Patent ID: 7216749
Filing Date: 2007-05-15
Classification: B25D

Abstract:
1. A clutch for a rotary power tool having a housing, a spindle rotatably mounted within the housing, and a motor for causing rotation of said spindle about a first axis, the clutch comprising: a first clutch member adapted to be mounted to said spindle and to rotate therewith and slide relative thereto in a direction substantially parallel to said first axis, said first clutch member having at least one first friction surface inclined in use relative to said first axis for engaging a respective corresponding second friction surface on said spindle as a result of movement of said first clutch member relative to the spindle; first biasing means adapted to act between said spindle and said first clutch member for biasing said first clutch member towards a stop; a second clutch member having a first condition in which said second clutch member engages said first clutch member and rotates therewith, and a second condition in which said second clutch member can move relative to said first clutch member; and second biasing means adapted to act between said first and second clutch members for urging said second clutch member towards said first condition.