Patents Represented by Attorney, Agent or Law Firm Rogers & Killeen
  • Patent number: 6079715
    Abstract: A rotary shaft seal having an elastomer seat for fitting into the bore of a hub or for the attachment onto a shaft comprises a seal washer, connected to a metal enforcement ring through a elastomer intermediate layer. The elastomer intermediate layer consists of a material having a chemical endurance comparable to that of PTFE, in particular of fluorocaoutchouc, and has a thickness of less than 0.5 mm, preferably in the range of 0.05 mm to 0.5 mm. This intermediate layer connects the seal washer with the enforcement ring according to a method according to the invention by simultaneously vulcanization with the elastomer seat on the outer side of the enforcement ring, wherein the injection pressure acting during injection and vulcanization is kept away from the intermediate layer.
    Type: Grant
    Filed: November 7, 1997
    Date of Patent: June 27, 2000
    Assignee: Dichtungstechnik G. Bruss GmbH & Co. KG
    Inventors: Rolf Johnen, Siegfried Dunse
  • Patent number: 6081009
    Abstract: A high voltage MOSFET with low on-resistance and a method of lowering the on-resistance for a specific device breakdown voltage of a high voltage MOSFET. The MOSFET includes a blocking layer of a first conductivity type having vertical sections of a second conductivity type or the blocking layer may include alternating vertical sections of a first and second conductivity type.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: June 27, 2000
    Assignee: Intersil Corporation
    Inventor: John M. S. Neilson
  • Patent number: 6075214
    Abstract: A push button for a vending machine. The push button includes a lens that is depressed by the customer. Under the lens is a transparent or semi-transparent flexible cover over a plurality of light emitting diodes (LEDs). The color and arrangement of the LEDs can be varied to provide a number of different indicating modes. The present invention does not require items in conventional push buttons, for example, a letter and symbol plate or a reflector case.
    Type: Grant
    Filed: December 17, 1997
    Date of Patent: June 13, 2000
    Assignee: KOHA Co., Ltd.
    Inventors: Yoshiaki Sato, Eiichi Nakajima
  • Patent number: 6073414
    Abstract: A light gauge metal truss system including trusses contructed of roll formed truss chord and truss web members and a two piece roll formed truss anchor for anchoring the truss to a wall. The truss chord members are roll formed to have a generally U-shaped cross-section with a base and two substantially parallel legs with reinforcement ribs and inwardly turned hems to improve structural capacity thus improving the strength-to-weight ratio of the chord member and minimizing costs. The truss web members are roll formed to have an H-shaped cross-section with the internal flange offset from the center of the legs to provide an enlarged attachment surface. The web member also includes reverse folds and hems to improve structural capacity thus improving the strength-to-weight ratio of the web members and minimizing costs.
    Type: Grant
    Filed: June 12, 1997
    Date of Patent: June 13, 2000
    Assignee: Dale Industries, Inc.
    Inventors: Ronald R. Garris, H. Norris Havens, C. F. Miranda
  • Patent number: 6074601
    Abstract: A quench hardening jig for a cylindrical work piece comprises a flat shaped base member(1), a plurality of taper plates(2) and an inversely tapered block(4), the plurality of the taper plates being disposed radiantly on the base member retractably relative to a center of the base member while each taper plate being formed such that it is substantially L shaped in its front view and an internal surface thereof is tapered, the inversely tapered block having an inversely tapered surface(4a) fitting to the tapered surface(2a) of the taper plate and being mounted on the tapered surface of the taper plate such that a progress of the inversely tapered block(4) in a vertical direction contracts/expands an external diameter formed by the respective taper plates(2).
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: June 13, 2000
    Inventor: Shigeru Nakamura
  • Patent number: 6072286
    Abstract: An auxiliary lighting control circuit and method for a lighting system having a HID lamp as the primary light source and an auxiliary light source for providing light when the HID lamp is extinguished or below full brightness but power remains available to the circuit. The circuit senses the HID lamp current and activates a relay to a conductive state using a solid state controller when the HID lamp current is below a predetermined current magnitude to effect the lighting of the auxiliary light source.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: June 6, 2000
    Assignee: Advanced Lighting Technologies, Inc.
    Inventor: Lawrence M. Sears
  • Patent number: 6067802
    Abstract: A heat pump system based on the Peltier effect, built around a transparent or translucent material element and formed by two sheets (1) in which chains of thermoelements (3, 4) are embedded, trapped or inserted, said thermoelements being connected along their respective alternate ends with the aid of parts (2) made of a material with good thermal and electric conductivity properties, which chains are liable of being supplied with external electric energy so that heat transport is based on the direction of the current flowing through said thermoelements.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: May 30, 2000
    Assignee: Universidad Pontificia Comillas
    Inventor: Antonio Arenas Alonso
  • Patent number: 6066878
    Abstract: A high voltage MOSFET with low on-resistance and a method of lowering the on-resistance for a specific device breakdown voltage of a high voltage MOSFET. The MOSFET includes a blocking layer of a first conductivity type having vertical sections of a second conductivity type or the blocking layer may include alternating vertical sections of a first and second conductivity type.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: May 23, 2000
    Assignee: Intersil Corporation
    Inventor: John M. S. Neilson
  • Patent number: 6067017
    Abstract: An emergency location system and method for determining the location of a caller sending an emergency signal without utilizing the bandwidth of the calling system. The system may be readily attached to existing telephone, radio-telephone and similar communicating devices through existing detachable battery packs. Detection of the need to send the locating signal may be based on automatic detection of a predetermined dialing sequence or through a dedicated switch (i.e., a "panic switch") or both.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: May 23, 2000
    Assignee: Harris Corporation
    Inventors: Arthur L. Stewart, Brian P. Holt
  • Patent number: 6064340
    Abstract: An electrostatic discharge locating system may include a plurality of receivers and a central unit. Each receiver may include an antenna. The receivers may receive radio wave signals emanating from an electrostatic discharge event and transmit the signals to the central unit for processing. The central unit may determine the location of an electrostatic discharge event from the relative time of signal reception or the signal amplitudes along with predetermined locations of the receivers.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: May 16, 2000
    Assignee: Intersil Corporation
    Inventors: Gregg D. Croft, Joseph C. Bernier, Rex Lowther
  • Patent number: 6060795
    Abstract: A power pack for providing power electronics at high temperature with high dI/dt, current, and voltage capability. The power pack having three layers. A top layer for providing: a matching composite Coefficient of Thermal Expansion (CTE) between power device materials and power electrodes, thermal cooling, and electrical conduction paths. The top layer may have interface circuitry for driving and controlling on-board power semiconductor devices. The top layer may also include traces and pads for the attachment of a gate, a gate return, and terminals. A middle layer may be a power semiconductor device providing control of the current flow. The bottom layer may be a rigid base plate for providing structural rigidity or may provide an electric and thermal path for the power semiconductor device. The power pack also includes a thermal shim which provides a thermal path to dissipate heat generated by the interface circuitry. The power pack may also include a snubber circuit.
    Type: Grant
    Filed: March 18, 1998
    Date of Patent: May 9, 2000
    Assignee: Intersil Corporation
    Inventors: James K. Azotea, Steve Arthur, Homer Glascock
  • Patent number: 6057612
    Abstract: A power pack including a power device and driver circuit sandwiched between a base plate and a lid. The base plate and lid having flat exterior surfaces for bonding with heat exchangers and/or an external bus to provide both two-sided cooling and two-sided electrical access. The driver circuit and power device are spaced apart to allow parallel and separate thermal conduction paths to both the base plate and lid. The power pack further including a seal enclosing the power device and driver circuit between the base plate and lid.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: May 2, 2000
    Assignee: Intersil Corporation
    Inventor: Victor A. K. Temple
  • Patent number: 6054369
    Abstract: A method of controlling minority carrier lifetime in a semiconductor device in which the density of recombination centers is controlled so that the recombination centers are concentrated in a thin buffer layer adjacent a blocking layer in one of two bonded wafers. The density is controlled by misaligning crystal axes of the two wafers or by doping the bonding surface of one of the wafers before the wafers are bonded. Both methods generate recombination centers in the thin buffer layer that forms around or adjacent the bonding interface. A semiconductor device made by this method includes a buffer layer with a significantly higher density of recombination centers than the adjacent blocking layer to thereby improve control of minority carrier lifetime.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: April 25, 2000
    Assignee: Intersil Corporation
    Inventors: John Manning Savidge Neilson, John Lawrence Benjamin, Maxime Zafrani
  • Patent number: 6055021
    Abstract: A system and method for obtaining and maintaining synchronization to a digital signal containing framing. The method searches for a synchronizing pattern and maintains a confidence counter indicative of the success in finding the synchronization pattern where expected. The confidence counter can be used to indicate when the system is locked to the framing of the digital signal and when resynchronization needs to occur.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: April 25, 2000
    Assignee: Harris Corporation
    Inventor: Ed Twitchell
  • Patent number: 6041469
    Abstract: A dust collector which comprises a long suction fan and a movable filter adaptable to the fan and whose filter permits dust itself caught thereon to function as a three-dimensional filter to thereby enable collection of micro dust.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: March 28, 2000
    Assignee: Nisshinbo Industries, Inc.
    Inventors: Tatsutake Horibe, Kazuhiko Sawaya
  • Patent number: 6041121
    Abstract: A secure, quick-release mount and method for easily accessing a telephone handset or other device which may be mounted in a difficult to access location such as within the close confines of an automobile compartment or on an elevated equipment shelf. The mount includes a pair of complementary slides for attachment to a telephone handset and a mounting bracket secured to a permanent location, and includes a latch and latching mechanism to assure that the handset remains securely stored and on hook when not in use, the latching mechanism being responsive to applied pressure to readily release the handset and to make it available when required.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: March 21, 2000
    Assignee: Harris Corporation
    Inventors: Vinh Hew Diep, Najibullah Naikal
  • Patent number: 6037628
    Abstract: Semiconductor structures such as the trench and planar MOSFETs (UMOS), trench and planar IGBTs and trench MCTs using trenches to establish a conductor. Improved control of the parasitic transistor in the trench MOSFET is also achieved and cell size and pitch is reduced relative to conventional structures.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: March 14, 2000
    Assignee: Intersil Corporation
    Inventor: Qin Huang
  • Patent number: 6034411
    Abstract: An integrated circuit inverted thin film resistor structure and method of manufacture having interconnect defining resistor contacts and leads resident within and coplanar with a supporting layer, resistive material uniformly overlaying the supporting layer and contacts, the resistive material diffused into the resistor/interconnect contact region.
    Type: Grant
    Filed: October 29, 1997
    Date of Patent: March 7, 2000
    Assignee: Intersil Corporation
    Inventors: William R. Wade, Jack Linn
  • Patent number: 6025754
    Abstract: A RF amplifier and method wherein the bias current is varied dynamically as a function of the envelope of the RF modulation to increase the efficiency and improve the linearity of the amplifier. Alternatively, the supply voltage may be dynamically varied as a function of modulation envelope.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: February 15, 2000
    Assignee: Harris Corporation
    Inventor: William J. Czora
  • Patent number: 6022125
    Abstract: The present invention is a combination metal halide and auxiliary light bulb floor or table lamp which is suitable for home or office illumination. The lamp includes a lampholder module which provides a unitary housing for the bulb sockets and the electrical components required to operate the bulbs. The module also positions each bulb relative to the others to minimize shadowing which results when a bulb casts a shadow due to the light emanating from another bulb.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: February 8, 2000
    Assignee: Advanced Lighting Technologies, Inc.
    Inventors: William E. Bartasevich, John J. Andrisin, III, John J. McEllen