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An impeller for generating an air flow, for use in a device such as a blower/vacuum, the impeller having a hub structure for mounting the impeller on a rotatable shaft of the blower/vac and a plurality of air-flow generating vanes coupled to the hub structure in a non-uniform manner wherein the spac

An impeller for generating an air flow, for use in a device such as a blower/vacuum, the impeller having a hub structure for mounting the impeller on a rotatable shaft of the blower/vac and a plurality of air-flow generating vanes coupled to the hub structure in a non-uniform manner wherein the spacing between adjacent vanes is irregular. An impeller having non-uniform spacing between adjacent vanes is provided. Additional features of the impeller may include a plurality of debris engaging structures or serrations for facilitating a finer mulch of air-entrained debris.

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An impeller for generating an air flow, for use in a device such as a blower/vacuum, the impeller having a hub structure for mounting the impeller on a rotatable shaft of the blower/vac and a plurality of air-flow generating vanes coupled to the hub structure in a non-uniform manner wherein the spac

An impeller for generating an air flow, for use in a device such as a blower/vacuum, the impeller having a hub structure for mounting the impeller on a rotatable shaft of the blower/vac and a plurality of air-flow generating vanes coupled to the hub structure in a non-uniform manner wherein the spacing between adjacent vanes is irregular. An impeller having non-uniform spacing between adjacent vanes is provided. Additional features of the impeller may include a plurality of debris engaging structures or serrations for facilitating a finer mulch of air-entrained debris. fabrication tool is a vacuum process batch fabrication tool. 6. The method of claim 2 wherein a number of substrates within the first lot of substrates, the second lot of substrates and the third lot of substrates is up to about 50. 7. The method of claim 2 wherein at least the first storage carrier and the second storage carrier are contained within a corresponding first storage pod and second storage pod positioned within the vicinity of the fabrication tool by a storage pod handling robot. 8. The method of claim 2 wherein there is transferred both of: the first lot of substrates from the first process carrier to the emptied first storage carrier; and the third lot of substrates from the third storage carrier to a third process carrier, while processing the second lot of substrates within the second process carrier within the fabrication tool for the second process time interval. 9. A method for operating a fabrication tool comprising: providing a fabrication tool which requires transfer of a lot of semiconductor substrates from a storage carrier to a process carrier when fabricating the lot of semiconductor substrates within the process carrier within the fabrication tool, the fabrication tool having associated therewith a transfer apparatus for transfer of the lot of semiconductor substrates from the storage carrier to the process carrier and an input/output station for receiving the storage carrier and positioning the same with respect to the transfer apparatus; providing a first lot of semiconductor substrates within a first storage carrier upon the input/output station; transferring, while employing the transfer apparatus, the first lot of semiconductor substrates from the first storage carrier to a first process carrier, removing the first storage carrier from the input/output station and storing the same in a storage facility provided external to the fabrication tool; processing, for a first process time interval, the first lot of semiconductor substrates within the first process carrier within the fabrication tool while: providing a second lot of semiconductor substrates within a second storage carrier upon the input/output station; transferring, while employing the transfer apparatus, the second lot of semiconductor substrates from the second storage carrier to a second process carrier; and removing the emptied second storage carrier from the input/output station and storing the same in the storage facility provided external to the fabrication tool. 10. The method of claim 9 further comprising: processing, for a second process time interval, the second lot of semiconductor substrates within the second process carrier within the fabrication tool after processing the first lot of semiconductor substrates within the first process carrier within the fabrication tool, wherein during the second process time interval at least one of: the emptied first storage carrier is returned to the input/output station, the first lot of substrates as processed is transferred thereto from the first process carrier and the first storage carrier is removed from the input/output station; and a third lot of substrates within a third storage carrier is provided upon the input/output station, the third lot of substrates is transferred to a third process carrier and the emptied third storage carrier is removed from the input/output station. 11. The method of claim 9 wherein the fabrication tool is a batch fabrication tool selected from the group consisting of wet chemical process batch fabrication tools, vacuum process batch fabrication tools and atmospheric process batch fabrication tools. 12. The method of claim 9 wherein the fabrication tool is a vacuum process batch fabrication tool. 13. The method of claim 10 wherein a number of substrates within the first lot of semiconductor substrates, the second lot of semiconductor substrates and the third lot of semiconductor substrates is up to about 50. 14. The method