Tool bit holder
AssigneeMilwaukee Electric Tool Corporation
InventorsMichael J. ZIMMERMANN, Xian Wei XU
Life of this patent
Estimating the term…
Abstract
A tool bit holder includes an inner sleeve in which a longitudinal bore is defined in which a tool bit is receivable and a detent is engageable with the tool bit for locking the tool bit within the longitudinal bore. An outer sleeve surrounds the inner sleeve and is movable relative to the inner sleeve between a locking position, in which the detent is engaged with the tool bit for locking the tool bit within the longitudinal bore, and a release position, in which the detent may be disengaged from the tool bit to permit removal of the tool bit from the longitudinal bore. A spring is positioned between the inner sleeve and the outer sleeve. The spring biases the outer sleeve toward the locking position
Claims23
A tool bit holder comprising:
- an inner sleeve in which a longitudinal bore is defined in which a tool bit is receivable;
- a detent engageable with the tool bit for locking the tool bit within the longitudinal bore;
- an outer sleeve surrounding the inner sleeve and movable relative to the inner sleeve between a locking position, in which the detent is engaged with the tool bit for locking the tool bit within the longitudinal bore, and a release position, in which the detent may be disengaged from the tool bit to permit removal of the tool bit from the longitudinal bore;
- and
- a spring positioned between the inner sleeve and the outer sleeve, wherein the spring biases the outer sleeve toward the locking position.
A tool bit holder comprising:
- an inner sleeve in which a longitudinal bore is defined in which a tool bit is receivable;
- a shank received in the longitudinal bore of the inner sleeve;
- first and second radial bores each extending through the inner sleeve, between an outer periphery of the inner sleeve and the longitudinal bore;
- first and second detents received, respectively, in the first and second radial bores, the first detent being engageable with the tool bit for locking the tool bit within the longitudinal bore;
- an outer sleeve surrounding the inner sleeve and movable relative to the inner sleeve between a locking position, in which the first detent is engaged with the tool bit for locking the tool bit within the longitudinal bore, and a release position, in which the first detent may be disengaged from the tool bit to permit removal of the tool bit from the longitudinal bore;
- one of a circumferential groove or a notch in an outer periphery of the shank in which the second detent is received to limit axial displacement of the inner sleeve relative to the shank to a distance less than an axial length of the circumferential groove or notch;
- and
- a spring positioned between the inner sleeve and the outer sleeve, wherein the spring biases the outer sleeve toward the locking position.
A method of operating a tool bit holder, the method comprising:
- inserting a tool bit into a longitudinal bore of an inner sleeve until a rear of the tool bit abuts a detent positioned within a radial bore through the inner sleeve;
- sliding the inner sleeve in a rearward direction relative to an outer sleeve surrounding the inner sleeve;
- compressing a spring into a retracted position with the sliding inner sleeve while the outer sleeve remains stationary;
- pushing the detent with the rear of the tool bit radially outward into a channel in the outer sleeve, permitting continued insertion of the tool bit into the longitudinal bore;
- and
- releasing the spring in response to the detent disengaging the rear of the tool bit, permitting the spring to rebound to an extended position and push the inner sleeve in a forward direction toward a locked position in which the outer sleeve displaces the detent at least partially into the longitudinal bore to prevent removal of the tool bit therefrom.
Dependencies are inferred from the claim text.