Bicycle rim and wheel having inner protrusions
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B60B-021/02
B60B-021/04
B60B-021/06
B60B-001/00
B60B-001/04
출원번호
US-0042768
(2016-02-12)
등록번호
US-9950561
(2018-04-24)
발명자
/ 주소
Hall, Michael
Morse, David
Trouw, Ruan
출원인 / 주소
SRAM, LLC
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
A rim for a bicycle wheel includes a radially outer tire-engaging portion, a first sidewall, and a second sidewall spaced apart from the first sidewall. The first and second sidewalls may extend radially inward of the radially outer tire-engaging portion. The rim includes a radially inner portion ha
A rim for a bicycle wheel includes a radially outer tire-engaging portion, a first sidewall, and a second sidewall spaced apart from the first sidewall. The first and second sidewalls may extend radially inward of the radially outer tire-engaging portion. The rim includes a radially inner portion having at least one asymmetric protrusion.
대표청구항▼
1. A rim for a bicycle wheel, the rim comprising: a radially outer tire-engaging portion;a first sidewall;a second sidewall spaced apart from the first sidewall, the first and second sidewalls extending radially inward of the radially outer tire-engaging portion; anda radially inner portion comprisi
1. A rim for a bicycle wheel, the rim comprising: a radially outer tire-engaging portion;a first sidewall;a second sidewall spaced apart from the first sidewall, the first and second sidewalls extending radially inward of the radially outer tire-engaging portion; anda radially inner portion comprising a spoke receiving surface disposed along an inner circumference of the rim, wherein at least one protrusion is formed in the spoke receiving surface towards a center of the rim asymmetrically about a radial centerline of the at least one protrusion in a circumferential direction of the rim. 2. The rim of claim 1, wherein the at least one protrusion is a tubercle. 3. The rim of claim 1, wherein the spoke receiving surface including the at least one protrusion forms a convex curve across the width of the spoke receiving surface. 4. The rim of claim 1, wherein the spoke receiving surface comprises a plurality of holes configured to receive a plurality of spokes. 5. The rim of claim 4, wherein the at least one protrusion comprises a hole of the plurality of holes configured to receive a spoke of the plurality of spokes. 6. The rim of claim 5, wherein the at least one protrusion comprises at most one (“1”) hole of the plurality of holes. 7. The rim of claim 1, wherein the at least one protrusion extends between a first position on the inner circumference of the rim and a second position on the inner circumference of the rim and has a peak position disposed between the first position and the second position. 8. The rim of claim 7, wherein an inner diameter of the inner circumference has a first radial value at the first position, a second radial value at the second position, and a third radial value at the peak position, the third radial value being less than the first radial value and the second radial value. 9. The rim of 8, wherein the third radial value is a smallest radial value of the inner diameter of the inner circumference of the rim between the first position and the second position. 10. The rim of claim 7, wherein the peak position is asymmetrically disposed between the first position and the second position. 11. The rim of claim 10, wherein a circumferential distance between the first position and the peak position is a first circumferential distance, a circumferential distance between the second position and the peak position is a second circumferential distance, and the peak position is disposed such that the first circumferential distance is eighty percent (“80%”) or less than the second circumferential distance. 12. The rim of claim 1, wherein the rim has an axial width, and a radial distance of the inner diameter at the spoke receiving surface along the axial width varies continuously and symmetrically about a bisecting plane perpendicular to the axial direction. 13. The rim of claim 12, wherein a peak position of the at least one protrusion is located within the bisecting plane. 14. The rim of claim 1, wherein the at least one protrusion is a plurality of protrusions. 15. The rim of claim 14, wherein the plurality of protrusions are disposed evenly around the inner circumference of the rim. 16. The rim of claim 14, wherein the spoke receiving surface is configured to receive at most one (“1”) spoke for every protrusion included therein. 17. The rim of claim 1, wherein the spoke receiving surface meets the first sidewall and the second sidewall at a base diameter of the rim, and the protrusion includes a peak position having a smallest radial value of the inner diameter along the protrusion, the peak position being a peak distance removed from the base diameter. 18. The rim of claim 17, wherein the at least one protrusion is a plurality of protrusions disposed continuously around the inner circumference of the rim, each particular protrusion of the plurality of protrusions having a protrusion length along the inner circumference, and each of the plurality of protrusions have a same length and a same peak distance. 19. The rim of claim 18, wherein a peak ratio of protrusion length divided by the peak distance is between one-hundred (“100”) and two (“2”). 20. The rim of claim 1, wherein the spoke receiving surface is an exterior surface of a spoke engaging portion. 21. A wheel for a bicycle, the wheel comprising: a central hub configured for rotational attachment to the bicycle;a plurality of spokes attached to the central hub and extending radially outward from the hub, the plurality of spokes consisting of a number of spokes; anda rim, the rim comprising: a radially outer tire-engaging portion,a first sidewall,a second sidewall spaced apart from the first sidewall, the first and second sidewalls extending radially inward of the radially outer tire-engaging portion, anda radially inner portion disposed along an inner circumference of the rim comprising a plurality of asymmetric protrusions that protrude inwardly of the rim and are formed in a radially inner surface of the radially inner portion, wherein a quantity of the plurality of asymmetric protrusions is equal to or greater than the number of spokes. 22. The wheel of claim 21, wherein the at least one asymmetric protrusion is formed asymmetrically in a circumferential direction of the rim about a radial centerline of the at least one protrusion. 23. The wheel of claim 21, wherein the radially inner surface forms a convex curve along a width of the rim at the inner circumference.
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이 특허에 인용된 특허 (5)
Jean-Pierre Mercat FR, Bicycle rim and wheel having such a rim.
Vijgen Paul M. H. W. (Hampton VA) Howard Floyd G. (Hampton VA) Bushnell Dennis M. (Wicomico VA) Holmes Bruce J. (Newport News VA), Serrated trailing edges for improving lift and drag characteristics of lifting surfaces.
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