US3880449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricycle
Assignee: Suzuki Motor Corp
•
Filing: 1974-07-29
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Granted: 1975-04-29
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Expires: 1994-07-29
Abstract
Abstract A tricycle of the construction having one front and two rear wheels supported by front forks and a body frame, comprising an axle frame rotatably supporting the two rear wheels at the both ends, means secured to the rear portion of the body frame for resiliently supporting the axle frame at about its center point, means secured to the rear end of the body frame for supporting a driven shaft on which a driven sprocket is fixedly mounted, and a universal joint for connecting the axle of at least one rear wheel with the driven shaft, the centerline of oscillation of the axle frame relative to the body frame being in agreement with the center of said universal joint.
Inventors
- 👤 Hiroshi Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:21
CPC Classifications
B; B62; B62M; B62M1/00; B62M1/36; B62K; B62K5/00; B62K5/02; B62K5/10; B62K2005/001
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
119 words
A tricycle of the construction having one front and two rear wheels supported by front forks and a body frame, comprising an axle frame rotatably supporting the two rear wheels at the both ends, means secured to the rear portion of the body frame for resiliently supporting the axle frame at about its center point, means secured to the rear end of the body frame for supporting a driven shaft on which a driven sprocket is fixedly mounted, and a universal joint for connecting the axle of at least one rear wheel with the driven shaft, the centerline of oscillation of the axle frame relative to the body frame being in agreement with the center of said universal joint.
Claim 2
Dependent Claim
119 words
A tricycle of the construction having one front and two rear wheels supported by front forks and a body frame, comprising an axle frame rotatably supporting the two rear wheels at the both ends, means secured to the rear portion of the body frame for resiliently supporting the axle frame at about its center point, means secured to the rear end of the body frame for supporting a driven shaft on which a driven sprocket is fixedly mounted, and a universal joint for connecting the axle of at least one rear wheel with the driven shaft, the centerline of oscillation of the axle frame relative to the body frame being in agreement with the center of said universal joint.
Claim 3
Dependent Claim
21 words
A tricycle as defined in claim 1 wherein the resilient support means is a rubber spring mechanism of the neidhart type.
Claim 4
Dependent Claim
17 words
A tricycle as defined in claim 1 wherein the resilient support means is a torsion spring mechanism.
Claim 5
Dependent Claim
17 words
A tricycle as defined in claim 1 wherein the resilient support means is a torsion rubber mechanism.
Claim 6
Dependent Claim
17 words
A tricycle as defined in claim 1 wherein the universal joint is replaced by a flexible joint.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |