Robert Boschgmbh

Gerhard Kuhlmann

Erwin Wolf

Ernst Kranzler

Gunter Wahl

Bernhard Remmele

Hansruedi Ramseier

Hans Aebi

Kurt Ruetsch

Heinz Dubach

Martin Lang

Hans Schwartz

Gerhard Baer

A hand power tool has a housing composed of at least two parts, and a plurality of connecting elements which connect the housing parts with one another at a plurality of mounting points. The housing parts are provided with a pair of tubular domes arranged at each of the mounting points and having associated passages which are arranged coaxially with one another and are formed as throughgoing passages at both sides. The connecting elements are formed by pins each extending through the passages of each of the pairs of the domes.

Hand power tool

A guide device for hand-held machine tools includes a foot plate in which a guide rail, provided with a parallel guide, can be clamped. The foot plate has guide openings in its edge portions. The guide rail is insertable into these openings. The clamping device is displaceable on the guide rail and can be clamped to the latter. The clamping device includes a clamping element with an overhanging clamping projection, which is engageable with the edge portion of the foot plate, and a clamping bolt for clamping the clamping element to the guide rail. The clamping bolt can be moved out from the narrow space between the foot plate and the machine housing and can be easily accessible.

Guide device for hand-held machine tools

In a hand-held motor-driven compass saw, the end of the reciprocating rod is connected to the end of the saw blade by means of a clamping member. The reciprocating rod has a U-shaped cross-section whereby it defines a relatively flat recess into which the end of the saw blade is inserted. The end of the reciprocating rod and the end of the saw blade are surrounded by a protective shield. The clamping member may be displaced along the end portion of the reciprocating rod from outside of the shield so as to release the clamping member or to lock it on the end of the reciprocating member when the saw blade is inserted into the recess formed in the U-shaped reciprocating rod.

Motor-driven compass saw with saw blade holder

In a compass saw formed as a hand-held machine tool a flat saw blade is connected with a flat reciprocating rod by a connecting device which comprises a cup-shaped clamping sleeve screwed on a rotary member formed with a through hole extended in the direction of elongation of the reciprocating rod the end of which is inserted into that hole. The shaft of the saw blade passes through a bore formed in the clamping sleeve and partially extends into the hole in the rotary member. Two opposing pins formed on the shaft of the saw blade limit the extension of the saw blade shaft into the hole of the rotary member. The end of the shaft is pressed against a recess formed in the reciprocating member, on the one hand, and the pins of the shaft are engaged in depressions formed in the rotary member, on the other hand, whereby clamping of the shaft of the saw blade with the end of the reciprocating rod in the clamping sleeve is ensured.

Compass saw with a connecting device for a flat saw blade

In a motor-driven hand-held saw, the end of the reciprocating rod is clamped with the shaft of the saw blade in a locking sleeve which is displaced between a locked and released position along the elongation of the reciprocating rod and is operated from outside of a protective shield which surrounds the end of the reciprocating rod and the shaft of the saw blade connected to each other by the locking sleeve.

Reciprocating saw holder and housing

A saw table for a compass saw formed particularly as a hand-held power tool, has a table plate extending so that a compass saw is located under the table plate and a saw blade extends upwardly beyond the table plate and a protecting element associated with the table plate and arranged so that from a space above the table plate the protecting element overlaps the saw blade.

Saw table for a compass saw

A guiding arrangement for a hand saw includes a support located below the saw housing, a guiding strip adjustably connected to the support and a guiding rail secured to the guiding strip. The guiding rail extends normal to the guiding strip and serves as a guide for a saw when the blade of the latter makes straight parallel cuts. The guiding rail has at least one projection formed with two openings for selectively receiving a centering pin utilized in operation when the saw blade makes circular cuts.

Guiding arrangement for a hand tool

The present relates to machine tools, such as hond drills and more particularly to control devices utilized for controlling the speed of the machine tool.

Control device in a machine tool

A tool-clamping device for a hand tool machine with a rotary drive spindle includes a tool-clamping set having an outer sleeve mounted on an inner sleeve which serves to clamp a tool to be used and a locking plate which is pivotal relatively to a housing of the tool machine to lock the outer sleeve when the latter is adjusted on the spindle to a predetermined position in an axial direction or to release the outer sleeve for enabling an operator to quickly change a tool to be used in the hand tool machine.

Tool-clamping device

A tool support for a hand tool machine includes a housing surrounding a drive spindle having a recess to receive a tool-receiving sleeve. This recess accommodates a compression spring which biases an end portion of the sleeve. The sleeve is also provided with a tool-facing portion receiving a tool to be used and an intermediate shaped portion which is arranged for a possible slidable movement within an adapter rigidly mounted to the drive spindle. A second sleeve is provided in the tool support which is threadably mounted on the tool-facing portion of the tool-receiving sleeve and is arranged so that its axial position may be adjusted. Said end portion of the sleeve has such a length that the length of contact of this end portion with the recess should be relatively larger than the combined length of contact of the shaped portion of the tool-receiving sleeve with the inner surface of the adapter and a possible path of the second sleeve in the axial direction. Such a structure provides a quick change of a tool to be used without any potential danger to an operator.

Tool support for tool machines

A switching device has a switch and an actuating member displaceable in switching on and switching off directions and tiltable in engaging and disengaging directions coordinated with one another so that when the actuating member moves in switching on direction and tilts in engaging direction it switches on the switch and is arrested, and when the actuating member moves in switching off direction and disengaging direction it is released and switches off the switch. The actuating member is tiltable about an axis located in a plane which extends between a point of connection with the spring and gripping surfaces provided on the actuating member.

Switching device

A hand-held power tool, particularly a grinding machine and the like, has a housing, a working platen movable between an inoperative position, and an operative position in which it oscillates relative to the housing, movable conduits for transporting a material removed by the working platen, and control elements for operating the power tool, wherein the control elements are located within a region which extend normal to a surface which is overlapped by the platen so that only the movable conduits extend outwardly beyond this region. The power tool is provided with a handle which is pivotable about an imaginary extension of the axis of the working platen.

Hand-held power grinding tool

A brush holder mechanism for electric motors, especially the fractional horsepower commutator-equipped motors of workshop power tools. In order to prevent failure of the tool due to jamming of the carbon brushes in their holders, the brush holder according to the invention provides that the brush holder casing in which the carbon brush moves has smooth, flat and uninterrupted interior surfaces and the casing is constructed of a single piece of metal or a single piece of metal on which a continuous cover plate is attached. The integral construction of the casing insures that the casing is not deformed during manufacture or assembly, in particular by the bending of parts of the casing into fastening tabs and the like. In the brush holder according to the invention, the fastening means are integral with the cover plate or the casing. In other embodiments, the casing is held in a receiver by clamps and screws. The electrical connection between the brush and the electrical supply cable is made by plug-in components, for example a plug-in cover plate which also provides support for the brush spring. A number of embodiments is presented.

Brush holder for fractional horsepower motors

A tool chuck, especially for holding tool bits, for example twist drills, and for use with a machine tool, in particular a portable electric drill. The chuck is so constructed as to permit secure holding of the tool bit even when used in percussion drills or impact hammer drills, while at the same time providing protection for the elastic internal element which provides axial movement. The tool chuck has a core or mandrel surrounded by a hollow conical collar which includes at least two chuck jaws and the elastic member is located between the core and the collar to apply an axial force between these two parts when the chuck is closed on a tool bit while being protected against direct exposure to the impacts sustained by the chuck jaws.

Machine tool chuck

An electric contact arrangement for wire coils of stators of electric machines, particularly stator coils of electric motors, includes an annular support member of electrically insulating material stationarily abutting one end of the stator, pin-shaped projections on the support member extending away from the stator, and metallic contact caps pressed onto the pin-shaped projections so as to clamp portions of wires respectively located intermediate the pin-shaped projections and the contact caps. Contact members arranged in the electric circuit for supplying electric current to the coils are in an electric contact with the contact caps upon assembly of the electric machine. Recesses may be provided in the support member and particularly in the pin-shaped projections in which the wires are received, and the caps may be internally corrugated to clamp the wire between the respective corrugations and the respective recess of the pin-shaped projection. The annular support member may be of at least two parts which are connected to one another by cooperating complementary projections and grooves or pins and holes.

Growing community of inventors

Stuttgart, Germany

Gerhard Kuhlmann