Black Decker Inc.

Karl Schmid

Horst Grossmann

Ernst Staas

Ulrich Berghauser

Hans-Jurgen Kriegel

Manfred Merkator

Gert Eichberger

Rolf Meier

A handheld powered planer is provided with a receiving chamber (25) with a chips redirecting surface (51) next to the drum compartment (18) for the cutter drum (15). The receiving chamber (25) is connected via an inlet opening (28) to the drum compartment (18) and via a lateral outlet opening (26, 27) to the outside. The chips redirecting surface (51) is inclined in an ascending manner in the direction of the outlet opening. Air passage openings (53) are located in the inclined chips redirecting surface (51) and are connected via an air channel (30) to the motor compartment (19) of the planer housing (1) so that an air flow from the fan wheel (11) of the drive motor (8) passes through the air passage openings (53) and flows in the direction of the outlet openings (26, 27). Chip removal is significantly improved as a result of this.

Planar chip ejection cassette

A power saw has two oppositely reciprocating saw blades guided and supported in a receiving slot in a support plate. The blades are supported during sawing along shoulders on their outside by lower edges of support sections of the support plate. The arrangement is such that forces generated in operation during cutting press the saw blades together in the area of their teeth. This prevents saw dust, chippings etc. penetrating between the two saw blades. Preferably, the thickness of the saw blade shoulders are not greater than half the thickness of the saw blades, and preferably no greater than the thickness of the support section edges. The teeth of the saw blades may be so ground and arranged that the resultant force on the teeth during cutting also forces the saw blades together at their teeth.

Power driven saw with reciprocating saw blades

An electro-magnetic tacker, which can carry out a limited number of driving strokes when its main switch is actuated, has a staple magazine pivotal between a blocking position and an operating position. In the operating position of the staple magazine, a staple blocking member blocks the front staple located in the staple magazine and, in the blocking position of the staple magazine, releases this staple for entry into a staple output channel. A coupling element connected to the staple magazine has an engagement portion which, in the switched-on position of an actuator element of the main switch, is in engagement with this. In this switched-on position, the actuator element holds the staple magazine in the operating position via the coupling element, so that the tacker can be lifted off from a workpiece, while at the same time the operating position of the staple magazine and the blocking action of the staple blocking member are maintained.

Electro-magnetic tacker

A power tool having a plastics material housing and a power output spindle is provided with a tube-like metal member in the front end of the housing. A bearing is received within the tube-like member for supporting the spindle. The tube-like member has at the front end thereof radially outwardly extending tabs for dissipating heat therefrom. The tabs are preferably partially embedded in the plastics material of the front end of the housing for anchoring the member therein, alternate tabs preferably being angled rearwardly. The member may also support ratchet teeth of a hammer drill. A fan may be mounted on the spindle in the region of the front end of the member for facilitating dissipation of heat from the radial tabs.

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Idstein, Germany

Karl Schmid