Abstract: The invention relates to a tool-holder mandrel for fitting to a rotating machine, comprising: a body comprising a rear portion designed to be attached to a drive shaft of the rotating machine and a front portion in which housing are arranged converging toward the front; jaws mounted so as to slide each in a housing of the body and having an inner thread; a ring for moving the jaws, mounted so as to pivot relative to the body, having a peripheral thread interacting with the inner thread of the jaws so that the rotation of the ring closes or opens the jaws.

Abstract: The invention relates to a tool-holder mandrel for fitting to a rotating machine, comprising: a body comprising a rear portion designed to be attached to a drive shaft of the rotating machine and a front portion in which housing are arranged converging toward the front; jaws mounted so as to slide each in a housing of the body and having an inner thread; a ring for moving the jaws, mounted so as to pivot relative to the body, having a peripheral thread interacting with the inner thread of the jaws so that the rotation of the ring closes or opens the jaws.

Abstract: The chuck comprises a central part associated with jaws and furnished with peripheral gear teeth, a rotating part movable in rotation about the central part, and a clamping ring movable in rotation about the rotating part by a limited angular amount. The rotating part has an opening situated opposite the peripheral gear teeth and in which a locking finger is engaged which, actuated by the clamping ring, may pivot in a plane transverse to the chuck, while being guided by the walls of the opening. In the unlocked position, the finger is at a distance from the gear teeth, but, in the locked position, the finger is engaged in the gear teeth and allows the central part to rotate only to the right.

Abstract: The invention concerns a mandrel comprising a body (2) wherein are mounted, guided in translation, several jaws (7) which converge forward to clamp a tool. Each jaw (7) has a rectangular cross-section, and is guided in a groove with complementary profile provided in the body, the orientation of each jaw (7) is such that its side (10) facing inside is located in a plane substantially tangent to a circle (12) centered on the axis of the mandrel, and each jaw (7) is positioned in the body such that the longitudinal median plane (P) of its side (10) facing inside is offset relative to the contact line on a circle (12) centered on the axis of the mandrel and representing the shank of a tool, so as to provide a contact with said circle an edge (13), called active edge, delimiting said inner side (10), and located in front or tangent in the clamping direction.

Abstract: A chuck includes: a body attached to a rotating machine, carrying jaws; a peripheral nut fixedly attached to the body rotatably in a clamping direction; a ring that can be moved about the nut according to a limited angular amplitude, and having a considerable weight; and a spring connecting the nut and the ring. The nut includes a tooth interacting with a tooth of the ring to operate the ring in the clamping direction. When the body rotates in an unclamping direction, the ring, due to its inertia, does not follow the rotary movement of the nut. Then, when the machine stops and under the effect of the spring, impacts the tooth of the nut causing the jaws to clamp.

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: The chuck comprises a central part associated with jaws and furnished with peripheral gear teeth, a rotating part movable in rotation about the central part, and a clamping ring movable in rotation about the rotating part by a limited angular amount. The rotating part has an opening situated opposite the peripheral gear teeth and in which a locking finger is engaged which, actuated by the clamping ring, may pivot in a plane transverse to the chuck, while being guided by the walls of the opening. In the unlocked position, the finger is at a distance from the gear teeth, but, in the locked position, the finger is engaged in the gear teeth and allows the central part to rotate only to the right.

Abstract: Tool-holder chuck for fitting to a rotating machine The invention relates to a tool-holder chuck for fitting to a rotating machine, comprising: a front clamping portion comprising a first axial recess, designed to receive a tool, opening to the outside at a first end for insertion of the tool and delimited, at a second end, by a first bottom wall, the front clamping portion also comprising means for clamping the tool, a rear portion comprising a second axial recess designed for engaging a rotating spindle, opening to the outside at a first end for engaging the spindle and delimited by a second bottom wall at a second end, the first and second bottom walls being traversed by an opening connecting the first and second recesses.

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 means 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 means which can be actuated by an axial movement of the sleeve and make it possible to prevent the radial locking means from being actuated. Sequencing means are designed to prevent the axial locking means from passing into the locked position while the radial locking means are not in the locked position.

Abstract: The central component of the chuck supports jaws that can be moved between a tool clamping position and a released position. Each jaw comprises a seat that is open towards the axis and has a back and lateral faces. A roller is fitted against the back of the seat and is rotatable about its axis parallel to the axis and translationally movable between the two lateral faces of the seat. The back of the seat forms a very flat V, in the center of which the roller positions itself when an operator tightens the jaws on the tool. Then, when the chuck is rotated, to the right, the roller rolls without sliding on the jaw and on the tool until it is wedged against the straight lateral face of the seat. Excellent clamping of the tool is thus obtained.

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: 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: Chuck comprising a cage in which there are mounted, and guided translationally, multiple jaws converging in the forward direction to grip a tool. The cage is made from at least one flat piece of sheet metal that is cut, folded and/or stamped to form inward-facing grooves for guiding the jaws, and that is closed on itself to form a tubular cage serving to house the jaws and other components, notably jaw driving components.

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: 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 includes a body mounted on the motor shaft of a machine. A plurality of jaws is mounted to slide in bores and converge forward. A sleeve surrounds the body and is mounted to pivot around the latter. The jaws have an outer threaded part which meshes with a nut surrounding the jaws and integral with the sleeve surrounding the body. A series of balls is interposed between the face of the nut which faces rearward and the body of the chuck. The balls abut a ring made of a hard material, and that ring in turn abuts a ring made of synthetic material which exhibits shock-absorbent characteristics and is locked against the body.

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.