Patent ID: 7861418

Claim:
A reciprocatory saw comprising a pitman for performing a reciprocatory motion during operation and on whose bottom end a chuck means is arranged for the releasable clamping of a shank of a saw blade which projects, in the mounted state, downwardly out of the chuck means, said saw blade being able to be inserted upwardly, in a longitudinal direction, into the chuck means and to be removed downwardly out of the chuck means, wherein the chuck means comprises a movably mounted chuck jaw arrangement able to be clamped against a side of the saw blade shank, a wedge element arrangement for cooperation with the chuck jaw arrangement and provided externally adjacent to the chuck jaw arrangement, the wedge element arrangement being provided with at least one stationary guide track and an actuating element able to be operated from the outside so that the wedge element arrangement can be shifted along the at least one guide track out of its chucked position into a release position, the at least one guide track being arranged on a stationary outer sleeve encircling the wedge element arrangement and being constituted by a guide slot extending outwardly through a wall of the outer sleeve, each guide slot having a guide projection projecting from the wedge element arrangement and supported in the guide slot, a first spring means having a spring force acting downwardly on the wedge element arrangement, the wedge element arrangement being connected with the chuck jaw arrangement in a manner for the transmission of rotary movement and from the outside is able to be shifted between a bottom clamping position clamping the chuck jaw arrangement inwardly against the saw blade shank and a top release position freeing the chuck jaw arrangement, in which the wedge element arrangement assumes an angular position turned in rotation to the clamping position and is seated on a holding face holding the wedge element arrangement in the release position, a stationary abutment face being present, which is associated with an abutment arrangement on the saw blade shank so that, when the saw blade shank is clamped, the abutment arrangement is held by the first spring means in a downward direction against the abutment face and when the wedge element arrangement and the chuck jaw arrangement are in the turned release position, it can be shifted past the abutment face.