A dustless sander has a sanding body with a flat front face. Two exhaust openings open into the back face of the sanding body. Each is associated with a series of vacuum passages that radiate from the exhaust opening. Inlet openings through the front face communicate with the exhaust openings and the vacuum passages. The inlet openings communicating directly with the exhaust openings are smaller in diameter than the inlet openings communicating with the vacuum passages. The sander is equipped with a sanding pad consisting of several layers of fibreglass screen secured together by a bonding material around the edge. This is laid over the front face of the sander and is held in place by an open mesh abrasive sheet clamped to the sander. A hollow handle communicated with the exhaust openings and is connected, through a flexible hose and a rotary joint, to a vacuum source, such as shop vacuum.
A hand or automatically vibrating sander head is connected to a vacuum system and defines an air flow intake pattern on a plate in order to efficiently and conveniently provide for the disposal of sanding remains.
A grinding member attachable to a grinding disc, an attachment plate of a grinding machine, or a manual holder, and including an abrasive-containing layer, and a perforation substantially uniformly distributed over at least a portion of a surface of the abrasive-containing layer and extending through an entire thickness of the abrasive-containing layer, with the perforation being formed of a plurality of openings so spaced from each other that unhindered suction of abrasive dust is insured; and adapter for attaching the grinding member.
A manual sanding tool has a block for holding a sheet of sand paper and a housing which may be attached to the block. The block has two ridges, each with a convex top surface. The two ridges are proximate opposed sides of the block; a shaft projects from the block inwardly of, and adjacent to, each ridge. An inverted box shaped member associated with each ridge has an elongate slot which receives the shaft such that the box member may be wiped over the top of the ridge to a position on the back surface of the block. In wiping over the top surface of the ridge, the box shaped member pulls on the end of any sandpaper between it and the ridge in order to tighten the sandpaper on the block. A nut may then secure the box shaped member in place on the back surface of the ridge. A passageway through a clip attached to the housing may receive a smaller diameter hook. The hook terminates in a socket for receiving a pole. This arrangement forms a reach extension for the tool with the hook and larger diameter passageway acting as a universal joint.
Sanding apparatus in which dust raised by sanding is drawn by reduced pressure through a porous sanding sheet and directly through apertures into a plenum chamber and from there through an air passage into an air space in a closed container partially filled with water. The air and dust are separated in the container by projecting the dust into the water from a small distance above it and, simultaneously, drawing the substantially dust-free air out of the air space by the reduced pressure so that the air does not need to enter the water.
Current pole mounted vacuum sanders have universal connections between the pole and sander which permit the sanding pad to lift off the sanding surface when pressure is applied. The present invention provides a universal connection between the pole and base of the vacuum hand sanding device which allows the head to be semi-locked into position when the pole is angled to the working surface to prevent the pad lifting from the surface.
