Patent ID: 6073705
Filing Date: 2000-06-13
Classification: B25D,Y10T

Abstract:
A power-driven hammer comprisingan outer casing extending along a tool axis and defining an outside of the hammer,a main housing mounted inside said outer casing and extending along the tool axis, said main housing having an interior,a tool holder extending along the tool axis and rotatably supported in the interior of the main housing, said tool holder having a front end for receiving a tool,an operating member fitted around the tool holder and exposed to the outside of the hammer, the operating member being slidable along the tool axis and integrally rotatable with the tool holder,biasing means coupled to said operating member for biasing said operating member along the tool axis and into contact with the main housinga first engaging means provided on the operating member where the operating member comes into contact with the main housing, anda second engaging means provided on the main housing where the main housing comes into contact with the operating member, the second engaging means disposed to engage the first engaging means to prevent the operating member from rotating relative to the main housing when the operating member is brought into contact with the main housing.