CPC E02F 5/08 (2013.01) [B23D 45/10 (2013.01); B23D 59/025 (2013.01); B23D 61/026 (2013.01); B28D 1/045 (2013.01); B28D 1/18 (2013.01); B28D 7/02 (2013.01); E02F 3/188 (2013.01); E02F 5/10 (2013.01); E02F 5/101 (2013.01); E02F 5/12 (2013.01); E02F 5/145 (2013.01); E02F 7/02 (2013.01); E02F 9/00 (2013.01); F16L 1/028 (2013.01); F16L 1/032 (2013.01); H02G 1/06 (2013.01)] | 20 Claims |
1. A blade assembly for working on a work surface or structure, the blade assembly comprising:
a first blade, a second blade, and a third blade, wherein the first blade, the second blade, and the third blade are axially aligned relative to a center;
a first spacer structure configured to space apart the first blade and the second blade; and
a second spacer structure configured to space apart the second blade and the third blade;
wherein the first spacer structure comprises a first sidewall and a second sidewall that form a first spacer compartment between the first blade and the second blade;
wherein, extending radially from the center, the first spacer compartment widens due to the first sidewall and the second sidewall diverging for a first radial distance and then the first spacer compartment narrows due to the first sidewall and the second sidewall converging for a second radial distance;
wherein the first spacer compartment is aligned with an inlet in the first blade or the second blade.
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