Cutlery – Combined cutlery or combined with ancillary feature – With material-holder or disposal
Patent
1991-04-26
1991-12-24
Watts, Douglas D.
Cutlery
Combined cutlery or combined with ancillary feature
With material-holder or disposal
30390, 125 1301, B26B 2500
Patent
active
050740440
ABSTRACT:
An attachment is provided for a saw or other power tool having a rotary shaft and a circular blade mounted on the shaft. A substitute saw blade guard is fastened on the saw housing to define a dust confining channel about the periphery of a portion of the circular rotary saw blade. A shaft extension is fastened to the exposed tip of the shaft and an impeller is fastened to the shaft extension outside of the dust confining channel. A bonnet with an internal dust transfer passageway is secured relative to the dust guard to confine the impeller within an impeller enclosure. Operation of the rotary blade causes the impeller to rotate to create a suction, thereby drawing air and dust from the channel about the periphery of the rotary blade and into the vortex created at the axial center of the impeller. The impeller discharges air laden with dust from a discharge outlet in the impeller bonnet.
REFERENCES:
patent: 3332148 (1967-07-01), Aulerich et al.
patent: 3481036 (1969-07-01), Slaughter
patent: 4414743 (1983-11-01), Pioch et al.
patent: 4422239 (1983-12-01), Mair
patent: 4675999 (1987-06-01), Ito et al.
Duncan C. Warren
Glynn William D.
Thomas Charles H.
Watts Douglas D.
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