IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0034003
(2008-02-20)
|
등록번호 |
US-8721480
(2014-05-13)
|
우선권정보 |
FR-07 01320 (2007-02-23) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
10 |
초록
▼
The bicycle crankset includes a bottom bracket axle, two cranks and a chainring carrier bearing first and second different toothed chainrings. The chainring carrier has the shape of a star, of which each arm is provided with a mounting hole aligned with a mounting hole in the first and second chainr
The bicycle crankset includes a bottom bracket axle, two cranks and a chainring carrier bearing first and second different toothed chainrings. The chainring carrier has the shape of a star, of which each arm is provided with a mounting hole aligned with a mounting hole in the first and second chainrings respectively. These holes accommodate elements for fastening chainrings to the chainring carrier, and they are arranged on a first circle with a predetermined diameter. Each arm of the chainring carrier is provided with a second mounting hole arranged on a second circle with a diameter that has been reduced relative to the first circle to match the chainring carrier to two other toothed circular chainrings with a size that is respectively reduced relative to the first and second chainrings and of which the mounting holes are located on the second circle.
대표청구항
▼
1. Bicycle crankset comprising: a bottom bracket axle (2) with two opposite ends;two cranks, each of said cranks attached to a respective one of the opposite ends of said bottom bracket axle;first and second circular toothed chainrings (5, 6) of different sizes,aligned mounting holes (12, 13) provid
1. Bicycle crankset comprising: a bottom bracket axle (2) with two opposite ends;two cranks, each of said cranks attached to a respective one of the opposite ends of said bottom bracket axle;first and second circular toothed chainrings (5, 6) of different sizes,aligned mounting holes (12, 13) provided in said first and second chainrings (5, 6) respectively;a chainring carrier (8) provided with a central hole (9) for accommodating said bottom bracket axle (2) and bearing the first and second chainrings (5, 6), said chainring carrier (8) having the shape of a star with uniformly spaced arms (10), each arm (10) have a free end and being provided near the free end with a first mounting hole (11) aligned with said aligned mounting holes (12, 13) of said first and second chainrings (5, 6) respectively; andfastening means (14, 15) that extend through said first mounting hole (11) of each arm and, at the same time, through said aligned mounting holes (12, 13) of both of said first and second chainrings (5, 6) such that each fastening means (14, 15) thereby fastens both said first and second circular toothed chainrings (5,6) to said chainring carrier (8),wherein, said first mounting hole of each arm (11) and said aligned mounting holes (12, 13) of said first and second chainrings (5, 6) are arranged on a first circle (C1) with a predetermined diameter (D1) and centered on said central hole (9) of the chainring carrier, andwherein each arm (10) of the chainring carrier (8) is further provided with a second mounting hole (16) which is disposed on a second circle (C2) that is concentric relative to said first circle (C1) and having a diameter (D2) that is reduced relative to the diameter (D1) of said first circle (C1),wherein said second mounting hole (16) of said arms (10) enables replacement of said first and second chainrings (5, 6) by two other first and second circular toothed chainrings (5′, 6′) being compact chainrings with a size that is respectively reduced relative to a size of said first and second chainrings (5, 6), and with mounting holes (12, 13) located on said second circle (C2), thus obtaining a multipurpose chainring carrier (8), and wherein,each arm of said chainring carrier (8) extends substantially radially,each arm (10) of said chainring carrier (8) is defined by two lateral sides (17, 18) that are essentially parallel to one another and connected by an end side (19), andsaid end side (19) is oblique relative to said lateral sides (17, 18), and said first mounting hole and said second mounting hole of each arm are aligned to one another parallel to said end side. 2. Component parts for a bicycle crankset according to claim 1, wherein, said first circle (C1) has a diameter of 130 mm, andsaid second circle (C2) has a diameter of 110 mm. 3. Bicycle crankset according to claim 1, wherein, said fastening means including crosspieces adapted for being arranged uniformly between the first and second circular toothed chainrings (5, 6). 4. Bicycle crankset according to claim 3, wherein said crosspieces (20) are composed of washers. 5. Bicycle crankset according to claim 3, wherein said first circle (C1) has a diameter of about 130 mm. 6. Bicycle crankset according to claim 5, wherein said second circle (C2) has a diameter of about 110 mm. 7. Bicycle crankset according to claim 1, wherein said chainring carrier (8) is located outside said first and second chainrings (5, 6). 8. Bicycle crankset according to claim 1, wherein, each said fastening means includes a screw (14) engaged with a flared nut (15) that are arranged on either side of an assembly composed of the chainring carrier (8) and the first and second chainrings (5, 6), with the screw (14) and the flared nut (15) fastening both said first and second circular toothed chainrings (5,6) to said chainring carrier (8) through a single one of said first mounting holes.
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