Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7311312 | Chuck drawing a work against the chuck-face A chuck body is made up of axially movable plungers and jaws, in which the jaw has a master jaw body obliquely arranged with respect to an axis of the chuck body, the jaw also has a front face of the master jaw body and a rear end face of a master jaw head for restr... | 12/25/2007 |
| 7198277 | Wheel chuck with counterweighted jaws A wheel chuck includes a plurality of moveable jaws mounted upon a support structure. A plurality of moveable counterweights are mounted upon the support structure with each counterweight opposite from and connected to a corresponding one of the jaws. Upon rotation ... | 04/03/2007 |
| 6655699 | Six jaw equalizing chuck An equalizing chuck assembly for heavy duty application includes a chucking assembly having a plurality of rocker arms operably connected to an actuator by a plurality of toggle links. Jaw members are disposed on one end of the rocker arms and a counterwe... | 12/02/2003 |
| 6454278 | Counter centrifugal power chuck assembly A power chuck assembly for securing a workpiece as the chuck assembly moves or rotates the workpiece is disclosed. The assembly includes a body portion, at least two gripping members and at least two counterweights wherein said counterweights operate to a... | 09/24/2002 |
| 6425584 | Sliding jaw chuck assembly A sliding jaw chuck assembly for heavy duty applications has a plurality of radially slidable jaw mounts each actuated by an L-shaped lever mounted for rocking movement about a supporting trunion. The chuck assembly includes a sealed housing subassembly w... | 07/30/2002 |
| 6343797 | Chuck with automatically adjusted jaws and compensation of centrifugal force The invention relates to a chuck with chuck jaws (2) which are guided in the chuck housing (1). Inner jaws (4) which can be coupled or uncoupled are assigned directly or indirectly to said chuck jaws via rack gears (3), whereby the inner jaws (4) are conn... | 02/05/2002 |
| 6145850 | Diaphragm chuck In a diaphragm chuck (3) with clamping jaws (3) which are in a drivable connection with a deformable diaphragm (4) by means of jaw carriers (6) and in which counterweights (8) allocated to the clamping jaws (3) are inserted in the chuck body (2), the clam... | 11/14/2000 |
| 6089578 | Chuck assembly A jaw assembly used with the rotary driving member of an air cylinder to process a workpiece, including a casing having a center through hole into which the rotary driving member of the air cylinder is inserted, a springy jaw holder covered on the casing,... | 07/18/2000 |
| 6017266 | Dynamic compensating machine tool chuck An improved machine tool chuck is described in which the chuck body has a rotational axis and master jaws mounted in grooves provided on the surface of the chuck body. Each master jaw is dynamically balanced and includes a gripping jaw and an associated u... | 01/25/2000 |
| 5842703 | Force-actuated chuck A force-actuated chuck includes a chuck body having radial jaw guides and clamping jaws guided in the radial jaw guides. At least one force-activated movable drive member is arranged in the chuck body for driving the clamping jaws. Each one of the radial ... | 12/01/1998 |
| 5711196 | Tooling apparatus and methodology for machining a blank having multiple spin centers A tooling apparatus and method for machining a blank having a first surface portion with a first spin center and a second surface portion with a second spin center offset from the first spin center. The improved tooling apparatus includes a turning fixtur... | 01/27/1998 |
| 5340130 | Polyvalent clamp chuck for machine tools Polyvalent clamp chuck for machine-tools comprising a cylindrical chuck body in the front face of which are radially guided at least two gripping jaws that can be brought together or separated by drive means by the axial withdrawal or advance of an intern... | 08/23/1994 |
| 5052700 | Compensating and/or centralizing grip chuck A chuck is disclosed which has article gripping member each having a pivot portion intermediate its ends about which the member pivots as the chuck is opened and closed. The members are each caused to pivot by a pin which passes through a slot in the memb... | 10/01/1991 |
| 4966375 | Lathe chuck for offecenter workpiece rotation 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 fro... | 10/30/1990 |
| 4824126 | Power chuck The power chuck of the invention features a series of rocker arms which are linked by toggles to the chuck's actuator. The rocker arms are mounted on pivot pins which pivot with respect to carriers within the body of the chuck. The center of gravity of th... | 04/25/1989 |
| 4817556 | Apparatus for retaining wafers A device for releaseably holding a workpiece includes a resilient collet which is pivotally attached to a base. Several fingers for holding the workpiece extend from the collet. The fingers are pivoted by actuating a member which elastically deforms the c... | 04/04/1989 |
| 4811963 | Automatic indexing chuck for angular step-by-step movement of jaws An automatic indexing chuck comprises a dividing pivot separately and in succession, operated by a dividing shaft and a locking sleeve. The dividing shaft is slideably and sealingly accommodated in a cavity of the locking sleeve which has retention planes... | 03/14/1989 |
| 4771933 | Three-jaw chuck for a lathe 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... | 09/20/1988 |
| 4700595 | Balance mechanism for movable jaw chuck of a spin station A wafer processing spin station includes a movable jaw chuck which is adjustable in position at the clamping position to accommodate offset of the center of the wafer with respect to the axis of rotation. A balancing apparatus and method are used with the... | 10/20/1987 |
| 4696209 | Lathe having an integrated chuck A lathe having a spindle which has a flange for the mounting of a chuck in whose base sliding weights are displaceably mounted in radial grooves and act on the bases of the chuck jaws through rocking reversing pins for the compensation of centrifugal forc... | 09/29/1987 |
| 4676516 | High speed chuck assembly A chuck assembly is provided for high speed operations. The chuck includes a body about which a piston is securely mounted. A cylinder and cover are slidably mounted relative to the piston and body. Master jaws are slidably disposed within the chuck body.... | 06/30/1987 |
| 4669741 | Power-operated jaw chuck for eccentrically supporting workpieces in a machine tool The power chuck is particularly intended for holding crankshafts. The chuck has a base, a head, and clamping jaws. The head is radially guided with respect to a clamping axis which extends parallel to an axis of rotation. The clamping jaws are connected t... | 06/02/1987 |
| 4667970 | Long-stroke high-force chuck Chuck provides for each jaw an action bar extending substantially longitudinally of the chuck axis and rockable in an action plane radiating from the chuck axis and intersecting the jaw, and a pair of first and second slides for each action bar, with said... | 05/26/1987 |
| 4645219 | Chuck The invention relates to a chuck in which the clamping jaws are connected with the chuck body via radially deflectable arms. Two flat parallel arms are preferably provided for each clamping jaw. These arms act like leaf springs and form a parallelogram li... | 02/24/1987 |
| 4593919 | Rotary drill chuck with belleville spring biased jaws which are centrifugally balanced A rotary rock drilling chuck has three jaws for clamping a drill stem. Each jaw is carried by the step of a piston acting in a cylinder against belleville springs between it and an end cap. A projection from the piston passes through the belleville spring... | 06/10/1986 |
| 4572524 | Power chuck A power operated chuck comprises a rotatable chuck body having a plurality of clamping jaws which are radially movably mounted on the chuck body. An axially movable piston on the chuck body is moved by a moving mechanism which includes several hooks or ho... | 02/25/1986 |
| 4521028 | Power operated chuck having centrifugal force compensation A power operated chuck for lathes comprises a chuck body which has a central bore with at least one groove radially extending from the bore in which a jaw is moved toward and away from the bore for clamping a workpiece in the vicinity of the bore. A recei... | 06/04/1985 |
| 4508357 | Power-operated chuck for turning machines A power-operated chuck, for turning machines, having at least one jaw which is radially movably guided in a chuck body and which is actuated by a pressure medium piston which is movably guided in the chuck body and the working chamber of which is connecte... | 04/02/1985 |
| 4507031 | Power chuck for turning machines A power chuck for turning machines, comprises a chuck body having an axis of rotation on which is slidably mounted a plurality of radially extending clamping jaws. Each clamping jaw is engaged with its own tangentially extending and slidable wedge bar. Ea... | 03/26/1985 |
| 4504070 | Anti-centrifugal chuck An anti-centrifugal power chuck of the type having a plurality of radially-movable jaws and respective wedge-like actuators associated therewith for the purpose of displacing the jaws into engagement with a workpiece for holding same as the chuck is rotat... | 03/12/1985 |
| 4502704 | Workholding devices A workholding device comprises a body 10, a plurality of relatively movable base jaws 12, each base jaw 12 carrying one of a plurality of top jaws 13, such that when the base jaws 12 are moved relative to one another, a workpiece 15 can be gripped by the ... | 03/05/1985 |
| 4477096 | Socket retainer An elastic ring for maintaining a pin in a hole formed in a socket and work drive shaft of a rotary tool. The ring has integral fingers which project into the ends of the hole so that the pin cannot dislodge the ring by centrifugal force when the tool is ... | 10/16/1984 |
| 4465289 | Chuck This invention relates to chucks. Increasing effective operational rotational speeds of chucks, while reducing loss of gripping power due to such speeds, is achieved by a chuck with a wedge unit (13) having a greater expansion rate than that for a master ... | 08/14/1984 |
| 4437675 | Chuck with centrifugal force compensation A centrifugal force compensated chuck (12) using a moderately sized counterweight (60) and force multiplication to achieve proper compensation. Each counterbalance assembly includes a pair of levers (32, 40) pivotable about a common axis (34). One of the ... | 03/20/1984 |
| 4431201 | Chuck with centrifugal compensation device A centrifugal force compensation device in a wedge-type balanced rotary chuck having jaws comprises, for each jaw, a balance weight and means for doubling the centrifugal force acting on the balance weight and applying the doubled force to the back face o... | 02/14/1984 |
| 4414871 | Chuck force modulator system for rotary type machine tool The disclosure relates to an improved chuck force control and compensating means for rotary machine tools, such as lathe. The control is used with power-operated chucks and provides reliable and effective compensation for the effect of centrifugal force, ... | 11/15/1983 |
| 4387905 | Machine tool chuck A multi jaw rotary chuck for lathes and the like comprising a body having front and rear portions and including a bore, a plurality of spaced jaw guides in the front portion of the body, a plurality of movable master jaw supports for the jaws of the chuck... | 06/14/1983 |
| 4314706 | Chucks of constant jaw force Chuck installation with a cylinder and piston for fluid operation of the chuck jaws, providing a plunger projecting into the cylinder and movable in opposite directions for decreasing and increasing the volume of the cylinder and thereby increasing and de... | 02/09/1982 |
| 4275892 | Force-balanced lathe chuck with safety ring A lathe chuck has a chuck body rotatable about a chuck axis and carrying a plurality of angularly spaced and radially displaceable jaws each formed with an axially backwardly open jaw recess having at least one side inclined to the axis. Respective jaw ac... | 06/30/1981 |
| 4240645 | Force-compensated split-jaw lathe chuck A lathe chuck has a chuck body rotatable about a chuck axis and formed with a plurality of angularly spaced radially extending inner guides receiving respective inner jaw parts and with a plurality of angularly spaced and radially extending outer guides r... | 12/23/1980 |
