Abrading tool suction system
AssigneeHutchins Manufacturing Company
InventorDonald H. Hutchins
Life of this patent
Estimating the term…
Abstract
A portable abrading tool having a shoe which is driven relative to a carrying body by a contained air motor to perform an abrading operation, and in which a flow of air discharged from the motor passes through a conduit structure projecting from an end wall of the tool body, with the body having a flange projecting therefrom beneath the conduit structure and carrying at its underside a seal part slidably engaging the shoe structure to deliver air and abraded particles from a passage in the shoe through the seal part and upwardly through a connected secondary conduit for delivery into the primary stream from the motor, in an aspirator relation inducing the secondary flow by the energy of the primary stream.
Claims14
A portable abrading tool comprising:
- a body to be held by a user;
- a shoe structure adapted to carry a sheet of abrading material and mounted to the underside of said body for abrading movement relative thereto, and containing passage means through which air and abraded particles are drawn from near the shoe structure;
- an air motor in said body for driving the shoe relative to the body;
- said body having an end surface facing in generally a predetermined direction, and said body having a flange projecting in said direction beyond said end surface at a location near but above said shoe structure;
- a conduit structure carried by said body and into which a primary flow of air discharged from said motor passes, said conduit structure projecting from said body in said predetermined direction and beyond said end surface at a location spaced above said flange;
- a seal part carried at the underside of said flange and free for slight upward and downward movement relative thereto and relative to said conduit structure and containing a passage communicating with said passage means in the shoe structure to receive air and particles therefrom;
- said seal having an undersurface slidably engaging an upper surface of said shoe structure about said passage means and said passage to form a seal therebetween as the shoe structure moves relative to the flange and seal part;
- additional conduit means extending upwardly from said seal part past said flange and connected to said first mentioned conduit structure;
- said conduit structure forming at the upper end of said additional conduit means an aspirator by which said primary flow of air induces a secondary flow of air and particles from said shoe structure and through said additional conduit means for intermixture with and discharge with the primary flow.
Dependencies are inferred from the claim text.