Patent ID: 6666283
Filing Date: 2003-12-23
Classification: B25B,B25D,B25F

Abstract:
A hand power tool, comprising at least one safety coupling arranged in a drive train, said safety coupling having at least two coupling elements for transmitting a torque around a rotary axis; at least one arresting element which is spring loaded and held in a guiding passage for connecting said coupling elements with one another; a guiding element; a spring providing spring-loading of said arresting element and supported in direction of said arresting element by said guiding element, said guiding element being non rotatably guided relative to an axis extending parallel to said rotary axis by guiding surfaces in said guiding passage, and said arresting element unlatching and keeping in contact with a surface toward which said arresting element is urged, during latching, by said spring in response to exceeding of predetermined torque; and means for guiding said spring at an end facing away from said guiding element and including a short recess, said recess having a smaller diameter than said guiding passage and also having guiding surfaces extending parallel to a moving direction of said guiding element, said recess being formed so that it supports said spring to keep a distance to side walls of said guiding passage for reducing friction and wear of said spring.