US3870338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual tricycle kit
Assignee: Individual
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Filing: 1973-08-02
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Granted: 1975-03-11
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Expires: 1993-08-02
Abstract
Abstract This device consists primarily of a rear frame and a front frame which are attachable to a pair of standard bicycle frames, the rear frame includes sleeve and shaft means carrying a plurality of sprockets for driving the rear wheels, the drive being a secondary chain by the two chains in sprocket of the standard bicycle frames which are a pair and the front frame includes tierod means for effecting steering of the device.
Inventors
- 👤 Frank W Holub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:24
CPC Classifications
B; B62; B62K; B62K13/00; B62K13/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
268 words
A dual tricycle kit for attaching a pair of standard bicycle frames in side-by-side relationship, each frame having a front portion, a rear portion and a drive chain, said kit comprising: a front assembly having (a) a wheel for supporting the front of the dual tricycle, (b) fork means rotatably carrying said wheel, (c) means for fastening said fork means midway between the front portion of each bicycle frame, (d) tie-rod means for connecting said fork with one bicycle frame for enabling steering of the dual tricycle; and a rear assembly having (a) a shaft, said shaft being longer than the distance between the assembled bicycle frames, (b) two drive sprockets, one of said sprockets being mounted at an end of said shaft, the other of said sprockets being mounted on said shaft a distance equal to the spacing between the assembled bicycle frames from said end, (c) two wheels for supporting the rear of the dual tricycle, (d) rear frame means having (1) bar means, said bar means being longer than said shaft, (2) yoke means at each end of said bar means for rotatably carrying said wheels, (3) means for rotatably supporting said shaft such that the other end of said shaft is adjacent to one of said wheels, (4) means for rigidly attaching the rear portion of each bicycle frame to said bar means such that the drive chain of each bicycle frame can be connected to one of said drive sprockets, and (e) means connecting said other end of said shaft to said adjacent wheel for driving the wheel upon rotation of said shaft.
Claim 2
Dependent Claim
268 words
A dual tricycle kit for attaching a pair of standard bicycle frames in side-by-side relationship, each frame having a front portion, a rear portion and a drive chain, said kit comprising: a front assembly having (a) a wheel for supporting the front of the dual tricycle, (b) fork means rotatably carrying said wheel, (c) means for fastening said fork means midway between the front portion of each bicycle frame, (d) tie-rod means for connecting said fork with one bicycle frame for enabling steering of the dual tricycle; and a rear assembly having (a) a shaft, said shaft being longer than the distance between the assembled bicycle frames, (b) two drive sprockets, one of said sprockets being mounted at an end of said shaft, the other of said sprockets being mounted on said shaft a distance equal to the spacing between the assembled bicycle frames from said end, (c) two wheels for supporting the rear of the dual tricycle, (d) rear frame means having (1) bar means, said bar means being longer than said shaft, (2) yoke means at each end of said bar means for rotatably carrying said wheels, (3) means for rotatably supporting said shaft such that the other end of said shaft is adjacent to one of said wheels, (4) means for rigidly attaching the rear portion of each bicycle frame to said bar means such that the drive chain of each bicycle frame can be connected to one of said drive sprockets, and (e) means connecting said other end of said shaft to said adjacent wheel for driving the wheel upon rotation of said shaft.
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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |