Abstract: A chuck (2) for a hand-held power tool (4), which is connected with a motor-driven spindle (6) of the power tool for joint rotation therewith, includes a locking device for securing a shaft section of an exchangeable working tool and having a circular cross-section in the chuck (2) without a possibility of axial displacement and rotation relative to the chuck (2), with the locking device having a clamping element (12; 34) for securing the shaft section (8), and an element (18) for transmitting rotation to the shaft section (8) and rotationally separated from the clamping element (12; 34) by a rotary bearing (2).

Abstract: A router bit system includes a bit (or bits) and a bit holding assembly for attaching the bit to the drive shaft of a router without the use of additional hand tools. The bit holding assembly, which is attached to the drive shaft of the router, includes a chuck having a bore for receiving a shank of the bit. A collar for engaging and releasing the bit from the bit holding assembly slides between a first position for engaging the bit and a second position for releasing the bit. The collar is biased to the first position for engaging the bit. The bit is capable of being received in a standard collet-type bit holder, such as a standard router collet or the like.

Abstract: A joint is disclosed for connecting a handle with various bits. The joint includes an insert fit in the handle, a socket connected with the insert for receiving the bits, a first locking device installed on the socket for locking long bits to the socket and a second locking device installed on the socket for locking short bits to the socket.

Abstract: A router bit system includes a bit (or bits) and a bit holding assembly for attaching the bit to the drive shaft of a router without the use of additional hand tools. The bit holding assembly, which is attached to the drive shaft of the router, includes a chuck having a bore for receiving a shank of the bit. A collar for engaging and releasing the bit from the bit holding assembly slides between a first position for engaging the bit and a second position for releasing the bit. The collar is biased to the first position for engaging the bit. The bit is capable of being received in a standard collet-type bit holder, such as a standard router collet or the like.

Abstract: A hand power tool, in particular a drill hammer or jackhammer, is disclosed, which has a guide tube (11), a tool holder (24) that can be attached interchangeably to the guide tube (11), and a locking device (23) that locks the tool holder (24) to the guide tube (11), the locking device being manually releasable by means of an axial displacement of a slide sleeve (34) oriented away from the tool holder (24). To achieve a compact connection construction, which is economical in production terms, between the interchangeable tool holder (24) and the hand power tool, the tool holder (24) is embodied as insertable by an end portion (241) into a guide portion (111) embodied on the front end of the guide tube (11), in the inner wall thereof (FIG. 1).

Abstract: A tool pot according to the present invention includes a synthetic resin portion made from thermo-plastic resin and arranged over an entire length from an opening end to a tool gripping portion. Inner surface of the synthetic resin portion is a tool attachment hole. The synthetic resin portion is provided in the vicinity of the opening end of the attachment hole with a supporting surface for supporting a tool. The synthetic resin portion includes an outer structure defining outer shape, an inner structure defining inner circumference of the tool attachment hole, a cavity provided between the outer structure and the inner structure, and joint ribs joining the outer structure and the inner structure. Each of the outer structure, the inner structure and the joint ribs has wall-thickness enough to secure rigidity of the synthetic resin portion and capable of suppressing mold shrinkage of the synthetic resin portion.

Abstract: In one aspect, the present invention provides screwdriver connectors that each include (a) a body defining (1) a first end defining a first opening and a second opening; (2) a first cavity that opens onto the first end through the first opening; (3) a second cavity, connected to the first cavity by a passage, that opens onto the first end through the second opening; (b) a locking member disposed within the passage; (c) a spring and a tensioning member disposed within the second cavity; and (d) a collar that releasably engages the first end of the body, wherein in operation the spring biases the tensioning member against the collar and against the locking member which engages a bit disposed within the first cavity, thereby immobilizing the bit within the first cavity.

Abstract: A connector (20) having an assembly (28) adapted to releasably receive an end (33) of a workpiece (22).

Abstract: A tool coupling device includes a stem having a front channel for receiving ends of tool members, and having a lateral orifice communicating with the channel of the stem for receiving a ball. The tool members each has an aperture formed in one end for receiving the ball. A barrel is rotatably engaged onto the stem, and has a peripheral bulge for selectively forcing the ball into the aperture of the tool member. A spring may bias the peripheral bulge of the barrel to engage with the ball, and to force the ball into the aperture of the tool member and to lock the tool member to the stem.

Abstract: A connector (20) having an assembly (28) adapted to releasably receive an end (33) of a workpiece (22).

Abstract: A quick release attachment tool where the rotary tool has a housing which encloses a motor with the housing having a central axis, a non-operational end portion and an operational end portion. A nose portion is formed at the operational end portion, and the nose portion has an outer annular groove disposed generally perpendicularly to the axis. The nose portion also has a non-circular element at the outer end thereof coaxial with the central axis. A rotatable shaft is connected to the motor and located along the central axis. The attachment tool includes a central cavity, an attachment end portion and a working end portion. A non-circular mating element is formed in the central cavity that matingly engages the non-circular element of the rotary tool. There is also a biased connection element provided on the attachment tool, which faces the central cavity. This biased connection element engages the annular groove of the nose portion when the attachment tool is fitted onto the rotary tool.

Abstract: A holder having a quick-connect mechanism actuated by inserting a single- or double-ended tool bit, the tool bit engaging means to force deflection of retaining means, where the retaining means actuate means for engaging the tool bit, and released by manual operation of the retaining means, whereby the tool bit is pushed out from the holder so that the user can operate the tool bit holder using one hand only.

Abstract: A chuck includes a generally cylindrical body and a plurality of jaws reciprocally disposed in the body in communication with a central bore in the body. A first detent extends radially into the central bore and is releasable in a radially outward direction. Upon insertion of an elongated tool shaft having a polygonal cross section into the bore so that a groove in the tool shaft is aligned with the first detent, the first detent engages the groove and axially retains the tool shaft. Upon movement of the jaws so that the jaw faces engage flat sides of the tool shaft, the jaws rotationally retain the tool shaft.

Abstract: The invention provides a gripper that is plugged onto a rotatable shaft with a flat locating groove in which the caps of locating spheres engage, these locating spheres being peripherally distributed in an annular groove of the shaft. As a result, the gripper is held precisely on the shaft and can be replaced without causing significant wear.

Abstract: A chuck device includes a socket, a ball, a first ring, an elastic element, a sleeve, a second ring and a spindle. The socket includes a first chamber defined therein. The first chamber includes a number of slots for receiving the corners. The socket includes a hole defined therein in communication with one of the corner-receiving slots. The ball is received in the hole for engagement with the recess defined in one of the corners of the miniature tool bit. The first ring is formed around the socket. The elastic element is mounted on the socket so as to be compressed between the ring and the annular rib, thus biasing the sleeve. The sleeve includes an annular groove defined in and an annular rib formed on an internal surface thereof. The sleeve is mounted on the socket. The second ring is connected with the sleeve for engagement with the first ring, thus retaining the sleeve on the socket. The spindle is connected with the socket.

Abstract: A chuck device includes a socket, a ball, a first ring, an elastic element, a sleeve, a second ring and a spindle. The socket includes a first chamber defined therein. The first chamber includes a number of slots for receiving the corners. The socket includes a hole defined therein in communication with one of the corner-receiving slots. The ball is received in the hole for engagement with the recess defined in one of the corners of the miniature tool bit. The first ring is formed around the socket. The elastic element is mounted on the socket so as to be compressed between the ring and the annular rib, thus biasing the sleeve. The sleeve includes an annular groove defined in and an annular rib formed on an internal surface thereof. The sleeve is mounted on the socket. The second ring is connected with the sleeve for engagement with the first ring, thus retaining the sleeve on the socket. The spindle is connected with the socket.

Abstract: A tool holder and tool combination comprises a tool holder and a tool. The tool holder comprises a compartment defined in an end thereof. The tool has an end releasably engaged in the compartment of the tool holder.

Abstract: A quick release attachment tool where the rotary tool has a housing which encloses a motor with the housing having a central axis, a non-operational end portion and an operational end portion. A nose portion is formed at the operational end portion, and the nose portion has an outer annular groove disposed generally perpendicularly to the axis. The nose portion also has a non-circular element at the outer end thereof coaxial with the central axis. A rotatable shaft is connected to the motor and located along the central axis. The attachment tool includes a central cavity, an attachment end portion and a working end portion. A non-circular mating element is formed in the central cavity that matingly engages the non-circular element of the rotary tool. There is also a biased connection element provided on the attachment tool, which faces the central cavity. This biased connection element engages the annular groove of the nose portion when the attachment tool is fitted onto the rotary tool.

Abstract: A hand power tool has a tool holder with a base body; a drive part; at least one locking body for connecting the base body of the tool holder with the drive part; a securing body which radially fixes the at least one locking body in an engaging position; an actuating element operative for unlocking the tool holder and guiding the securing body to a position which radially releases the locking body, the base body in a locking position surrounding at least a part of the drive part.

Abstract: A tool-bit holding device in a percussion tool includes a rotatable and axially-movable retainer sleeve for accommodating a shank of a tool bit. A lock member supported by the retainer sleeve is movable radially with respect to the retainer sleeve. The lock member can engage the shank of the tool bit to limit axial movement of the tool bit. A small-diameter surface portion formed by an inner surface of a fixed front cover contacts the rock member and projects at least part of the lock member inward of the retainer sleeve to engage the lock member with the shank of the tool bit when the retainer sleeve is placed at an active position. A conic surface portion formed by the inner surface of the front cover is engageable with the lock member, and is able to variably limit radial movement of the lock member as the retainer sleeve moves axially.

Abstract: A separation type hole saw, includes: a hole saw (3); a hole saw mounting metal fitting (2); a shank (5); a spherical body (13) inserted to the hole portion (12); an annular spring (14) inserted to the annular groove (15) and urging the spherical body (13) so that the spherical body (13) presses the fitting convex portion (2a) of the hole saw mounting metal fitting (2), thereby preventing the fitting recess portion (5a) of the shank (5) from being taken out from the fitting convex portion (2a) of the hole saw mounting metal fitting (2) due to the pressing operation of the spherical body (13); a center pin (6) inserted to a center portion of the shank (5) and guiding the hole saw (3) at a time of drilling a material in which a guide groove (19) is formed in an outer periphery of an end portion of the center pin (6) inserted to the shank (5); and a fitting member (22) provided in the shank (5).

Abstract: A device for holding a tool bit and selectively transmitting or releasing torque between a torque generating means and the tool bit, comprises an elongate body having a tool bit holding means at one end and a torque input shaft at the other end, the torque input shaft shaped to be accepted by a drive means of the torque generating means whereby the body rotates about a longitudinal axis with rotation of the drive means of the torque generating means, a sleeve surrounding the tool bit holding means end of the body, the sleeve biased away from the torque input shaft end of the body by a biasing means and the sleeve slidably arranged between a first end position and a second end position, and a sleeve retaining means to prevent the sleeve from sliding past the first end position and the second end position.

Abstract: A tool holder of the hollow taper shank in a tool machine is disclosed. A resisting block supported by a spring is received within a tool holder. As the short knife is disposed within the tool holder, the elastic force of the spring can be overcome. At first, a plurality of steel balls and a resisting block are pushed inversely until the front edge of an wider portion of the short knife passes through the steel ball. Now, the spring will release the energy from elastic deformation so as to enforce the resisting block to move forwards and outwards so as to return to the original position. Thereby, the knife can be firmly secured.

Abstract: A chuck device for a tool of the type having a bit on an end thereof and a drill on the other end thereof includes a spindle with a stub formed on an end thereof, a tube including a first section mounted around the stub of the spindle and a second section, a sliding sleeve slidably mounted around the tube, and a ball partially received in a transverse countersink in the second section of the tube. A first elastic member is mounted around the tube and attached between an outer shoulder of the tube and an inner shoulder of the sliding sleeve. A second elastic member includes a first end received in the stub and a second end in the tube. When the chuck device is in a condition not receiving the tool, the ball is moved out of the longitudinal hole of the tube and partially located in the annular groove of the sliding sleeve under the action of the second elastic member, and the first elastic member is in a compressed status.

Abstract: A chuck device for a tool bit includes a spindle with a stub formed on an end thereof, a tube including a first section mounted around the stub of the spindle and a second section, a sliding sleeve slidably mounted around the tube, and a ball partially received in a transverse countersink in the second section of the tube. A first elastic member is mounted around the tube and attached between an outer shoulder of the tube and an inner shoulder of the sliding sleeve. A second elastic member includes a first end received in the stub and a second end in the tube. When the chuck device is in a condition not receiving a tool bit, the ball is moved out of the longitudinal hole of the tube and partially located in the annular groove of the sliding sleeve under the action of the second elastic member, and the first elastic member is in a compressed status.

Abstract: The elongate rod shaped non-impact and non percussion drilling tool comprises: a non-impact and non-percussion drilling tool or implement formation at an outer end of the shank, a portion of the shank having a polygonal cross section at a location on the shank other than at an inner end of the shank, an annular groove in the shank which is only wide enough to receive a detent to prevent axial movement of the tool when it is received in a snap-in chuck assembly and a spline formation at an inner end of the shank. The chuck assembly includes either a polygonal drive structure in a center bore of the chuck assembly or a rotatable nose collar or an axially movable nose collar whereby a tool received in the center bore is held by friction in the polygonal drive structure or by a rotatable movement or an axial movement of the nose collar.

Abstract: The tool drive system for use with a chuck having a throughbore including an outer bore portion for receiving a tool or tool holder and an inner bore portion constructed to receive and be mounted on an outer end of a motor shaft of a power tool comprises: an insert received in the inner bore portion; structure for preventing rotation of the insert relative to the chuck; structure on the insert for engaging an inner end of a tool or tool holder; and a mechanism for holding the tool or tool holder against axial movement relative to the insert.

Abstract: The chuck assembly comprises: a chuck body having an outer end portion, an outer periphery and a central axial bore extending at least part way therethrough; a nose collar mounted on the outer end portion of the chuck body; structure for mounting the chuck body onto the outer end of a shaft of a powered drive mechanism; the outer end portion of the chuck body having at least one radially extending bore therein which extends from the outer periphery of the chuck body inwardly to an opening which opens to the central bore and which has a diameter less than the diameter of the radial bore; at least one ball or detent in the at least one radial bore; urging mechanism for urging the ball or detent into the radial bore and part way through the opening; releasing mechanism for allowing the ball or detent to move radially outwardly in the radial bore and away from the opening; and structure in the central bore for engaging a tool shank and preventing rotation of the tool shank relative to the chuck body.

Abstract: A tool holder (10) is proposed for tools inserted into machines for drilling and/or percussion operation having means for rotational driving and axial locking of a tool shank which can be inserted into a tool receptacle (11) of the respective machine, wherein a plurality of axial strips (13) which project inward radially are provided for rotational driving and at least one radially lockable locking body is provided at the tool holder (10) for locking. In order to accommodate tool shanks of two grooved shank systems with different outer diameters, two axial strips (13) which are located opposite from one another and are directed inward radially are arranged at the receptacle bore (12). The axial strips (13) are guided such that they can be released outward radially, particularly in a springing manner, wherein the axial strips (13) engage in corresponding grooves (20) of the respective inserted tool shank (19) for rotational driving.

Abstract: A chuck for a rotatable tool, such as a drill, a screw tap and the like has a chuck sleeve receivable in a machine and having a central receptacle, a sleeve provided for a tool and releasably inserted in the receptacle, the sleeve having a central main passage for a cooling and/or lubricating medium and grooves for supplying the cooling and/or lubricating medium in a longitudinal direction and outwardly of the tool, the sleeve having an axial opening adopted to extend over a whole length of a shaft of the tool for holding the shaft, the grooves for the cooling and/or lubricating medium in the sleeve being provided on an inner side of the axial opening and extending axially over a whole length of the sleeve, the grooves at one end communicating with the central passage in the chuck sleeve and at another end being axially freely open.

Abstract: The drilling tool (1) has a drilling segment (4) and a shaft segment (3) with a hexagonal cross section for a torsionally rigid connection with a conventional driving machine. A combination drilling tool having different functional segment on opposite ends thereof for performing two different and sequential work operations.

Abstract: A chuck capable of rapidly sensing trouble occurring during work is provided. The chuck comprises a base body for rotating with a spindle of a machine tool; a concave hole disposed in a stem of the base body and open at the end surface thereof; a holder inserted in the concave hole with a pressing force applied thereto in a direction of ejection, the holder being capable of holding an appropriate cutting tool A on the end thereof; a transfer mechanism for permitting a predetermined length of slide of the holder into the base body and for transferring the rotation of the base body to the holder; and an appropriate lock mechanism for maintaining the holder fitted in the base body against the pressing force, the lock mechanism being capable of unlocking the fitted holder. The trouble is sensed by maintaining the fitted holder.

Abstract: The present invention relates to a quick connection device for driving various rotary tools by use of a drive shaft surrounded by a housing. Each tool includes a shank with a groove and a coupling projection. A rotary tool holder tube is mounted on bearings in a supporting tube and is provided with a first quick connection snap coupling which includes balls surrounded by a resilient sleeve and which are capable of engaging the groove in the tool shank. The shank is coupled to the drive shaft by the coupling projection and a slot in the drive shaft. Engagement of the second quick connection coupling joining the supporting tube to the housing simultaneously blocks the resilient sleeve. The quick connection coupling device is used in a surgical instrument which enables a variety of rotary cutting tools to be operated at varying distances from the drive shaft by use of a set of intermediate spindles of various lengths having the same structure as the quick connection device.

Abstract: The chuck includes a body with an axial recess and a transverse opening intersecting the recess. First and second cam members are disposed at least partially within the transverse opening and have first and second passages, respectively, which squeeze a cylindrical, slitted inner sleeve that holds the tool shank during rotation of the chuck. The inner sleeve is spring-biased for axial movement relative to the body and has a tapered upper end that is compressed when engaging a tapered retainer sleeve and thereby retains the tool shank during nonrotation of the chuck.An outer sleeve including comolded inner and outer shells, is configured and disposed to move axially about the body. A remote actuating member effects axial movement of the outer sleeve and inner sleeves to permit insertion or withdrawal of the tool shank from the chuck.An engagement mechanism connects the chuck to a drive spindle and also has a mounting mechanism for facilitating automated mounting of the chuck to a drive spindle.

Abstract: An expansible shaft assembly has core-engagement shoes pivotally mounted to a shaft for pivoting outwardly into tight engagement with the interior of a roll core automatically in response to the application of torque to the shaft. The core-engagement shoes have core-engaging surfaces, some being pivotable outwardly in response to torque applied to the shaft in one axial direction and others being pivotable outwardly in response to torque applied in the opposite axial direction. The respective oppositely-actuated core-engaging surfaces can both be on the same engagement shoe or, alternatively, on different shoes spaced axially along the shaft. For maximizing the speed with which the core-engagement shoes engage the core in response to torque application, the core-engaging surfaces are preferably angularly offset significantly from a radial direction extending between the axis of rotation of the shaft and the pivot axis of the engagement shoe.

Abstract: A spindle sleeve (4) is provided for the rotary operation in a tool changing device on a hand-operated machine tool, especially a drill hammer for optional operation with a hammer drill or with another tool. To make rapid tool change possible with a simple design, a locking body (7), which co-rotates with the spindle sleeve (4), is mounted in at least one perforation (6) of the spindle sleeve (4). An adapter (14), on which the corresponding tool can be fixed, can be axially inserted into the spindle sleeve (4) with a guide surface (22, 23), and has depressions (13) for the locking bodies (7) for nonrotatable and axially nondisplaceable connection to the spindle sleeve (4). An outer sleeve (8), which blocks the locking bodies (7) in the depressions (13) in a locking position and radially releases them in its release position, is displaceably arranged on the spindle sleeve (4).

Abstract: The invention relates to a device for mounting a saw-blade provided with an opening to a carrier which is connected to a drive device to make a reciprocating movement, wherein the device comprises: a wall extending in the direction of movement which is suitable for contact with a side of the saw-blade; a mounting body which is rotatable opposite the wall around a shaft extending perpendicularly of the direction of movement and parallel to the wall and which is provided with a protrusion which is movable into the opening arranged in the saw-blade; and urging means for urging the mounting body to a mounting position wherein the protrusion extends into the opening arranged in the saw-blade. Mounting takes place because via the sphere the saw-blade generates a moment in clockwise direction relative to the shaft. This moment is counteracted by a moment that is generated by the friction between the actuating rod and the contact surface.

Abstract: The tool holding cartridge is male and the second cartridge holding part is female and defines a cylindrical bore with diametrically opposed apertures near the forward face of the bore, the apertures carrying ball bearings, biased, so that a substantial portion of the ball bearing intersects and projects into the cylindrical bore. Those portions of the ball bearings that do so, act as a guide and locking means for the tool holding cartridge which has a cylindrical shaft which extends into a tool holding portion into which a tool may be anchored or secured, as may be required. The tool holding cartridge has, along the outer walls of the cylindrical portion thereof, near the proximate end of the cylindrical portion, a circumferential race that intersects with the proximate ends of two diametrically opposed axially oriented lead raceways defined in the outer perimeter of the cylindrical portion and that terminate at the outer shoulder and peripheral wall at distal end of the cylindrical portion.

Abstract: A coupling device for high speed rotation applications comprised of a first member about a longitudinal axis having a collar integrally attached to a solid base and a second member about a longitudinal axis having a sleeve which is receivable within the collar. When the first and second members are rotated the sleeve expands within the collar to minimize or eliminate any clearance that may exist between the sleeve and collar. The coupling device may, among other applications, be utilized for machine tools such as milling cutters.

Abstract: A fret-saw machine comprises a base unit having a table on which a workpiece to be cut is placed, a frame member disposed in the base unit and secured to the table, an arm member having one end portion secured to the frame member and another end portion disposed above the table, a blade holder assembly having first and second slide holder units and first and second blade holder units, the first slide holder unit and the first blade holder units being disposed in the base unit and secured to the frame member and the second slide holder unit and the second blade holder unit being secured to another end portion of the arm member, blade supported at its both ends by the first and second blade holder units and a drive unit supported in the base unit by the frame member and connected to the first slide holder unit to drive the blade. The blade holder unit has a blade nipping member for firmly nipping the blade.

Abstract: A chuck for polygonal shank ends of tools, has a bushing (5) which transmits the drive force and corresponds in its cavity (8) to the polygon cross section of the shank end (32). The bushing has a window-shaped opening in which a ball (22) is arranged as pressing member which acts on the shank. Behind the bushing there is arranged an actuating sleeve (11) which is displaceable against spring action and which lies in front of support shoulders in the region of the inner edge of the opening (23). In order to obtain an optimal form of use, the ball (22) is more than twice as great as the width of the corner recess (31) lying in the axial direction of the shank. The clamping surface (19) is inclined in wedge shape in the direction of action of the spring, and extends at an angle to the longitudinal axis of the chuck which lies within a self-locking region.

Abstract: A plug-in holder (2) of a drilling tool has an axially extending central bore for receiving a centering drilling bit. The holder (2) has an opening (5) extending from the bore to its outer surface. A latching element (6) is radially displaceably supported in the opening (5). The bore (4) has inwardly projecting entrainment ridges (9). The latching element (6) holds the centering drill bit in the axial direction while the entrainment ridges (9) engage the bit for rotational displacement.

Abstract: A chuck assembly for a tool bit includes a spindle with a quick release mechanism and is adapted to prevent undesired axial retraction of the tool bit from the spindle. The tool bit includes a shank portion with a circumferential groove. A longitudinally extending bore is provided in the spindle for receiving the shank portion of the tool bit. The shank is retained in the bore by detent balls extending into the bore and against the circumferential groove. The balls are disposed around the shank in an opposing manner to help center the shank. Attempted axial extraction of the tool bit from the bore without release of the balls locks the balls against a retaining face and a biased locking shoulder preventing extraction of the tool bit from the bore.

Abstract: A machine spindle is formed with an axially centered forwardly flared large-diameter seat, provided in the seat with at least two axially and radially displaceable spindle jaws, having an axially displaceable actuating rod axially coupled with the jaws, and formed with cam formations engageable with the jaws to move same together on axial rearward displacement. A transfer body or a tool is normally also centered on the axis and formed with an axially centered rearwardly tapered small-diameter stem substantially smaller than the seat.

Abstract: The invention is a self-gradually locking chuck for drills and similar devices. It is particularly suitable for portable drills in surgical use. The chuck has a cylindrical sleeve that can be fixed axially to the shaft of a drill and predominantly tapering ferrule with lobes. The ferrule can be axially engaged with the sleeve. Means for centering a tool and at least one spring are located within a hollow space in the sleeve. The chuck also has a mounting with a passage and holes for housing jaws. The mounting and the ferrule are axially movable with respect to each other and the sleeve. Jaws, located in the holes and urged toward the axis of the chuck by the lobes, hold a tool that has been inserted between the jaws. The chuck further has an annular ring which can be screwed onto an externally threaded portion of the mounting projecting from the ferrule. The annular ring serves to engage the tool in a locked condition to prevent accidental release of the tool by the chuck.

Abstract: A socket tool for multi-faced fasteners such as nuts, bolts, and the like, having at least one resiliently biased rollably mounted retainer pin which interacts with at least one face of the multi-faced fastener to keep the multi-faced fastener received by the socket of the socket tool in axial alignment therewith irrespective of the orientation of the socket. An hexagonally shaped socket is preferred, having a resiliently biased rollably mounted retainer pin in every other face of the socket. An annular flange is provided integral with the socket wall. The annular flange has an annular slot along its periphery and further has a cut-out contiguous along every other face of the socket. Each cut-out has a width exceeding the width of the face of the socket to which it is contiguous. A retainer pin is located in each cut-out adjacent the socket. A retainer key having a straight edge and a curved edge is located in the retainer slot, the straight edge abutting the retainer pin.

Abstract: A chuck assembly for a tool bit includes a spindle with a quick release mechanism and is adapted to prevent undesired axial extraction of the tool bit from the spindle. The tool bit includes a shank portion with a circumferential groove. A longitudinally extending bore is provided in the spindle for receiving the shank portion of the tool bit. The shank is retained in the bore by detent balls extending into the bore and against the circumferential groove. The balls are disposed around the shank in an opposing manner to help center the shank. Attempted axial extraction of the tool bit from the bore without release of the balls locks the balls against a retaining face and a biased locking shoulder preventing extraction of the tool bit from the bore.

Abstract: A mechanism is disclosed for selectively releasing or retaining a bit in a rotary power tool. The mechanism includes a tool housing having an interior bore. A spindle, mateable with the bit, is mounted within the bore. A tubular release sleeve is also mounted within the bore, and is slidable between a retention position and release position. A bushing is positioned within the bore between the sleeve and the housing, with its exterior surface contacting the bore. A retention key is mounted within the spindle. The key is adapted to cooperate with the release sleeve to extend into a circumferential groove in the bit when the sleeve is in the retention position, and move away from that groove when the sleeve is in the release position. A spring is used to bias the release sleeve into the retention position, and a pin is mounted on the tool housing to hold the bushing within the housing.

Abstract: A self-gradually locking chuck for drills or similar devices particularly suitable for portable drills used in surgery. It includes a cylindrical sleeve which can be coaxially fixed to a rotating shaft, a ferrule having a conical section provided internally with lobes, a cylindrical portion at one of its ends for engagement with said sleeve and a cylindrical portion at the other end. A first mounting, perforated longitudinally by a hole, includes a central portion having locking jaws which are movable in holes in a direction convergent upon the axis of the chuck and two second mountings opposite to the central body. A spring and centering device are provided. A cylindrical ferrule is threaded to a part of the first mounting as it projects from the first-mentioned ferrule. The first mounting and ferrule move axially in relation to each other and in relation to the cylindrical sleeve in which the ferrule can be releasably secured to the cylindrical ferrule by a retaining device.

Abstract: A pad holder release mechanism for a floor treating machine enables a pad holder to quickly be released from and reattached to a motor shaft, so that a pad carried by the holder may be replaced without need to tip the machine back on its handle. The release mechanism is particularly useful with battery powdered floor treating machines, which because of their weight cannot conveniently be tipped to expose the pad, and if tipped present a risk of battery acid spillage. In use of the mechanism, the pad holder need only be elevated a few inches to lift the pad off of a surface, whereupon the mechanism allows the pad holder and pad to be removed from and replaced on the machine.