Hilti Aktiengesellschaft

Josef Anzinger

Erwin Manschitz

Helmut Burger

Uto Plank

Christian Koschel

Harald Geiger

Armin Below

Manfred Ege

Mathias Doberenz

Sarah Harder

A hand-held electrical combination hammer drill capable of being used both as a drilling hammer and as a chisel hammer, and including an actuation member () for actuating an electrical on-off switch of the hammer drill and located on the tool handle switching elements () for switching between drilling and chiseling operations, stop elements () actuated by the switching means () for retaining the actuation member () in a on-position of the on-off switch upon selection of the chiseling operation, and a stop switch () having, upon selection of the chiseling operation, a first position in which the stop switch provides for securing the actuation member () in its on-position with the stop elements (), and a second position in which the stop elements occupies a non-operative position in which the actuation member, upon being released, automatically moves into its off-position under an action of a biasing force.

Hand-held electrical combination hammer drill

A chuck for a percussion hand-held power tool including a coupling sleeve ( ) for receiving a working tool and having two diametrically opposite, slot-shaped, radial openings ( &prime;) in which two locking members ( ) radially and axially displace a locking sleeve surrounding the coupling sleeve ( ) and the locking members ( ), and a spring-biased push-sleeve ( ) formlockingly cooperating with the locking members ( ), with the locking members ( ) being supported against the inner surface ( ) of the locking sleeve ( ), extending into an interior of the coupling sleeve ( ), and having each a radial dimension greater than a thickness of the coupling sleeve wall and a width decreasing toward a chuck axis (A).

Chuck for a percussion hand-held power tool

A hand-held electrical combination hammer drill capable of being used both as a drilling hammer and as a chisel hammer, and including an actuation member ( ) for actuating an electrical on-off switch of the hammer drill and located on the tool handle switching elements ( ) for switching between drilling and chiseling operations, stop elements ( ) actuated by the switching means ( ) for retaining the actuation member ( ) in a on-position of the on-off switch upon selection of the chiseling operation, and a stop switch ( ) having, upon selection of the chiseling operation, a first position in which the stop switch provides for securing the actuation member ( ) in its on-position with the stop elements ( ), and a second position in which the stop elements occupies a non-operative position in which the actuation member, upon being released, automatically moves into its off-position under an action of a biasing force.

A chuck for drilling and chiseling tools and including a receiving sleeve at least one through-opening formed in a sleeve wall at least one locking member supported for a limited pivotal movement about a pivot axis, which extends substantially perpendicular to a longitudinal axis of the receiving sleeve, and projecting at least partially into the through-opening (12) of the sleeve with the locking member (6) extending in its locking position through the through-opening (12) into a receiving sleeve inferior, a guide ring surrounding the receiving sleeve and at least partially overlapping the locking member (6) in its locking position, preventing the locking member (6) from pivoting into its release position and an actuation sleeve (7) displaceable in a direction opposite to an operational direction of the tool against a spring-biasing force for enabling pivoting of the locking member (6) into the release position, with the locking member (6) being pivotally connected with the actuation sleeve (7).

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Munich, Germany

Josef Anzinger