Black Decker Inc.

Ralf Bernhart

Achim Buchholz

Ernst Staas

Martin Soika

Michael Stirm

Klaus-Dieter Arich

Andreas Hanke

Bruno Meinholf Ruethers

Norbert Hahn

Rainer Herting

Thomas Michael Stanke

Rosi Wache, Legal Representative

Brono Ruethers

Ernst Stass

A power tool is provided including a motor housing; a transmission housing disposed adjacent the motor housing with a gap therebetween; an electric motor including a rotor and a stator mounted within the motor housing; and an intermediate housing disposed between the electric motor and the transmission mechanism. The intermediate housing includes a back wall extending radially adjacent an axial end of the stator and having a through-hole therein through which the motor spindle extends; side walls extending axially from an outer circumference of the back wall internally of the motor housing; and one or more external walls extending substantially-radially outwardly from axial end of the one or more side walls to fill a gap formed between the transmission housing and the motor housing in the axial direction.

Power tool having an intermediate housing

A range of power tools each includes motor and transmission housings with an electric motor and a transmission mechanism mounted respectively therein, with the transmission mechanism using the rotary output of the motor to drive a cutting tool. An intermediate housing is sandwiched between the motor and transmission housings. Each of the motor housings is the same in shape, and the length of the electric motors in each of the power tool is different to the length of the electric motors in the other power tools in the range. The transmission housing is positioned differently relative to the motor housing in each power tool to accommodate the difference in length in the electric motor in that power tool, the shape of the intermediate housing in each power tool varying relative to the other intermediate housings to accommodate the difference positions of the transmission housings relative to the motor housings.

Range of power tools

A knob assembly for a power tool comprising: a knob having a slot and knob recess, the slot and knob recess intersecting each other at an intersection within the knob; a latch slideably mounted within the slot; a peg located within the knob recess; wherein the peg and latch engage with each other via the intersection in order for the peg to retain the latch within the slot and for the latch to retain peg within the knob recess.

Mode change knob assembly

A switch assembly for a power tool including a switch member and a fixing part. The switch member including a finger grip part, a retaining part for retaining the switch member on a power tool, and an opening extending at least partially through the switch member, the retaining part arranged to project laterally with respect to an axis of the opening. The fixing part is arranged to be located in the opening. The switch assembly is arranged such that when the fixing part is at a first location in the opening, the retaining part adopts a retention configuration in which it projects laterally to a predetermined extent. When the fixing part is removed or at a second location in the opening, the retaining part adopts an insertion configuration in which it does not project laterally or projects less than the predetermined extent.

Switch assembly for a power tool

A reciprocating drive mechanism for a striker in a hammer, a rotary hammer, or a power drill having a hammer action, includes a sinusoidal cam channel formed on a drive member and a cam follower, in the form of a ball bearing, attached to a driven member which, due to the interaction of the cam and cam follower, results in a reciprocating movement of the driven member. Both the drive member and driven member can be rotatingly driven by a motor, their relative speeds resulting in the reciprocating movement of the driven member. The driven member is connected to the striker either via a mechanical helical spring or an air spring.

Hammer drill with camming hammer drive mechanism

A tool holder for a power tool, in particular a drilling and/or hammering tool comprising a manually actuable sleeve () wherein components of the tool holder are held within the sleeve by a snap ring () which snap ring is fitted within the sleeve. The snap ring has at least one resilient arm () and the sleeve has a corresponding number of through holes () which extend to a radially outwardly facing surface of the sleeve, arranged such that the or each arm is engageable with a corresponding through hole in a snap fit. Each arm and through hole cooperate so that the portion () of the or each arm which can be viewed from the radially outwardly facing surface of the sleeve appears in the shape of a symbol. Thus, the snap ring () has the dual function of maintaining components, such as a locking ring () within the sleeve () and of providing an external indication to a user of how to actuate the sleeve.

Tool holder

An electrically powered tool having a dust collection unit powered by a motor, which unit can be releasably fitted to the tool includes a plug arrangement and a cooperating socket arrangement, one of which is formed on the tool and the other of which is formed on the unit. A first mechanical fixing arrangement is provided comprising a first projection and a first cooperating recess, one of which is formed on the tool and the other of which is formed on the unit. A second mechanical fixing arrangement is provided and comprises a manually actuable releasable latch arrangement and a second cooperating recess, one of which is formed on the tool and the other of which is formed on the unit. The first and second mechanical fixing arrangements cooperate to secure the dust collection unit to the tool in such a way that the plug and socket arrangements form an electrical connection.

Hand held drilling and/or hammering tool with dust collection unit

An electrically powered hammer comprising a hollow spindle within which spindle is reciprocatingly mounted a piston, a ram, a beatpiece having an increased external diameter mid-portion and located within the spindle between the ram and the tool or bit, a two part sleeve arrangement located within the spindle and including an increased internal diameter mid-portion for receiving the increased external diameter portion of the beatpiece and a reduced internal diameter forward and rearward portion for guiding the forward and rearward ends respectively of the beatpiece and where the sleeve arrangement includes a forward sleeve and a rearward sleeve which are both guided with tight radial tolerances and with a slight axial play within and by the spindle and the forward axial movement of the forward sleeve is limited by a reduced diameter portion of the spindle and the forward axial movement of the rearward sleeve is limited by the forward sleeve.

Hammer

A dust extraction shroud for a drill, which surrounds a drill bit and which lies adjacent the work surface, comprises a body portion defining a first inlet adapted to engage the work surface and to surround the location at which said bit penetrates the surface. The shroud body further defines a first outlet connected to a source of suction and a third inlet for allowing the bit to pass through said body portion. A first sealing means is arranged in said third inlet for surrounding said bit and resisting the flow of air. Wherein said body portion includes at least one protruding portion defining a second inlet between said protruding portion and an adjacent part of said body, and on a side of said protruding portion remote from the first inlet. The second inlet admits air to enter said body portion and travel to the first outlet.

Growing community of inventors

Idstein, Germany

Ralf Bernhart