US4030375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derailleur for bicycle
Assignee: Shimano Inc
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Filing: 1976-03-31
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Granted: 1977-06-21
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Expires: 1996-03-31
Abstract
Abstract A derailleur for a bicycle, having four members which include a fitting member, two parallel linkage members and a movable member, among which four members two opposite members comprise one member pivotally supporting a cam plate in swingable relation and another member provided with a pin engageable with the cam face of the cam plate in swinging the cam plate by a pull of a control wire in changing the bicycle speed so that engagement of the cam plate with the pin defines the speed change stage position.
Inventors
- 👤 Masashi Nagano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:53
CPC Classifications
B; B62; B62M; B62M9/00; B62M9/04; B62M9/06; B62M9/10; B62M9/12; B62M9/121; B62M9/124; B62M9/1244; B62M9/1246
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
232 words
A derailleur for a bicycle, which is adapted to change the bicycle speed by shifting a drive chain to one sprocket of a freewheel by means of a pull of a control wire, comprising: a. a first fitting member, second and third linkage members pivoted at one end of the fitting member respectively, and a fourth movable member rotatably supported at its one end to the other end of each of the linkage members, said linkage members being swingable with respect to said fitting member, said movable member being swingable with respect to said linkage members and movable with respect to said fitting member, b. cages connected to the other end of said movable member, said cages carrying guide pulley means and moving together with said movable member to guide said drive chain therewith, c. a cam plate pivotally supported at its one end to one of said four members in swingable relation therewith, said cam plate having a cam face of a plurality of notches and a retainer attached to the other end opposite to said pivoted one end of the cam plate for retaining a terminal of the control wire, and d. a pin fixed to a member, movable relative to said one member pivotally supporting said cam plate among said four members, said pin being movable into contact with said cam face to be engaged with said notches respectively.
Claim 2
Dependent Claim
232 words
A derailleur for a bicycle, which is adapted to change the bicycle speed by shifting a drive chain to one sprocket of a freewheel by means of a pull of a control wire, comprising: a. a first fitting member, second and third linkage members pivoted at one end of the fitting member respectively, and a fourth movable member rotatably supported at its one end to the other end of each of the linkage members, said linkage members being swingable with respect to said fitting member, said movable member being swingable with respect to said linkage members and movable with respect to said fitting member, b. cages connected to the other end of said movable member, said cages carrying guide pulley means and moving together with said movable member to guide said drive chain therewith, c. a cam plate pivotally supported at its one end to one of said four members in swingable relation therewith, said cam plate having a cam face of a plurality of notches and a retainer attached to the other end opposite to said pivoted one end of the cam plate for retaining a terminal of the control wire, and d. a pin fixed to a member, movable relative to said one member pivotally supporting said cam plate among said four members, said pin being movable into contact with said cam face to be engaged with said notches respectively.
Claim 3
Dependent Claim
45 words
The derailleur according to claim 1, wherein said cam plate is pivotally supported by said first fitting member and said pin is fixed to one of said second and third linkage members swingable with respect to said first fitting member and said fourth movable member.
Claim 4
Dependent Claim
15 words
The derailleur according to claim 2, wherein said pin is fixed to said movable member.
Claim 5
Dependent Claim
17 words
The derailleur according to claim 2, wherein said pin is fixed on one of said linkage members.
Claim 6
Dependent Claim
49 words
The derailleur according to claim 2, wherein one end of said fitting member is extended towards said fourth movable member to form an extension, said extension having a tip positioned substantially at a lengthwise middle portion of one of said linkage members and having said cam plate pivoted thereto.
Claim 7
Dependent Claim
45 words
The derailleur according to claim 1, wherein said cam plate is pivotally supported by said fourth movable member and said pin is fixed to one of said first fitting member and said second and third linkage members, which are movable relative to said movable member.
Claim 8
Dependent Claim
15 words
The derailleur according to claim 6, wherein said pin is fixed to said fitting member.
Claim 9
Dependent Claim
17 words
The derailleur according to claim 6, wherein said pin is fixed to one of said linkage members.
Claim 10
Dependent Claim
49 words
The derailleur according to claim 6, wherein said movable member is extended at its one end towards said fitting member to form an extension, said extension having a tip positioned substantially at a lengthwise middle portion of one of said linkage members and having said cam plate pivoted thereto.
Claim 11
Dependent Claim
60 words
The derailleur according to claim 1, wherein said cam plate is pivotally supported by one of said second and third linkage members and said pin is fixed to one of the other of said linkage members, said first fitting member and said fourth movable member, which are movable relative to said one of the second and third linkage members respectively.
Claim 12
Dependent Claim
15 words
The derailleur according to claim 10, wherein said pin is fixed to said fitting member.
Claim 13
Dependent Claim
15 words
The derailleur according to claim 10, wherein said pin is fixed to said movable member.
Claim 14
Dependent Claim
30 words
The derailleur according to claim 10, wherein said pin is fixed to said the other linkage member movable relative to said one linkage member pivotally supported by said cam plate.
Claim 15
Dependent Claim
48 words
The derailleur according to claim 1, wherein said cam plate comprises a plate member, said cam plate having an elongated curved hole defined therethrough, said hole being larger in width than the diameter of said pin, said hole having said plurality of notches at the inner surface thereof.
Claim 16
Dependent Claim
47 words
The derailleur according to claim 1, wherein said notches of said cam face of said cam plate are formed in arcs of circles concentered with said pivot at said cam plate respectively, next adjacent ones of said notches being connected to each other with a slant face.
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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |