Patent ID: 8276429
Filing Date: 2012-10-02
Classification: B25G

Abstract:
1. A hand tool comprising: a work portion adapted to interface with a workpiece; a handle connected to the work portion and including a primary user-interface, the primary user-interface receiving a force applied by a user so that the work portion can perform work on the workpiece; wherein the primary user-interface is a surface defined by a first constant radius of curvature in a first plane, a second constant radius of curvature in a second plane, and a third constant radius of curvature in a third plane; wherein the first plane is perpendicular to both the second plane and the third plane, and the second plane is perpendicular to the third plane; and wherein the first constant radius of curvature, the second constant radius of curvature, and the third constant radius of curvature are not equal.