Patent US3850045A successfully refreshed from Google Patents.
US3850045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansible sprocket for bicycles
Assignee: Individual
•
Filing: 1973-07-18
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Granted: 1974-11-26
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Expires: 1993-07-18
Abstract
Abstract A transmission for bicycles and the like which includes a plurality of radially displaceable sprocket members with means for controlling the radial position of these sprockets members which positioning means includes a pair of plate members having reversed, identically curved paths thereon with the sprocket members mounted at the junction of the paths with means for controlling the relative speed between the two plates whereby the paths will be shifted with respect to one another and their junction point will increase or decrease radially thus moving the sprocket radially inwardly or outwardly.
Inventors
- 👤 D Hagen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:58
CPC Classifications
B; B62; B62M; B62M9/00; B62M9/04; B62M9/06; B62M9/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
174 words
A transmission for bicycles or the like which includes a source of rotary power and which is designed to drive a positive connection element such as a chain, which transmission includes; a. first Drive member connected to said rotary power source having a plurality of individual sprocket members arranged for straight line radial movement and positioning thereon; b. control and positioning means provided on each of said sprockets for radial positioning thereof; c. a first plate member having an arcuately radially increasing control path thereon and arranged to receive a selected portion of said control and positioning means therein; d. a second plate member having an arcuately radially increasing control path thereon in opposed relation to said control path of saId first member and arranged to receive a selected portion of said control and positioning means therein; e. means for selectively breaking one of said first or second plate members whereby said control and positioning means will be moved along said control paths and, f. the control paths providing a common radially communicating path.
Claim 2
Dependent Claim
174 words
A transmission for bicycles or the like which includes a source of rotary power and which is designed to drive a positive connection element such as a chain, which transmission includes; a. first Drive member connected to said rotary power source having a plurality of individual sprocket members arranged for straight line radial movement and positioning thereon; b. control and positioning means provided on each of said sprockets for radial positioning thereof; c. a first plate member having an arcuately radially increasing control path thereon and arranged to receive a selected portion of said control and positioning means therein; d. a second plate member having an arcuately radially increasing control path thereon in opposed relation to said control path of saId first member and arranged to receive a selected portion of said control and positioning means therein; e. means for selectively breaking one of said first or second plate members whereby said control and positioning means will be moved along said control paths and, f. the control paths providing a common radially communicating path.
Claim 3
Dependent Claim
36 words
The structure set forth in claim 1 and said first plate member being arranged adjacent said drive member and normally arranged for rotation therewith and arranged for relative rotation therebetween when said braking means is applied.
Claim 4
Dependent Claim
51 words
The structure set forth in claim 1 and said first plate member being arranged adjacent said drive member, said second plate member being arranged adjacent said first plate member, said control and positioning means arranged to extend through said first plate member and at least partially through said second plate member.
Claim 5
Dependent Claim
28 words
The structure set forth in claim 3 and said drive member being provided with an extending hub, said first and second plates arranged for rotation on said hub.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |