US3922929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bicycle pedal crank extender
Assignee: Individual
•
Filing: 1973-12-12
•
Granted: 1975-12-02
•
Expires: 1993-12-12
Abstract
Abstract An extender for removable attachment to the lower end of and for extending the length of a conventional bicycle pedal crank and adjustably lowering the bicycle pedal relative to the bicycle seat. The extender is formed of an elongated channel shaped to receive the lower end portion of a conventional pedal crank with the upper end of the extender shaped to spring grip the crank. The lower end of the extender is formed with a threaded socket to receive and threadedly engage the threaded mounting stud of a conventional bicycle pedal. The base of the extender channel is formed with a longitudinally elongated slot for overlapping the conventional pedal stud receiving opening formed in the lower end of the crank. A bolt fits through the slot and the crank pedal stud receiving opening to lock the extender in longitudinally adjustable positions upon the crank.
Inventors
- 👤 John L Marchello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:25
CPC Classifications
B; B62; B62M; B62M3/00; B62M3/02; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20888; Y10T74/209; Y10T74/21; Y10T74/2164; Y10T74/2168; Y10T74/2172
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
263 words
An extender for removable attachment to the lower end of and for adjustably extending the length of a conventional bicycle pedal crank having a shaft portion terminating in an end portion having an opening for receiving and mounting a conventional bicycle pedal mounting stud, comprising: an elongated, stamped metal channel formed to include a base and integral legs and having an upper end and a lower end, said upper end receiving the crank shaft, and the channel being of a size to receive said crank shaft portion and end portion, with the portions of the legs at the extender upper end converging toward each other and being spaced apart a sufficient distance to resiliently frictionally grip the shaft portion between them, and said base being longitudinally slit at its upper end in the region where the legs converge and grip the shaft to permit resilient movement of the converging leg portions for receiving and gripping the shaft; a longitudinally elongated slot formed in said base for overlapping the crank end portion opening, and for receiving a bolt engaged with said end portion opening for thereby fastening the crank to the extender, wherein the extender may be adjusted lengthwise of the crank within the limits of the length of said slot; and a threaded socket rigidly connected to the lower end of the extender for receiving and securing said pedal mounting stud for thereby mounting a bicycle pedal upon the extender rather than upon the crank directly, said socket having a thickness several times greater than the thickness of the stamped metal channel base.
Claim 2
Dependent Claim
263 words
An extender for removable attachment to the lower end of and for adjustably extending the length of a conventional bicycle pedal crank having a shaft portion terminating in an end portion having an opening for receiving and mounting a conventional bicycle pedal mounting stud, comprising: an elongated, stamped metal channel formed to include a base and integral legs and having an upper end and a lower end, said upper end receiving the crank shaft, and the channel being of a size to receive said crank shaft portion and end portion, with the portions of the legs at the extender upper end converging toward each other and being spaced apart a sufficient distance to resiliently frictionally grip the shaft portion between them, and said base being longitudinally slit at its upper end in the region where the legs converge and grip the shaft to permit resilient movement of the converging leg portions for receiving and gripping the shaft; a longitudinally elongated slot formed in said base for overlapping the crank end portion opening, and for receiving a bolt engaged with said end portion opening for thereby fastening the crank to the extender, wherein the extender may be adjusted lengthwise of the crank within the limits of the length of said slot; and a threaded socket rigidly connected to the lower end of the extender for receiving and securing said pedal mounting stud for thereby mounting a bicycle pedal upon the extender rather than upon the crank directly, said socket having a thickness several times greater than the thickness of the stamped metal channel base.
Claim 3
Dependent Claim
57 words
An extender as defined in claim 1 and the upper roughly one-third of said channel base being bent inwardly, that is, in a direction towards the free long edges of the channel legs, at a wide obtuse angle relative to the remaining portion of the channel base, for thereby receiving curved conventional pedal cranks within the channel.
Claim 4
Dependent Claim
62 words
An extender as defined in claim 1, wherein said legs extend along the sides of the base and continue around the lower end to completely enclose the base except for its upper end, said threaded socket having an axis for receiving said pedal mounting stud, and said legs extending parallel to the socket axis for receiving and gripping the pedal crank shaft.
Claim 5
Dependent Claim
87 words
An extender as defined in claim 1, and said channel being formed of a single piece of sheet-like metal; and said socket rigidly connected to the lower end of the extender comprising an insert member having a threaded opening for threadedly engaging a threaded pedal mounting stud, with the insert member being permanently fastened within the channel at the lower end of the channel, whereby inserts having threaded openings of different thread size and direction may be fastened within identical channels for mounting different standard pedal studs.
Claim 6
Dependent Claim
36 words
An extender as defined in claim 4, and said insert being partially arranged within and surrounded by the wall defining a hole formed in the base of the channel at the lower end of the channel.
References Cited (Backward Citations)
US2533011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |