Abstract: A chuck device that prevents wear of ratchet teeth is provided. The chuck device includes a rotary sleeve which is rotated so that jaws inserted into a hole provided in a tip end of a body are slidingly opened and closed to thereby clamp a tool. Ratchet teeth forming an annular shape are provided in the body, an annular rotary member threadedly engaged with the jaws and rotated together with the rotary sleeve is fitted around the body inside of the rotary sleeve, a retainer spring member detachably engaging with the ratchet teeth is disposed outside of the ratchet teeth and the retainer spring member is provided so as to rotate a circumference of the ratchet teeth in accordance with the rotation of the rotary member. The ratchet teeth are formed of a harder member than the body, and the harder member is a discrete member from the body.

Abstract: A automated chuck is provided with at least three user selectable operating modes, thereby enabling different functions to be performed during tightening and loosening of the chuck. In one exemplary implementation, the different user selectable operating modes of the chuck may be used to actuate a motor direction switch of the drill.

Abstract: A chuck is provided with a body, a plurality of jaws and an adjustment ring. The adjustment ring is threadably engaged with the jaws. When the adjustment ring is rotated in one direction, the jaws tighten by moving closer to each other. When the adjustment ring is rotated in the opposite direction, the jaws loosen by moving away from each other. An impact member is also provided for engagement with the adjustment ring. When the drive shaft of the power tool is rotated, the adjustment ring impacts against the impact member. As a result, the adjustment ring and the body of the chuck rotate relative to each other causing the jaws of the chuck to loosen or tighten depending on the direction the drive shaft is rotating.

Abstract: A chuck is provided with a body, a plurality of jaws and an adjustment ring. The adjustment ring is threadably engaged with the jaws. When the adjustment ring is rotated in one direction, the jaws tighten by moving closer to each other. When the adjustment ring is rotated in the opposite direction, the jaws loosen by moving away from each other. An impact member is also provided for engagement with the adjustment ring. When the drive shaft of the power tool is rotated, the adjustment ring impacts against the impact member. As a result, the adjustment ring and the body of the chuck rotate relative to each other causing the jaws of the chuck to loosen or tighten depending on the direction the drive shaft is rotating.

Abstract: A chuck with a generally cylindrical body having a tail section configured to receive a drive shaft of a driver and a nose section having an axial bore formed therein. A plurality of jaws is movably disposed with respect to the body. A nut is rotatably mounted about the body and operatively engages the jaws. A sleeve is non-rotatably coupled to the nut. A shield cap is rotatably secured about the nose section of the body. The chuck also includes a first ring and a second ring that rotates relative to the nut over a limited arc. One of the first ring and the second ring defines a ratchet and the other defines at least one deflectable tab that is biased toward and engages the ratchet.

Abstract: A power drill chuck comprising a drill body, a nut, jaws, a front sleeve, a rear sleeve, a nut sleeve, and a rolling body, wherein jaws are mounted in inclined holes in the drill body. The nut thread constitutes a thread drive with the thread of the jaws. The front sleeve is connected with the drill body, wherein the nut sleeve is connected to the nut and extends backwards in a rear end having a plurality of projecting keys. The rear sleeve is mounted with and rotates relative to the nut sleeve and the drill body. The rear sleeve includes annular holes and a plurality of keys on its inner end surface. A positioning sleeve is connected to the drill body to position the rear sleeve on the drill body. A plurality of impact members are provided with a plurality of elastic deformation portions and projecting keys.

Abstract: A chuck for use with a manual or powered driver having a housing and a rotatable drive shaft, the chuck including a generally cylindrical body with a nose section and a tail section. The tail section has an internal cavity formed therein and the nose section has an axial bore formed therein. A nut is disposed within the internal cavity, the nut including a central bore. A spindle includes a forward portion extending into the central bore of the nut and a rear portion configured to receive the drive shaft. A plurality of jaws are movably disposed with respect to the body, each of the jaws are in communication with the axial bore and are operatively coupled to the nut, and a sleeve is disposed about the body. The nut is axially movable with respect to the spindle between a first position and a second position. The nut is rotatably fixed to the spindle in the first position and non-rotatably fixed to the spindle in the second position.

Abstract: A chuck for use with a manual or powered driver having a rotatable drive shaft, the chuck having a generally cylindrical body member having a nose section and a tail section. A plurality of jaws is slidably positioned in the body, and each jaw has a jaw face formed on one side thereof and threads formed on the opposite side. A nut is rotatably mounted on the body in engagement with the jaw threads so that rotation of the nut moves the jaws axially within the passageways. A tightening indicator having a first ring received operatively between the jaws and the body and a second ring rotationally coupled to and in operative engagement with the sleeve and the first ring.

Abstract: Sliding in the body of the chuck are jaws whose external thread is engaged with the internal thread of a nut mounted to rotate on the body. The nut is rotated by a sleeve, allowing the jaws to move. The chuck includes radial locking device which can be actuated by a rotation of the sleeve so as to inhibit rotation of the nut with respect to the body, and axial locking device which can be actuated by an axial movement of the sleeve and make it possible to prevent the radial locking device from being actuated. Sequencing device is designed to prevent the axial locking device from passing into the locked position while the radial locking device is not in the locked position.

Abstract: A drill chuck has an externally toothed body, a plurality of jaws, and a tightening ring rotatable on the body in tightening and loosening directions. Screwthreads between the tightening ring and the jaws move the jaws radially. A pawl engageable with the teeth is angularly fixed on the tightening ring and can shift between a retaining position engaging the teeth and a freeing position disengaged from the teeth. An adjustment sleeve is limitedly angularly displaceable on the body relative to the tightening ring between a locked end position and an unlocked end position. A cam on the adjustment sleeve can displace the pawl into the retaining position when the adjustment sleeve is in the locked end position and into the freeing position when the adjustment sleeve is in the unlocked end position. A locking part can engage the pawl in the retaining position thereof to lock the chuck.

Abstract: A keyless chuck having both an automatic locking feature and a manual locking feature. The automatic locking feature provides for automatic locking of the chuck in a tightened state when a predetermined tightening torque has been exceeded. The chuck can be utilized with only the automatic locking feature engaged. If desired, a manual locking feature can also be engaged wherein rotation of the outer sleeve relative to the body is prevented. A retaining feature can be employed to inhibit the movement of the manual locking feature between a locked and unlocked position. The retaining feature thereby avoids accidental engaging or disengaging of the manual locking feature.

Abstract: A drill chuck has a chuck body, a holder body, and an outer sleeve surrounding the bodies, with jaws between them. A ring of teeth on one of the bodies can be engaged by a pawl angularly fixed on the other of the bodies. When engaged, the pawl and the array of teeth allow rotate relative to the chuck body in a tightening direction but not in a loosening direction. Respective interengaging stops on the other body and on the outer sleeve limit relative angular movement of the outer sleeve on the other body between a pair of angularly offset end positions. An inner control sleeve has a cam formation engageable with the pawl in only one of the end positions to hold the pawl in the freeing position. The pawl is biased by a spring in the other end position into the locking position.

Abstract: The present invention relates to a self-tightened reverse locking chuck, comprising: a body member, a nut, jaws, a bearing, a drive sleeve, a front sleeve, an annular drive member, a movable ratchet wheel, a reverse locking ratchet wheel, a detent lock ring, a control ring and a control ring outer sleeve. The drive sleeve is positioned in a central hole in the rear end of the body member via a spring ring, drive keys on the drive sleeve can drive the annular drive member and the detent lock ring to rotate, in the chucked state, locked by the control ring. The chuck according to the present invention has the function of self-tightening, preventing the clamping force from being excessive, and of performing reverse rotation operation. The chuck is easy to assembly and disassembly, a tool shank clamped by the chuck will not be loosened due to vibration or shock, and the chuck is adapted for use in tools with various type of shank.

Abstract: A surgical instrument holder has a shank having a coupling end, a handle attached to an opposite end of the shank, a coupling device, and a locking mechanism. The coupling end has an interface thereon for receiving an instrument. The locking mechanism has an annular locking component, a spring, a ring which slides on the shank, and a locking device. The annular locking component is mounted so as to slide along the shank. The locking device cooperates with the locking component so as to lock the instrument onto the interface. The spring biases the locking component in a locking direction and bears on the ring. The ring is disengageably lockable to the shank via a connection device so as to enable quick disassembly for cleaning and component sterilization.

Abstract: A quick-action chuck, in particular for a power tool, has an actuating element (20) and a control device which includes at least one mechanism (12, 22, 36, 42, 50) for controlling at least one locking device (10) that serves to absorb a chucking reinforcement force via the locking device (10) that is controllable by the control device, a positive-engagement connection can be brought about for absorbing the chucking reinforcement force.

Abstract: A chuck for use with a manual or powered driver having a chuck body, jaws, a nut, a front sleeve, a rear sleeve, and a nut jacket is provided, wherein the jaws are respectively and operatively inserted into a plurality of angled bores uniformly distributed around the chuck body, the threads of the nut engages with that of the jaws to form a thread driving mechanism, the nut jacket is fixed onto the nut, a toothed member is fixed to the front portion of the chuck body, a plurality of elastic elements are formed at the front end of the nut jacket, a plurality of grooves are formed on the inner circumference wall of the front sleeve, wherein the positioning state of the elastic elements of the nut jacket can be controlled through the grooves of the front sleeve, and locking detents of the nut jacket and ratchets of the toothed member engage to form a locking mechanism, therefore the loosening of the drill tools due to the vibration or impact while using can be prevented.

Abstract: A drill chuck has a chuck body centered on and axis, and a tightening element surrounding the body and rotatable thereon about the axis. The tightening element has a front sleeve formed with jaw-holding guides and a rear sleeve releasably coupled with the front sleeve. A retaining ring bears axially forward on the sleeve. Releasable locking formations on the ring and body are relatively displaceable between a retaining position preventing axial rearward shifting of the ring and sleeve on the body and a freeing position permitting such shifting. A pusher rotationally coupled to the jaws bears axially forward on the jaws. Interengaging screwthreads on the pusher and chuck body are provided so that relative rotation of the sleeve together with the jaws and pusher relative to the chuck body axially displaces the jaws between their positions.

Abstract: This is a chuck for equipping a rotary machine, comprising a body intended to be fixed to a drive shaft of the machine, in which there are mounted several jaws which slide in bores converging forward and which each have an outwardly facing threaded part, a sleeve being pivotably mounted on the body and having an interior wall which collaborates with a nut itself engaged with the threaded exterior part of the jaws. The body comprises, in its region covered by the nut, a peripheral set of teeth and the nut bears locking means which are intended to engage in the set of teeth of the body when the chuck is in the tightened position, and which are intended to be activated by the sleeve. The sleeve has an angular relative movement with respect to the locking means between an unlocked position in which the sleeve turns the nut and a locked position in which the chuck is in its tightened position.

Abstract: A chuck for equipping a rotary machine includes a body intended to be fixed to a drive shaft of the machine, in which there are mounted several jaws which slide in bores converging forward and which each have an outwardly facing threaded part, a sleeve being pivotably mounted on the body and having an interior wall which collaborates with a nut itself engaged with the threaded exterior part of the jaws. The body includes, in its region covered by the nut, a peripheral set of teeth and the nut bears locking means which are intended to engage in the set of teeth of the body when the chuck is in the tightened position, and which are intended to be activated by the sleeve. The sleeve has an angular relative movement with respect to the locking means between an unlocked position in which the sleeve turns the nut and a locked position in which the chuck is in its tightened position.

Abstract: A keyless chuck is provided, comprising a generally cylindrical body having a forward and rearward portion with respect to an axis, the forward portion including a radially outwardly projecting portion of the body. The body further includes a plurality of guides extending obliquely to the axis and converging toward the forward section, and a groove extending around the body. Each of a plurality of jaws is slidably disposed within a respective guide and includes a thread section along an outer surface thereof. A jaw-engaging mechanism is configured to operably engage the groove so as to be rotatable around the body, and includes a thread section configured to complementarily engage the thread sections of the jaws. A sleeve extends over the jaw-engaging mechanism. A retaining member is disposed substantially within the sleeve, and is operably engaged with and extends between the body and the sleeve, rearwardly of the radially outwardly projecting portion of the body.

Abstract: A drill chuck has a chuck body centered on and rotatable about an axis and having a screwthread, a main sleeve axially fixed but rotatable about the axis on the body and formed centered on the axis with a plurality of angled forwardly open guides, and respective clamping jaws displaceable in the guides. A pusher axially engageable with clamping jaws is axially forwardly displaceable relative to the chuck body to shift the clamping jaws axially forward and radially inward in the respective guides and axially rearwardly displaceable relative to the chuck body to shift the clamping jaws axially rearward and radially outward in the respective guides. A coupling jaw threadedly engaging the screwthread of the chuck body is engageable with the pusher for axially coupling the coupling jaw to the pusher. The sleeve is coupled positively to the coupling jaw for joint rotation therewith.

Abstract: A self-locking drill chuck device includes a body, a nut, jaws, a front sleeve, a rear sleeve, a nut jacket and a rolling member. Three jaws are respectively and operatively inserted into three angled bores uniformly distributed around the body, the threads of the nut engages with that of the jaws to form a thread driving mechanism. A ratchet wheel is fixedly mounted at a rear portion of the body, a disk spring is provided between the rolling member and a load carrying shoulder of the body, the front portion of the body has key slots and an annular connecting groove, the rear end of the nut jacket has a plurality of driving grooves and keys on which a locking elastic element and a driving elastic element are respectively fixed. The drill chuck has a simple structure, convenience of operation and high working stability and reliability of self-locking capacity.

Abstract: A keyless chuck is provided, comprising a generally cylindrical body having a forward and rearward portion with respect to an axis, the forward portion including a radially outwardly projecting portion of the body. The body further includes a plurality of guides extending obliquely to the axis and converging toward the forward section, and a groove extending around the body. Each of a plurality of jaws is slidably disposed within a respective guide and includes a thread section along an outer surface thereof. A jaw-engaging mechanism is configured to operably engage the groove so as to be rotatable around the body, and includes a thread section configured to complementarily engage the thread sections of the jaws. A sleeve extends over the jaw-engaging mechanism. A retaining member is disposed substantially within the sleeve, and is operably engaged with and extends between the body and the sleeve, rearwardly of the radially outwardly projecting portion of the body.

Abstract: To provide a chuck device for preventing the loosening of the fastening condition, a plurality of claws inserted into a hole provided at an end of a body are opened, closed and slid by the rotation of a rotary sleeve and a tool is clamped by means of the claws. A coating that is hard and has a low frictional coefficient as much as possible is applied to an inner surface of the hole.

Abstract: A device for rotation of disc-shaped elements of different diameter, such as matrices for manufacturing audio and video discs. The device comprises a rotatable chuck (10) in which three arms (20) distributed evenly in the peripheral direction are pivotably mounted, the arms having a radially outer stop element (22) for contact with an outer peripheral edge of a disc element inserted in the chuck. The chuck has a rotatably mounted central gearwheel (18) which is preloaded by the tension spring elements (28) towards a rotational position in which the central gearwheel (18) tends to hold the arms (20) and their stop elements (22) in a pivoted-in position in the chuck. The arms (20) are synchronously pivotable towards a pivoted-out position counter to the action of the tension spring elements (28). The device comprises a retaining mechanism (30-40) which is configured to lock the rotation of the central gearwheel (18) relative to the base plate (16) when a predetermined speed of the chuck (10) is reached.

Abstract: A chuck device in which a plurality of claws provided at an end of a body are opened, closed and slid by the rotation of a rotary sleeve and a tool is clamped by means of the claws. An annular ratchet wheel is provided on the body. An annular nut member to be engaged with the claws and to be rotated together with the rotary sleeve is fitted in the body inside of the rotary sleeve. A retainer spring member detachably retained with a tooth of the ratchet wheel is arranged outside of the ratchet wheel, the retainer spring member is arranged to rotate around the ratchet wheel in accordance with the rotation of the nut member, the retainer spring member is mounted on the nut member by convex/concave engagement means.

Abstract: A chuck is provided having a body, oblique guides converging toward a forward portion of the body, and a groove around the body. A slidable jaw within each guide includes outer threads. A rotatable mechanism engaging the groove includes threads for engaging the jaw threads. A toothed member extends around the body. An inner sleeve extends over and rotates the mechanism, while moving the jaws toward the forward portion. An outer sleeve extends over the inner sleeve. A metal intermediate sleeve between the inner and outer sleeves engages two spring members engaged with the inner sleeve. A first torque application rotates the intermediate sleeve with respect to the inner sleeve and causes one of the spring members to ratchet with the toothed member. A greater second torque application to the intermediate sleeve causes the other spring member to prevent rotation between the intermediate and inner sleeves.

Abstract: A chuck device is provide with an annular ratchet tooth wheel in a body, an annular nut member that engages with claws nd rotates together with a rotary sleeve, and a retainer spring member for engaging the ratchet tooth wheel. The retainer spring member is rotated around the ratchet wheel in accordance with rotation of a retainer spring receiving sleeve within the retainer spring receiving sleeve t at rotates together with a nut member and that is fitted around the nut member and made of metal. The retainer spring member is mounted on the retainer spring receiving sleeve by a convex/concave engagement means. A retainer working portion is provided in a working sleeve, for rotating with the retainer spring receiving sleeve.

Abstract: A drill chuck has a body formed with an axially forwardly open tool-receiving recess and with a plurality of angled guides opening axially forward in the recess. Respective jaws axially and radially displaceable in the guides are each formed with a row of teeth. A tightening ring axially fixed but rotatable about the axis on the body has a screwthread meshing with the teeth so that rotation of the ring displaces the jaws in their guides. An adjustment sleeve is rotatable about the chuck axis on the body. The body has rearward of the tightening ring an outer surface directed toward an inner surface of the adjustment sleeve. Mechanism inside the adjustment sleeve couples the adjustment sleeve to the tightening ring. A support washer has an inner periphery axially fixed to the outer body surface and an outer periphery axially fixed to the inner adjustment-sleeve surface.

Abstract: A drill chuck has a body formed with an axially forwardly open tool recess and holding a plurality of tool-gripping jaws. A socket formed with an axially forwardly open polygonal-section seat is nonrotatable in a seat of the chuck body and axially displaceable in the chuck body into and out of a tool-releasing position. A latch is radially displaceable in the socket in the tool-releasing position of the socket between an inner retaining position projecting radially into the seat and an outer freeing position clear of the seat and projecting radially into the pocket. The latch is aligned radially with the pocket only in the tool-releasing position. The chuck body engages the latch and forces it into the inner retaining position.

Abstract: An anti-slip type electric drill chuck mainly includes a body which is obliquely provided with three pawls for clamping a drill head. The outer surface of one end of the three pawls is provided with a threaded surface for engaging a tapered threaded hole in a bearing nut, which has an outer end with teeth, an end portion provided with a ball ring. A check nut protective sleeve encloses the ball ring and bearing nut, and has elastic pointed portions engage the teeth. A drive annular block engages the inner wall of the bearing nut. A front housing sleeve engages the drive annular block and surrounds the aforesaid components. The front housing sleeve is rotated by hand to advance or retract the pawls to thereby loosen or tighten drill head. When the pawls clamp the drill head, the check nut protective sleeve stabilizes the bearing nut to prevent slippage thereof.

Abstract: A drill chuck has a chuck body rotatable about a chuck axis and formed centered on the axis with an axially forwardly open tool receiving hole, an array of axially extending guides opening axially forward into the hole, a rear axially forwardly directed shoulder and a front axially forwardly directed shoulder. Respective externally toothed jaws axially displaceable in the guides mesh with an internally threaded actuating ring rotatable on the chuck body about the axis to axially displace the jaws in the respective guides. An elastically deformable support washer bears axially forward on the actuating ring and has an inner periphery bearing axially backward on the rear chuck-body shoulder. The washer bears on the rear chuck-body shoulder over a radial distance equal to at most one-half its radial dimension such that the support ring projects at least halfway from the chuck body.

Abstract: A chuck includes a generally cylindrical body having a nose section and a tail section. A plurality of jaws are movably disposed with respect to the body to and away from the chuck's axial bore. A generally cylindrical sleeve is in driving communication with the jaws. The sleeve engages the body or the jaws by a first set of interengaged threads so that relative rotation between the first threads drives the jaws toward or away from the chuck axis. The sleeve engages the body or the jaws by a second set of interengaged threads so that relative rotation between the second threads drives the jaws toward or away from the chuck axis. The first thread set defines a first pitch so that when the jaws close, the first threads rotationally lock in the closing direction. The second thread set defines a second pitch that is higher than the first pitch so that when the jaws close, the second threads are relatively rotatable in the closing direction.

Abstract: To provide a chuck device for avoiding loosening of the fastened condition, in which an annular ratchet tooth wheel is provided in a body, an annular nut member that engages with the claws and rotates together with the rotary sleeve is provided inside the rotary sleeve and behind the ratchet wheel within the body, a retainer spring member that is composed of a leaf spring made of metal and detached and attached for engaging the ratchet tooth wheel is disposed outside of the ratchet tooth wheel, the retainer spring member is provided under the condition the retainer spring member is rotated around the ratchet wheel in accordance with a rotation of a retainer spring receiving sleeve within the retainer spring receiving sleeve that rotates together with the nut member and that is fitted around the nut member and made of metal, the retainer spring member is mounted on the retainer spring receiving sleeve by a convex/concave engagement means, a holder spring member that is composed of a metal made leaf spring form

Abstract: A lockable drill chuck has a body centered on and rotatable about an axis and formed with a plurality of angled guides opening axially forward at a front chuck end, respective jaws axially and radially displaceable in the guides and each formed with a row of teeth, and a tightening ring axially fixed but rotatable about the axis on the body and having a screwthread meshing with the teeth so that rotation of the inner ring on the body in a tightening direction displaces the jaws in their guides toward one other and rotation in a loosening direction displaces the jaws away from one other. A one-piece outer sleeve rotatable about the axis on the body is formed unitarily with a pressed-in radially inwardly projecting cam formation.

Abstract: A hammer is provided which enables the orientation of a tool or bit mounted within a spindle of the hammer to be rotated to the required orientation. The hammer comprises a housing part having an aperture therein in which a spindle that is mounted so that the spindle extends out of the housing through the aperture. The spindle is capable of being rotated about its axis to any of a plurality of orientations, so as to alter the orientation of a tool or bit mounted therein. A locking ring is located around the spindle which locking ring can be moved axially along the spindle into and out of engagement with the housing part, so that when the locking ring engages the housing, it prevents the spindle from rotating with respect to the housing. A grip ring is located around the spindle and can be rotated about the axis of the spindle from a first position in which it prevents disengagement of the locking ring from the housing.

Abstract: A chuck for use with a manual or powered driver having a housing and a rotatable drive shaft extending therefrom is provided. The chuck includes a generally cylindrical body member having a nose section and a tail section. Each of a plurality of jaws is slidably positioned in one of a plurality of angularly disposed passageways in the body. Each jaw has a jaw face formed on one side thereof and threads formed on the opposite side thereof. A nut is rotatably mounted on the body in engagement with the jaw threads so that rotation of the nut moves the jaws axially within the passageways. A locking member, in a first axial position, is rotatable with respect to the driver housing. In a second axial position, it operatively engages the housing and the nut so that the locking member is rotationally held to the housing and the nut so that the nut is rotationally held to the housing. The locking member is axially reciprocal between the first axial position and the second axial position.

Abstract: A chuck includes a generally cylindrical body having a nose section and a tail section. The tail section is configured to rotate with the drive shaft, and the nose section has an axial bore formed therein. A plurality of jaws are movably disposed with respect to said body toward and away from an axis of the axial bore. A generally cylindrical sleeve is mounted about the body forward of the body tail section and extends rearwardly toward and surrounds the body tail section. A disc is mounted about the body tail section and defines a plurality of radially outward extending flexible tips that engage the sleeve.

Abstract: A chuck includes a generally cylindrical body having a nose section and a tail section. A plurality of jaws are movably disposed with respect to the body to and away from the chuck's axial bore. A generally cylindrical sleeve is in driving communication with the jaws. The sleeve engages the body or the jaws by a first set of interengaged threads so that relative rotation between the first threads drives the jaws toward or away from the chuck axis. The sleeve engages the body or the jaws by a second set of interengaged threads so that relative rotation between the second threads drives the jaws toward or away from the chuck axis. The first thread set defines a first pitch so that when the jaws close, the first threads rotationally lock in the closing direction. The second thread set defines a second pitch that is higher than the first pitch so that when the jaws close, the second threads are relatively rotatable in the closing direction.

Abstract: A chuck for use with a manual or powered driver having a housing and a rotatable drive shaft extending therefrom is provided. The chuck includes a generally cylindrical body member having a nose section and a tail section. Each of a plurality of jaws is slidably positioned in one of a plurality of angularly disposed passageways in the body. Each jaw has a jaw face formed on one side thereof and threads formed on the opposite side thereof. A nut is rotatably mounted on the body in engagement with the jaw threads so that rotation of the nut moves the jaws axially within the passageways. A locking member, in a first axial position, is rotatable with respect to the driver housing. In a second axial position, it operatively engages the housing and the nut so that the locking member is rotationally held to the housing and the nut so that the nut is rotationally held to the housing. The locking member is axially reciprocal between the first axial position and the second axial position.

Abstract: A chuck includes a generally cylindrical body having a nose section and a tail section. A plurality of jaws are movably disposed with respect to the body to and away from the chuck's axial bore. A generally cylindrical sleeve is in driving communication with the jaws. The sleeve engages the body or the jaws by a first set of interengaged threads so that relative rotation between the first threads drives the jaws toward or away from the chuck axis. The sleeve engages the body or the jaws by a second set of interengaged threads so that relative rotation between the second threads drives the jaws toward or away from the chuck axis. The first thread set defines a first pitch so that when the jaws close, the first threads rotationally lock in the closing direction. The second thread set defines a second pitch that is higher than the first pitch so that when the jaws close, the second threads are relatively rotatable in the closing direction.

Abstract: A drill chuck has a chuck body rotatable about a chuck axis and formed centered on the axis with an axially forwardly open tool receiving hole, an array of axially extending guides opening axially forward into the hole, a rear axially forwardly directed shoulder and a front axially forwardly directed shoulder. Respective externally toothed jaws axially displaceable in the guides mesh with an internally threaded actuating ring rotatable on the chuck body about the axis to axially displace the jaws in the respective guides. An elastically deformable support washer bears axially forward on the actuating ring and has an inner periphery bearing axially backward on the rear chuck-body shoulder. The washer bears on the rear chuck-body shoulder over a radial distance equal to at most one-half its radial dimension such that the support ring projects at least halfway from the chuck body.

Abstract: A chuck includes a generally cylindrical body having a nose section and a tail section. The tail section is adapted to rotate with the drive shaft, and the nose section has an axial bore formed therein. A driver is axially movably disposed about the body. A generally cylindrical sleeve is rotatably mounted about the body. A grip is mounted in the body in communication with the axial bore and in operative communication with the driver. The driver is in communication with the sleeve and the body so that, in a first state of the chuck, rotation of the sleeve with respect to the body in a closing direction moves the grip toward the axis of the axial bore and so that, in a second state of the chuck, the driver is axially reciprocal with respect to the sleeve and the body.

Abstract: A combination type electric drill chuck structure is mainly mounted on an electric drill. The chuck includes a drive body having head and tail ends, the middle thereof being provided with multiple inclined grooves for receiving multiple clamp pawls; a fixed shell secured fittingly at the tail end of the drive body; a sleeve threaded seat threadedly provided at head end of the drive body for engagement with the clamp pawls; a percussion ring provided with a spring for engaging the sleeve threaded seat in normal condition; a movable shell that utilizes an adjusting ring to adjust upper and lower positions. When the user turns the adjusting ring, the position of the movable shell can be adjusted to engage or disengage the sleeve threaded seat or fixed shell so as to achieve various operating modes of automatic percussion locking, manual locking and locking positioning of the drill bit.

Abstract: A chuck includes a generally cylindrical body, a plurality of jaws and a driving disk. A bearing includes a first race, a second race and a plurality of bearing elements disposed between the first race and the second race. The first race defines a plurality of recesses therein. One of the second race and the bearing elements is disposed in communication with the first race so that, when the jaws close onto a tool and the first race and the second race rotate relative to each other, the one of the second race and the bearing elements engages successive recesses.

Abstract: A chuck includes a generally elongated body having a tail section configured to rotate with the drive shaft and a nose section having an axial bore formed therein. A plurality of jaws are movably disposed with respect to the body to and away from the axial bore. A collar in axially driving engagement with the jaws is axially movably disposed with respect to the body so that movement in a first axial direction drives the jaws toward the axis and movement in the opposite direction moves the jaws away from the axis. The collar is configured to receive at least one of the body and a shaft and defines a first surface that faces a second surface defined by the body or the shaft when the same is received by the collar. The first surface is tapered in the axial direction from a first end to a second end of the fist surface so that a first radial distance between the second surface and the first end is less than a second radial distance between the second surface and the second end.

Abstract: A chuck includes a generally cylindrical body and a plurality of jaws moveably disposed with respect to the body in communication with the body's axial bore. A generally cylindrical sleeve is rotatably mounted about the body in operative communication with the jaws so rotation of the sleeve in a closing direction moves the jaws towards the axis of the axial bore and rotation of the sleeve in an opening direction moves the jaws away from the axis. A bearing has a first race adjacent the body, a second race adjacent the sleeve and at least one bearing element disposed between the first race and the second race. One of the first race and the second race defines a ratchet. The other of the first race and the second race defines a pawl biased toward the ratchet. The ratchet and the pawl are configured so that when the pawl engages the ratchet, the ratchet and pawl prevent the second race from rotating in the opening direction with respect to the first race.

Abstract: A drill/driver chuck mechanism has a cylindrical member 2 with a central axial bore 4. A plurality of further bores 6 are slanted with respect to the central axial bore 4. Jaws 8 each associated with a bore 6 are moveable via a jaw actuator 10. A jaw locking means 32-60 is coupled to the jaw actuator 10. The jaw locking means may move between an open position and a closed position such that the jaws may be locked within their respective bore 6 regardless of the degree of protrusion of the jaws 8 into the central axial bore 4.

Abstract: A drill chuck has a body having a front part and a rear part, and formed with a plurality of angled guides opening axially forward at the front part. Respective jaws axially and radially displaceable in the guides are each formed with a row of teeth engaging an internal thread of a one-piece and unsplit tightening ring axially fixed but rotatable about the axis on the chuck-body front part and having an inner diameter greater than an outer diameter of the chuck-body front part. Thus rotation of the tightening ring displaces the jaws in their guides. A one-piece and unsplit snap ring set in the chuck-body rear part bears axially forward on the tightening ring, is formed with an array of outwardly projecting teeth, and has an inner diameter greater than the outer diameter of the chuck-body front part. An adjustment sleeve rotatable about the axis on the body has a front end with a surface bearing directly on the chuck-body front part.

Abstract: A drill chuck has a body formed with an axially forwardly open tool-receiving recess and with a plurality of angled guides opening axially forward in the recess. Respective jaws axially and radially displaceable in the guides are each formed with a row of teeth. A tightening ring axially fixed but rotatable about the axis on the body has a screwthread meshing with the teeth so that rotation of the ring displaces the jaws in their guides. An adjustment sleeve is rotatable about the chuck axis on the body. The body has rearward of the tightening ring an outer surface directed toward an inner surface of the adjustment sleeve. Mechanism inside the adjustment sleeve couples the adjustment sleeve to the tightening ring. A support washer has an inner periphery axially fixed to the outer body surface and an outer periphery axially fixed to the inner adjustment-sleeve surface.

Abstract: A filter device comprises a clear plastic cylinder member with a pair of ends each bearing fittings conditioned to connect to an existing air supply line. At least one of the fittings bears a quick-release feature enabling ready access to that end of the cylinder member. The cylinder provides a housing for one or more standard cotton rolls, such as those typically used in a dental office, which provide the filtering medium. Thus, dental office personnel can visibly monitor the cotton rolls through the clear cylinder member, enabling easy viewing of the impurities captured by the cotton rolls, and determination of when replacement of the cotton rolls is necessary.