Title:
CLUTCH MECHANISM
Document Type and Number:
WIPO Patent Application WO/2005/107553
Kind Code:
A1
Abstract:
A clutch mechanism (10) comprises clutch members (18, 19) having an engaged position, in which torque generated by a drive is transmitted to an output and a disengaged position in which torque is not transmitted to the output. The clutch members are capable of slipping with respect to each other in order to prevent damage caused by overload conditions. The clutch mechanism further comprises an actuator (27, 28) associated with a clutch member. If the clutch members slip and a characteristic associated with slipping of the clutch members, such as a temperature rise of the slipping surfaces or the relative rotational speed of the clutch members is above a predetermined value, transmission of torque to the output is interrupted. The clutch mechanism is particularly suited for inclusion in a drive mechanism for the agitator of a surface treating appliance, such as a vacuum cleaner.
Inventors:
BURLINGTON GUY JAMES (GB)
TOWNSEND MARTIN DAVID (GB)
TOWNSEND MARTIN DAVID (GB)
Application Number:
PCT/GB2005/001723
Publication Date:
November 17, 2005
Filing Date:
May 05, 2005
Export Citation:
Assignee:
DYSON TECHNOLOGY LTD (GB)
BURLINGTON GUY JAMES (GB)
TOWNSEND MARTIN DAVID (GB)
BURLINGTON GUY JAMES (GB)
TOWNSEND MARTIN DAVID (GB)
International Classes:
A47L5/22; A47L5/30; A47L9/04; A47L9/22; F16D7/02; F16D9/02; F16D43/25; F16H1/28; (IPC1-7): A47L5/30; A47L9/04; A47L9/22; F16D43/25
Domestic Patent References:
| WO1999029223A1 | 1999-06-17 |
Foreign References:
| DE2312636A1 | 1974-09-26 | |||
| US5701633A | 1997-12-30 | |||
| US4561529A | 1985-12-31 | |||
| US2879874A | 1959-03-31 | |||
| US4660247A | 1987-04-28 | |||
| US4370690A | 1983-01-25 | |||
| DE4412986A1 | 1995-10-19 | |||
| DE19805899C1 | 1999-07-01 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 013, no. 360 (M - 858) 11 August 1989 (1989-08-11)
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30)
See also references of EP 1742557A1
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30)
See also references of EP 1742557A1
Attorney, Agent or Firm:
Hucker, Nerys (Dyson Technology Limited Tetbury Hill, Malmesbury Wiltshire SN16 0RP, GB)
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