US3286541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed gearboxes
Assignee: David Brown Tractors Ltd
•
Filing: 1963-11-27
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Granted: 1966-11-22
•
Expires: 1983-11-27
Abstract
No abstract record available.
Inventors
- 👤 Dearnley Kenneth
- 👤 Eastwood Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:19
CPC Classifications
F; F16; F16H; F16H47/00; F16H47/02; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19037; Y10T74/19219; Y10T74/19284
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A VARIABLE SPEED GEARBOX COMPRISING A MULTI-RATIO TOOTHED GEAR POWER TRANSMISSION MECHANISM FOR TRANSMISSION MECHANISM FOR TRANSMITTING TORQUE BETWEEN INPUT AND OUTPUT SHAFTS, SAID TRANSMISSION HAVING TWO ROTATING PARTS AND MEANS FOR MECHANICALLY CONNECTING SAID PARTS TOGETHER WHEN THEIR RELATIVE SPEEDS HYDROSTATIC BROUGHT INTO A REQUIRED RATIO, A VARIABLE SPEED HYDROSTATIC POWER TRANSMISSION MECHANISM DRIVABLY CONNECTED BETWEEN SAID TWO ROTATING PARTS OF SAID TOOTHED GEAR POWER TRANSMISSION MECHANISM WHICH ARE TO BE MECHANICALLY CONNECTED TOGETHER, MEANS FOR ADJUSTING THE SPEED RATIO OF SAID HYDROSTATIC POWER TRANSMISSION MECHANISM TO THE SAME AS THAT REQUIRED BETWEEN SAID ROTATING PARTS, AND MECHANICAL INERTIA LOCK MEANS FOR BAULKING THE MECHANICAL
Claim 2
Dependent Claim
106 words
A VARIABLE SPEED GEARBOX COMPRISING A MULTI-RATIO TOOTHED GEAR POWER TRANSMISSION MECHANISM FOR TRANSMISSION MECHANISM FOR TRANSMITTING TORQUE BETWEEN INPUT AND OUTPUT SHAFTS, SAID TRANSMISSION HAVING TWO ROTATING PARTS AND MEANS FOR MECHANICALLY CONNECTING SAID PARTS TOGETHER WHEN THEIR RELATIVE SPEEDS HYDROSTATIC BROUGHT INTO A REQUIRED RATIO, A VARIABLE SPEED HYDROSTATIC POWER TRANSMISSION MECHANISM DRIVABLY CONNECTED BETWEEN SAID TWO ROTATING PARTS OF SAID TOOTHED GEAR POWER TRANSMISSION MECHANISM WHICH ARE TO BE MECHANICALLY CONNECTED TOGETHER, MEANS FOR ADJUSTING THE SPEED RATIO OF SAID HYDROSTATIC POWER TRANSMISSION MECHANISM TO THE SAME AS THAT REQUIRED BETWEEN SAID ROTATING PARTS, AND MECHANICAL INERTIA LOCK MEANS FOR BAULKING THE MECHANICAL
References Cited (Backward Citations)
DE457880C
Cited
US3095757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |