Patent US4728113A successfully refreshed from Google Patents.
US4728113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe connector for a tubular frame bicycle
Assignee: Alfred Thun GmbH and Co KG
•
Filing: 1986-07-31
•
Granted: 1988-03-01
•
Expires: 2006-07-31
Abstract
Abstract A tubing connector for a tubular frame of a bicycle comprises a plurality of hemispherical mounting pieces protruding radially exteriorly from the tubing connector. These hemispherical mounting pieces are positioned on the tubing connector so that each of the ends of the tubes of the tubing frame can be engaged on one of the mounting pieces and attached thereto for example by welding. Using hemispherical instead of cylindrical mounting pieces allows the same tubing connector to be used in many different tubing frames having different tubing diameters and tubing angles.
Inventors
- 👤 Alfred Thun, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:33
CPC Classifications
B; B62; B62K; B62K19/00; B62K19/02; B62K19/04; B62K19/06; B62K19/18; B62K19/30; B62K19/34; F; F16; F16B; F16B2200/00; F16B2200/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
A tubing assembly for a bicycle frame, comprising: a tubular metal connector formed with a cylindrical wall and a plurality of spaced apart hemispherical bulges protruding radially exteriorly from said cylindrical wall; respective tubes adapted to define said frame and each having an end closely fitted over and wholly receiving a respective one of said bulges whereby an end face of each tube substantially meets said cylindrical wall at a base of the respective bulge, whereby each of said hemispherical bulges is wholly received in a respective one of said tubes; and respective circular weld seams welding each end face to said wall at the base of the respective hemispherical bulge.
Claim 2
Dependent Claim
111 words
A tubing assembly for a bicycle frame, comprising: a tubular metal connector formed with a cylindrical wall and a plurality of spaced apart hemispherical bulges protruding radially exteriorly from said cylindrical wall; respective tubes adapted to define said frame and each having an end closely fitted over and wholly receiving a respective one of said bulges whereby an end face of each tube substantially meets said cylindrical wall at a base of the respective bulge, whereby each of said hemispherical bulges is wholly received in a respective one of said tubes; and respective circular weld seams welding each end face to said wall at the base of the respective hemispherical bulge.
Claim 3
Dependent Claim
77 words
The tubing assembly defined in claim 1 wherein said connector is a pedal-link bearing housing formed from two interlocked sheet metal elements and provided with at least three of said bulges each having a respective end of a respective tube fitted thereover and welded to said connector by a respective circular weld seam, two of said bulges being formed on one of said elements, the other of said bulges being formed on the other of said elements.
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) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |