Patent US3910136A successfully refreshed from Google Patents.
US3910136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection apparatus for a speed change mechanism of a bicycle or similar vehicle
Assignee: Individual
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Filing: 1974-04-11
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Granted: 1975-10-07
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Expires: 1994-04-11
Abstract
Abstract Protection apparatus for a speed change mechanism mounted on a spoked rear wheel of a two-wheeled vehicle. The speed change mechanism includes a roller assembly for shifting a chain transversely to effect speed change. The protection apparatus comprises a counter-flange on the roller assembly disposed between the rear wheel and the roller assembly, the counterflange having a peripheral edge with a plurality of bend regions at locations where the counter-flange could contact the spokes of the wheel if the roller assembly were excessively displaced. The bend regions are bent in a direction away from the rear wheel to prevent insertion between the spokes of the rear wheel.
Inventors
- 👤 Lucien Charles Hippolyte Juy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:18
CPC Classifications
B; B62; B62M; B62M9/00; B62M9/04; B62M9/06; B62M9/10; B62M9/12; B62M9/121; B62M9/128; B62M9/126
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
Protection apparatus for a speed change mechanism mounted on a spoked rear wheel of a vehicle in which a chain is transversely displaced by a roller assembly to effect speed change, said protection apparatus comprising a counter-flange on the roller assembly disposed between the rear wheel and the roller assembly, said counter-flange having a peripheral edge with a plurality of bend regions at locations where the counter-flange could contact the spokes of the wheel if the roller assembly were excessively displaced towards said spokes, said bend regions being bent in a direction away from the rear wheel to prevent insertion of the counterflange between the spokes of the rear wheel.
Claim 2
Dependent Claim
110 words
Protection apparatus for a speed change mechanism mounted on a spoked rear wheel of a vehicle in which a chain is transversely displaced by a roller assembly to effect speed change, said protection apparatus comprising a counter-flange on the roller assembly disposed between the rear wheel and the roller assembly, said counter-flange having a peripheral edge with a plurality of bend regions at locations where the counter-flange could contact the spokes of the wheel if the roller assembly were excessively displaced towards said spokes, said bend regions being bent in a direction away from the rear wheel to prevent insertion of the counterflange between the spokes of the rear wheel.
Claim 3
Dependent Claim
79 words
Apparatus as claimed in claim 1 wherein said counter-flange has a plurality of angular positions with a plurality of locations successively closest to the rear wheel at which said bend regions are provided, said bend regions being curved to extend around the axis of an associated roller over a substantial extent, and being bent to provide a sufficient spacing with the roller to permit passage of the chain between the bent part of the bend region and the roller.
Claim 4
Dependent Claim
46 words
Apparatus as claimed in claim 2 wherein said roller has teeth and said chain includes pins, said bent part being sufficiently spaced from the roller to allow the chain to pass therebetween and the pins of the chain to rest between the teeth of the roller.
Claim 5
Dependent Claim
70 words
Apparatus as claimed in claim 1 wherein each said bend region on said counter-flange includes a projection in a zone corresponding to the approach and passage of the spokes of the wheel in regard to the rotation of the wheel for advance of the vehicle, said projection having a profiled extremity and an edge bent towards said roller assembly and sufficiently spaced therefrom to permit free passage of said chain.
Claim 6
Dependent Claim
16 words
Apparatus as claimed in claim 1 wherein said counter-flange is provided with holes for weight reduction.
Claim 7
Dependent Claim
21 words
Apparatus as claimed in claim 1 wherein said counter-flange is constructed from sheet metal which is punched and stamped to shape.
Claim 8
Dependent Claim
14 words
Apparatus as claimed in claim 1 wherein said counter-flange is constructed from plastic material.
Claim 9
Dependent Claim
74 words
Apparatus as claimed in claim 1 wherein said counter-flange has a lower end facing the chain where it enters the roller assembly, said counter-flanger being shaped at said lower end to prevent the chain from riding on the edge of said counter-flange at said lower end when the upper part of the roller assembly is upwardly and forwardly pivoted relative to the axle of the rear wheel for speed change to higher gear ratios.
Claim 10
Dependent Claim
17 words
Apparatus as claimed in claim 1 wherein said counter-flange is in the general shape of an 8.
Claim 11
Dependent Claim
30 words
Apparatus as claimed in claim 1 wherein said bend regions are curved so that contact thereof with the spokes will cause the counter-flange to be displaced away from the wheel.
Claim 12
Dependent Claim
57 words
Apparatus as claimed in claim 1 wherein said roller assembly includes upper and lower rollers, the chain passing on a portion of said lower roller and then on a portion of said upper roller, one of said bend regions being formed on said counter-flange adjacent the upper roller and overlying the chain passing on said upper roller.
Claim 13
Dependent Claim
16 words
Apparatus as claimed in claim 11 wherein said one bend region has an elongated peripheral eDge.
Claim 14
Dependent Claim
19 words
Apparatus as claimed in claim 11 wherein a second of said bend regions is formed proximate the lower roller.
Claim 15
Dependent Claim
57 words
Apparatus as claimed in claim 11 wherein a third of said bend regions is formed at the bottom of said counter-flange in immediate proximity to where the chain passes on said lower roller and is so shaped to retain the chain on the lower roller and to prevent the chain from riding up and over the counter-flange.
References Cited (Backward Citations)
FR923764A
Cited
FR1026080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |