US 11,938,585 B1
Sander apparatus and method
Michael E. McConville, Stratford (CA)
Assigned to Stringtech Workstations Inc., Harrow (CA)
Filed by Stringtech Workstations Inc., Harrow (CA)
Filed on Oct. 28, 2021, as Appl. No. 17/513,089.
Claims priority of provisional application 63/106,963, filed on Oct. 29, 2020.
Int. Cl. B24B 45/00 (2006.01); B24B 27/00 (2006.01); B24B 27/02 (2006.01); B24B 41/00 (2006.01); B24B 41/02 (2006.01); B24B 41/04 (2006.01); B24B 41/047 (2006.01); B24D 9/04 (2006.01); B24D 9/08 (2006.01); B24B 11/10 (2006.01); B24B 19/26 (2006.01)
CPC B24B 41/04 (2013.01) [B24B 27/0015 (2013.01); B24B 41/002 (2013.01); B24B 41/02 (2013.01); B24B 41/047 (2013.01); B24B 45/006 (2013.01); B24D 9/04 (2013.01); B24D 9/08 (2013.01); B24B 11/10 (2013.01); B24B 19/26 (2013.01); B24B 27/02 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A sander apparatus for abrasion of a workpiece, the sander apparatus being configured for use with a drill press having a chuck defining a drill chuck axis, the sander apparatus comprising:
a base assembly comprising:
a base body;
a central bearing mounted in the base body, the central bearing defining an aperture therein;
at least one load bearing mounted on the base body;
a sander assembly comprising:
a body element defining a disc having a top surface, an opposed bottom surface, and an edge surface that is located transverse to the top and bottom surfaces;
a pin subassembly centrally positioned in the body element and secured to the body element, the pin subassembly being defined by a central pin axis, the pin subassembly comprising:
an upper shaft securable in the chuck to align the central pin axis with the chuck axis and extending from the top surface, and
a lower shaft receivable in the aperture for engagement of the lower shaft with the central bearing to allow rotation of the lower shaft about the central pin axis;
a primary sandpaper element, secured to the top surface;
a secondary sandpaper element secured to the edge surface;
the base assembly being formed to locate the sander assembly in a predetermined location relative to the chuck such that the upper shaft is securable in the chuck wherein, when the upper shaft is secured in the chuck, rotation of the chuck about the drill chuck axis causes corresponding rotation of the body element about the central pin axis; and
said at least one load bearing engaging the bottom surface, to support the sander assembly in the predetermined location against vertically-directed force to which the sander assembly is subjected when the workpiece is urged at least partially downwardly against the primary sandpaper element; and
the central bearing being configured to engage the lower shaft, to support the sander assembly in the predetermined location against horizontally-directed force to which the sander assembly is subjected when the workpiece is urged at least partially transversely against the secondary sandpaper element relative to the central pin axis.