US4159752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricycle
Assignee: Yamaha Motor Co Ltd
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Filing: 1977-10-13
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Granted: 1979-07-03
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Expires: 1997-10-13
Abstract
Abstract A tricycle including a front frame, front wheel provided on the front frame, a rear frame provided with two adjacent and parallel wheels coupled to the front frame such that the center of the front frame is offset to one side of the tricycle relative to the center of the rear frame. Furthermore, if the tricycle is motorized, the motor is coupled to the rear frame such that the center of gravity of the motor is offset to another side of the tricycle relative to the center of the rear frame.
Inventors
- 👤 Nobuyuki Kanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:05
CPC Classifications
B; B62; B62K; B62K5/00; B62K5/02; B62K5/023; B62K5/025; B62D; B62D61/00; B62D61/06; B62D61/08; B62K5/027; B62K5/06; B62K5/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
A tricycle comprising: a rear frame having provided thereon two rear wheels and having a central longitudinal axis; a front frame rotatably and resiliently coupled to said rear frame at a single point such that a longitudinal axis of said front frame is offset to one side of said central longitudinal axis of said rear frame; a seat coupled to said front frame; and a motor coupled to said rear frame and driving said rear wheels, said motor further being coupled to said rear frame such that a center of gravity of said motor is offset to another side of said tricycle relative to said central longitudinal axis of said rear frame whereby the stability of the tricycle is increased.
Claim 2
Dependent Claim
120 words
A tricycle comprising: a rear frame having provided thereon two rear wheels and having a central longitudinal axis; a front frame rotatably and resiliently coupled to said rear frame at a single point such that a longitudinal axis of said front frame is offset to one side of said central longitudinal axis of said rear frame; a seat coupled to said front frame; and a motor coupled to said rear frame and driving said rear wheels, said motor further being coupled to said rear frame such that a center of gravity of said motor is offset to another side of said tricycle relative to said central longitudinal axis of said rear frame whereby the stability of the tricycle is increased.
Claim 3
Dependent Claim
14 words
A tricycle according to claim 1 wherein said motor is an internal combustion engine.
Claim 4
Dependent Claim
21 words
A tricycle according to claim 2 wherein said front frame is resiliently coupled to said rear frame by a torsion bar.
Claim 5
Dependent Claim
17 words
A tricycle according to claim 1 wherein said engine drives said rear wheel on said other side.
Claim 6
Dependent Claim
37 words
A tricycle according to claim 4 wherein said motor is provided on the rear frame so as to be movable in a vertical direction and the rear wheel on said other side is held by said motor.
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) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |