Robert Boschgmbh

Eberhard Vogel

Albert Kleider

Kurt Paule

Hans Gerber

Gerhard Armbruster

Ivan Hidveghy

Klaus Dietz

Claude Wessel

Marian St/u/ Rmer

G/u/ Nter Schaal

Herbert Glaser

A portable electric device in which a surveying arrangement is incorporated for permitting a reading of the corresponding operating condition. The surveying arrangement consists of a visual reading instrument which is arranged on the casing so as to be within the range of vision and which is indicating respective characteristic data of the corresponding operating condition.

Indicating arrangement for portable electric devices

A high-speed power tool has a housing for an electromotor, and a tool casing mounted on the motor housing. A finishing plate is mounted on the tool casing for movement relative thereto. The motor drives a transmission which includes a crank member having an eccentric portion connected to the finishing plate for imparting oscillatory motion to the latter. The arrangement for connecting the eccentric portion of the crank member to the finishing plate includes a bearing mounted on the eccentric portion of the crank member, and a sleeve surrounding the bearing and detachably connected to the finishing plate. Screws which are accessible from the exterior of the tool casing and of the finishing plate connect the sleeve to the finishing plate. The transmission includes two pulleys mounted on the output shaft of the electromotor and on the crank member, respectively, the pulley on the output shaft being bipartite, the two parts of the pulley being spaced by an interchangeable washer and urged toward one another by a screw so that tension of a V-belt trained about the pulleys can be adjusted.

High-speed power tool

A hedge trimmer has at least one moveable blade and a second blade. The second blade has trapezoidal teeth. The first blade has rectangular teeth which have a broadened end portion, but, contrary to the prior art, the teeth of the first blade are at least twice as long as those of the second blade. As in the prior art hedge trimmers, the broadest part of each tooth is defined by two juncture points, one on each side of the tooth. For additional safety, in accordance with the invention, the maximum distance between adjacent juncture points of adjacent teeth is 14 mm.

Hedge trimmer

A power sander includes a casing bounding a space in which a sanding plate is mounted for cyclical motion in parallelism with a plane of a support surface of the sanding plate. A sanding element, such as sandpaper, is supported on and covers the support surface of the sanding plate, and a clamping arrangement clamps the sanding element to the sanding plate. The clamping arrangement is mounted on the sanding plate for pivoting between an engaging and an disengaging position, and is biased toward the engaging position thereof. An actuating arrangement is mounted in a transverse wall of the casing for displacement between a retracted and an extended position and is operative for abutting against and displacing the clamping arrangement toward the disengaging position thereof during the movement of the actuating arrangement toward the extended position thereof. The actuating arrangement has an actuating portion which is accessible from the exterior of the casing, and a cam portion which engages an abutment surface of the clamping arrangement during the displacement of the actuating arrangement toward the extended position. The actuating arrangement may be arrested at least in the extended position thereof to thereby retain the clamping arrangement in the disengaged position during the exchange of the sanding element. Air may be withdrawn from the space bounded by the casing so as to remove dust resulting from the sanding operation from the vicinity of the sanding plate.

Power sander

Growing community of inventors

Dettenhausen, Germany

Eberhard Vogel