Patent ID: 7311155
Filing Date: 2007-12-25
Classification: B25F

Abstract:
1. A pneumatic tool operable with a single hand, with the pneumatic tool comprising: a shell defining a first chamber and a second chamber, with the second chamber comprising an intake aperture in communication with a portion of the first chamber and an outlet aperture in communication with another portion of the first chamber; a cylinder positioned in the first chamber; a controller movable in the second chamber between a first position and a second position, wherein the controller comprises a first groove and a second groove so that in the first position, the first groove communicates with the intake aperture in order to direct pressurized air to drive the cylinder in a first direction, and that in the second position, the second groove communicates with the intake aperture in order to direct pressurized air to drive the cylinder in a second direction; a cover for sealing the first chamber and the second chamber, with the cover defining an opening through which the controller extends from the second chamber so that the controller can be moved; and a lever connected to the controller and installed on the cover so that the lever is operable by the thumb between a first position corresponding to the first position of the controller and a second position corresponding to the second position of the controller, wherein the controller is moveable in an axial direction between the first and second positions, wherein the lever is pivotally installed on the cover about a pivot axis perpendicular to the axial direction, wherein the first and second grooves both comprise an intake end for communication with the intake aperture and an outlet end for communication with the outlet aperture, wherein the intake end of the first groove is spaced from the intake end of the second groove by a distance smaller than the diameter of the intake aperture of the second chamber, wherein the outlet end of the first groove is spaced from the outlet end of the second groove by a distance smaller than the diameter of the intake aperture of the second chamber.