Patent ID: 7625264
Filing Date: 2009-12-01
Classification: B24B

Abstract:
1. A pneumatic dry wall sander, which is comprised of: a. a handle; wherein a handle of a predetermined shape is provided; wherein tubing is provided in the handle for an air supply line; wherein dust exhaust tubing is provided in the handle; b. extension members; wherein extension members may be attached to the handle; said extension members provide air supply tubing and dust exhaust tubing; wherein the air supply tubing in the extension members aligns with the air supply tubing in the handle; wherein the dust exhaust tubing aligns with the dust exhaust tubing in the handle; c. impeller casing; wherein an impeller casing for a sander is provided; wherein the impeller casing is of a predetermined shape; d. a pneumatic motor; wherein a pneumatic motor is mounted to the top of the sander; e. air supply; wherein a supply of compressed air is provided; wherein an air supply line is connected to the air supply source; wherein the air supply can be adjusted; said air supply operates the pneumatic motor; f. gimbal housing; wherein a gimbal housing is provided; wherein the motor is secured to the gimbal housing; wherein a plurality of pivot pins are provided; said gimbal housing allows the sander to tilt; g. central drive shaft; wherein the central drive shaft has a first end and a second end; wherein the first end is secured to the pneumatic motor; wherein the second end secured the sanding disc; wherein internal threads are provided on the end of the central drive shaft to secure the sanding disc; h. impeller blade assembly; wherein an impeller blade assembly is provided; wherein the impeller blade assembly will be covered by the casing for the sander; wherein a series of impeller blades is provided; wherein an opening is provided in the impeller blade assembly; wherein a bearing is placed in the center of the impeller blade assembly; wherein the central drive shaft passes through the bearing in the impeller blade assembly; i. external drive shaft; wherein an external drive shaft is secured to one end to the impeller bearing; said external drive shaft surrounds the central drive shaft; wherein a keyway is located on one end of the external drive shaft; j. a mounting plate; wherein an opening in the center of the mounting plate is provided; wherein the external drive shaft passes through the opening in the mounting plate; wherein the mounting plate is secured to the underside of the casing; wherein the mounting plate has a predetermined shape; wherein the mounting plate partially covers the impeller blade assembly; k. gear housing; wherein a gear housing is provided; wherein a stationary gear is mounted to the side of the interior of the gear housing; wherein the gear housing is secured to the mounting plate; wherein a second gear housing plate is provided; k. upper horizontal drive gear; wherein an upper horizontal drive gear is attached to the external drive shaft; wherein the teeth on the upper horizontal drive gear mesh with the teeth on the stationary gear; l. lower horizontal drive gear; wherein a lower horizontal drive gear is attached to the central drive shaft; wherein the teeth on the lower horizontal drive gear mash with the teeth of the stationary gear; m. means to connect the lower horizontal drive gear to the external drive shaft; n. sanding disc; wherein a sanding disc is provided; wherein the sanding disc is of a predetermined shape; wherein a means to secure the sanding disc is provided; o. brushes; wherein a plurality of brushes are secured to the casing; wherein the brushes completely surround the perimeter of the casing; p. dust exhaust port; wherein a dust exhaust port is provided; said dust exhaust port is part of the impeller casing; wherein dust tubing is provided; said tubing is secured to the exhaust port.