US4770435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Freestyle bicycle construction
Assignee: North America Tradimpex Cycles Inc
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Filing: 1987-06-29
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Granted: 1988-09-13
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Expires: 2007-06-29
Abstract
Abstract An improved freestyle bicycle construction is disclosed, featuring an improved rear wheel caliber brake linkage which can be preassembled while the bicycle is in relatively unassembled condition, thereby facilitating assembly by a merchant or the ultimate user.
Inventors
- 👤 Martin Cristie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:19
CPC Classifications
B; B62; B62L; B62L3/00; B62L3/02; B62J; B62J11/00; B62J11/10; B62J11/13; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/2078; Y10T74/20786; Y10T74/20822
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
173 words
In a freestyle bicycle including a frame element having a front stem, a front fork supporting a front wheel, said fork having a hollow tube projecting through said stem for relative rotation therewith, handlebars supported by said tube, and rear wheel caliper brake means controlled from a lever on said handlebars, said brake element including upper and lower rotors capable of relative rotation to permit said fork to be rotated in either of two rotational directions in infinite degree, the improvement comprising: said fork tube being substantially longer than said stem and having an upper end portin thereof extending outwardly of said stem; a hollow sleeve engaged upon said upper end portion of said fork tube, said sleeve having an outer cylindrical surface, said upper and lower rotors being rotationally positioned on said outer surface; a rotor spring positioned concentrically upon said stem above said upper rotor, and a head lock nut having an internally threaded lower end disposed above said return spring and engaged upon said upper end portion of said tube.
Claim 2
Dependent Claim
173 words
In a freestyle bicycle including a frame element having a front stem, a front fork supporting a front wheel, said fork having a hollow tube projecting through said stem for relative rotation therewith, handlebars supported by said tube, and rear wheel caliper brake means controlled from a lever on said handlebars, said brake element including upper and lower rotors capable of relative rotation to permit said fork to be rotated in either of two rotational directions in infinite degree, the improvement comprising: said fork tube being substantially longer than said stem and having an upper end portin thereof extending outwardly of said stem; a hollow sleeve engaged upon said upper end portion of said fork tube, said sleeve having an outer cylindrical surface, said upper and lower rotors being rotationally positioned on said outer surface; a rotor spring positioned concentrically upon said stem above said upper rotor, and a head lock nut having an internally threaded lower end disposed above said return spring and engaged upon said upper end portion of said tube.
Claim 3
Dependent Claim
44 words
The improvement set forth in claim 1, further characterized in said hollow sleeve having internal threads at a lower end thereof engaged upon said upper end portion of said fork tube, said head lock nut being countersunk to avoid binding of said hollow sleeve.
Claim 4
Dependent Claim
36 words
The improvements set forth in claim 1, further characterized in said hollow sleeve being completely free of threading, and maintained upon said fork tube by the engagement of said head lock nut upon said fork tube.
References Cited (Backward Citations)
US4616523A
Cited
US4653768A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |