:59
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/02; F16H3/16; F16H37/00; F16H37/02; F16H37/04; F16H37/042; F16H37/043; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19167; Y10T74/19219; Y10T74/19377; Y10T74/19386; Y10T74/19405
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
187 words
A gearbox comprising forward and reverse gearing including a synchromesh clutch and connecting an input shaft to an intermediate shaft; multi-range gearing connecting the intermediate shaft to a layshaft parallel to the intermediate shaft, said multi-range gearing comprising a cluster of two gears of mutually different pitch circle diameters slideable on splines on the intermediate shaft so that one of said gears can be brought into mesh with one gear secured on or integral with the layshaft or alternatively the other of said gears can be brought into mesh with another gear secured on or integral with the layshaft; and variable-speed gearing connecting the layshaft to an output shaft parallel to the layshaft and comprising a plurality of gears of mutually different pitch circle diameters secured on or integral with the layshaft and consisting of or including those gears on said shaft forming part of the multirange gearing gears rotatably mounted on the output shaft and each meshing constantly with one of the gears on the layshaft, and clutch means for selectively connecting one of the gears rotatably mounted on the output shaft driveably to said shaft.
Claim 2
Dependent Claim
187 words
A gearbox comprising forward and reverse gearing including a synchromesh clutch and connecting an input shaft to an intermediate shaft; multi-range gearing connecting the intermediate shaft to a layshaft parallel to the intermediate shaft, said multi-range gearing comprising a cluster of two gears of mutually different pitch circle diameters slideable on splines on the intermediate shaft so that one of said gears can be brought into mesh with one gear secured on or integral with the layshaft or alternatively the other of said gears can be brought into mesh with another gear secured on or integral with the layshaft; and variable-speed gearing connecting the layshaft to an output shaft parallel to the layshaft and comprising a plurality of gears of mutually different pitch circle diameters secured on or integral with the layshaft and consisting of or including those gears on said shaft forming part of the multirange gearing gears rotatably mounted on the output shaft and each meshing constantly with one of the gears on the layshaft, and clutch means for selectively connecting one of the gears rotatably mounted on the output shaft driveably to said shaft.
Claim 3
Dependent Claim
187 words
A gearbox comprising forward and reverse gearing including a synchromesh clutch and connecting an input shaft to an intermediate shaft; multi-range gearing connecting the intermediate shaft to a layshaft parallel to the intermediate shaft, said multi-range gearing comprising a cluster of two gears of mutually different pitch circle diameters slideable on splines on the intermediate shaft so that one of said gears can be brought into mesh with one gear secured on or integral with the layshaft or alternatively the other of said gears can be brought into mesh with another gear secured on or integral with the layshaft; and variable-speed gearing connecting the layshaft to an output shaft parallel to the layshaft and comprising a plurality of gears of mutually different pitch circle diameters secured on or integral with the layshaft and consisting of or including those gears on said shaft forming part of the multi-range gearing gears rotatably mounted on the output shaft and each meshing constantly with one of the gears on the layshaft, and clutch means for selectively connecting one of the gears rotatably mounted on the output shaft driveably to said shaft.
Claim 4
Dependent Claim
187 words
A gearbox comprising forward and reverse gearing including a synchromesh clutch and connecting an input shaft to an intermediate shaft; multi-range gearing connecting the intermediate shaft to a layshaft parallel to the intermediate shaft, said multi-range gearing comprising a cluster of two gears of mutually different pitch circle diameters slideable on splines on the intermediate shaft so that one of said gears can be brought into mesh with one gear secured on or integral with the layshaft or alternatively the other of said gears can be brought into mesh with another gear secured on or integral with the layshaft; and variable-speed gearing connecting the layshaft to an output shaft parallel to the layshaft and comprising a plurality of gears of mutually different pitch circle diameters secured on or integral with the layshaft and consisting of or including those gears on said shaft forming part of the multi-range gearing gears rotatably mounted on the output shaft and each meshing constantly with one of the gears on the layshaft, and clutch means for selectively connecting one of the gears rotatably mounted on the output shaft driveably to said shaft.
Claim 5
Dependent Claim
113 words
A gearbox according to claim 1, wherein the input and intermediate shafts are co-axial and the forward and reverse gearing comprises a gear secured on or integral with the input shaft and meshing constantly with an idler gear which meshes constantly with one gear secured on or integral with a reverse shaft parallel to the input and intermediate shafts, and another gear also secured on or integral with the reverse shaft and meshing constantly with a gear rotatably mounted on the intermediate shaft, and the synchromesh clutch is adapted to connect the gear rotatably mounted on the intermediate shaft driveably to said shaft or to connect driveably together the input and intermediate shafts.
Claim 6
Dependent Claim
21 words
A gearbox according to claim 2, wherein the input and intermediate shafts are sleeves surrounding an independently rotatable power take-off shaft.
Claim 7
Dependent Claim
31 words
A gearbox according to claim 1 wherein the cluster comprises two separately produced gears secured together by a circlip or the like with an O-ring or the like compressed between them.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |