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1. (WO2005036009) CLUTCHES INCLUDING A MAGNETO-RHEOLOGICAL FLUID
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2005/036009 International Application No.: PCT/GB2004/004297
Publication Date: 21.04.2005 International Filing Date: 08.10.2004
IPC:
F16D 37/02 (2006.01)
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16
ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
D
COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
37
Clutches in which the drive is transmitted through a medium consisting of small particles, e.g. centrifugally speed-responsive
02
the particles being magnetisable
Applicants: WHEALS, Jonathan[GB/GB]; GB (UsOnly)
TURNER, Andrew[GB/GB]; GB (UsOnly)
RAMSAY, Keith[GB/GB]; GB (UsOnly)
HEY, James, Michael[GB/GB]; GB (UsOnly)
RICARDO UK LIMITED[GB/GB]; Bridge Works Shoreham-by-Sea West Sussex BN43 5G, GB (AllExceptUS)
Inventors: WHEALS, Jonathan; GB
TURNER, Andrew; GB
RAMSAY, Keith; GB
HEY, James, Michael; GB
Agent: JENNINGS, Nigel, Robin ; Kilburne & Strode 20 Red Lion Street London WC1R 4PJ, GB
Priority Data:
0323579.308.10.2003GB
Title (EN) CLUTCHES INCLUDING A MAGNETO-RHEOLOGICAL FLUID
(FR) EMBRAYAGES COMPRENANT UN FLUIDE MAGNETO-RHEOLOGIQUE
Abstract:
(EN) A clutch for transmitting torque between two rotary shafts (6, 8) comprises a first clutch plate (2), which is opposed to a second clutch plate (4). The two clutch plates are accommodated within a housing (10) and define a gap. The interior of the housing accommodates a magneto-rheological fluid, at least some of which is within a gap. The clutch includes a first electromagnetic coil (26) which is so arranged that, when it is energised, it produces an electromagnetic field in the vicinity of the gap and causes the fluid to occupy the gap. The electromagnetic field causes the viscosity of the fluid to increase and thus in torque being transmitted between the two clutch plates. The clutch also includes a second electromagnetic coil (28) arranged so that when it is energised the fluid is caused to move out of the gap, whereby no torque is transmitted between the two clutch plates.
(FR) L'invention concerne un embrayage conçu pour transmettre un couple entre deux arbres rotatifs (6, 8), qui comprend une première plaque d'embrayage (2) opposée à une seconde plaque d'embrayage (4). Les deux plaques d'embrayage sont logées dans un boîtier (10) et définissent un espace. L'intérieur du boîtier renferme un fluide magnéto-rhéologique dont au moins une partie se trouve dans un espace. L'embrayage comporte une bobine électromagnétique (26) qui est disposée de façon que, lorsqu'elle activée, elle produit un champ électromagnétique à proximité dudit espace et amène le fluide à remplir cet espace. Le champ électromagnétique fait augmenter la viscosité du fluide et, par conséquent, dans le couple qui se transmet entre les deux plaques d'embrayage. L'embrayage comprend également une seconde bobine électromagnétique (28) disposée de façon que, lorsqu'elle activée, le fluide sort de l'espace et, ainsi, aucun couple ne se transmet entre les deux plaques d'embrayage.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)