Patents Represented by Attorney John W. Gregg
  • Patent number: 5494635
    Abstract: Processes are disclosed in which cemented carbide parts, having a wide range of initial carbon levels, and a wide range of sizes, can be carburized to a critical carbon level, and then slow cooled at various rates, to yield stratified enriched zones in the near-surface region of said parts. The enriched zones are characterized by the cobalt content decreasing, and the microhardness increasing, continuously through the enriched zones, and approaching values characteristic of the interior. The combination of stratified enriched zones in the near surface region and the 6% binder interior provide the toughness and deformation resistance required for heavy roughing applications.A wide variety of cemented carbides, having different compositions and WC grain sizes, can also be carburized and slow cooled using the same techniques to yield stratified binder enriched zones having the same hardness profiles and cobalt content profiles as described above.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: February 27, 1996
    Assignee: Valenite Inc.
    Inventor: Stephen L. Bennett
  • Patent number: 5478178
    Abstract: A high speed rotary boring tool has a plurality of cutter inserts evenly spaced around the circumference of a boring bar. Each cutter insert is individually adjustable so that its cutting tip is spaced a desired distance from the tool rotational axis. Each cutter insert is mounted so that its leading face has a zero rake angle in the axial direction, and a negative rake angle in the radial direction. The cutting tip on each insert is defined by two chamfer surfaces on the intersecting edges of the insert leading face, such that each chamfer surface acts as a chip-deflector surface. The boring tool is designed for cutting action during axial feed into the hole and also during axial feed out of the hole.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: December 26, 1995
    Assignee: Valenite Inc.
    Inventor: James A. Pawlick
  • Patent number: 5465215
    Abstract: A manual data input facility of a machine control includes graphically assisted input. An MDI main display and lead-through graphic displays are generated to facilitate selection of functions and entry of associated data. The displays make use of graphic icons and text recognizable by an operator. Input devices advantageously include a contact actuated touch screen and numeric keypad. A graphic assisted MDI mode of operation generates instruction blocks conforming to a predetermined user programming convention in response to operator selections and numeric data input. The operator initiates execution of instruction blocks so generated, one block at a time, by operation of a Cycle Start input.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: November 7, 1995
    Assignee: Cincinnati Milacron Inc.
    Inventors: S. Scott Strickland, James R. Krietemeyer, Jing Liao, Ian D. Mead, Robert L. Puckett
  • Patent number: 5460640
    Abstract: A fully dense ceramic-metal body including 40-88 v/o of an oxide hard phase of, in v/o of the body, 4-88 v/o M-aluminum binary oxides, where the binary oxide has a C-type rare earth, garnet, .beta.-MAl.sub.11 O.sub.18, or perovskite crystal structure, and M is a lanthanide or indium, and 0-79 v/o .alpha.-alumina; about 10-50 v/o of a hard refractory carbide, nitride, or boride as a reinforcing phase; and about 2-10 v/o of a dispersed metal phase combining Ni and Al mostly segregated at triple points of the microstructure. The preferred metal phase contains a substantial amount of the Ni.sub.3 Al ordered crystal structure. In the preferred body, the reinforcing phase is silicon carbide partially incorporated into the oxide grains, and bridges the grain boundaries. The body including a segregated metal phase is produced by densifying a mixture of the hard phase components and the metal component, with the metal component being present in the starting formulation as Ni powder and Al powder.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: October 24, 1995
    Assignee: Valenite Inc.
    Inventor: Sergej-Tomislav Buljan
  • Patent number: 5456557
    Abstract: An indexable cutting insert having a polygonal body including top and bottom surfaces connected by a peripheral wall having sides and corners. In a generally diamond shaped embodiment, opposite acutely angled corners and the adjacent sides form cutting edges at their junctures with the top surface, forming noses at the corners. A narrow cutting land extends inward from each cutting edge and slopes downward from the nose along both adjacent sides. A chip groove includes a pair of wedge faces, sloping downwardly from the cutting land to a flat floor and a radius blend juncture aligned with the nose and bisecting the adjacent sides. A pair of chipbreaker faces slope upward from the flat floor and backward from a ridge that connects the chipbreaker faces and is upwardly aligned with the juncture of the cutting faces. Various additional features are also disclosed.
    Type: Grant
    Filed: August 9, 1994
    Date of Patent: October 10, 1995
    Assignee: Valenite Inc.
    Inventors: Thomas Bernadic, Tony Lowe, John Patterson
  • Patent number: 5449255
    Abstract: A flat disk-like tool insert has a plurality of arcuate cutter tips for machining the side surface of a rotating work piece, and a plurality of linear cutting edges for machining a chamfer on the end of the work piece. An endless land surface is contiguous with the cutter tips and the linear cutting edges so as to deflect metal chips away from the machined surfaces. Each tool tip is aligned with two chip breaker ledges that are arranged in a step configuration, such that chips of varying thickness can be effectively and cleanly broken without interference with the machining process. A third chip breaker ledge is set back from each linear cutting edge for breaking chips generated during a chamfering operation.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: September 12, 1995
    Assignee: Valenite Inc.
    Inventors: Karl Katbi, Thomas Bernadic, John Patterson, Brendan Brockett, Tony Lowe
  • Patent number: 5444341
    Abstract: Torque ripple in brushless DC motors is reduced by compensation of signals controlling energization of motor stator windings. Motor current magnitude is compensated in response to compensation factor values correlated to the ratio of actual torque to ideal torque at constant current at various relative positions of a motor rotor and stator. A motor current command component associated with a commanded torque is compensated for cogging torque associated with motor magnetization. Measured relative position values are compensated to account for torque profile distortions associated with motor current magnitude.
    Type: Grant
    Filed: November 4, 1993
    Date of Patent: August 22, 1995
    Assignee: Cincinnati Milacron Inc.
    Inventors: R. William Kneifel, II, Stephen T. Walsh, Thomas W. Minnich, Robert M. Crovella, A. Harold Morser
  • Patent number: 5442520
    Abstract: An apparatus for interconnection of two personal computer style processor printed circuit boards comprises a bridge printed circuit board having edge connectors on opposing edges thereof and support member for supporting the processor printed circuit boards in facing parallel arrangement with each edge connector of the bridge printed circuit board engaged in a mating socket on one of the processor boards. The support member advantageously provides pivotable support of at least one of the processor boards to permit insertion and removal of an edge connector of the bridge board into and from the mating socket of a processor board. The support member further advantageously comprises an enclosure and the pivotable support advantageously comprises a support bracket having notched end panels for engagement with pivot pins fixed to opposing surfaces of the enclosure.
    Type: Grant
    Filed: July 1, 1994
    Date of Patent: August 15, 1995
    Assignee: Cincinnnati Milacron Inc.
    Inventors: James J. Kemp, John L. DeJager, Thomas L. Allgeyer, Jack E. Schenkel
  • Patent number: 5438522
    Abstract: A method for efficiently interpolating sub-span position commands for control of a machine member. The method includes storing a set of coefficients defined by a parametric function relating member position and time, calculating the distance between a target coordinate axis position command and a current coordinate axis position command, generating first and second command modifiers from the stored coefficients, the calculated distance, and a current coordinate axis position command, and summing the current coordinate axis position command and the first and second command modifiers to generate a subspan position command.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: August 1, 1995
    Assignee: Cincinnati Milacron Inc.
    Inventor: Robert M. Crovella
  • Patent number: 5427480
    Abstract: A boring tool is equipped with a radially adjustable clutter element, and a remotely-operated mechanism for adjusting the cutter element between its active and inactive positions. During movement of the tool into a hole in a work piece the adjustable cutter element is inactive; the cutting operation is performed by one or more non-adjustable cutter elements. When the tool holder reaches the limit of its penetration into the work piece the remote adjusting mechanism is operated to move the adjustable cutter element radially outwardly to an active cutting position. During return movement of the holder out of the work piece the adjustable cutter element performs a finish machining operation on the hole surface.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: June 27, 1995
    Assignee: Valenite Inc.
    Inventor: Raymond A. Stephens
  • Patent number: 5391310
    Abstract: Aqueous machining fluid compositions, especially aqueous metalworking fluid compositions, are provided that exhibit improved reduction of friction and forces in the mechanical shaping and working of metallic and solid non-metallic workpieces. These compositions comprise a) water, b) a sulfurized organic material selected from the group consisting of sulfurized unsaturated aliphatic carboxylic acids having from 6 to 22 carbon atoms and salts thereof, sulfurized unsaturated esters of aliphatic carboxylic acids having 1 to 22 carbon atoms, sulfurized polymerized unsaturated fatty acids and salts and esters thereof, and mixtures thereof, c) a sulfurized hydrocarbon and d) an aliphatic ester of a dialkyldithiocarbamic acid.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: February 21, 1995
    Assignee: Cincinnati Milacron Inc.
    Inventors: Mark K. Krueger, Jerry P. Byers, Henry Turchin
  • Patent number: 5389546
    Abstract: The total alkalinity of an aqueous metalworking fluid is monitored and controlled by a continuous titration method that continuously supplies a stream of the metalworking fluid, at a known, controllable flow rate, to a flow through chamber having therein a static mixing element. Simultaneously and separately a stream of acid titrant, of known acid concentration is injected into the flow through chamber at a known controllable flow rate. The acid titrant and metalworking fluid mix and react in the chamber and the reacted metalworking fluid exiting the chamber passed over the tip of a pH electrode. The pH of the reacted metalworking fluid is continuously monitored and the output of the pH electrode used to adjust the flow of acid titrant to the chamber until an endpoint pH valve (typically a pH of 4) is reached.
    Type: Grant
    Filed: April 20, 1994
    Date of Patent: February 14, 1995
    Assignee: Cincinnati Milacron Inc.
    Inventor: Giles J. P. Becket
  • Patent number: 5374883
    Abstract: Positioning errors of a moveable machine member are reduced by compensation for cyclic errors attributable to anomalies of a position transducer. Compensation values are produced which are unique only within the pitch of transducer measurement and are applied to correct the representation of measured position produced by the transducer. Positioning errors not attributable to the position transducer are corrected by compensation of position commands using compensation values associated with fixed calibration points. Use of both compensations is effective to eliminate residual errors in position correction which arise from use of calibration data created without correction of transducer cyclic errors.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: December 20, 1994
    Assignee: Cincinnati Milacron Inc.
    Inventor: Alfred H. Morser
  • Patent number: 5340964
    Abstract: Plural electrical loads supplied with power from a single source are monitored to detect defective loads. Each load is periodically individually energized and current delivered by the source is measured. Measured current for each load is compared with limit values to detect abnormal values. To overcome consequences of supply voltage fluctuations, supply voltage is also measured and admittance of each load is determined from measured current and measured voltage. The admittance value thus determined for each load is compared with limit values to detect abnormal values. Load monitoring of loads energized according to a control algorithm proceeds by periodic momentary suspension of energization according to the control algorithm and energization of selected individual loads.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: August 23, 1994
    Assignee: Cincinnati Milacron Inc.
    Inventors: Keith R. Galloway, Dennis G. O'Keefe
  • Patent number: 5229698
    Abstract: A method and apparatus for machine member motion control are provided which reduce position path errors in sampled data motion control systems. Position commands defining locations of a moveable machine member are periodically produced at a predetermined interval as is conventional in sampled data motion control. Intermediate position commands are produced at a predetermined sub-interval less than the predetermined interval in response to a parametric function relating member position and time, the parametric function being continuous through positions defined by the position commands. The intermediate position coordinates are computed as the sum of products of coefficients and coordinates of selected member position commands. To reduce processing time, the coefficients are computed and stored in advance of execution of motion for recall as motion progresses.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: July 20, 1993
    Assignee: Cincinnati Milacron Inc.
    Inventors: Thomas Minnich, Alfred H. Morser
  • Patent number: 5229952
    Abstract: A control for an injection molding machine is provided including: a processor module producing set point signals in response to detection of coincidence of, selectably, analogue input signals, binary status signals, and elapsed time signals; and, a signal processing module for periodically producing control signals in response to the set point signals, measured parameter signals and control algorithms relating set point values and measured parameter values. A DC output interface module is provided including a plurality of DC output interface circuits for applying binary control signals to machine devices. The DC output interface circuits include self-latching over-current protection including means for sensing a latched condition thereof to produce an over-current fault indicating signal available to the processor module. The processor module includes an expansion bus for connection of the signal processing module and the DC output interface module.
    Type: Grant
    Filed: January 18, 1991
    Date of Patent: July 20, 1993
    Assignee: Cincinnati Milacron Inc.
    Inventors: Keith R. Galloway, Michael W. Rothwell, Charles N. Messerle
  • Patent number: 5210698
    Abstract: A method and apparatus are provided for servo control of injection molding machine devices. A signal processor periodically produces analogue control signals for controlling machine mechanisms at a first loop closure interval and periodically produces digital control signals for controlling energization of machine heaters at a second loop closure interval. Values of analogue and digital control signals are determined according to control algorithms relating set point values and measured parameter values. Calculation of values of analogue control signals includes calculation of a first command value according to a first control algorithm, calculation of a second command value according to a second control algorithm and selection of the lesser of the first and second command values. Compensation for "cold" thermocouple junctions created at the connection of remote temperature sensing thermocouple leads and the signal processor interface circuits is provided.
    Type: Grant
    Filed: January 18, 1991
    Date of Patent: May 11, 1993
    Assignee: Cincinnati Milacron Inc.
    Inventor: David A. Topmiller
  • Patent number: 5187417
    Abstract: An apparatus and method for controlling brushless DC motors are provided. Velocity loop control is performed digitally to produce current commands at a high frequency loop closure interval. Commutation of field coil current is controlled in response to current commutation pattern control signals produced in response to measured relative position of the motor rotor and motor stator and a velocity average over a number of loop closure intervals. Switch control signals to control transistor switches providing current from a DC power source to the motor terminals are produced in response to the current commands, measured motor current and the commutation pattern control signals. The velocity loop control implements a selected transfer function relating velocity, the motor torque constant, and the moment of inertia of the motor and associated load. Facilities are provided for periodically adjusting velocity loop transfer function gain factors and the effective moment of inertia in response to input signals.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: February 16, 1993
    Assignee: Cincinnati Milacron Inc.
    Inventors: Thomas Minnich, Alfred H. Morser, Stanley L. Myers, Stephen T. Walsh
  • Patent number: 5185109
    Abstract: Extrusion of a tubular parison for blow molding is controlled according to a program of set point data defining parison wall thicknesses and extrusion rates. Progress of purge of plasticized material from an accumulator through a variable annular gap is measured. Parison profile set point signals defining wall section thickness at points correlated with progress of purge of the accumulator are produced in response to the measured progress. Purge velocity set point signals defining purge velocities correlated to selected profile points are produced in response to progress of purge of the accumulator. Variation of the annular gap is controlled in response to the parison profile set point signals and velocity of purge of the accumulator is controlled in response to the purge velocity set point signals.
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: February 9, 1993
    Assignee: Cincinnati Milacron Inc.
    Inventors: Thomas F. Habig, Wayne D. Beninghaus
  • Patent number: D365811
    Type: Grant
    Filed: March 2, 1995
    Date of Patent: January 2, 1996
    Assignee: Cincinnati Milacron Inc.
    Inventors: James J. Kemp, Edgar B. Montague, Mark D. Gildersleeve