US3896679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bicycle derailer
Assignee: Huret et ses Fils SA
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Filing: 1973-11-19
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Granted: 1975-07-29
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Expires: 1993-11-19
Abstract
Abstract The invention relates to a bicycle derailer comprising a chainguide roller and a chain-tensioning roller mounted rotatively on spindles carried by a cover-frame, a spindle receiving said cover-frame pivotally and a spring fastened to the cover-frame in order constantly to tend to make it pivot and maintain the driving chain under tension, a means for controlling the movement of the cover-frame parallel to the axle of the free wheel of the bicycle and passing the driving chain from one pinion of this wheel to another, and is characterized in that the pivot spindle of the cover-frame is mounted on a means controlling the movement of the cover-frame parallel to the axle of the free wheel, by means of a support constituting a means of guiding the free movement of the pivot spindle of the cover-frame toward and away from the axle of the free wheel.
Inventors
- 👤 Roger Henri Marius Huret
- 👤 Jacques Andre Huret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:58
CPC Classifications
B; B62; B62M; B62M9/00; B62M9/04; B62M9/06; B62M9/10; B62M9/12; B62M9/121; B62M9/124; B62M9/1242
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
A derailer for a bicycle including a driving chain and a free wheel having an axle and an associated plurality of pinions operable to receive said driving chain, comprising a chain-guide roller and a chain-tensioning roller mounted rotatively on spindles carried by a cover-frame, a spindle receiving said cover-frame pivotally and a spring fitted to the cover-frame tending constantly to make it pivot and maintain the driving chain under tension, a control means for controlling the movement of the cover-frame essentially parallel to the axle of the free wheel of the bicycle and for passing the driving chain from one pinion of this wheel to another, the pivot spindle of the coverframe being mounted on said control means by support means for guiding the free movement of the pivot spindle of the cover-frame toward or away from the axle of the free wheel in a plane essentially perpendicular to said axle in each position of a plurality of positions of the cover frame along the direction essentially parallel to said axle.
Claim 2
Dependent Claim
171 words
A derailer for a bicycle including a driving chain and a free wheel having an axle and an associated plurality of pinions operable to receive said driving chain, comprising a chain-guide roller and a chain-tensioning roller mounted rotatively on spindles carried by a cover-frame, a spindle receiving said cover-frame pivotally and a spring fitted to the cover-frame tending constantly to make it pivot and maintain the driving chain under tension, a control means for controlling the movement of the cover-frame essentially parallel to the axle of the free wheel of the bicycle and for passing the driving chain from one pinion of this wheel to another, the pivot spindle of the coverframe being mounted on said control means by support means for guiding the free movement of the pivot spindle of the cover-frame toward or away from the axle of the free wheel in a plane essentially perpendicular to said axle in each position of a plurality of positions of the cover frame along the direction essentially parallel to said axle.
Claim 3
Dependent Claim
23 words
A bicycle derailer according to claim 1, in which the spindle of the cover-frame is common to the spindle of the chain-guide roller.
Claim 4
Dependent Claim
57 words
A derailer according to claim 1, in which the spring is placed around the pivot spindle of the cover frame and is fastened by one of its ends to the cover-frame and by its other end to a support point, the angular position of which is constant with respect to the pivot spindle of the cover frame.
Claim 5
Dependent Claim
70 words
A derailer according to claim 1, in which the support means comprises a deformable parallelogram fixed, by one of its sides, to the control means and mounted by an opposite side, on the pivot spindle of the cover-frame, the chain-tensioning spring placed around the pivot spindle of the cover-frame being fastened, on one end, to the cover-frame, and on the other end, to said opposite side of the deformable parallelogram.
Claim 6
Dependent Claim
14 words
A derailer according to claim 4, in which the deformable parallelogram is diamond shaped.
Claim 7
Dependent Claim
35 words
A derailer according to claim 2, in which the support means comprises a deformable parallelogram, one of whose vertices has a fulcrum pin, the spindle of said cover frame being common to said fulcrum pin.
Claim 8
Dependent Claim
69 words
A derailer according to claim 1, in which the support comprises a slide block accommodating a slide piece, the slide block being fixed to the control means, the slide piece being fixed to the pivot spindle of the cover-frame and the chain-tensioning spring, placed around the pivot spindle of the cover-frame, being fastened, on one end, to the cover frame, and on the other end, to the slide piece.
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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |