US3745849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crown pinion gear drive for model railroad
Assignee: Individual
•
Filing: 1971-03-29
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Granted: 1973-07-17
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Expires: 1991-03-29
Abstract
Abstract An improvement over the conventional worn gear drives for model railroads so to overcome the bucking and locking caused with worn gear drive, the device comprising a drive shaft with a pinion gear affixed thereto, the pinion gear engaging a crown gear integral and an axial alignment as one unit with a pinion gear engaging a main drive gear from which several drive gears take off power for transmitting to the wheels of a locomotive of a model railroad.
Inventors
- 👤 R Matte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:36
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/20; F16H1/203; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/1966
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A gear drive for a model locomotive comprising a pinion shaft having a pinion gear engaging a crown gear whose axis is transverse to the pinion gear, said crown gear being integral and concentric with a second pinion gear, wherein said second pinion gear engages a main drive gear engaged by several spaced smaller drive gears having axis parallel to said main drive gear, said smaller drive gears actuating several locomotive wheel units on axis transverse to said drive gears.
Claim 2
Dependent Claim
80 words
A gear drive for a model locomotive comprising a pinion shaft having a pinion gear engaging a crown gear whose axis is transverse to the pinion gear, said crown gear being integral and concentric with a second pinion gear, wherein said second pinion gear engages a main drive gear engaged by several spaced smaller drive gears having axis parallel to said main drive gear, said smaller drive gears actuating several locomotive wheel units on axis transverse to said drive gears.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |