Abstract: The invention is based on a protective hood fastening device having a fastening element (12a-12n) for fastening a protective hood (14a-14n) which is intended for partly enclosing a rotating application tool on a body (16a-16n) of an electric tool (10a-10n). It is proposed that the fastening element (12a-12n) comprise at least one latching element (18a-18n) for locking the protective hood (14a-14n) against rotation relative to the body (16a-16n) of the electric tool (10a-10n).

Abstract: A machine for finishing an object comprising feed members to feed the object along a reference plane (P1), and at least a work station provided with a tool which contacts the object in a work zone (Z) near the reference plane (P1). The machine comprises two lateral supporting walls arranged substantially orthogonal both to the reference plane (P1) and also to the median plane (P2), which support the work station laterally, in order to define with the work station a modular structure able to be selectively associated with other modular structures along the direction of feed of the object.

Abstract: The present invention concerns an apparatus (1), preferably for grinding a surface, including at least one grinding unit, a screen (2, 3) and a guide member (5), where the grinding unit is a rotatable and preferably horizontally arranged grinding cylinder, which at a cylinder surface is provided with a number of preferably exchangeable grinding elements, where the screen (2, 3) entirely or partly encloses the grinding unit, and where the guide member (5) is connected with the screen (2), and where the screen includes an outer screen (2) and an inner screen (3) which are mutually movably connected, and where the inner screen (3) includes a first suction screen (11) and a second screen (12) which are mutually movably connected.

Abstract: The invention relates to a protective hood for a portable tool with a rotary tool, having a clamping device designed as a clamping ring for fastening to a machine neck of the portable tool, and having an anti-rotation locking means for fixing the angular position of the protective hood relative to the portable tool. It is proposed that at least one rotation-locking element (19) which can interact with a rotation-locking element (19) of the machine neck be arranged in a fixed position on the clamping ring (7) for forming the anti-rotation locking means. A portable tool having such a protective hood (1) is also proposed.

Abstract: The invention relates to a protective hood for a hand tool, in particular for an electrical hand tool which has a support area for the attachment of a flange of the hand tool, and with a clamping device for fastening the protective hood to the flange as well as an anti-twist device to secure the angle position of the protective hood relative to the hand tool. It is provided that the support area (9) has at least one anti-twist device element (18) working in conjunction with at least one anti-twist device mating element (47) of the flange (34).

Abstract: Hood plates for use with hood covers designed for handheld power tools including angle grinders are disclosed herein. More specifically, the hood plates disclosed herein include means for easily attaching to a wide variety of available angle grinders and are easily configured to work with a soft hood cover to allow both horizontal and vertical movement of the grinding attachment within the hood cover.

Abstract: A knife sharpener comprising a sharpening device preferably of the type involving upwardly extending pairs of overlapping, resiliently flexible fingers or strips forming opposed abrasive sharpening faces, provided with a pair of shields respectively operative between closed positions in which they cover and protecting the sharpening device and open positions in which they respectively provide a handhold for the device and protect the hand of the user when it is on the handhold, and preferably provided with locking means moveable between a first position engaging said shields and retaining them in said closed position and a second position releasing said shields from their closed positions and extending out from said assembly to provide protection for the hand of the user.

Abstract: The invention relates to a grinding-wheel cover (3) for grinding wheels with a support body (1) and a grinding layer (2) arranged at an edge or face for edge or face use in grinding, a grinding-wheel cover being provided for forming cavities on the grinding body, wherein the grinding-wheel cover (3) additionally being provided with partitions, recesses or cutouts (5) for increasing the pressure of the cooling and or lubricating medium.

Abstract: A sharpening apparatus having at least one guide slot, a drive pulley drivingly coupled to a frame and at least one idler pulley rotatably coupled to a support member. The support member is pivotably coupled to the frame. The apparatus includes an endless abrading belt rotatable in a path over the drive pulley and the at least one idler pulley and a biasing member coupled to the frame for biasing the support member toward an engaged position. Pivotal movement of the support member adjusts tension in the belt. A tool is traversed into the guide slot for sharpening a cutting edge thereof. The belt and support member respond to application and release of a force applied to the belt by the cutting edge to decrease and increase, respectively, belt speed to preclude overheating of the cutting edge and damage to the belt and cutting edge.

Abstract: The present invention is based on a hand-held power tool with a housing (12), an oscillating body (18) provided for oscillation relative to the housing (12), and connecting means (22) which fasten the oscillating body (18) to the housing (12). It is provided that the connecting means (22) include a receiving part (26) which can be installed in the housing (12) and an oscillating element (28) which is separate from the receiving part (26) and is provided for deformation.

Abstract: A machine for polishing aircraft windows including a window positioner device securable to the side of an aircraft, a frame for holding a polishing system attachable to the window positioner device, a robot seat frame system attachable to the frame, and a robot secured to the robot seat including a robot arm with capability to pick up, use and discard abrasive pads useful for polishing aircraft windows.

Abstract: Embodiments of an accessory attachment for a rotary power hand tool are disclosed wherein the hand tool is of the type which has a tool housing with a preferably cylindrical nose portion, a motor having a motor drive shaft with a mounting coupling extending forwardly from the nose portion for receiving a drive shaft, the attachment comprising a housing having a first end portion configured to be mounted to the tool housing nose portion and an input shaft for coupling to the motor drive shaft, and having an enlarged second end portion oriented at a right angle relative to the first end portion and also having an output shaft coupled to the input shaft at a right angle relative thereto, a rotary cutting wheel mounted to the output shaft and substantially disposed within said enlarged second end portion, excepting an exposed portion of the rotary cutting wheel for engaging a work surface, an adjustable guide foot pivotally connected to the enlarged second end portion and having a front surface configured to abut

Abstract: A manually operated electric machine tool for a disk-shaped rotating tool (18), having a machine housing (11) from which a drive spindle (12) for the tool (18) protrudes and on which a hollow cylindrical collar (15) is embodied coaxial to the drive spindle (12), and having a guard (20) that is detachably connected to the machine housing (11) and is designed to at least partially cover the tool (18), which guard can be mounted to and fixed in relation to the collar (15) by means of a clamp (23) with a clamping element (24). To set the guard (20) in desired rotation positions in relation to the machine housing (11) without using an auxiliary tool, and to secure the guard (20) in any rotation position, the clamp (23) is secured to the collar (15) in a rotating fashion and a manually releasable locking mechanism is provided between the clamp (23) and the collar (15) (FIG. 1).

Abstract: A covering device (2) for a power tool (4) for driving a circular working tool (6) includes a cover (8) for enclosing the circular working tool (6), a guide member (18) pivotally supported on the cover (8) for being placed onto the workpiece (28), a spring for biasing the guide member (18) in a first pivot direction (S1) away from the cover (8) and an adjustable depth stop (30) a locking device (38) for additionally adjustably securing the guide member (8) in a direction of the first pivot direction (S1).

Abstract: An apparatus for edge processing of a glass sheet, the apparatus including a shroud, a finishing member and a wiping device. The finishing member is substantially enclosed by the shroud. The apparatus uses pressurized air emitted by at least one slot in the wiping device to prevent contaminants resulting from the edge processing from settling on and/or adhering to surfaces of the glass sheet. The wiping device may include a jet of washing fluid directed at the glass sheet to further wash the surfaces and the processed edge of the glass sheet.

Abstract: The improved milling machine makes use of individually controlled x-axis, y-axis, and z-axis carriages. These carriages provide positive and precise control of the position of the cutting tools and the blank to be cut. The tools are located in spindles that are moved in the x-axis. A work piece or blank is manipulated in the y-axis and the z-axis. The tools are offset in the x-axis. Lights on a work space door are used to signal the condition of the mill machine and the milling operation. A tool changer allows the tools to be changed to accommodate other materials. A camera or other sensor is used to detect the location and wear on the tools.

Abstract: The arrow blade sharpening apparatus is best suited for precision sharpening of arrow blades, Exacto® knife blades, and other like edges which require precision and fine honing. The transparent lidded apparatus is motorized and counter rotates drive gears and then ceramic abrasive wheels with a single motor. The slot of the housing and the guide of the blade holder provide for exact sharpening work without the possibility of angle misalignment of the blade-to-wheel contact.

Abstract: A protective cover for a cutting wheel of a hand-held cut-off machine driven by an internal combustion engine has a circumferential wall and two opposed sidewalls adjoining the circumferential wall. The circumferential wall and the two sidewalls are a monolithic component made of cast light metal. The circumferential wall in a circumferential direction has at least over sections thereof a first integral thicker portion. The two sidewalls are thinner than the first integral thicker portion. Preferably, the protective cover is made of diecast magnesium.

Abstract: A handheld power tool has a housing, a rotating cutting tool having a clamping neck structurally connected to the housing, a guard hood that covers the cutting tool and has a guard hood part and a slip-on ring for receiving the guard hood releasably and adjustably on the clamping neck, the slip-on ring being connected to the guard hood part and having detent means for axially securing the slip-on ring to the clamping neck, and additional torsion-prevention means configured as a stop flange provided on the guard hood, the flange being provided in addition to the slip-on ring and connected to the guard hood part so that, in an installed state the stop flange is in contact with a component of the power tool that is structurally connected to the housing.

Abstract: A radial arm saw is adapted with a safety top configured with cutting box enclosure that contains and collects substantially all of the sawdust generated during use. A dust collection system is in fluid communication with the cutting box for removing the sawdust contained therein. Spring biased push blocks function to hold the work piece in place during the sawing process while maintaining the user's hands safely away from the saw blade. A laser alignment device projects a beam within the cutting box along the cutting plane. A control panel is provided to allow use by authorized users upon entry of an authorization code.

Abstract: The improved milling machine makes use of individually controlled x-axis, y-axis, and z-axis carriages. These carriages provide positive and precise control of the position of the cutting tools and the blank to be cut. A tool changer allows the tools to be changed to accommodate other materials. A camera is used to detect wear on the tools.

Abstract: In a cutting apparatus having a circular blade with a dust discharging unit for, during cutting, discharging chips (dust) within a dust cover covering the circular blade, a pulley is fixed to an output shaft of a power source, and a flat belt for transmitting power to the dust discharging unit is engaged with the pulley. The pulley and the flat belt are covered with an inner cover within the dust cover. The inner cover has a through hole for allowing the output shaft to protrude the inner cover therethrough with a seal made of felt to prevent dust from entering the inside of the inner cover. A surface touching member is provided around an opening edge of the dust cover movable along an axial direction of the output shaft by spring-loading, which automatically reduces the gap between the dust cover and the object to prevent dust from being scattered.

Abstract: A cover device for partially covering a disc-shaped working tool includes a bearing member (22) forming a receiving space (54) for receiving the shielding member (10) of the working tool and having an inner surface (24) against which an outer surface of the shielding member (10) lies when received in the receiving space (54), and a pivot member (48) supported on the bearing member (22) for a pivotal movement about a pivot axis (S1) between a locking position in which the receiving space (54) is limited at both ends in tangential and axial directions and is at least partially limited outwardly in a radial direction, and an open position in-which the receiving space (54) is open in at least one of the axial direction and the tangential direction.

Abstract: A metal cutting circular saw is provided with an upper blade guard which includes a first sight window disposed in a first side surface and disposed in a plane angularly offset from a plane of the blade. The upper blade guard also includes a second sight window disposed in the second side surface of the upper blade guard. A light window is disposed in a front portion of the perimeter outer surface of the upper blade guard. The upper blade guard is made from metal and the first and second sight windows and the light window are integrally formed as a one-piece member. The saw shoe and lower blade guard are configured to minimize chip spray from contacting a user.

Abstract: The present invention is directed to a wafer holder and a related wafer conveyor system. The wafer holder holds a wafer and moves horizontally within a chamber. A contact area between the wafer and the wafer holder is reduced, and potential contaminants generated by ear between components of the wafer holder are trapped by an airtight cover. Since the wafer holder moves horizontally while being fixed to a guide rail, the wafer conveyor system reduces friction between the guide rail and the wafer holder.

Abstract: An electric hand power tool has a housing, an air-cooled electric motor which is accommodated in the housing, a tool which is driven by the electric motor a protective hood which at least partially covers the tool, the housing having a handle and an auxiliary handle for a two-hand guidance of the hand power tool, the auxiliary handle being positioned in a plane transverse to a plane of the first-mentioned handle and, with reference to a work direction, before the first-mentioned handle, the auxiliary handle being completely hollow and having an inlet communicating with the protective hood so as to carry motor cooling air which has left the housing and passed the protective hood for the tool and then flows into the inlet of the auxiliary handle carrying debris and through the auxiliary handle and out of the latter, so that the auxiliary handle is operative for damping a flow noise of the air from the electric motor, from a motor-cooling fan and from the tool.

Abstract: The invention relates to a power tool such as a router which is provided to perform an operation on a work piece. The tool includes dust extraction apparatus to allow dust and debris to be removed from the location at which the work is performed and part of the extraction apparatus is movable between storage and in-use positions. When said part is moved to a storage position, an alternative dust extraction passage may be fitted in to the port or aperture. Typically, the part which is movable can be telescopically movable or alternatively, can be provided of a flexible member so as to be moved between extended and retracted positions.

Abstract: A machine tool has a support table provided on an upper surface of a bed to support a work, a Z-axis saddle, a machining unit mounted on the Z-axis saddle and provided with a machining head, a compartment cover arranged on the bed to compartment a region and a machine region, an opening window provided on the compartment cover to permit the machining head to go in and out therethrough, and a seal member in the form of a closed ring to be mounted on an inner peripheral edge of the opening window of the compartment cover, wherein an entire periphery of an outer peripheral surface of the machining head is brought into sliding contact with an inner peripheral edge of the seal member in a state, in which the machining head is moved into the machining region from a tool exchange position within the machine region.

Abstract: A portable power grinder has a housing, a rotating output shaft with a grinding wheel mounting device, a grinding wheel safety guard adjustable between angular positions defined by apertures in the safety guard, and a manually operable safety guard arresting device engageable with an aperture. The arresting device has a lock slide movable on the housing and operable by an articulated lever connected at one end to the housing and at another end to the lock slide and being shifted by folding and unfolding, thereby moving the lock slide between a safety guard arresting position and a safety guard releasing position and locking the lock slide in the arresting position. The lock slide includes a spring exerting a force onto the safety guard in the arrested position. A lock spindle displaceably supported on the lock slide moves between a retracted safety guard locking position and an advanced position to lock the output shaft.

Abstract: The present invention describes a plate comprising a mono-block body through which a plurality of holes pass, and a deflector that covers at least the external part of the upper surface of said mono-block body. The mono-block body is made up of a rigid support sunk into a flexible body and provided with a holed peripheral part. Said deflector partially or completely covers said peripheral part of the rigid support and presents in the second case a plurality of slits for the passage of the dust sucked through said holes.

Abstract: A manually operated implement, in particular a parting-off grinder or similar device is provided. The implement has a bracket which has a first end, which is fixed to the housing of the tool, and a second end to which is fixed a spindle which drives, for example, a metal cutting tool. The spindle is driven by a drive wheel via a belt drive. A bracket of high rigidity at low overall weight can be achieved if the bracket is designed as one piece and can be fixed to the housing in at least two positions.

Abstract: A portable rail cutting apparatus is presented herein. The portable rail cutting apparatus comprises a housing encasing a motor, the motor configured to drive a rotary abrasive blade, a drive pulley coupled to the motor, a driven pulley coupled to the rotary abrasive blade, a loop drive belt engaged by the drive pulley at one end and engaging the driven pulley at another end, and an automatic belt tensioning mechanism. The automatic belt tensioning system comprises a spring and push rod assembly that applies a pre-set tension to the loop drive belt. The portable rail cutting apparatus may also comprise an adjustable protective guard member that partially surrounds the rotary abrasive blade and includes a detent mechanism configured to provide integral travel positions for the adjustable protective guard member.

Abstract: The present invention refers to a motorized tool with suction and dust collection capacity. The tool comprises: means for extracting dust suitable for producing a flow of air; means for collecting dust having a first duct for the entrance of the air, that can be connected separately to said tool, and at least one second duct for the air, connected to the outside environment; said means for collecting dust include a filtering element positioned between said first duct and said second duct. Said filtering element defines an internal space and an external space surrounding said internal space, one of which is in communication with said first duct and the other is in communication with said second duct.

Abstract: A pneumatic buffing machine including a housing having an internal chamber in which a pneumatically driven motor set is mounted. The motor set includes an eccentric block for driving a grinding disc. A skirt shade is screwed under a bottom of the housing by means of outer thread and inner thread. The skirt shade has a large diameter section and a small diameter section. The skirt shade is formed with a central through hole. The eccentric block of the motor set is passed through the through hole and accommodated in the large diameter section. A shoulder section is formed between the large diameter section and the small diameter section and adjacent to the outer thread of the small diameter section. A top end of the small diameter section serves as a stopper section.

Abstract: A chemical mechanical polishing method for polishing an oxide film and a protective film formed on a substrate having recesses comprises four steps. The first step planarizes the oxide film using a polishing pad and a polishing agent containing cerium oxide particles by causing relative rotational motion between the substrate and the polishing pad. The second step continues polishing the oxide film to maintain the planarized property of the oxide film. The third step polishes the oxide film until at least a portion of the protective film becomes exposed. The fourth step polishes the oxide film until the oxide film is substantially removed and the protective film is substantially exposed. During the four steps, torque values are measured on the substrate or the polishing pad, and changes in torque with time are calculated. This information is used to determine the status of each of the steps during the polishing run.

Abstract: A method for inspecting the uniformity of the pressure applied between a conditioner and a polishing pad on a chemical mechanical polisher. A sheet of pressure sensitive material is placed between the conditioner and the polishing pad, and the conditioner is lowered onto the sheet of pressure sensitive material. A desired degree of pressure is applied between the conditioner and the polishing pad, thereby creating an impression in the sheet of pressure sensitive material, and the conditioner is lifted from the sheet of pressure sensitive material. The sheet of pressure sensitive material is inspected to determine the uniformity of the pressure applied between the conditioner and the polishing pad.

Abstract: A substrate processing apparatus is used for removing surface irregularities occurring on a peripheral portion (a bevel portion, an edge portion, and a notch) of a substrate, such as a semiconductor wafer, and films deposited as a contaminant on the peripheral portion of such a substrate. The substrate processing apparatus includes an edge-portion polisher for pressing a polishing tape against an edge portion of a substrate and causing relative movement between the polishing tape and the substrate to polish the edge portion of the substrate, and a bevel-portion polisher for pressing a polishing tape against a bevel portion of the substrate and causing relative movement between this polishing tape and the substrate to polish the bevel portion of the substrate.

Abstract: A portable power tool, in particular an angle grinder (10), includes a longitudinal housing (12) for accommodating a motor for driving a driven shaft (16) that is outwardly bent relative to the housing (12), the driven shaft being rotatably supported in a gearbox casing (14) and extending out of it with a free end that is provided to accommodate a sanding body. A protective cover (43) encompassing the sanding body is capable of being fastened on the gearbox casing (14) such that its rotation can be adjusted, and the rotational position of which is lockable using a notch lever (30). The device is made safer to operate and more cost effective to manufacture by the fact that the notch lever (30) is positioned transversely to the longitudinal axis of the angle grinder (10) and is pivotable around an axis (34) positioned substantially parallel to the housing (12).

Abstract: A floor machine comprising a motor, a body, and a dust collection system. The dust collection system comprises a skirt, which is coupled to the floor machine and forms a cavity over the body and a floor treatment pad. The skirt includes an air channel device secured to a bottom edge of the skirt. The air channel device encircles the floor treatment pad and comprises a multiplicity of slots between a floor and the skirt. Jointly, the skirt and air channel device confine particles within the cavity. A vacuum for sucking the particles from the cavity creates high velocity air flow through the air channel device. Negative pressure within the cavity prevents particles from escaping. The particles are removed from the cavity through a vacuum tube into the vacuum.

Abstract: A radial arm saw is adapted with a safety top configured with cutting box enclosure that contains and collects substantially all of the sawdust generated during use. A dust collection system is in fluid communication with the cutting box for removing the sawdust contained therein. Spring biased push blocks function to hold the work piece in place during the sawing process while maintaining the user's hands safely away from the saw blade. A laser alignment device projects a beam within the cutting box along the cutting plane. A control panel is provided to allow use by authorized users upon entry of an authorization code.

Abstract: A movable machine, for example a saw, has a light construction using composite materials such as fiber reinforced resins and a closed cell foam. The saw may have a housing formed from multiple skins of the composite materials in which is located the closed cell foam. Metallic inserts may be used to bond to either or both of the foam and the composite skin to accept working components. A saw is also described which uses gears sharing the same support element.

Abstract: A portable grinding machine (10) includes an elongated housing (12, 14) and an output shaft (16) projecting at a right angle to the housing axis for receiving a disk-shaped rotary clamping tool. The output shaft is encompassed by a substantially cylindrical clamping collar (30), on which a shell-like protective cover (20) is secured in a tensile manner against rotation and axial displacement and which serves for encompassing the clamping tool (18) and which can be attached on the clamping collar (30) with a ring-shaped tensioning belt (28). The tensioning belt (28) has sharp-edged projections (32) projecting to the clamping collar, which upon clamping, born into the clamping collar and are held there in a form-locking manner (a shell-like tensioning band).

Abstract: According to one aspect, the invention provides a blocking apparatus and a blocking method for precisely aligning a button holder against a block during blocking process of lens manufacturing. According to another aspect, the invention provides a blocking apparatus a blocking method for automatically applying a wax material on a button. In one embodiment, the blocking apparatus includes an automatic wax delivery system having an automatic retractable dispensing nozzles for wax delivery.

Abstract: Methods and apparatus to implement techniques for monitoring polishing a substrate. Two or more data points are acquired, where each data point has a value affected by features inside a sensing region of a sensor and corresponds to a relative position of the substrate and the sensor as the sensing region traverses through the substrate. A set of reference points is used to modify the acquired data points. The modification compensates for distortions in the acquired data points caused by the sensing region traversing through the substrate. Based on the modified data points, a local property of the substrate is evaluated to monitor polishing.

Abstract: A concrete engraver apparatus including a carrier for use with a hand-held engraver. The hand-held engraver is detachably mounted to the carrier. The carrier has wheels and a handle attached to an enclosure. The enclosure includes a vacuum mount for attaching a vacuum tube to evacuate loosened particles from the enclosure during operation of the hand-held engraver.

Abstract: A method and apparatus for planarizing a microelectronic substrate. In one embodiment, the apparatus can include an elongated, non-continuous polishing pad oriented at an angle relative to the horizontal to allow planarizing liquids and materials removed from the microelectronic substrate to flow off the polishing pad under the force of gravity. Two such polishing pads can be positioned opposite each other in a vertical orientation and can share either a common platen or a common substrate carrier. The polishing pads can be pre-attached to both a supply roll and a take-up roll to form a cartridge which can be easily removed from the apparatus and replaced with another cartridge.

Abstract: A gang blade assembly which controls the trajectory of detritus from a ball grid array substrate dicing operation is described. The assembly includes a cover which partially encases a hub with a plurality of blades. A brush is mounted on the cover to disrupt an air flow created by rotation of the hub and blades. The brush extends beneath the cover and has bristles which contact the hub. The bristles also serve to clear the hub of any detritus produced during dicing. More than one brush may be mounted on the cover.

Abstract: A pneumatic sanding machine includes a body, a pneumatic motor assembly mounted in the body and a control valve detachably mounted in the body to change the path of compressed air that actuates the sanding machine. The control valve includes a first portion selectively closing one of different air passages in the body at a time, a second portion and a neck portion interconnecting the first portion with the second portion. Thus, a dust bag or a vacuum cleaner can be connected to the sanding machine to collect dust or sanding debris so that the sanding machine provides three different ways of dust collection, one of which is not to deal with the powder, the second is to collect the powder into a dust bag, and the third is to vacuum the powder into a vacuum cleaner.

Abstract: A guard device for a hand power tool, in the form of a sanding/grinding hand power tool, has a wheel guard enclosing at least part of a rotating tool in a radial direction; a guide for guiding the wheel guard along a work piece, and comprising a fastening device for mounting the wheel guard on the hand power tool, wherein the guide is joined with the wheel guard in torsion-resistant fashion, and the wheel guard is mounted in a fashion that allows it to move relative to the fastening device; and a depth-of-cut stop limiting the relative movement of the wheel guard and fastening device, and being lockable in position with positive engagement in preselected stepped positions.

Abstract: A protective hood assembly (6) for a tool machine (2) is formed of a housing with a protective hood (10), to a securing assembly (8, 8?, 8?) relative to the housing (4) in different rotary positions, wherein at least one lock-in part (30, 30?) is provided, which can be brought along a direction of installation (M) into a receiving region (36) of a locking housing (16) of the securing assembly (8) and at which, by rotating, can be brought into a bayonet-like engagement and wherein locking means (32, 32?) are provided on the protective hood, the locking means being capable of being locked in different locking positions with counter locking means (26, 26?) of the securing assembly (8). The receiving region (36) is limited on a side facing the housing (4) at least in part by an abutting wall (34, 34?, 34ä, 34?b), which is mobile.