Patent US4293141A successfully refreshed from Google Patents.
US4293141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame for lightweight bicycle
Assignee: Harris Trust and Savings Bank Corp
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Filing: 1979-02-22
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Granted: 1981-10-06
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Expires: 1999-02-22
Abstract
Abstract Frame for high performance light weight bicycle having round top and bottom tubes secured at forward ends to head tube, with forward ends of top and bottom tubes being oval with a lateral width the same as diameter of round portions as a minor axis, tapering rearwardly from a forward maximum major axis, and a section modulus gradually increasing from that of round portions toward the forward ends.
Inventors
- 👤 Frank Brilando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:50
CPC Classifications
B; B62; B62K; B62K3/00; B62K3/02; B62K3/04; B62K19/00; B62K19/02; B62K19/04; B62K19/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
A frame for a high performance light weight bicycle, comprising a head tube, and top and bottom tubes having their forward ends secured to said head tube and extending rearwardly therefrom, with the major portions of said top and bottom tubes being round, and the forward end portions thereof being oval with a lateral width the same as the diameter of said round portions as a minor axis and tapering rearwardly from a maximum major axis adjacent said head tube.
Claim 2
Dependent Claim
80 words
A frame for a high performance light weight bicycle, comprising a head tube, and top and bottom tubes having their forward ends secured to said head tube and extending rearwardly therefrom, with the major portions of said top and bottom tubes being round, and the forward end portions thereof being oval with a lateral width the same as the diameter of said round portions as a minor axis and tapering rearwardly from a maximum major axis adjacent said head tube.
Claim 3
Dependent Claim
38 words
A frame according to claim 1, wherein the section modulus of each of the oval portions of said top and bottom tubes gradually increases from that of the round portions thereof toward the forward ends of said tubes.
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) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |