Patent US2749336A successfully refreshed from Google Patents.
Patent US4197672A successfully refreshed from Google Patents.
US4197672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Model racing car
Assignee: Mabuchi Motor Co Ltd
•
Filing: 1978-11-22
•
Granted: 1980-04-15
•
Expires: 1998-11-22
Abstract
Abstract A model racing car having front wheels, rear wheels, drive motors and a radio control receiver and of the front drive type that is adapted to control a large steering angle of the front wheels by means of the output of the radio control receiver, wherein a plurality of the drive motors with reduction gear devices, mounted on each of the front wheels for driving the front wheels independently are caused to rotate in an interlocking fashion as a block by the output of the radio control receiver, whereby the steering angle of the front wheels is controlled.
Inventors
- 👤 Kenichi Mabuchi
- 👤 Tatuo Katunuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:30
CPC Classifications
A; A63; A63H; A63H17/00; A63H17/26; A63H17/36
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A model racing car having front wheels, rear wheels, drive motors and a radio control receiver, the drive motors driving the front wheels and the steering angle of the front wheels being controlled by the output of the radio control receiver, characterized in that the drive motors, together with reduction gear devices, are mounted independently on each of the front wheels, the steering angle being controlled by rotating in an interlocking fashion a plurality of front wheel blocks by means of the output of the radio control receiver, each of the blocks comprising the front wheel, the reduction gear device and the drive motor as one block.
Claim 2
Dependent Claim
107 words
A model racing car having front wheels, rear wheels, drive motors and a radio control receiver, the drive motors driving the front wheels and the steering angle of the front wheels being controlled by the output of the radio control receiver, characterized in that the drive motors, together with reduction gear devices, are mounted independently on each of the front wheels, the steering angle being controlled by rotating in an interlocking fashion a plurality of front wheel blocks by means of the output of the radio control receiver, each of the blocks comprising the front wheel, the reduction gear device and the drive motor as one block.
Claim 3
Dependent Claim
49 words
The model racing car as set forth in claim 1 characterized in that king pins are provided on each of the front wheel blocks and steering arms are coupled to the chassis, each of the front wheel blocks being rotatably supported about the king pins by said steering arms.
Claim 4
Dependent Claim
55 words
The model racing car as set forth in claim 1 characterized in that the steering angles of the wheels in each of the front wheel blocks are controlled simultaneously and at the same angle by means of a rotating mechanism fixed to the king pins and controlled by the output of the radio control receiver.
Claim 5
Dependent Claim
47 words
The model racing car as set forth in claim 1 characterized in that the front wheel block is constructed so that the axle shaft of the front wheel is in alignment with the rotating axis of the drive motor with the reduction gear device interposed in between.
Claim 6
Dependent Claim
126 words
The model racing car as set forth in claim 1 characterized in that the front wheel block is constructed so that a pinion gear is fixed to the rotating shaft of the drive motor, a gear box supporting an intermediate gear which is in mesh with the pinion gear and exposed to the outside of the gear box in fixed relation to the drive motor, a wheel shaft is integrally formed with the gear box on the outer surface of the end face of the gear box in axial alignment with the rotating shaft of the drive motor, and a wheel having gear teeth formed on the internal circumference of the wheel and in mesh with the intermediate gear is rotatably fitted to the wheel shaft.
References Cited (Backward Citations)
FR996620A
Cited
US2691946A
Cited
US3376827A
Cited
US3590526A
Cited
US3757464A
Cited
GB1525823A
Cited
DE2809250A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |