Patents Represented by Attorney, Agent or Law Firm Randall J. Knuth
  • Patent number: 5989125
    Abstract: A universal joint apparatus having jointed shaft suited for transmitting high torques, comprising a spider and two yokes for fitting the arms of the spider. Each spider arm is fitted, with a bearing setup having a radial bearing with an outer ring and an inner ring, an axial bearing arranged in the area of the spider arm wrist, in a yoke eye associated with the latter. The axial bearing is disposed in a connecting structure of elastic behavior.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: November 23, 1999
    Assignee: Voith Turbo GmbH and Co., KG
    Inventor: Hans Lindenthal
  • Patent number: 5990060
    Abstract: A cleaning method and a cleaning device which require an extremely short time for processing and also insure and extremely high cleaning effect. Foreign materials deposited on a substrate are removed with a cleaning liquid prepared by mixing a basic and water-soluble fluoride and an oxidizing agent in pure water.
    Type: Grant
    Filed: February 25, 1998
    Date of Patent: November 23, 1999
    Assignee: Tadahiro Ohmi
    Inventors: Tadahiro Ohmi, Shunkichi Omae, Takayuki Jizaimaru, Takahisa Nitta
  • Patent number: 5985811
    Abstract: A cleaning solution and cleaning method are provided which: (1) make treatment at room temperature possible, and do not require heating, (2) use little chemicals and water, (3) do not require specialized apparatuses, and moreover, (4) do not require the use of specialized chemicals. The cleaning solution of the present invention comprises pure water containing 20 ppb-100 ppb of oxygen and 2 ppb or more of nitrogen. Furthermore, the cleaning solution may comprise electrolytically ionized water containing OH.sup.- and containing 20 ppb-100 ppb of oxygen. In the cleaning method of the present invention, the cleaning of a material to be cleaned is conducted in a cleaning solution comprising pure water containing 20 ppb-100 ppb of oxygen and 2 ppb-15 ppm of nitrogen, while applying ultrasound having a frequency of 30 kHz or more.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: November 16, 1999
    Assignees: Tadhiro Ohmi, Pre-Tech Co., Ltd., Kabushiki Kaisha Ultraclean Technology Research Institute
    Inventors: Toda Masayuki, Tadahiro Ohmi, Yasuyuki Harada
  • Patent number: 5977572
    Abstract: The present provides two low offset voltage AlInAs/GaInAs heterostructure-confinement bipolar transistors which include AlInAs heterostructure-confinement and AlInAs/GaInAs superlattice-confinement bipolar transistors. In the present invention, an n GaInAs emitter layer is inserted at AlGaAs confinement layer/GaInAs base layer to reduce offset voltage and potential spike at an E-B junction.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: November 2, 1999
    Assignee: National Science Council
    Inventors: Wen-Chau Liu, Wen-Shiung Lour, Jung-Hui Tsai
  • Patent number: 5977516
    Abstract: A welding method in which the outer-most surfaces of ferritic stainless steel contains chromium oxide surfaces with no iron oxides. The welding method includes flowing a gas having an oxidizing activity over the welded part while applying an arc to the welded part, which is insufficient to melt the welded part. The resulting welded stainless steel is suitable for use as clean room gas supply lines.
    Type: Grant
    Filed: June 2, 1998
    Date of Patent: November 2, 1999
    Inventor: Tadahiro Ohmi
  • Patent number: 5973535
    Abstract: A simple semiconductor circuit by which analog data or multilevel data can be fetched and stored. The circuit receives a first signal and converts the first signal into a second signal composed of multilevel. The second signal is fed back to the circuit. The circuit is constituted of a first circuit which converts the first signal into a signal group composed of multiple quantized signals and second circuit which converts the signal group into the second signal. In addition, the first or/and second circuits are constituted of one or more neuron MOS transistors.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: October 26, 1999
    Assignees: Tadahiro Ohmi, Tadashi Shibata
    Inventors: Tadashi Shibata, Tadahiro Ohmi, Takeo Yamashita
  • Patent number: 5973960
    Abstract: A nonvolatile semiconductor memory which is capable of a high degree of integration and can conduct the writing of analog data at high speed and with a high degree of accuracy.The memory device comprises two or more semiconductor devices comprising a first MOS transistor having a first floating gate which is electrically insulated, a first electrode which is capacitively coupled with the first floating gate, a second electrode provided with the first floating gate via a tunnel junction, and a third electrode connected to the second electrode via a switch; the present invention is further provided with a fourth electrode connected commonly with the third electrodes of the semiconductor devices, a fifth electrode connected commonly with the source electrodes of the first MOS transistors, a sixth electrode which is capacitively coupled with the fourth electrode, and a seventh electrode which is connected with the fourth electrode via a switch.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: October 26, 1999
    Assignee: Tadahiro OHMI and Tadashi Shibata
    Inventors: Tadashi Shibata, Tadahiro Ohmi, Yuichiro Yamashita
  • Patent number: 5967526
    Abstract: A fluid control system for a rotating shaft which provides a seal to limit fluid leakage from around the shaft and which vacuums away any fluid leaking past the provided seal. The fluid control system may be installed around a rotating shaft such as a flywheel in a press. The fluid control system includes a housing which forms a clearance space with the rotating shaft in which fluid, such as oil being used to create or service the flywheel bearing, can be collected. A seal is provided between the rotating shaft and the housing to prevent fluid leakage from the clearance space. A vacuum mechanism positioned along a leakage path beyond the seal is provided with an air duct through which passes a vacuum induced air flow which vacuums away fluid leaked from the seal.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: October 19, 1999
    Assignee: The Minster Machine
    Inventors: Richard J. Oen, Edward A. Daniel
  • Patent number: 5965825
    Abstract: A pulse encoder for fitting to a meter of a liquid dispenser device for the purpose of supplying a signal representative of the flow of dispensed liquid. The encoder includes a coding wheel driven by the meter at a speed of rotation that is substantially proportional to the liquid flow rate. The wheel carries a first series of divisions of angular period P, and referred to as "primary" divisions. Two primary sensors which detect the primary divisions are angularly offset from each other by one-fourth of the angular period, i.e. P/4, modulo P, so as to provide two primary pulse signals that are likewise offset by one-fourth of a period. The coding wheel also carries a second series of divisions, referred to as "secondary" divisions, of angular period P' equal to twice the angular period P of the primary divisions. A secondary sensor is suitable for detecting the secondary divisions so as to supply a secondary pulse signal of a period that is double the period of the primary pulse signals.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: October 12, 1999
    Assignee: Solutions Services Systems France S.A.
    Inventor: Jean-Pierre Nitecki
  • Patent number: 5961158
    Abstract: A welded material composed of welded ferritic stainless steel in which the outermost surface of the welded part contains a chromium oxide surface containing no iron oxides.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: October 5, 1999
    Inventor: Tadahiro Ohmi
  • Patent number: 5959484
    Abstract: A feedback circuit is provided which is capable of realizing handshake functions, flip flop functions, and other functions using a smaller number of elements and chip surface. The threshold circuit is provided with an electrode which is electrically floating and a plurality of input electrodes which are connected with the floating electrode via capacity elements, and the circuit has a mechanism for essentially determining the potential of the floating electrode by means of the potentials applied to the input electrodes, and the output of the circuit is determined by the potential of the floating gate; the output of the threshold circuit is connected to at least one of the plurality of input electrodes, either directly, or via at least one circuit of some type.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: September 28, 1999
    Assignees: Tadashi Shibata, Tadahiro Ohmi
    Inventors: Tadahiro Ohmi, Tadashi Shibata, Hiroaki Terada, Koji Kotani
  • Patent number: 5958330
    Abstract: The invention disclosed includes a heat treatment aging oven for heating metal parts having a heating chamber with an opening, a first transport mechanism disposed within the heating chamber for moving a first metal part through the heating chamber, and a second transport mechanism disposed within the heating chamber for moving a second metal part through the heating chamber, the first transport mechanism located in a spaced relationship to the second transport mechanism. A two piece door assembly for selectively opening the oven opening is also disclosed.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: September 28, 1999
    Assignee: ALFE Systems, Inc.
    Inventor: Kurt H. Westman
  • Patent number: 5956434
    Abstract: The present invention has as an object thereof to provide a semiconductor operational circuit which is capable of instantaneously processing in parallel a large quantity of information. The semiconductor operational circuit of the present invention which executes a predetermined operation with respect to a first signal train of signals A.sub.1, A.sub.2, . . . , A.sub.N-1, A.sub.N (where N is a positive integer) of N signals numbered from 1 to N, and a second signal train of signals B.sub.1, B.sub.2, . . . , B.sub.M-1, B.sub.M (where M is a positive integer) of M signals numbered from 1 to M, comprising a plurality of first operational circuits for executing a predetermined operation with respect to A.sub.i, and B.sub.i+n (where i is a positive integer and n is a positive or negative integer and 1.ltoreq.i.ltoreq.n and 1.ltoreq.i+n.ltoreq.M) and generating an output signal C.sub.i,n, at least one second operational circuit for generating the sum S.sub.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: September 21, 1999
    Inventors: Tadashi Shibata, Tadahiro Ohmi
  • Patent number: 5954779
    Abstract: A method for influencing the drive torque in a drive train comprising at least one electric motor at least indirectly driving one driven wheel, an internal combustion engine, and an electric machine allowing mechanical coupling to said engine operating a generator and a motor. Each selected motor allows electric coupling to the generator.The system creates a device for presetting a driver's desire for movement of the vehicle, coupled at least indirectly to an actuator of the internal combustion engine. According to the invention, the electric motors are operated as generators, at least upon release of the system for presetting a driver's desire. Drawn from the driven wheels by the electric motors is a first output portion that is generated in generator mode and fed to the electric machine for driving the internal combustion engine.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: September 21, 1999
    Assignee: Voith Turbo GmbH & Co. KG
    Inventor: Bernd Dietzel
  • Patent number: 5956254
    Abstract: An octane sensitive blending dispenser for fluids, particularly for fuel dispensers. The dispenser controls component pumps according to octane data measured by octane meters. In one form of the invention octane measurements are taken within the input lines connected to the dispenser from fluid storage tanks. Control of the component pumps is accomplished by determining the difference between the desired blend octane and the observed blend octane and adjusting the pumps so as to more closely blend the desired fluid.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: September 21, 1999
    Assignee: Tokheim Corporation
    Inventor: J. Randall Collins
  • Patent number: 5954885
    Abstract: A cleaning method which reduces the quantity of use of a chemical solution and ultrapure water by simplifying the cleaning process, has an extremely high cleaning effect, and does not damage a semiconductor substrate. This cleaning method comprises a first step of removing organic matters, metals, and fine particles adhering to a substrate body by ultrapure water containing ozone, a second step of applying megasonic to a solution of a mixture of ultrapure water and hydrofluoric acid in a cleaning bath to remove the metals and the fine particles adhering to the substrate body, a third step of removing the chemical solution used in the second step, and a forth step of applying megasonic to the ultrapure water in the cleaning bath to clean the substrate body.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: September 21, 1999
    Inventor: Tadahiro Ohmi
  • Patent number: 5951787
    Abstract: A passive film forming method enabling formation of a passivated-oxide film having a layer made of chromium oxide in its outermost surface without conducting composite electric polishing. Also disclosed is a ultra-high purity fluid feed system, processing apparatus, and a fluid contracting component, each of which is free of metal contamination and is excellent in the gas discharge characteristics, non-catalytic characteristics and corrosion resistance. The surface of the ferrite-based stainless steel containing Mn by not more than 0.03 wt %, Cu by not more than 0.05 wt %, C by not more than 0.01 wt %, and Al by not more 0.01 wt % is electrolytically polished, then moisture is removed from the surface of the stainless steel by making the steel in an inert gas, then a passivated oxide film having a layer made of non-crystalline chromium oxide is formed on the outermost surface thereof by executing heat treatment in a temperature range of 300.degree. C. to 600.degree. C.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: September 14, 1999
    Assignee: Tadahiro Ohmi
    Inventors: Tadahiro Ohmi, Shinji Miyoshi
  • Patent number: 5950826
    Abstract: A curling iron travel case which is flexible and readily disposed for placement into luggage while the curling iron remains hot. The travel case is particularly disposed to store one or more curling irons and a number of hair care accessories that a user may desire to carry along with the curling iron. The travel case is constructed of a first sheet of material, at least one row of pockets formed on one side of the first sheet, and a second sheet of material secured to the other side of the first sheet. The first sheet of material and each of the pockets are formed of a noncombustible heat resistant fabric, and the second sheet of material is a quilted fabric which provides additional insulation. One of the pockets in each of the rows is sufficiently deep completely to receive the heatable member of a curling iron. Adjacent pockets are disposed to receive the electrical cord and other hair care accessories.
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: September 14, 1999
    Inventor: Barbara J. Lykowski
  • Patent number: 5944907
    Abstract: A cleaning device comprising: a metallic vessel; a nickel fluoride layer formed on the internal surface of the vessel at least at that portion where a cleaning solution is contained; a carbon layer formed on the nickel fluoride layer, and a vibrator provided on the outer surface of the vessel.A cleaning method comprising the first step of conducting cleaning with pure water containing ozone, the second step of conducting cleaning with a cleaning solution containing HF, H.sub.2 O.sub.2, and/or O.sub.3, H.sub.2 O, and a surfactant while applying vibration at a frequency of not less than 500 kHz; the third step of conducting cleaning with pure water, and the forth step of removing an oxide film.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: August 31, 1999
    Inventor: Tadahiro Ohmi
  • Patent number: 5939925
    Abstract: A semiconductor operational circuit conducts real-time analog vector operations to permit the determination of the center of gravity of an image of a moving object. The circuit employs a first processing stage utilizing CMOS source follower circuits to perform weighted linear sum operations on the analog signals. A second processing stage utilizes comparator circuitry to perform comparison operations involving data from the weighted-sum and non-weighted-sum operations. A third processing stage utilizes exclusive OR gates to provide digital data outputs based on the comparison operation results.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: August 17, 1999
    Assignee: Tadashi Shibata and Tadahiro OHMI
    Inventors: Tadashi Shibata, Tadahiro Ohmi, Ning Mei Yu, Tsutomu Nakai