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US 6,884,037 B2Granted
Impeller assembly
AssigneeDavey Products Pty Ltd
InventorsChristopher George Lacey, Mark Andrew Lance
Life of this patent
Estimating the term…
Abstract
An impeller assembly includes an impeller which has a pair of plate means adapted for individual connection to a drive shaft for rotation by the drive shaft about an axis, and vane means disposed intermediate the pair of plate means and adapted for rotation with the pair of plate means. The impeller assembly further includes means for applying force parallel to the axis of the impeller to the impeller so as to clamp the pair of plate means and intermediate vane means together.
Claims20
An impeller assembly including:
- an impeller, the impeller including:
- a pair of plate means adapted for individual connection to a drive shaft for rotation by the drive shaft about an axis;
- and
- vane means disposed intermediate the pair of plate means and adapted for rotation with said pair of plate means;
- wherein the impeller assembly further includes means for applying force parallel to the axis of the impeller to the impeller so as to clamp the pair of plate means and intermediate van means together;
- and
- wherein the one of the plate means has an outside annular portion which is tapered such that when force is applied parallel to the axis of the impeller to clamp the pair of plate means and intermediate vane means together the taped annular portion is caused to deform against the other means plate or vane means.
4 more elements
An impeller assembly including:
- an impeller, the impeller including:
- a pair of plate means adapted for individual connection to a drive shaft for rotation by the drive shaft about an axis;
- and
- vane means disposed intermediate the pair of plate means and adapted for rotation with said pair of plate means:
- wherein the impeller assembly further includes means for applying force parallel to the axis of the impeller to the impeller so as to clamp the pair of plate means and intermediate vane means together;
- the pair of plate means and vane means having a central aperture adapted to receive the drive shaft;
- respective central apertures are keyed to the drive shaft such that each of the plate means and vane means is separately driven by the shaft;
- the drive shaft has a portion larger in diameter than the keyed portion of the shaft thereby defining a step;
- the means for applying force to the impeller is a combination of a stepped shaft, a tightening nut, and at least one of the pair of plate means;
- the pair of plate means defines respective cover plates of the impellers;
- and
- wherein one of the cover plates has an outside annular portion which surrounds the central aperture and is tapered such that when force is applied parallel to the axis of the impeller to clamp the pair of plate means and intermediate vane means together by the tightening nut, the tapered annular portion is caused to deform against the adjacent upper cover plate or vane means.
9 more elements
Dependencies are inferred from the claim text.