Title:
VACUUM CLEANER MOTOR ASSEMBLY
Document Type and Number:
WIPO Patent Application WO/2005/107558
Kind Code:
A1
Abstract:
A vacuum cleaner motor assembly comprises a motor in a bucket (32), arranged to drive a fan to provide airflow. An epicyclic gear system (34) is attached to the output shaft (33) of the motor, to produce an output of reduced rotational speed. The output is employed to drive an agitator via a belt. The belt is driven at a reduced rotational speed to that achievable hitherto, and thus there is reduced wear on the belt. The provision of a gear arrangement mounted directly to the motor casing provides a compact assembly. One of the epicyclic gears, such as the ring gear (39), is arranged to slip with respect to a clutch member (41) if the agitator becomes jammed. An actuator (50) switches off the motor if the heat of friction of the slipping gear exceeds a predetermined value, or if the slipping gear rotates at a speed above a predetermined value. Thus, the motor switches off before damage occurs to any of the components of the system.
Inventors:
BURLINGTON GUY JAMES (GB)
Application Number:
PCT/GB2005/001702
Publication Date:
November 17, 2005
Filing Date:
May 05, 2005
Export Citation:
Assignee:
DYSON TECHNOLOGY LTD (GB)
BURLINGTON GUY JAMES (GB)
BURLINGTON GUY JAMES (GB)
International Classes:
A47L5/22; A47L5/30; A47L9/04; A47L9/22; F16D7/02; F16D9/02; F16D43/25; F16H1/28; (IPC1-7): A47L9/22; A47L5/22; A47L9/04
Foreign References:
| US2037648A | 1936-04-14 | |||
| GB147507A | 1921-11-08 | |||
| US5701633A | 1997-12-30 | |||
| US4357730A | 1982-11-09 | |||
| US2633597A | 1953-04-07 | |||
| US2037648A | 1936-04-14 | |||
| JP2001017358A | 2001-01-23 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 16 8 May 2001 (2001-05-08)
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30)
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 09 30 September 1996 (1996-09-30)
Attorney, Agent or Firm:
Hucker, Nerys (Dyson Technology Limited Tetbury Hil, Malmesbury Wiltshire SN16 0RP, GB)
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