| 摘要 |
A portable grinder having a vacuum hood enclosing the grinder disc. The hood has a wall of stiff bristles surrounding the periphery of the disc for engaging the surface being ground to permit air to flow through the bristles into the hood and to confine the dust particles inside the hood. The bristles are effectively spring biased to project the bristles forward of the disc to engage the surface before the disc to set up a vacuum in the hood before the grinding begins and after the grinding stops. While the disc is grinding the surface the bristles are biased against the surface to maintain the vacuum. A section of the hood may be removed to enable the disc to reach right up to an intersecting wall or surface.
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