US3836177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricycle
Assignee: Individual
•
Filing: 1973-08-28
•
Granted: 1974-09-17
•
Expires: 1993-08-28
Abstract
Abstract The front wheel is removed from a bicycle, and a transverse axle is attached to the steering fork. The fork is in turn secured to the bicycle frame. A steering shaft connects the handle bars through the fork and head tubes to a pivotal joint with the axle. Tie rods translate force applied at the shaft to wheels which are pivotally disposed at the axle extremities.
Inventors
- 👤 P Heidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:35
CPC Classifications
B; B62; B62K; B62K5/00; B62K5/02; B62K5/05
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
153 words
A tricycle comprising: a bicycle frame having a rear wheel, pedal drive apparatus, and a head tube in the front of said frame; steering fork means rigidly attached to said frame and including a crown portion and fork arms depending downwardly from said crown portion, a fork tube extending upwardly from said crown portion and through said head tube, said shaft extending through said fork tube, and means for rigidly securing said steering fork means in a predetermined position relative to said frame; an axle attached transversely to and at the bottom of said fork arms; a shaft extending through said head tube and being pivotally attached to said axle; steering means attached at the top of said shaft; first and second wheels pivotally secured at either end of said axle; and first and second rods for pivoting said wheels in response to turning force applied to said shaft through said steering means.
Claim 2
Dependent Claim
153 words
A tricycle comprising: a bicycle frame having a rear wheel, pedal drive apparatus, and a head tube in the front of said frame; steering fork means rigidly attached to said frame and including a crown portion and fork arms depending downwardly from said crown portion, a fork tube extending upwardly from said crown portion and through said head tube, said shaft extending through said fork tube, and means for rigidly securing said steering fork means in a predetermined position relative to said frame; an axle attached transversely to and at the bottom of said fork arms; a shaft extending through said head tube and being pivotally attached to said axle; steering means attached at the top of said shaft; first and second wheels pivotally secured at either end of said axle; and first and second rods for pivoting said wheels in response to turning force applied to said shaft through said steering means.
Claim 3
Dependent Claim
30 words
A tricycle as described in claim 1 wherein said steering shaft terminates at its lower end in a plate, said first and second rods being pivotally attached to said plate.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |