The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 24, 1996
Filed:
Dec. 30, 1994
Toshimitsu Hashii, Clemson, SC (US);
Robert G Everts, Chandler, AZ (US);
Ryobi Motor Products, Easley, SC (US);
Abstract
An oscillating spindle sander having a spindle rotatably mounted in a cabinet. An external end of the spindle is adapted to receive a sanding drum. An upper cam pulley is fixedly attached to the spindle and a lower cam pulley is rotatably attached to the spindle within the cabinet. The upper and lower cam pulleys have face-to-face annular cam surfaces having complementary sinusoidal contours with diametrically opposite lobes and diametrically opposite valleys. The upper and lower cam pulleys have a toothed rim connected by individual drive belts to a common drive pulley rotated by an electric motor. The number of teeth on the toothed rims of the upper and lower cam pulleys are different, causing the upper and lower cam pulleys to rotate relative to each other. The annular cam surfaces cause the upper cam pulley and the spindle to be oscillated in a vertical direction in response to the relative rotation between upper and lower cam pulleys.