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US3710636A
Expired / Lapsed
US
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Method of producing a bicycle chain shifting device and the same produced thereby
Assignee: MAEDA IND
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Filing: 1971-06-07
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Granted: 1973-01-16
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Expires: 1991-06-07
Abstract
Abstract A method of producing a bicycle chain shifting device by stamping a metallic plate and bending the same in the upright directions thereby integrally forming a chain guard body without using a single piece of connecting means. The invention further involves the products provided in said method.
Inventors
- 👤 N Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:27
CPC Classifications
B; B62; B62M; B62M9/00; B62M9/04; B62M9/06; B62M9/10; B62M9/12; B62M9/121; B62M9/126
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
A method of producing a bicycle chain shifting device, comprising the steps of stamping a single sheet of a metallic plate in one step, thereby forming an integrally connected chain guard means, bending said metallic plate along at least two predetermined bending portions at right angles in one direction, in order to provide at least two integral channel portions, and assembling said chain guard means into a completed chain shifting device.
Claim 2
Independent Claim
71 words
A method of producing a bicycle chain shifting device, comprising the steps of stamping a single sheet of a metallic plate in one step, thereby forming an integrally connected chain guard means, bending said metallic plate along at least two predetermined bending portions at right angles in one direction, in order to provide at least two integral channel portions, and assembling said chain guard means into a completed chain shifting device.
Claim 3
Dependent Claim
67 words
The method of producing a bicycle chain shifting device, as set forth in claim 1, which includes the steps of forming an integral stopper means during the said step of stamping a single sheet of metallic plate in one step, and bending said stamped plate along a predetermined bending portion at a substantially right angle, so as to restrain the pivotal movement of said chain guard means.
Claim 4
Dependent Claim
114 words
A bicycle chain shifting device, comprising a chain guard body integrally formed of a single sheet of metallic plate, at least two channel portions formed with said chain guard body, at least one bracket means for supporting said chain guard body, at least one connecting means for mounting said chain guard body to said supporting bracket, at least two pulleys engageable with a driving chain, provided in each of said two channel portions, respectively, at least two pulley shafts for rotatably supporting said pulleys, at least two pairs of bores for receiving said two pulley shafts respectively, and at least one spring mechanism for operatively restraining the pivotal movement of said chain guard body.
Claim 5
Dependent Claim
114 words
A bicycle chain shifting device, comprising a chain guard body integrally formed of a single sheet of metallic plate, at least two channel portions formed with said chain guard body, at least one bracket means for supporting said chain guard body, at least one connecting means for mounting said chain guard body to said supporting bracket, at least two pulleys engageable with a driving chain, provided in each of said two channel portions, respectively, at least two pulley shafts for rotatably supporting said pulleys, at least two pairs of bores for receiving said two pulley shafts respectively, and at least one spring mechanism for operatively restraining the pivotal movement of said chain guard body.
Claim 6
Dependent Claim
27 words
The bicycle chain shifting device, as set forth in claim 3, further comprising an integral stopper means for restraining the pivotal movement of said chain guard body.
References Cited (Backward Citations)
US2187368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |