Patent US3592487A successfully refreshed from Google Patents.
US3592487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricycle chassis
Assignee: GOBBY Mfg Inc
•
Filing: 1969-07-25
•
Granted: 1971-07-13
•
Expires: 1989-07-25
Abstract
Abstract A tricycle chassis arranged for ease of operation of the tricycle, quick and easy changing of the rear tires, and having a novel basket-and-rear-fender assembly that can be quickly attached and removed from the chassis.
Inventors
- 👤 Richard C Mansperger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:19
CPC Classifications
B; B62; B62K; B62K5/00; B62K5/02; B62J; B62J7/00; B62J7/02; B62J7/04; B62J15/00; B62J15/02; B62K5/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
250 words
A three-wheel tricycle chassis including: A. a front-wheel steering fork and handlebar assembly, B. a steering bushing rotatably supporting the steering fork, C. a frame comprising a single tubular member having, D. a front end portion fixed to the lower end of the rear portion of the steering bushing, E. a rearwardly and downwardly curved portion extending from the front end portion of the frame terminating in a sharp turn to a substantially rearwardly projecting portion, F. and a substantially horizontally disposed rear portion of the frame fixed at its front end to the rearwardly projecting portion of the sharp turn, G. a rear axle assembly fixed to the rear end of the rear portion of the frame, H. said rear axle assembly comprising a left-hand tubular member having the front portion of its inner end fixed to the rear end of the frame, I. a right-hand tubular member In axial alignment with and axially spaced from the left-hand tubular member forming a sprocket slot between the inner ends thereof, J. and an upstanding strut fixed to the top portions of each tubular member to maintain their alignment, K. an idler axle journaled in the right-hand tubular member, L. a drive axle journaled in the left-hand tubular member, M. a sprocket fixed on the inner end of the drive axle located within the sprocket slot, N. a pedal crank on the rearwardly extending portion of the frame having a sprocket fixed thereto, O. and a drive chain interconnecting the sprockets.
Claim 2
Dependent Claim
250 words
A three-wheel tricycle chassis including: A. a front-wheel steering fork and handlebar assembly, B. a steering bushing rotatably supporting the steering fork, C. a frame comprising a single tubular member having, D. a front end portion fixed to the lower end of the rear portion of the steering bushing, E. a rearwardly and downwardly curved portion extending from the front end portion of the frame terminating in a sharp turn to a substantially rearwardly projecting portion, F. and a substantially horizontally disposed rear portion of the frame fixed at its front end to the rearwardly projecting portion of the sharp turn, G. a rear axle assembly fixed to the rear end of the rear portion of the frame, H. said rear axle assembly comprising a left-hand tubular member having the front portion of its inner end fixed to the rear end of the frame, I. a right-hand tubular member In axial alignment with and axially spaced from the left-hand tubular member forming a sprocket slot between the inner ends thereof, J. and an upstanding strut fixed to the top portions of each tubular member to maintain their alignment, K. an idler axle journaled in the right-hand tubular member, L. a drive axle journaled in the left-hand tubular member, M. a sprocket fixed on the inner end of the drive axle located within the sprocket slot, N. a pedal crank on the rearwardly extending portion of the frame having a sprocket fixed thereto, O. and a drive chain interconnecting the sprockets.
Claim 3
Dependent Claim
37 words
A three-wheel tricycle chassis as in claim 1 wherein said chain drive interconnecting the sprockets includes a change speed transmission mounted on the rear portion of the frame and on the axle assembly tubular member and strut.
Claim 4
Dependent Claim
67 words
A three-wheel tricycle chassis as in claim 1 wherein the rear axle assembly includes axle shafts and axially demountable rear wheels on the outer ends of the axle shafts, and a basket assembly including a frame demountably clamped to the outer ends of the rear axle assembly adjacent the inside of the rear wheels, and rear fenders fixed to the basket assembly located over the rear wheels.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |