Brushing – scrubbing – and general cleaning – Machines – With air blast or suction
Patent
1991-02-15
1992-11-24
Moore, Chris K.
Brushing, scrubbing, and general cleaning
Machines
With air blast or suction
15391, A47L 900
Patent
active
051651408
ABSTRACT:
A belt drive train particularly useful for driving the beater bar of a vacuum cleaner. The drive train includes a driven shaft preferably driven by a motor, a drive shaft preferably connected to a beater bar and including a driven pulley, and an inelastic belt coupling the drive shaft to the driven shaft. Both the drive shaft and the driven shaft are supported on bearings. At least one of the bearing is mounted in a deflecting bearing mount so that the shaft supported by the bearing can be moved relative to the housing. As a result of this construction, the drive shaft and the driven shaft can be moved closer to one another to allow the inelastic belt to be passed over the drive shaft and the driven shaft. The elasticity of the deflecting bearing mount then causes a belt tension sufficient to allow the drive shaft to drive the driven shaft through the belt. The drive train can also include one or more self aligning sleeve bearings to compensate for the unbalanced belt tension force. The sleeve bearings include a shaft support surface, an outer periphery and a deflecting element supporting the shaft support surface on the outer periphery.
REFERENCES:
patent: 3107955 (1963-10-01), Trumpler
patent: 3855666 (1974-12-01), Erikson et al.
patent: 4360950 (1982-11-01), Miller
patent: 4375117 (1983-03-01), Lyman
patent: 4496251 (1985-01-01), Ide
patent: 4676668 (1987-06-01), Ide
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