Patent US4330286A successfully refreshed from Google Patents.
US4330286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprocket for bicycle and the like
Assignee: Shimano Inc
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Filing: 1979-12-21
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Granted: 1982-05-18
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Expires: 1999-12-21
Abstract
Abstract A sprocket for a bicycle and the like comprising a sprocket body having many teeth provided on the outer periphery of the body. At least two adjacent teeth among these teeth are arranged in a row along an inclined line which inclines with respect to the central line along the thickness direction of the sprocket body, and the teeth located in the end portion, in the group of teeth arranged in the row are arranged in the same direction along the inclined line.
Inventors
- 👤 Masashi Nagano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:55
CPC Classifications
B; B62; B62M; B62M9/00; B62M9/04; B62M9/06; B62M9/10; F; F16; F16H; F16H55/00; F16H55/02; F16H55/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
A sprocket assembly of at least two sprocket bodies for a bicycle for selecting a driving chain, said chain being shiftable along a line which is angular to the sprocket comprising: a first circular sprocket body having a plurality of teeth along the periphery thereof, said teeth having a cross-section for receiving a driving chain and a second circular sprocket body having a diameter larger than the diameter of said first circular sprocket body coaxial with said first circular body having a plurality of teeth radially extending thereof, at least two of said teeth having a rectangular cross-section, the major axes of said two teeth coinciding with an inclined line inclined away from said second sprocket body towards said first sprocket body in the direction of movement of said bicycle, whereby said two teeth are easily meshed with said chain during shifting of said chain.
Claim 2
Dependent Claim
145 words
A sprocket assembly of at least two sprocket bodies for a bicycle for selecting a driving chain, said chain being shiftable along a line which is angular to the sprocket comprising: a first circular sprocket body having a plurality of teeth along the periphery thereof, said teeth having a cross-section for receiving a driving chain and a second circular sprocket body having a diameter larger than the diameter of said first circular sprocket body coaxial with said first circular body having a plurality of teeth radially extending thereof, at least two of said teeth having a rectangular cross-section, the major axes of said two teeth coinciding with an inclined line inclined away from said second sprocket body towards said first sprocket body in the direction of movement of said bicycle, whereby said two teeth are easily meshed with said chain during shifting of said chain.
Claim 3
Dependent Claim
57 words
The sprocket assembly of claim 1, wherein said second circular sprocket body has at least three adjacent teeth arranged in a row, the teeth at the end of said row having their major axes inclined along said inclined line, and the remaining tooth having a major axis coincident with the center line of said second sprocket body.
Claim 4
Dependent Claim
18 words
The sprocket of claim 1, wherein said two teeth are located near an edge of said sprocket body.
Claim 5
Dependent Claim
131 words
A sprocket assembly for a bicycle for selecting a driving chain, said chain being shiftable along a line which is angular to the sprocket comprising: a first circular sprocket body having a plurality of teeth along a periphery thereof, said teeth having a cross-section for receiving a driving chain and a second circular sprocket body coaxial with said first circular body having a plurality of teeth radially extending thereof, said plurality of teeth including two sets of teeth, at least two teeth in each set having a rectangular cross-section with a major and minor axis, the major axis of said two teeth coinciding with an line inclined away from a center line of said sprocket body whereby said two teeth are easily meshed with said chain during shifting of said chain.
Claim 6
Dependent Claim
131 words
A sprocket assembly for a bicycle for selecting a driving chain, said chain being shiftable along a line which is angular to the sprocket comprising: a first circular sprocket body having a plurality of teeth along a periphery thereof, said teeth having a cross-section for receiving a driving chain and a second circular sprocket body coaxial with said first circular body having a plurality of teeth radially extending thereof, said plurality of teeth including two sets of teeth, at least two teeth in each set having a rectangular cross-section with a major and minor axis, the major axis of said two teeth coinciding with an line inclined away from a center line of said sprocket body whereby said two teeth are easily meshed with said chain during shifting of said chain.
Claim 7
Dependent Claim
28 words
The sprocket assembly of claim 4, wherein the teeth of said first circular sprocket body have a major axis in parallel with the centerline of said first sprocket.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |