Patent ID: 11878355
Assignee: BLACK & DECKER, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  Y | IPC B

Claim 12:
13. A power tool comprising:
a housing;
a motor received in the housing;
a switch configured to selectively actuate the motor;
an output shaft extending along a longitudinal axis and configured to be rotationally driven by the motor, the output shaft having a front end;
a chuck configured to be coupled to the output shaft, the chuck including a body extending along the longitudinal axis and having a nose portion and a tail portion, a central bore defined in the body and open to the nose portion, the central bore extending along the longitudinal axis and configured to receive a tool bit, a plurality of angled passageways defined in the body in communication with the central bore, with each passageway disposed at an acute angle to the longitudinal axis, and a plurality of jaws, each jaw at least partially received in one of the passageways, a rear end of at least one of the jaws lying in a first plane transverse to the longitudinal axis, the jaws moveable in the passageways between an axially forward and radially inward clamping position to clamp the tool bit received in the central bore, and an axially rearward and radially outward retracted position; and
a first key drive member coupled to the tail portion of the body and a second key drive member coupled to the output shaft, the first and second key drive members configured to engage each other to non-rotationally couple the body to the output shaft so that rotation of the output shaft causes rotation of the body,
wherein the first key drive member extends from a rearward end to a forward end that lies in a second transverse plane transverse to the longitudinal axis,
wherein the second plane is axially forward of the first plane when the jaws are in the retracted position, and
wherein each passageway is open to the tail portion of the body.