Gunter H. Rohm has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: A chuck has a chuck body generally centered on and rotatable about a rotation axis, a head displaceable on the chuck body generally perpendicular to the rotation axis, and three jaws angularly generally equispaced on the head about a clamp axis offset from and substantially parallel to the rotation axis. All of these jaws are displaceable on the head generally radially of the clamp axis. An actuator is connected to the jaws for synchronously displacing same generally radially toward and away from the clamp axis. The actuator includes an actuator member displaceable axially in the head and provided with respective actuating surfaces inclined to the clamp axis and engageable with the jaws. Two of the jaws are pivotal about respective jaw axes parallel to the axes and the other jaw is displaceable in a plane substantially including the clamp and rotation axes.
Abstract: A drill chuck has a chuck body, a sleeve rotatable but axially nondisplaceable on the chuck body, and a plurality of jaws engaged between the sleeve and chuck body. Angled guides and a screwthread formed on the body, sleeve, and jaws radially displace the jaws toward each other on relative rotation of the sleeve and chuck body in a tightening direction. The sleeve and an axially displaceable locking-ring body have axially interengageable teeth that inhibit angular movement of the ring body and sleeve about the axis only in a front locking position of the ring. A projection is fixed in and extends radially from one of the bodies toward the other body which is formed with an angularly extending slot having angularly opposed and spaced end surfaces spaced apart angularly by a distance greater than the angular dimension of the projection and axially opposed and spaced side surfaces spaced axially by a distance generally equal to the axial dimension of the projection.
Abstract: The chuck or collet actuating apparatus for a machine tool comprises a rotating clamping cylinder, an axially slidable clamping piston rotating with the clamping cylinder and a coaxial cylindrical projecting portion in the clamping cylinder. The projecting portion carries a thread, on which a threaded ring is guided and engaged. This threaded ring is provided with a coaxial undercut annular groove in an opposing surface facing the clamping cylinder and is securable against rotation on the projecting portion. A plurality of stop pins are provided which are axially unshiftable relative to the threaded ring and which engage and slide in the annular groove. The stop pins project through an opposing wall of the clamping cylinder into an interior space of the cylinder axially slidable and sealing axially. These stop pins form a stop for the clamping piston limiting its displacement.
Abstract: A vise has a housing block formed with a guide defining a longitudinal direction, a fixed jaw secured to the block, a movable jaw displaceable in the direction in the guide relative to the fixed jaw, and a spindle extending in the direction between the jaws along a spindle axis. A support at the fixed jaw has a formation fitting with the fixed jaw and fixing the support and fixed jaw together against relative axial displacement while permitting limited relative pivoting about a fixed-jaw axis generally perpendicular to the spindle axis.
Abstract: An operation control device is provided for a chuck by which the rotary drive for the chuck is disengaged when the clamping motion leading to clamping of the workpiece in the chuck has not been provided or is not sufficient. The clamp jaws of the chuck are adjustable by a drive member guided axially in the chuch body which is connected to a clamping piston. The operation control device comprises a control piston which is acted on by a compressed medium against the force of a restoring spring and is locked by the drive member against the sliding caused by the compressed medium in a locked position disconnected from the rotary drive if the drive member is positioned in the end safety region of its axial displacement.
Abstract: A self-tightening drill chuck has a chuck body adapted to be mounted on a drill spindle for rotation about an axis and formed with substantially cylindrical front and a rear outer surfaces both centered on the axis and axially offset from each other and with an outwardly open groove between the front and rear surfaces. A tightening sleeve surrounding the body is formed with substantially cylindrical front and rear inner surfaces both centered on the axis and riding on the front and rear surfaces of the body and with an inwardly open groove between the front and rear inner surfaces and forming with the groove of the body an annular generally circular-section passage This sleeve also is unitarily formed with a rearwardly flared substantially frustoconical seat also centered on the axis. Rollers riding in the grooves support the sleeve on the body so as to permit relative rotation of the body and sleeve about the axis while preventing relative axial displacement.
Abstract: The clamp jaws radially adjustable by a drive member each comprise a jaw base guided in the chuck body and a mounted jaw member replacably attached with it as well as at least one connecting pin which is mounted pivotable about the pin axis in the jaw base. According to rotary position the attachment between the jaw base and the mounted jaw member is released or locked. At least one control rod guided longitudinally slidable in the jaw base is coupled with the connecting pins by gear teeth so that the motion of the control rods relative to the jaw base converts to a rotation of the connecting pin and vice versa. The feed of the control rods in the jaw base runs parallel to the feed of the jaw base in the chuck body. For the control rod a controlling member is provided by which the control rod is held fixed from motion relative to the chuck body. The jaw base is slidable for rotation of the connecting pins by its drive member with the control rods held fixed in position.
Abstract: In a lathe chuck, the jaws consist of two jaw segments, couplable with each other in different relative positions by means of a coupling member operatively linked to an actuating member by way of a positioning assembly. A latching assembly is provided for fixing in place the forward jaw part while the rearward jaw part is being moved. The latching assembly, the actuating member, and the positioning assembly are all adjustable in a linked relation to one another, so that the chuck span of the chuck jaws is automatically adjustable by the actuating member.
Abstract: The drill chuck has an adapter shaft which is held in the drill chuck nonrotatably with axial motion play and formed for receipt in a tool holder of a hammer drill machine. The hammer action of the adapter shaft is transmittable to the end of a drill held between centrally adjustable clamp jaws through an axial passage. A stop piece is carried in the drill chuck which is movable above the drill chuck axially into a position clamped and locked against the tool holder of the hammer drill machine. Hence axial motion play of the adapter shaft is prevented in both the drill chuck and also in the tool holder and the former is for all intents and purposes rigidly attached with the latter.
Abstract: A selftightening drill chuck has a chuck body having a chuck thread, a chuck sleeve, a plurality of clamp jaws which are guided slidably in the chuck sleeve inclined to the chuck axis and a locking ring on the chuck body which is rotatable between two rotational end positions and is axially slidable and is coupable in the circumferential direction with the clamping sleeve by two tooth rings. The chuck body has a conical surface extending parallel to the feed direction of the clamp jaws on which the chuck thread is located which engages with a transverse gear on each clamp jaw. A spring acts on the locking ring in a rotational direction which corresponds to the opening of the drill chuck. To limit rotation of the locking ring a stop pin fixed on the chuck body can be provided which engages in a cavity of the locking ring.
Abstract: In the clamping device a clamping head rigidly attached to the rotating spindle is provided between the rotating spindle and the tool holder which has a plurality of adjustable clamping pieces for holding the tool holder on the clamping head. A clamping rod penetrating the clamping head is provided for the tool holder in the hollow rotating spindle. This clamping rod is slidable axially under power operation, is coupled with a central clamping member of the tool holder and is rotatable relative to the rotating spindle. This clamping rod is couplable and uncouplable with the clamping member by rotation. A clamping pipe which is guided axially slidably and nonrotatably relative to the rotating spindle moves and adjusts the clamping pieces. The clamping rod is engaged in the rotation direction with the clamping pipe by the gear unit which converts the axial motion of the clamping pipe to a rotation of the clamping rod.
Abstract: The drill chuck body is connected to a drill spindle, and chuck jaws forming a retention for the drill tool can be adjusted by turning a control ring. A lock sleeve serves to secure the control ring whereby the lock sleeve, in the direction of shifting, is maintained against the control ring under the force of a spring. At least one contact head is provided at the chuck body. The contact head reaches into a recess in the wall of the lock sleeve. Each recess is formed by two axial grooves which extend adjacent to one another, but which have different lengths, and which are open at the end which is directed towards the control ring for the entry of the respective contact head. The lock sleeve can be turned on the chuck body to such an extent that either one or the other of the two grooves is axially aligned with the contact head. The contact head is extended in the longitudinal direction of the grooves to provide contact surfaces for the lateral walls of the grooves.
Abstract: The chuck clamps a workpiece on a clamping axis eccentric to the rotation axis of the chuck. The spacing between the rotation axis and the clamping axis parallel to it can be varied along a radial axis spacing line going through the rotation axis. One jaw has a clamping surface which intersects the axis spacing plane going through the rotation axis on the axis spacing line perpendicular to the axis spacing line and is adjustable along the axis spacing line. The other jaws opposite this one jaw are adjustably mounted in guides inclined symmetrically about the axis spacing plane and are jointly centrally drivable. The first jaw and both other jaws are adjustable independently of each other. Each of the other jaws has a planar clamping surface perpendicular to its guide direction. The first jaw which does not participate in the clamping process exists to change the axis spacing.
Abstract: A chuck actuator has a cylinder extending along an axis and having an axially extending stem whose outer surface is formed with a pair of central radially outwardly open and axially spaced intake ports, a piston axially displaceable in the cylinder and forming therein two compartments connected via respective passages connected to the intake ports, two axially spaced bearings on the stem, and a connector supported by the bearings on the stem. This connector normally is restrained against rotation relative to the axis and has an inner surface closely juxtaposed with and forming with the stem surface an interface. Respective radially inwardly open and axially spaced inner feed grooves open at the interface level with the respective intake ports. Two independent hydraulic fittings communicating with the inner feed grooves can pass pressurized liquid to the respective compartments.
Abstract: The chuck has a mounting body with an associated chuck assembly and a pivot device. For clamping of a workpiece at least one chucking jaw can adjustably be swung away from its chuck assembly, and the clamped workpiece, together with the chucking jaws can be turned about a pivot axis which extends perpendicularly with respect to the axis of rotation of the operational spindle of the lathe and with respect to the axes of operation of the workpiece, into pivot positions determined by the directions of the axes of operation. For workpieces with a pair of axes of operation, which are disposed at a distance with respect to one another, the mounting body is comprised of a base member and a turning member. The turning member is journaled for rotation at the base member so as to be able to revolve about a turning axis which extends parallel to the axis of rotation of the operational spindle and which intersects the pivot axis at predetermined distance.
Abstract: A drill chuck can be operated with or without an axial displacement mode with respect to the drill spindle. For operation without the axial displacement mode, lock formations can be moved by way of a coupling ring to engage with a seat portion of a contact sleeve which is fixed to the drill spindle. The lock formations are part of resilient lock strips which are cut from the wall of a lock sleeve secured at the chuck body. The lock formations can be contacted by control projections of the coupling ring. The coupling ring can be moved in axial direction towards the drill spindle so that the contact sleeve is secured due to engagement of the lock formations at the seat portion. At the same time, the chuck body contacts at a spring ring secured to the contact sleeve, and the relative axial movements between the chuck body and the contact sleeve or the drill spindle cannot take place.
Abstract: The percussion drill apparatus is comprised of a drill spindle which powers the chuck, and the connection for rotation of the drill chuck to the drill spindle is by way of at least one coupling element which is secured in retainers respectively provided in the drill spindle and the chuck body, but allowing the operating mode with axial shifting or displacement, which mode can be terminated, or selected, by a locking mechanism having a coupling ring. The locking mechanism includes a lock element which is guided in the chuck body and which can project into a longitudinal groove extending axially in the drill spindle. The lock element can be actuated by a control sleeve which surrounds the chuck body and which can be rotated with respect thereto, to be moved, for precluding the axial displacement, into a retainer depression or pocket at the respective upper terminus of the longitudinal groove.
Abstract: A drill chuck can be driven by and rotated with a drill spindle. The drill chuck has an axial passage through which the impact effort of a central anvil shaft can be transferred to the drill. The drill can be held in chuck jaws, the movement of which can be controlled by a control sleeve. For connecting the drill chuck at the drill spindle in such a way that they rotate together, there is provided a coupling element and this can allow an axial displacement of the drill chuck at the drill spindle. This mode can be turned off, or on, by use of a locking mechanism and with a coupling ring. The lock mechanism includes a lock element which is axially fixed with respect to the drill spindle, which can be actuated by the coupling ring. The coupling ring can be axially shifted but it can be fixed so as not to rotate. The lock element can be moved into respective recesses arranged circumferentially at the chuck body for precluding axial displacement of the chuck body.
Abstract: A hammer drill chuck according to the invention has a chuck body centered on an axis and formed with an axially forwardly open hole normally receiving a drill bit, respective jaws displaceable in the body and having front ends radially engageable with a bit in the hole, and an adjustment ring engaged around the body, fitting with the jaws such that rotation of the ring in one direction advances the jaws in the body and rotation in the opposite direction retracts the jaws for respectively clamping and unclamping the drill bit in the front portion, and formed with axially backwardly directed teeth. A locking sleeve axially displaceable on the body is formed with forwardly directed teeth engageable with the teeth of the ring for rotational coupling of the sleeve and the ring, an axially relatively short, radially inwardly open, and axially forwardly open slot, and an axially relatively long, radially inwardly open, and axially forwardly open slot adjacent the short slot and of a predetermined angular width.
Abstract: A chuck has a chuck body having an outer surface and formed with a forwardly open hole defining an axis and normally receiving a drill bit, a plurality of angularly generally equispaced guide bores extending at an acute angle to the axis and having inner front ends opening in the hole and outer rear ends opening on the outer surface, and respective chip-shedding passages opening radially inward into the guide bores and radially outward on the outer surface. Respective jaws displaceable in the guide bores have front ends engageable with a bit in the hole and radially outwardly directed teeth. An adjustment ring engaged around the body fits with the teeth of the jaws so that rotation of the ring in one direction advances the jaws in the body and rotation in the opposite direction retracts the jaws for respectively clamping and unclamping the drill bit in the hole.