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1. (WO2019027875) CHAINRING
PCT Biblio. Data
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Pub. No.:
WO/2019/027875
International Application No.:
PCT/US2018/044319
Publication Date:
07.02.2019
International Filing Date:
30.07.2018
IPC:
B62M 9/08
(2006.01)
B
PERFORMING OPERATIONS; TRANSPORTING
62
LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
M
RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
9
Transmissions characterised by use of an endless chain, belt, or the like
04
of changeable ratio
06
using a single chain, belt, or the like
08
involving eccentrically-mounted or elliptically-shaped driving or driven wheel; with expansible driving or driven wheel
Applicants:
BROWN, JR, Douglas Gilman
[US/US]; US
Inventors:
BROWN, JR, Douglas Gilman
; US
Agent:
LUDWIG, Mary Frances
; US
Priority Data:
62/538,917
31.07.2017
US
Title
(EN)
CHAINRING
(FR)
PLATEAU DE PÉDALIER
Abstract:
(EN)
A chainring that provides variable mechanical advantage and gear torque multiplication includes a first peripheral region and a second peripheral region which are offset in opposite directions from a top dead center point. The chainring radius to the second peripheral region is less than the radius to the first peripheral region. Embodiments of the chainring connect to a crank assembly so that the first peripheral region engages the chain during the power phase of a first crank arm rotation and the second peripheral region engages the chain during the power phase of a second crank arm rotation. These features provide increased mechanical advantage during the power phase of the second crank arm rotation compared to the first crank arm, enabling a rider to rest one leg while maintaining a high pedaling cadence. Other embodiments are useful as a motorcycle sprocket.
(FR)
L'invention concerne un plateau de pédalier qui fournit un gain mécanique variable et une multiplication de couple d'engrenage, lequel plateau de pédalier comprend une première région périphérique et une seconde région périphérique qui sont décalées dans des directions opposées d'un point de point mort haut. Le rayon de plateau du pédalier jusqu'à la seconde région périphérique est inférieur au rayon jusqu'à la première région périphérique. Des modes de réalisation du plateau de pédalier sont reliés à un ensemble manivelle de telle sorte que la première région périphérique entre en prise avec la chaîne pendant la phase de puissance d'une première rotation de bras de manivelle et que la seconde région périphérique entre en prise avec la chaîne pendant la phase de puissance d'une seconde rotation de bras de manivelle. Lesdites caractéristiques offrent un gain mécanique accru pendant la phase de puissance de la seconde rotation du bras de manivelle par rapport au premier bras de manivelle, permettant à un motocycliste de laisser reposer une jambe tout en maintenant une cadence de pédalage élevée. D'autres modes de réalisation sont utiles en tant que pignon de moto.
Designated States:
AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language:
English (
EN
)
Filing Language:
English (
EN
)