Abstract: A machining center is provided with a cutter depot structure comprising a cutter socket, a cutter disk, and a round machine frame. The cutter socket is rotatably mounted on the periphery of the cutter disk by a retaining pin which is put through an L-shaped rod of the cutter socket. The L-shaped rod is provided with a roller. The cutter disk is provided with an annular stop surface. The round machine frame is provided with a wearproof annular pad having a cut. The cutter socket in motion is confined by the stop surface of the cutter disk and the annular pad of the machine frame such that the cutter socket is kept in the horizontal state. The cutter socket is turned on the retaining pin to facilitate the inverting of the cutter, thereby resulting in reduction in length of a cutter exchanging arm.

Abstract: In a sawing tool for a hand circular power saw with two coaxial saw blades (11, 12), which can be driven to counter-rotate in relation to each other, which each have an outer set of teeth (13, 14) that represents a main cutter, in order to improve the cutting result even with continuing wear on the cutting edge and in order to reduce damage to the teeth (13, 14) when the saw blades (11, 12) are imperfectly balanced, a trimmer (10) is disposed between the two saw blades (11, 12), which serves to cut away a piece of material possibly remaining in the kerf between the saw blades (11, 12) and which is non-rotatably attached to one of the saw blades (11, 12) and shares an axial overlap with the main cutters (FIG. 3).

Abstract: An electrical tool including a hollow spindle (2) for supporting a working tool (3) and a quick-action device for clamping the working tool (3) with respect to the hollow spindle (2) and having a clamping spindle (4) arranged in the hollow spindle (2) with a possibility of an axial displacement relative thereto, an elastic member (5) for biasing the clamping spindle (4) into its clamping position, an actuation device for displacing the clamping spindle into its exchange position, and a compensator for interrupting the action of the elastic member (5) on the clamping spindle (4) at least in the exchange position of the clamping spindle.

Abstract: A power tool includes a motor, an arbor driven by the motor, a rotatable cutting tool disposed on the arbor and having a rotational axis, the cutting tool further having a hole, first and second clamps connected to the arbor and clamping the blade, wherein one of the cutting tool and at least one of the first and second clamps and arbor have a first drive surface for contacting a second drive surface on the other of the cutting tool and the at least one of the first and second clamps and arbor, the second drive surface being movable between a first position contacting the first drive surface and a second position bypassing the first drive surface. The second drive surface is resiliently connected to the other of the cutting tool and the at least one of the first and second clamps and arbor. At least one metal strip connects the second drive surface to the other of the blade and the at least one of the first and second clamps and arbor.

Abstract: An idler pulley wheel arrangement for a bandsaw includes a non-rotating idler shaft and an idler pulley wheel assembly positioned on the shaft for rotation relative thereto. A latch mechanism is positioned on an end of the shaft and includes a latch part connected to the end of the shaft for movement between a first position defining a latching state of the mechanism in which a portion of the latch part extends beyond an outer surface of the shaft and a second position defining a non-latching state of the mechanism in which the latch part is positioned entirely within or in substantial alignment with the outer surface of the shaft. The latch mechanism also includes a catch positioned on the end of the shaft for holding the latch part in the non-latching state such that the idler pulley wheel assembly can be slid off the end of the shaft when the latch mechanism is in the non-latching state.

Abstract: With a blade exchanging device, a cylindrical body is engaged with a nut that is fastened to a spindle, and at the same time the nut is held by fitting nails of a chuck member with grooves that are formed on the nut. Next, a torque wrench is inserted through the cylindrical body, and a polygonal head of the torque wrench is engaged with a polygonal hole formed in the head of the spindle. In this state, the spindle is rotated with the torque wrench in a direction to unfasten the nut from the spindle. The nut is thereby detached from the spindle. When the cylindrical body is disengaged from the spindle, the nut is prevented from falling off the cylindrical body, since the nails of the chuck hold the nut.

Abstract: An ultrasonic vibration cutting method comprising mounting and fixing a part to be cut on a mounting table, moving down an ultrasonic vibration rotation unit, stopping the downward movement of the ultrasonic vibration rotation unit when the cutting blade of the ultrasonic vibration rotation unit reaches a position for cutting the part, moving the ultrasonic vibration rotation unit linearly for cutting, and turning and vibrating the cutting blade with ultrasonic waves to cut the part.

Abstract: A machine tool has a work table which defines a working surface and has a cutting tool which is attached to and movable with respect to the work table. The cutting tool extends through a removable throat plate. An integral arbor wrench is provided which is accessible when the throat plate is removed. The wrench is designed to engage the arbor shaft to facilitate tool changing by preventing rotation of the arbor shaft. The wrench is also designed to not allow reassembling of the throat plate when the wrench is in engagement with the arbor shaft.

Abstract: A handheld machine tool, for example a circular saw, has a disk-shaped tool which is driven in rotation in a housing which holds a drive motor and a tool shaft carrying the tool. The tool can be clamped between a clamping nut, a clamping screw, and two supporting flanges. One supporting flange can be rotated easily relative to the tool shaft without use of auxiliary tools and is supported with an extensive friction at the tool. This supporting flange can be dependably clamped or loosened without tools. The machine tool further has an adjusting device which is coupled with that supporting flange to displace the latter axially toward the tool when that supporting shaft is rotated relative to the tool shaft due to rotational driving. The adjusting device therefore clamps the tool with an increasing force and tries to displace that supporting flange axially away from the tool automatically when the tool is stopped and accordingly reduces the clamping force.

Abstract: An arbor lock mechanism for use with an arbor of a table saw. The mechanism includes a bearing plate connected to the frame of the table saw and through which the arbor rotates. The mechanism also includes an arbor lock plate connected to the bearing plate and having an upper pivot hole, a central hole and a lower arcuate slot. The central hole includes a lower section through which the arbor extends and rotates and an upper section that has flat edges to secure the arbor in a locked position. The arbor lock plate includes lift portion to move the plate between an open position, where the arbor rotates, and a locked position that secures the arbor.

Abstract: A disk-shaped cutter extending in a direction perpendicular to the central axis of a resonator is detachably installed on the resonator which is molded substantially cylindrical with a fastening unit.

Abstract: An automatic blade changing system of a dicing machine uses a blade which is fixed to an auxiliary stopper member provided with a thread which is engaged with a thread of a spindle. The automatic blade changing system consists of two blade holding means which hold the blade to which the stopper member is fixed and rotate the blade relatively to the spindle in the state wherein the blade is forced to the spindle, a blade accommodating means which accommodates a blade to replace the blade, a moving means for moving the blade holding means between the end of the spindle and the blade accommodating means.

Abstract: A cutting device for cutting elongate flat-walled tubular stock into preselected lengths which cutting device includes opposed circular cutting blades that are laterally movable to effect a transverse cut across the tubing. The cutting blades are rotatably mounted and engaged with a locking assembly to prevent rotation thereof. Each cutting blade includes a peripheral cutting edge incrementally defining a plurality of contact portions with one contact portion being disposed in an active cutting position and the remainder of the contact portions being disposed in inactive standby positions. Each cutting portion has an arcuate shape so as to minimize the vertical components of the cutting force being applied thereby as the depth of the cut approaches an interior surface of the tubing.

Abstract: A blade mounting structure in which a mounted blade is rotated in a well-balanced condition and further the blade can be easily attached to and detached from the apparatus is provided, which structure comprises a mount including a flange and a first cylindrical engagement portion and a first screw portion; a cutting blade including a second engagement portion; and a screw member including a second screw portion, wherein the cutting blade is mounted onto the mount so that the first engagement portion is engaged with the second engagement portion, and the second screw portion is screwed into the first screw portion and wherein the tolerance of the engagement portions, the thickness of the first engagement portion, the gap between the flange and the first engagement portion, and the diameter of the flange are selected to have a particular relationship such that the engagement portions are not engaged under an inappropriate contact condition when the blade is inserted into the mount.

Abstract: A saw blade having a central aperture for mounting on an arbor of a concrete cutting machine is disclosed with the arbor having a raised mounting boss corresponding in shape and size to the central mounting aperture of the saw blade. The central mounting aperture of the saw blade is triangular in shape with one apex of the triangle overlying the perimeter of the arbor and the other two apexes of the triangle within the face of the arbor.

Abstract: An apparatus for mounting a device, such as a saw blade, on a base (3) to enable the blade to be positioned accurately in either of two distinct positions relative to the base. The apparatus comprises a pivot member (21) for supporting the blade (not shown) pivotally mounted on a fixed member (11). The fixed member (11) includes a pair of abutments (142,144) and the pivot member has at least one asymmetric stop (160) for abutting the abutments (142,144) after rotation of the pivot member (21) relative to the fixed member to define the distinct positions of the blade. These positions are defined generally by the positions of the abutments (142,144) and accurately by the orientation of the or each asymmetric stop (160). The apparatus may further include a device (170) for adjusting accurately one of the distinct positions by a predetermined amount.

Abstract: An apparatus suitable to perform the transverse cutting of various materials, especially, but not exclusively, in the form of ribbons, such as, for instance, aluminium films, paper, fiberglass, plastic films and the like comprises two circular blades, slightly spaced from one another, each blade being suitable to engage with the relevant circular counter-blades; such blades and counterblades being supported by a carriage travelling on a beam and whose traverse is caused by mechanisms, which are also connected to the carriage. These blades, counterblades, carriage and beam are placed transversally and orthogonally with respect to the feed table of the material to be cut.

Abstract: In a blade support, particularly for circular blades, having a positioning arm and a blade support device rotatably fixed to it for the blade, access to the blade is made simpler by providing the blade support device with a mandrel reaching through the blade and having a bearing flange for the blade, and with a quick-action lock.

Abstract: A fastening system for a circular saw blade (1, 10), wherein the circular saw blade is fastened by means of a screw/screws (2, 9) to a fastening flange on the turning arbor (6), to a chipping edger (3) in a hewing saw, or to a chipping cutter (8). The fastening part (5, 11) of the circular saw blade (1, 10) is made frustoconical and the circular saw blade (1, 10) is fastened between two corresponding frustoconical surfaces.

Abstract: A saw (10) comprises a housing, a drive spindle (20) rotatably mounted in the housing and a circular saw blade (not shown) adapted to be releasably mounted on one end of the spindle. The blade fits over the threaded end (25) of the spindle and a nut (26) clamps the blade to the spindle. The spindle is in the form of a sleeve and is rotatable about a shaft (22) fixed in the housing. The bore (30) through the end of the spindle is of hexagonal section and corresponds with a bore (32) formed in the end of the shaft.A wrench (40) is used to remove the blade and has a socket (48) to engage the nut and a freely rotatable pin (50) which also has a hexagonal section and which is adapted to fit in the bores (30,32) when the socket is on the nut and lock the spindle to the shaft.

Abstract: The tool mounting arrangement employs a bushing within a recessed end of a shaft. The bushing has three lobes with inclined surfaces which abut against an internal conical wall of an annular mounting portion on the end of the shaft. A threaded screw passes through a washer and the grind wheel in non-rotatable relation into threaded relation in the bushing. Turning of the screw causes the bushing to be pulled in a direction out of the shaft so as to radially deform the annular mounting portion into uniform contact with the bore of the grind wheel while the grind wheel is simultaneously abutted square to the shaft axis. The annular mounting portion is provided with equi-spaced circumferentially disposed notches to permit passage of the lobes upon insertion of the bushing into the recess at the end of the shaft. One or more set screws is also provided in the shaft to prevent rotation of the bushing within the recess of the shaft.

Abstract: A saw blade of the circular type for use in an electric powered saw for cutting arcuate kerfs in lumber includes a central mounting aperture coincident with a first plane perpendicular to a rotational axis, and a blade mounting portion surrounding the mounting aperture and having an annular configuration arcuate in its cross-section from its inner periphery at the aperture to its outer peripheral margin where it joins with an intermediate annular blade portion that extends generally to a second plane generally at the outer peripheral margin of the central blade mounting portion. Joined with the outer peripheral margin of the intermediate blade portion is a toothed outer peripheral portion extending angularly in a truncated cone or dished configuration generally to a third plane on the opposite side of the first plane from the second plane. Appropriately set teeth are formed on the outer periphery of the toothed outer peripheral portion and extend generally to the third plane.

Abstract: A hand-driven food slicer which includes a gear box with a shaft extending from it and within the gear box there is a driven gear and a driving gear, the driven gear being adapted to rotate a slicing mechanism in a housing atop the device which has a charging opening and an exit opening and slicer includes a driving gear in the gear box in driving engagement with the driven gear on a shaft with a handle which extends exteriorly of the gear box.

Abstract: A compact device for clamping a disc-shaped tool on a tool spindle of a portable machine tool with a clamping anchor arranged in the tool spindle, with a clamping flange attachable to the free end of the clamping anchor, with an abutment arranged at the tool end of the tool spindle and with a manual actuating mechanism for releasably pressing the clamping flange against the abutment, thereby clamping the tool between the clamping anchor and the tool spindle. The manual actuating mechanism includes a first pressure cylinder having a first cavity and a second pressure cylinder having a second cavity, and a connecting channel between the cavities. The second pressure cylinder includes a piston delimiting the second cavity. The piston is adjustable and fixable by the manual actuating mechanism from the tool end of the tool spindle for releasably clamping the tool on the tool spindle.

Abstract: A cutter assembly of a strand cutting machine comprises a fixed cutter member, over which the strand is to be drawn after being cooled and dewatered, and a rotary cutter member coactive with said fixed cutter member to cut a strand of resin into pellets. The rotary cutter member includes i) a cylindrical rotary body having a forward side surface parallel to a supply-side end surface of the fixed cutter member, ii) a rotary shaft extending perpendicularly to the supply-side end surface of the fixed cutter member and supporting thereon the rotary body, and iii) a plurality of blades mounted on the rotary body in a forward inclined posture in the direction of rotation. The rotary body has a plurality of through-holes arranged at regular distances along a circle concentric with the rotary body, each through-hole extending between opposite surfaces. Each blade is attached to an inside surface 5a of the respective through-hole and has at its end a cutting edge.

Abstract: For a hand power tool (1) with a multi-part manually operable quick-action chuck (2) for a disc-shaped tool (3) which is held on a shoulder (4) of a drive spindle (5) and onto which a force can be loaded from the other side by a pressure plate (7), with the pressure plate (7) concentrically embracing a threaded part (13) and being arranged positionally secured in relation to the threaded part and rotatable, with a hand screw part (11) embracing the threaded part (13) and th pressure plate (7) like a sleeve, and forming an annulus (14) with these, which contains at least a rolling contact bearing (9) and a drive which couples together the hand screw part (11), the threaded part (13), and the pressure plate (7), for improved function and a simplified design, and for a limitation of the maximum clamping pressure on the tool, a rolling planetary drive is formed from at least one of the rolling contact bearings (9, 12) in conjunction with a springly element (10), the drive which couples the pressure plate (7), the

Abstract: A portable grinder (10) has a motor-driven drive shaft (15) and a quick-acting chucking device for a grinding tool (43), which comprises a spindle (20), coaxial with the drive shaft (15), which is braced against the drive shaft (15) by a spring (24) in the axial direction and can be displaced in the axial direction relative to the drive shaft (15) by means of a clamping lever (32). One external free end of the spindle (20) retains the grinding tool (43), which in a released position--with the free end of the spindle (20) extended and the spring (24) tensioned--can be removed from the free end, and in a tightened position--with the free end of the spindle (20) retracted and the spring (24) partly relaxed--is non-rotatably joined to the drive shaft. The free end is configured as a bayonet end (40) which extends though the grinding tool (43). An attachment collet (41) with a bayonet opening can be placed from outside onto the bayonet end (40).

Abstract: A food slicing machine with a circular knife having a plurality of radially spaced indentations on a portion inwardly of the cutting edge to induce air flow during rotation of the knife to prevent food particles from accumulating on the knife during cutting operation.

Abstract: A motor driven rotary tool machine having a drive shaft, an outer end portion thereof having a shoulder thereon, a rotary tool such as a saw blade having a substantially axially positioned aperture, and a retention device for securely but readily removably securing the tool on the shaft tightly against the shoulder means, wherein the retention device includes the threaded bolt receiving bore formed axially in the outer end of the shaft, a bolt mounted through the aperture of the tool and having a shank threaded into the bore, a stop on an outer end portion of the bolt spaced from the tool, and a linearly slidable ramp piece interposed between the tool and the stop and retentively forcing the tool against the shoulder of the bolt.

Abstract: A vibration damper for a rotary cutter is disclosed. The rotary cutter has a rotary saw blade and a guard for covering the rotary saw blade. The vibration damper is disposed inside the guard and has a contact member which contacts the rotary saw blade.

Abstract: An adapter for a grinding tool suited for standard attachment to a grinding machine is provided. The standard attachment comprises a receiving threaded bolt and an attachment nut for securing a supplementary tool in a usual manner. The grinding machine includes a motor-driven hollow spindle, to which a counterflange is firmly connected. A bolt receiving the standard attachment at one end thereof and guided by a flange can be screwed into the hollow spindle. Spring elements are provided for pressing the bolt and thereby the flange against the counterflange of the hollow spindle, in order to secure the standard attachment to the grinding tool. The hollow spindle can be axially displaced by a manual actuating device between an assembly position, in which the adapter may be taken off or attached, and a secured position, in which the adapter is secured against rotation and against axial movement within the hollow spindle.

Abstract: A cutting member and machine for cutting elongate members is disclosed. The cutting member comprises a body having a cutting edge defining a cavity such that the cutting edge contacts a surface to be cut at at least two points. The cutting machine comprises the cutting member, a weight pivotally connected to the cutting member to define a arm-weight assembly, and a driven member defining a central opening, wherein the arm-weight assembly is pivotally attached to the driven member so as to drive the cutting member in a circular path around the central opening, the cutting edge of the cutting member being biased inwardly towards the central opening by the weight and the resultant centrifugal force.

Abstract: A circular saw head (1) for the cutting of side boards (3) from a log (2), as a circular saw blade (4) mounted on a saw shaft (10) by a support flange (5). Within a rim of saw teeth (13) and radially spaced apart from it a frontal annular support surface (12) is provided, extending axially over the frontal surface (8) of the saw blade (4) and located in the plane of the frontally outer edges (14) of the saw teeth (13). The support surface (12) supports the surface cut on the wood by the saw teeth (13), thereby guiding the wood.

Abstract: In order to so improve a portable machine tool, in particular, an angle grinder, with a drive, with a work spindle having a tool clamping means and with a securing device which is operable from outside an apparatus housing and by means of which the tool clamping means is transferable from a manually releasable position to a manually unreleasable position in which the tool is clamped--and vice versa--that with a design which is as simple as possible from a structural point of view, rotation of the work spindle is not possible while the tool clamping means is being released or manually tightened, it is proposed that a locking device for non-rotatably fixing the work spindle on the apparatus housing be provided and that the locking device automatically lock the work spindle in a non-rotatable manner when the drive is switched off and the securing device is i the position in which the tool clamping means is manually releasable--and vice versa.

Abstract: A combined saw and chipper head comprises a frustoconical body having a circular saw blade mounted on smaller face. A plurality of straight-edged knives are mounted on truncated face of body with corner of each knife positioned in a gullet between a pair of teeth.

Abstract: A saw blade and adaptor combination for mounting on a hand held rotary powered saw to make cuts close to and parallel with a wall surface. The adaptor extends beyond the saw guard rail for making such close cuts possible and the saw blade has a recessed mounting for containing saw blade mounting bolt thereby allowing said saw blade to make cuts against and parallel to a wall surface.

Abstract: A compact device for clamping a disc-shaped tool on a tool spindle of a portable machine tool with a clamping anchor arranged in the tool spindle, with a clamping flange attachable to the free end of the clamping anchor, with an abutment arranged at the tool end of the tool spindle and with a manual actuating mechanism for releasably pressing the clamping flange against the abutment, thereby clamping the tool between the clamping anchor and the tool spindle. The manual actuating mechanism includes a first pressure cylinder having a first cavity and a second pressure cylinder having a second cavity, and a connecting channel between the cavities. The second pressure cylinder includes a piston delimiting the second cavity. The piston is adjustable and fixable by the manual actuating mechanism from the tool end of the tool spindle for releasably clamping the tool on the tool spindle.

Abstract: In a device for clamping a circular saw blade, the saw blade is firmly clamped between two flanged rings and thereby connected to these so as to form an exchangeable tool unit which is pushed onto the free end of a saw shaft for rotation with the saw shaft and slidable displacement. Compression springs or the like are arranged between the tool unit and a stop face at the free end of the saw shaft to act upon one of the flanged rings and move the tool unit a short distance away from the stop face. A rotatingly mounted thrust plate which can be pressed centrically against the other flanged ring causes the tool unit to firmly engage on the stop face of the saw shaft.

Abstract: A device for clamping a circular saw blade has a drive plate and a driven plate, a circular saw blade being clamped therebetween. The circular saw blade is clamped by means of clamping members, each being made in the form of a cam clamp. A handle of the clamp is provided with a weight and is received in a radial groove of the driven plate. A rod of the clamp form a threaded joint with the drive plate. In addition, each clamping member is engageable with a spring-biased slide block which interconnects the drive and driven plates.

Abstract: A milling cutter tool for cleanly and smoothly cutting honeycomb core material is disclosed. The cutter tool includes a circular saw blade sharpened to a knife edge. A bevel extends from the upper surface towards the sharp peripheral edge. A plurality of cutter bodies extend vertically above the circular saw blade. The cutter bodies include a plurality of teeth generally parallel to each other and extending vertically with respect to each other. The teeth include a piercing point and sharp cutting edges extending at a clearance angle from the piercing point. A flat surface extends between the teeth. The circular saw blade having a sharp bevel cutting edge provides a clean cut of the honeycomb core material at the surface to be cut. The sharp points of the cutting edges pierce the honeycomb material, dig into it and slice it. The cutting edges further slice and cut the dross honeycomb core material as it is separated from the surface being cut. A clean, smooth surface is left to which a panel may be bonded.

Abstract: An angle grinder comprising a hollow drive shaft with a counterflange mounted at an end thereof, a spindle extending through the drive shaft and coupled thereto for joint rotation therewith and an axial displacement relative thereto and having a threaded end portion for receiving thereon a clamp nut cooperating with the counterflange for clamping a grinding wheel therebetween, and a slidable wedge extending transversely through the drive shaft and the spindle and having an inclined surface displaceable along respective inclined surfaces of the drive shaft and the spindle to provide for axial displacement of the spindle relative to the drive shaft.

Abstract: An adaptor for converting a chain saw into a circular saw by means of a collar secured to both the clutch housing and the hub of the existing chain saw, the collar being held by a washer and a nut from the chain saw, said collar being cylindrical with a concentric opening through it, the concentric opening having a smaller diameter for a minor portion of the length of the collar and a larger diameter for a major portion of the length of the collar, the portion of the opening with a larger diameter being threaded and portion of the opening having a smaller diameter being ribbed, the adaptor further including a shaft extension plug threaded into the threaded opening of the collar, the shaft extension plug having a face plate and a concentric threaded shaft which extends concentrically from the face plate, for mounting a circular saw blade with a nut being threaded on the concentric shaft to hold the circular saw blade.

Abstract: This machine is of the type comprising a frame (1) supporting a hopper (2) for charging the products, a cutting plate, an ejection plate (6a, 6b) for ejecting the cut products disposed under the cutting plate (4), and a device (13) for driving in rotation the cutting plate and the ejection plate. According to the invention, the ejection plate is driven in rotation in a direction opposed to that of the cutting plate. Advantageously, the speed of rotation of the ejection plate is higher than that of the cutting plate.

Abstract: Slicing apparatus particularly adapted for slicing raw and cooked meat includes a feed tube through which chunks of raw or cooked meat are fed under pressure against an immediately adjacent cutter which includes at least one cutting edge and forms a stop for the material in the feed tube in substantially all positions of the cutter to prevent free flow of material from the tube.The process for producing a sliced meat product includes the steps of partially cooking chunks of meat so that outside portions of the chunks reach temperatures above the temperature at which the meat is considered fully cooked while inside portions remain not fully cooked, slicing the meat chunks and adding to the slices sauce which is at a temperature above the temperature at which the meat is considered fully cooked, allowing the temperature of the meat and sauce to equalize at least to the extent that all meat reaches the temperature at which it is considered fully cooked, and portioning and packaging the product.

Abstract: A mounting for a grinding wheel serves to connect the grinding wheel to the tool spindle of a grinding machine has a holding member for the grinding wheel and a threaded fastener which separably secures the holding member to the spindle. The fastener is surrounded by an annular retaining portion of a tensioning device which has elastic prongs at one side and a compression spring at the other side of the retaining portion. The prongs are clamped between the holding member and the head of the fastener in response to rotation of the fastener in a direction to couple the holding member to the spindle, and the compression spring then reacts against the spindle so that the tensioning device maintains the fastener in form- and force-locking engagement with the holding device.

Abstract: The invention is a honeycomb core cutting tool wherein a primary cutter is used to cut the core to shape and secondary cutters are used to immediately shred that portion of the core being removed. The primary cutter is typically a commercially available circular saw blade modified by the machining of a plurality of peripherally located, radially inward directed slots dividing the primary cutter into segments which can be formed into a concave shape. A retainer threadably engages the end of the shaft and is used to force the primary cutter against a concave surface of a flange mounted to the shank of the tool, causing the primary cutter to deform into the concave shape. Mounted behind the flange and primary cutter are two "slot" cutters for shredding the portion of the core being removed.

Abstract: This quick change mechanism is a single bolt-on attachment for standard hand held power driven circular saws, to thereafter quickly install and remove diamond arbor saw blades without using any tool. A disc with a raised protruding center body is shaped to fit a standard diamond center blade, which when pressed down over this center body, is centered flat against the upper surface of the disc. The blade is then locked in place by expanding opposite undercut sections, which include the two closest points of the diamond. These expanding sections have undercut slots just above the upper disc surface and serve to wedge the blade down when moved radially outward. These resulting two wedging and sliding locks of the undercut sections are integral with radially sliding members, which move in and out in complementary "V" slots cut into the blade holding disc.

Abstract: A mechanism for mounting a sanding disk to the spindle of a portable right-angled grinder that will allow the connection to be released without extra tools. The mechanism consists essentially of a hollow spindle (18), of a tensioning anchor (22) that is accommodated inside the spindle (18) such that it can slide back and forth axially subject to an activating mechanism (54) but cannot rotate, and of two flanges that accommodate the sanding disk (28) between them, one of which, a mating flange that constitutes a support (20), is rigidly secured to the spindle, and the other of which, the tensioning flange (26), is loosely secured to the tensioning anchor (22). Between mutually facing demarcating surfaces (34 & 36) of the tensioning anchor (22) and the spindle (18) is a space (39) that communicates with another space (44) in the tensioning anchor (22). The spaces (39 & 44) are full of a plastic material (40) that can transmit force hydraulically.

Abstract: A manually actuatable produce cutter is provided including a horizontal produce receiving trough and a disc cutter assembly journalled for rotation about a horizontal axis paralleling the trough and with one sector area of the disc cutter registered with and extending across one end of the trough. The trough includes a follower plate guidingly supported therefrom for movement longitudinally of the trough toward and away from the disc cutter and the latter includes a central support shaft extending outwardly therefrom journalled from the trough and projecting toward the second end thereof. The disc cutter and shaft are axially disengageable from the trough in a direction extending outward of the first end thereof and the latch structure is provided for latching the disc cutter and shaft against axial disengagement from the trough, the latch structure, when in the release position, including portions thereof preventing movement of the following plate beyond a predetermined position toward the disc cutter.

Abstract: A device for attaching a tool in portable angled grinders, allowing the connection to be released without special accessories. The device consists essentially of a hollow driveshaft, of a spindle that slides inside it, and of a tool-securing point consisting of a mating flange and nut. The nut is loosened by activating the displacing mechanism, which displaces the spindle toward the tool-securing point, lifting the nut, which is connected to the spindle by means of a threaded pin, off of the tool. The nut can then be screwed off by hand.