Abstract: A drill chuck has a chuck body centered on and adapt d to be rotated about a longitudinal axis and unitarily formed with a plurality of forwardly open angled guides angularly spaced about the axis and with a rim, respective jaws displaceable along the guides in the chuck body and each formed with a row of teeth, and a tightening sleeve rotatably surrounding the body. A threaded ring rotatable on the body about the axis within the tightening sleeve is fixed to the sleeve and formed with a screwthread meshing with the teeth of the jaws so that rotation of the ring in one direction moves the jaws radially together and opposite rotation moves them radially apart. This threaded ring is formed with a radially outwardly open groove covered by the sleeve. In addition the tightening sleeve has an inwardly projecting welt engaged in the groove.

Abstract: A drill chuck has a chuck body centered on a longitudinal axis and formed with a plurality of forwardly open angled guides spaced about the axis. Respective jaws displaceable along the guides in the chuck body are each formed with a row of teeth. A tightening sleeve rotatably surrounding the body is axially fixed to a ring rotatable on the body about the axis and formed with a screwthread meshing with the teeth of the jaws so that rotation of the sleeve and ring in one direction moves the jaws radially together and opposite rotation moves them radially apart, A first axially elastically deformable spring seated in the chuck body bears axially forward on the ring, and a second axially elastically deformable spring seated in the chuck body bears axially rearward on the sleeve.

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: An improved manually tightened chuck, having a hollow chuck body member, provided with three inclined bores along periphery with same interval in chuck body member. A jaw is installed in each inclined bore slidably. A nut is sheathed in the middle of chuck body member, and the nut is interconnected with each jaw through threads. A front sleeve is provided at the front end of the chuck body member, and a rear sleeve is provided at the rear end. The nut is of duplex-half type structure, on its peripheral surface a nut sleeve is sheathed, between the nut sleeve and the nut is of stationary fit, between the front sleeve and the nut sleeve a torque transmission structure is provided, the front end of rear sleeve and the rear end of front sleeve is provided with inter fitted chucking hook, by means of the chucking hook the rear sleeve and the front sleeve are connected with each other.

Abstract: A manually tightened chuck, having a hollow chuck body member, provided with three inclined bores along periphery with same interval in chuck body member. A jaw is installed in each inclined bore slidably. A nut is sheathed in the middle of chuck body member, and the nut is interconnected with each jaw through threads. A front sleeve is provided at the front end of the chuck body member, and a rear sleeve is provided at the rear end. The nut is of duplex-half type structure, on its peripheral surface a nut sleeve is sheathed, between the nut sleeve and the nut is of stationary fit. The profile of said nut sleeve is a polygon, a polygonal hole fitted with said outer profile is formed correspondingly in the inner part of said front sleeve. The machining of both front and nut sleeves of the chuck is more simple, and both front and nut sleeves are more stable after installation, during operation of the chuck no radial jitter of both front and nut sleeves is created.

Abstract: A drill chuck has a chuck body formed with a plurality of forwardly open angled guide passages and with a radially open groove having an axially rearwardly directed front face and an axially forwardly directed rear face. Respective jaws displaceable in the passages each have a row of radially outwardly directed teeth exposed at the groove. A tightening ring engaged in the groove and having an internal screwthread meshing with the teeth of the jaws is formed with a front face axially confronting the front groove face and can rotate on the body about the axis. An angled front spring washer engaged between the front faces is elastically deformable on axial forward displacement of the tightening ring to permit limited relative axial movement of the ring and body.

Abstract: A drill-chuck jaw hag an elongated metal body formed with a toothed back face and an opposite front face. The body is generally symmetrical to a longitudinal plane bisecting the back and front faces. A pair of hard-metal insert parts fixed to the front face are each formed with a projecting linear edge extending longitudinally parallel to but offset from the plane. The edges symmetrically flank the plane.

Abstract: A drill chuck has according to the invention a chuck body centered on and rotatable about an axis and having a rear end formed with an axially forwardly facing shoulder, a plurality of jaws radially displaceable in the body between a closely spaced tool-gripping position and a widely spaced tool-releasing position, and a tightening sleeve rotatable about the axis on the body and coupled to the jaws for displacing them between their positions on rotation of the sleeve on the body. An annular closure disk has an inner periphery formed with a radially deflectable part engaged axially rearwardly with the shoulder and locking the disk on the body.

Abstract: A drill chuck has a chuck body rotatable about a chuck axis and having a rear end adapted to fit with a drive spindle and a front end formed with a tool recess. A plurality of jaws angularly spaced on the body about the axis and exposed in the tool recess are radially displaceable relative to the body between inner and outer positions. A tightening ring is axially fixed but rotatable about the axis on the body. Screwthread formations between the tightening ring and the jaws can move the jaws radially together and radially apart. A tightening sleeve surrounding the body and connected to the tightening ring is adapted to be gripped by hand to rotate the ring in the directions. A shield sleeve surrounds the body between the tightening sleeve and the body front end and is supported on the body for rotation thereon about the axis independently of the body and of the tightening sleeve.

Abstract: A drill has a drive unit having a spindle rotatable about an axis and having an axially forwardly directed front end formed centered on the axis with an axially forwardly open polygonal-section socket dimensioned to fit with a standard-size bit shank, a chuck body mounted on the spindle, rotatable about the axis at the front end, and having an axially forwardly open tool recess, and a plurality of jaws displaceable in the body to grip a bit in the recess.

Abstract: A chuck for use with a manual or powered driver that may also be used for hammer drilling. The chuck is constructed so that during normal operation for its intended purpose, the jaws holding a shaft for a tool do not loosen. The chuck includes at least one pawl to engage teeth on a gear ring such that rotation of a ring driver in a jaw gripping direction causes the gear ring to rotate. When the jaws tightly grip the shaft, the gear ring will frictionally engage a portion of the chuck so that the gear ring is rotationally locked to the chuck body. At the same time, the pawl engages the gear ring such that rotation of the ring driver and thus movement of the jaws in a non-jaw gripping direction is prevented during normal use of the hammerlock chuck.

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 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: The invention is based on a quick-action chuck, in particular for a power tool, having an actuating element (20) and having a control device which includes at least one means (12, 22, 36, 42, 50) for controlling at least one locking device (10) that serves to absorb a chucking reinforcement force.

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 drill chuck has a chuck body extending along and rotatable about an axis and formed with an axially forwardly open to 1 seat and with a plurality of angled guides opening axially forward into the seat and holding respective jaws having toothed outer edges. An inner sleeve has a screwthread threadedly engaging the jaw outer edges, is axially shiftable on the body, and can rotate about the axis to axially displace the jaws. A mechanism engaged between the inner sleeve and the chuck body can axially displace the inner sleeve relative to the body and thereby axially displace the jaws.

Abstract: A grip assembly for one of a clutch cap for a clutch mechanism, a rear sleeve or front sleeve for a chuck assembly having a chuck mechanism with a plurality of adjustable jaws. The grip assembly includes an inner sleeve having open top and an open bottom opposite the top and defining a longitudinal axis with a peripheral wall disposed between the first end and the second end and an elastomeric grip comprising a plurality of spaced apart ribs extending generally circumferentially about an outer surface of the front sleeve. An optional a cover can encircle the inner sleeve and have a plurality of spaced apart apertures to receive respective ribs.

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 drill chuck comprising a main body of elongated cylindrical construction having intersecting main body end and main body side surfaces. A plurality of movable jaws of elongated cylindrical construction carried by the main body having intersecting jaw end and jaw side surfaces. A sleeve of elongated cylindrical construction carried circumferentially on the main body being operatively associated with the jaws for extending and retracting the jaws when the sleeve is rotated. The sleeve having intersecting sleeve end and sleeve side surfaces. Radiused corners provided at the intersection of the main body end and main body side surfaces, jaw end and jaw side surfaces, and sleeve end and sleeve side surfaces so that a surgical drill chuck is provided with no sharp edges to prevent snagging, tearing or puncturing surgical latex gloves while handling the chuck during surgical operations.

Abstract: A chuck for use with a manual or powered driver including a generally cylindrical body having a nose section and a tail section. The tail section defines an axial bore formed therein to mate with the drive shaft of the driver and the nose section defines an axial bore formed therein and a plurality of angularly disposed passageways formed therethrough and intersecting the axial bore. A plurality of jaws is slidably positioned in each passageway and each jaw defines a jaw face formed on one side and threads formed on the opposite side. A nut is disposed about the body for rotational movement with respect to the body and is in driving engagement with the jaw threads. A generally cylindrical front sleeve overlays the nose section of the body. A generally cylindrical nut retainer is disposed about the body and includes a frusto-conical portion.

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: To provide an excellent chuck assembly that is superior in assembling workability, may be produced in low cost and is superior in mass-production property, in which a rotary sleeve (2) provided on a body (1) is rotated, jaws (4) engaged with rotary nuts (3) are moved back and forth to be opened and closed by the rotation of the rotary nut (3) rotated together with the rotary sleeve (2) and a tool is clamped by the jaws (4), a ring member (8) is provided in the rotary nuts (3), a convex and concave engaging means is provided between the ring member (8) and the rotary sleeve (2), and the ring member (8 and the rotary sleeve 2 are retained and prevented from falling apart from each other by the convex and concave engaging means.

Abstract: A non-impact keyless chuck suitable for use with manual or powered drivers is disclosed. The chuck comprises a body which carries a rotatable split nut having a relatively fine thread and a plurality of slidable jaws, which may be identical, driven by the rotatable nut. An anti-friction bearing is disposed between the rotatable nut and a bearing thrust ring mounted on the body. A clutch or torque limiting mechanism is provided to limit the tightening torque to a predetermined value while the loosening torque may be limited or unlimited. The front sleeve, and rear sleeve, if used, may be formed from a structural plastic to reduce manufacturing costs. A relatively soft elastomeric grip boot may be placed on the front sleeve to improve the grip and temporarily restrain and center the tool during chuck tightening or loosening operations. A relatively soft elastomeric grip boot may also be placed on the rear sleeve, if used.

Abstract: A chuck for use with a manual or powered driver including a generally cylindrical body having a nose section and a tail section. The tail section defines an axial bore formed therein to mate with the drive shaft of the driver and the nose section defines an axial bore formed therein and a plurality of angularly disposed passageways formed therethrough and intersecting the axial bore. A plurality of jaws are slidably positioned in each passageway and each jaw defines a jaw face formed on one side and threads formed on the opposite side. A nut is disposed about the body for rotational movement with respect to the body and is in driving engagement with the jaw threads. A generally cylindrical front sleeve overlays the nose section of the body. A generally cylindrical nut retainer is disposed about the body and includes a frusto-conical portion.

Abstract: A drill chuck has a chuck body centered on and adapt d to be rotated about a longitudinal axis and unitarily formed with a plurality of forwardly open angled guides angularly spaced about the axis and with a rim, respective jaws displaceable along the guides in the chuck body and each formed with a row of teeth, and a tightening sleeve rotatably surrounding the body. A threaded ring rotatable on the body about the axis within the tightening sleeve is fixed to the sleeve and formed with a screwthread meshing with the teeth of the jaws so that rotation of the ring in one direction moves the jaws radially together and opposite rotation moves them radially apart. This threaded ring is formed with a radially outwardly open groove covered by the sleeve. In addition the tightening sleeve has an inwardly projecting welt engaged in the groove.

Abstract: A power driver includes a motor and a spindle having a distal end thereof opposite the motor. The distal end has an axial bore formed therein. A gear assembly is disposed operatively between the motor and the spindle so that the motor rotationally drives the spindle through the gear assembly. A grip is mounted in the spindle in communication with the axial bore. A driver is mounted about the spindle in operative communication with the grip so that activation of the driver in a closing direction moves the grip radially toward the axis and activation of the driver in an opening direction moves the grip radially away from the axis.

Abstract: A chuck includes a driver disposed on a chuck body and in engagement with the jaws so that at least one of rotation and axial movement of the driver with respect to the body opens or closes the jaws. A first detent is disposed in the body in communication with the jaws. At least one of the jaws defines a catch at a predetermined position so that the catch engages the first detent when the jaws are at a predetermined position on the body with respect to a chuck bore.

Abstract: A manually tightened chuck, having a hollow chuck body member, provided with three inclined bores along periphery with same interval in chuck body member. A jaw is installed in each inclined bore slidably. A nut is sheathed in the middle of chuck body member, and the nut is interconnected with each jaw through threads. A front sleeve is provided at the front end of the chuck body member, and a rear sleeve is provided at the rear end. The nut is of duplex-half type structure, on its peripheral surface a nut sleeve is sheathed, between the nut sleeve and the nut is of stationary fit. The profile of said nut sleeve is a polygon, a polygonal hole fitted with said outer profile is formed correspondingly in the inner part of said front sleeve. The machining of both front and nut sleeves of the chuck is more simple, and both front and nut sleeves are more stable after installation, during operation of the chuck no radial jitter of both front and nut sleeves is created.

Abstract: A drill chuck has a chuck body centered on a longitudinal axis and formed with a plurality of forwardly open angled guides spaced about the axis. Respective jaws displaceable along the guides in the chuck body are each formed with a row of teeth. A tightening sleeve rotatably surrounding the body is axially fixed to a ring rotatable on the body about the axis and formed with a screwthread meshing with the teeth of the jaws so that rotation of the sleeve and ring in one direction moves the jaws radially together and opposite rotation moves them radially apart, A first axially elastically deformable spring seated in the chuck body bears axially forward on the ring, and a second axially elastically deformable spring seated in the chuck body bears axially rearward on the sleeve.

Abstract: An improved manually tightened chuck, having a hollow chuck body member, provided with three inclined bores along periphery with same interval in chuck body member. A jaw is installed in each inclined bore slidably. A nut is sheathed in the middle of chuck body member, and the nut is interconnected with each jaw through threads. A front sleeve is provided at the front end of the chuck body member, and a rear sleeve is provided at the rear end. The nut is of duplex-half type structure, on its peripheral surface a nut sleeve is sheathed, between the nut sleeve and the nut is of stationary fit, between the front sleeve and the nut sleeve a torque transmission structure is provided, the front end of rear sleeve and the rear end of front sleeve is provided with inter fitted chucking hook, by means of the chucking hook the rear sleeve and the front sleeve are connected with each other.

Abstract: A tool holder for a power tool, such as a drill hammer, a chisel hammer, and both, includes a striking mechanism for strikingly driving a tool, a base body, a drive part on which the base body is releasably mounted, at least one locking body for releasably mounting the base body on the drive part, a component having a throughgoing passage in which the at least one locking body is arranged, a securing body which radially fixes the at least one locking body in its engaging position, an actuating element for unlocking the securing body from its locking position to an unlocking position for radially reieasing the at least one locking body, and at least one holding element which holds the at least one locking body in the unlocking position of the securing body in the throughgoing passage. The holding element is lowered or lowerable into the component having the throughgoing passage and is overrun by the securing body.

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: 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 chuck for a manual or powered driver having a rotatable driveshaft includes a body having a front section and a rear section. A plurality of jaws are operatively associated with the body, and the jaws are adapted to engage a tool to be utilized by the driver. The body's rear section includes serrations extending outwardly therefrom. A sleeve member is pressed onto the serrations whereby the serrations dig into the sleeve to at least assist in rotationally securing the sleeve to the body.

Abstract: A drill chuck has according to the invention a chuck body centered on and rotatable about an axis and having a rear end formed with an axially forwardly facing shoulder, a plurality of jaws radially displaceable in the body between a closely spaced tool-gripping position and a widely spaced tool-releasing position, and a tightening sleeve rotatable about the axis on the body and coupled to the jaws for displacing them between their positions on rotation of the sleeve on the body. An annular closure disk has an inner periphery formed with a radially deflectable part engaged axially rearwardly with the shoulder and locking the disk on the body.

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 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: A chuck that can be operated with or without a key, depending upon the amount of torque desired. The jaws are controlled by rotation of a screw ring about the axis of the chuck body that slides the jaws along jaw passages by engagement with teeth on the jaw surfaces. The screw ring is housed in a tightening knob that has a planar ring gear perpendicular to the chuck body axis. A tail section is rigidly attached to the chuck body below the tightening knob and houses a pinion gear that matingly engages the planar ring gear and rotates in concert with the tightening knob. Insertion of a hex key into a recess in the pinion gear allows the application of additional torque. Alternate embodiments incorporate a idler gear to reverse pinion gear rotation; locate the pinion gear in the tightening knob with the planar ring gear in the tail section; and utilize a planar ring gear on both the tail section and the tightening knob with a floating ring to house the pinion gear between the planar ring gears.

Abstract: A chuck includes a generally cylindrical body member having a forward section and a rearward section. The rearward section is configured to mate with a manual or powered driver. A plurality of angularly disposed passageways is formed in the forward section of the body and intersect an axial bore formed therein. The body defines a ledge portion about its outer circumference and a front face transverse to the longitudinal body axis. One of a plurality of jaws is slidably positioned in each passageway. A nut is rotatably mounted to the body rearward of the ledge portion so as to engage the jaws. A generally cylindrical sleeve engages the nut and includes a flexible protrusion extending axially rearward from an inner circumferential surface of the sleeve proximate the sleeve forward end. The protrusion has a tab portion disposed rearward of the ledge portion and projecting radially inward of the outer circumference of the ledge portion to prevent forward axial movement of the sleeve with respect to the body.

Abstract: A chuck that can be operated with or without a key, depending upon the amount of torque desired. The jaws are controlled by rotation of a screw ring about the axis of the chuck body that slides the jaws along jaw passages by engagement with teeth on the jaw surfaces. The screw ring is housed in a tightening knob that has a planar ring gear perpendicular to the chuck body axis. A tail section is rigidly attached to the chuck body below the tightening knob and houses a pinion gear that matingly engages the planar ring gear and rotates in concert with the tightening knob. Insertion of a hex key into a recess in the pinion gear allows the application of additional torque. Alternate embodiments incorporate a idler gear to reverse pinion gear rotation; locate the pinion gear in the tightening knob with the planar ring gear in the tail section; and utilize a planar ring gear on both the tail section and the tightening knob with a floating ring to house the pinion gear between the planar ring gears.

Abstract: A manually tightened chuck including a hollow chuck body member, provided with three bores inclined forwardly toward a central axis. A jaw is slidable in each inclined bore, a nut is sheathed on the peripheral surface of the chuck body member, and is interconnected with each jaw through threads. A peripheral surface of the nut is provided with a front sleeve, and on a peripheral surface of the chuck body member a rear sleeve is sheathed also. In the middle of the chuck body member a stepped part extends radially outwardly and includes a surface opposite to a rear end surface of the nut. Plural bearing balls are disposed in circular grooves formed in the opposed surfaces of the nut and chuck body member.

Abstract: A drill chuck has a chuck body centered on an axis and forming an axially forwardly open bit-receiving recess, an axially forwardly open polygonal-section seat at a base of the recess, and a plurality of jaws spaced angularly around the seat. The jaws can be displaced radially inward and outward to grip a bit in the recess. An element can move in the base of the recess between a blocking position in front of the polygonal-section seat and preventing entry of a bit thereinto and a freeing position clear of the seat and permitting entry of a bit thereinto. This element can be actuated for movement between the blocking and freeing positions either manually or automatically.

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 manually tightened chuck including a hollow chuck body member, provided with three bores inclined forwardly toward a central axis. A jaw is slidable in each inclined bore, a nut is sheathed on the peripheral surface of the chuck body member, and is interconnected with each jaw through threads. A peripheral surface of the nut is provided with a front sleeve, and on a peripheral surface of the chuck body member a rear sleeve is sheathed also. In the middle of the chuck body member a stepped part extends radially outwardly and includes a surface opposite to a rear end surface of the nut. Plural bearing balls are disposed in circular grooves formed in the opposed surfaces of the nut and chuck body member.

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 drill has a drive-unit housing having an end wall, a drive-unit spindle projecting along an axis from the wall, and a chuck body fixed to the spindle, formed with an axially forwardly open tool recess, and formed with a plurality of angled guide passages opening forward into the recess. Respective jaws displaceable in the passages are engageable in the recess with a tool. a rear plate mounted on the chuck body axially rearward of the jaws and projecting transversely of and closely axially juxtaposed with the housing end wall is formed with a hole communicating with at least one of the passages and having an outer end radially outside the end wall.

Abstract: A drill-chuck jaw hag an elongated metal body formed with a toothed back face and an opposite front face. The body is generally symmetrical to a longitudinal plane bisecting the back and front faces. A pair of hard-metal insert parts fixed to the front face are each formed with a projecting linear edge extending longitudinally parallel to but offset from the plane. The edges symmetrically flank the plane.

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 chuck includes a driver disposed on a chuck body and in engagement with the jaws so that at least one of rotation and axial movement of the driver with respect to the body opens or closes the jaws. A first detent is disposed in the body in communication with the jaws. At least one of the jaws defines a catch at a predetermined position so that the catch engages the first detent when the jaws are at a predetermined position on the body with respect to a chuck bore.

Abstract: A chuck for use with a manual or powered driver including a generally cylindrical body having a nose section and a tail section. The tail section defines an axial bore formed therein to mate with the drive shaft of the driver and the nose section defines an axial bore formed therein and a plurality of angularly disposed passageways formed therethrough and intersecting the axial bore. A plurality of jaws are slidably positioned in each passageway and each jaw defines a jaw face formed on one side and threads formed on the opposite side. A nut is disposed about the body for rotational movement with respect to the body and is in driving engagement with the jaw threads. A generally cylindrical front sleeve overlays the nose section of the body. A generally cylindrical nut retainer is disposed about the body and includes a frusto-conical portion.