Patent ID: 7226347
Filing Date: 2007-06-05
Classification: A47L,B24B

Abstract:
1. An improved walk behind polisher and grinder comprising: a frame; a drive motor for rotating a central shaft, said drive motor being mounted on said frame, said central shaft being in mechanical engagement with at least one pinion shaft to rotate said at least one pinion shaft; at least one pinion gear connected to a corresponding said at least one pinion shaft end; a counter spin drive comprising an internal gear fixedly mounted to said frame, said internal gear mechanically engaging said at least one pinion gear, said at least one pinion gear traveling along said internal gear for revolving said at least one pinion shaft about said central shaft, said at least one pinion shaft rotating in a first direction about said central shaft, said at least one pinion gear rotating in a second direction opposite said first direction; and, at least one surface work tool rotated by said at least one pinion shaft, each of said at least one surface work tool being mounted to a corresponding said at least one pinion shaft; whereby said counter spin drive revolves each of said at least one pinion shaft and a cooperating one of said at least one surface work tool about said central shaft such as to resist the rotary forces resulting from each one of said at least one surface work tool.