Patents Represented by Law Firm Willian, Brinks, Olds, Hofer, Gilson & Lione, Ltd.
  • Patent number: 4843237
    Abstract: A measuring device for measuring the relative position of two objects includes a graduation of a graduation support connected with one object and a scanning device connected with the other object. The scanning device scans the graduation with light. To eliminate measuring errors that arise due to irregularities in the graduation plane of the graduation support, a first scanning graduation of a first scanning plate is positioned at a first scanning distance from the graduation plane of the graduation support and a second scanning graduation of a second scanning plate is positioned at a second scanning distance from the graduation plane of the graduation support. The scanning graduation plates are located in the scanning unit and intersect light beams from a light source. The graduation planes of the scanning graduation plates are positioned parallel to the graduation plane of the graduation support. A photoelement is optically associated with each of the scanning graduations.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: June 27, 1989
    Assignee: Dr. Johannes Heidenhain GmbH
    Inventor: Dieter Michel
  • Patent number: 4838394
    Abstract: An adjustable shock absorber system includes a plurality of shock absorbers, the damping characteristics of which are controlled by a hydraulic control circuit. Each of the shock absorbers includes an adjustable flow restrictor that is controlled by a hydraulic actuator responsive to pressure in the control circuit. By adjusting pressure in the control circuit the damping characteristics of each of the shock absorbers can be adjusted in parallel.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: June 13, 1989
    Inventors: Charles D. Lemme, Fredrick J. Furrer
  • Patent number: 4837566
    Abstract: An improved drive circuit for operating an electroluminescent display includes a circuit for biasing column and row drivers to maximize the energization voltage for illuminated pixels without reducing the contrast of the display. Interface circuitry is also provided for detecting the beginning of valid data for each line to be displayed, checking the selected display mode of the line and adjusting the timing of a system clock to completely and uniformly display characters in the 40-column, 80-column or graphics display mode.
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: June 6, 1989
    Assignee: The Cherry Corporation
    Inventors: Dean A. Channing, Lih W. Chiang
  • Patent number: 4836235
    Abstract: The disclosed tire valve includes an elastic valve body having a through passageway formed therein, with a constriction formed at an intermediate portion of the through passageway. A valve pin is provided with a gasket and is mounted to slide within the through passageway. A spring is positioned between the pin and the valve body to bias the pin to a sealing position. Preferably, the pin is formed of an elastic material. The valve body defines a sharp edged step adjacent to the constriction and the valve pin defines a sharp edged flange positioned to abut the step in the valve body so as to increase the bursting pressure of the valve.
    Type: Grant
    Filed: March 3, 1987
    Date of Patent: June 6, 1989
    Assignee: Bridge Products, Inc,
    Inventor: Ezio Pagani
  • Patent number: 4834955
    Abstract: An inhibitor formulation for inhibiting corrosion and deposition of calcium phosphate, calcium carbonate, and silt in a cooling water system and calcium sulphate (gypsum) scaling in a flue gas desulfurization system. The inhibitor formulation comprises polyacrylate, polymaleic anhydride, and phosphonate in a active weight ratio range between about 1 to 40:1 to 40:0.1 to 15, respectively. The inhibitor formulation is employed to inhibit corrosion and scaling in a combined cooling water/flue gas desulfurization process wherein at least a portion of cooling water blowdown is supplied to make up at least a portion of reagent makeup and/or mist eliminator wash water in the flue gas desulfurization system.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: May 30, 1989
    Assignee: Nalco Chemical Company
    Inventors: R. J. Mouche, M. L. Lin, E. W. Ekis, Jr.
  • Patent number: 4835546
    Abstract: An improved electronic data recorder for use in a vehicle includes a housing having a pair of connectors. The housing encloses a modular converter, a printer module, a continuous roll of paper, a modular paper advance mechanism, conversion electronics, and memory and computation electronics. Also included in the housing are a driver code input keypad, a clock and date display, and keys for selecting a variety of functions. The data recorder connects to a free end of a rotatable odometer-speedometer cable between a rotating part of a vehicle to which the cable is attached and the vehicle odometer-speedometer. The data recorder also connects to the vehicle battery and ignition switch. The rotational motion of the cable is communicated into the housing of the data recorder by one of the connectors and from there into the modular converter. The converter converts the rotational motion into a plurality of unique electrical signals representative of mileage.
    Type: Grant
    Filed: July 1, 1987
    Date of Patent: May 30, 1989
    Inventor: Walter L. Keller
  • Patent number: 4830119
    Abstract: A top head drive cooling system is provided for an earth drilling machine of the type having a mast, a top head drive assembly mounted for movement along the mast, a quill included in the top head drive assembly, and an electric motor for rotating the quill. This cooling system includes an air duct mounted to the mast and defining a slot extending along the mast. The slot is sealed by a pair of flexible resilient lips which bridge the slot, and a blower is situated at ground level to blow cooling air into the air duct. A conduit is provided on the top head drive assembly, and the conduit extends between the lips into the air duct and conducts air from the air duct to the electric motor. The portion of the conduit which extends into the air duct is preferably tapered at both ends in order to provide a sliding seal against the lips. A position measuring system is coupled to the conduit and is positioned within the air duct.
    Type: Grant
    Filed: August 4, 1988
    Date of Patent: May 16, 1989
    Assignee: 501 W-N Apache Corporation
    Inventors: Keith M. Haney, Clyde A. Willis
  • Patent number: 4828694
    Abstract: A fluid filter for use in a fluid system wherein fluid is forced through the filter by a suction source connected to the filter outlet is disclosed. In addition to a housing defining a volume, with an inlet and an outlet, and a filtration media envelope inside said volume, the filter further includes an envelope spacing means to support the envelope against collapse, and fluid flow spacing means between the housing and the envelope. In a preferred embodiment, the envelope spacing means comprises a grid assembly inside the envelope, connected to the housing inlet to maintain proper positioning.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: May 9, 1989
    Assignee: Filtertek, Inc.
    Inventor: Hayden Leason
  • Patent number: 4826598
    Abstract: An automatic transmission fluid filter is disclosed, comprised of a metal base member, a plastic cover member attached to the base member, enclosing a volume. Filtration material inside the volume is interposed between an inlet and outlet to the filter. A plastic overmold around the periphery of the union of the metal and plastic members hermetically seals the filter except at the inlet and outlet. In a preferred embodiment, the metal base member includes a flanged edge which is secured to a flanged edge of the cover member by the overmold. Slots through the flange of the base member allow plastic of the overmold to flow through, connecting together plastic on both sides of the flange. Also, the base member flange ends curled lip embedded in the plastic of the overmold. Edge sections of the filtration material extend to and between the union of the base and cover members over some sections of the edge of the filter.
    Type: Grant
    Filed: November 29, 1985
    Date of Patent: May 2, 1989
    Assignee: Filtertek, Inc.
    Inventor: Thomas A. Cain
  • Patent number: 4826151
    Abstract: There is disclosed an exercise device that aids in the performance of push-ups and hand walking exercises by elevating the feet about the hands while these exercises are being performed. This device has a rigid ankle support yoke that has two curved portions forming contoured depressions for holding the ankles. The rigid ankle support yoke is supported above the ground by means of a freestanding base, which may have wheels on the bottom.
    Type: Grant
    Filed: December 3, 1987
    Date of Patent: May 2, 1989
    Inventor: Yusuf Nuredin
  • Patent number: 4826727
    Abstract: Electroluminescent display panels comprising copper sulfide coated Zns:Mn phosphor powder, bonded in an organic dielectric binder, can be provided with increased useful lives by incorporating (1) silver in the copper sulfide coating on the ZnS:Mn phosphor powder, in an amount of 2 to 12%, by weight of the copper in the copper sulfide coating; and (2) elemental sulfur in the dielectric binder, in an amount of 0.1 to 3%, by weight of the phosphor particles. The additives can be used independently or together, preferably together. Methods of incorporating the additives are also disclosed.
    Type: Grant
    Filed: April 14, 1987
    Date of Patent: May 2, 1989
    Assignee: The Cherry Corporation
    Inventor: David Glaser
  • Patent number: 4826555
    Abstract: An apparatus for processing a self-supporting web includes a rotatable mandrel and a stationary block member which defines a recess adjacent the mandrel. The recess is shaped to form a converging chamber between the mandrel and the block member, which converges in the direction of motion of the self-supporting web. A belt is mounted for movement through the chamber and is positioned between the self-supporting web and the block member. The chamber is sized to compress the self-supporting web between the block member and the mandrel, thereby reducing the thickness of the self-supporting web as it passes through the chamber. This apparatus can be used for laminating, liquid removal, or caliper reduction operations on the self-supporting web.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: May 2, 1989
    Assignee: Miply Equipment, Inc.
    Inventor: Eliot R. Long
  • Patent number: 4823579
    Abstract: An apparatus for cutting spirally formed pipe is disclosed. This apparatus has two knives mounted on a boom to be positioned inside of the pipe. The inner knives have cutting edges that are adjacent the inner pipe surface and point in opposite directions. Two knives are also positioned outside of the pipe. Each outer knife is positioned opposite of one of the inner knives. The outer knives are continuously reciprocated toward and away from their respective opposed inner knife. The reciprocating outer knives are maintained in a position clear of the pipe while the spiral pipe is formed. The reciprocating outer knives are moved to a cutting position where their cutting edges move into and out of an overlapping relationship with the cutting edges of their respective inner knives to cut the pipe.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: April 25, 1989
    Assignee: Spiro America Inc.
    Inventor: Wilhelmus P. Castricum
  • Patent number: 4824680
    Abstract: A method of producing a sugar based chewing gum having good non-staling properties and improved wrappability is disclosed. The method includes the steps of mixing about 15 to about 35 parts by weight gum base with about 50 to about 80 parts by weight sugar, about 5 to about 30 parts by weight corn syrup, about 0.25 to about 2.0 parts by weight powdered sorbitol, effective amounts of flavor and optional color and other ingredients. The method requires that the sorbitol be mixed with the gum base prior to the time when more than one-half of the sugar is mixed with the gum base.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: April 25, 1989
    Assignee: Wm. Wrigley, Jr. Company
    Inventors: Kevin Bernatz, Ron W. Pillsbury
  • Patent number: 4821814
    Abstract: A top head drive assembly for a drilling machine includes a wrench assembly used to make up and break out threaded connections. This wrench assembly is mounted for axial movement on rails of the top head drive assembly, and is positioned immediately under the quill. The top head drive assembly also includes a tubular support assembly which includes slip type inserts for supporting a string of down hole tubulars. This support assembly can be pivoted out of alignment with the drilling axis or can be locked in alignment with the drilling axis. A plurality of centering elements are mounted under the support assembly and are movable to center the upper end of a tubular for insertion into the tubular support assembly. Preferably, both the top head drive assembly load beam and the support beam of the support assembly are formed of box sections having converging side plates and internal diagonal brace plates which transmit downward forces on the beam into forces tending to cause the side plates to diverge.
    Type: Grant
    Filed: April 2, 1987
    Date of Patent: April 18, 1989
    Assignee: 501 W-N Apache Corporation
    Inventors: Clyde A. Willis, Keith M. Haney
  • Patent number: 4821816
    Abstract: A drilling machine includes a drilling substructure skid which defines two spaced parallel skid runners and a platform. The platform supports a draw works mounted on a draw works skid, and a pipe boom is mounted on a pipe boom skid sized to fit between the skid runners of the drilling substructure skid. The drilling substructure skid supports four legs which in turn support a drilling platform on which is mounted a lower mast section. The legs are pivotably mounted both at the platform and at the driling substructure skid and a pair of platform cylinders are provided to raise and lower the drilling platform. A pair of rigid, fixed length struts extend diagonally between the platform and the substructure skid away from the platform such that the struts do not extend under the platform and obstruct access to the region under the platform. Preferably, the pipe boom skid mounts a pipe boom as well as a boom linkage, a motor, and a hydraulic pump adapted to power the pipe boom linkage.
    Type: Grant
    Filed: May 10, 1988
    Date of Patent: April 18, 1989
    Assignee: W-N Apache Corporation
    Inventor: Clyde A. Willis
  • Patent number: 4823040
    Abstract: A stator of the planar magnetized rotor motor according to the invention comprises groups of polar parts and at least two control coils. On each side of the rotor, each group of polar parts surrounded by a coil is arranged adjacent to the groups which are not surrounded by a coil. This arrangement makes it possible to increase the number of active poles of the stator, thereby increasing the motor torque, in a small size, economical, simple construction motor.
    Type: Grant
    Filed: August 11, 1987
    Date of Patent: April 18, 1989
    Assignee: Portescap
    Inventor: Claude Oudet
  • Patent number: 4821730
    Abstract: A device for spatial location and destruction of concretions in bodily cavities by application of pulsed ultrasonic shock waves generated by a shock wave transducer focussed on the concretion in question, the shock waves being transmitted to the patient by a coupling fluid. This transducer may also be operated under reduced power if appropriate during the locating operation, as an A-scanner, according to the pulse echo mode. A B-section image of the bodily tissue traversed by the ultrasonic field is generated on a monitor by means of at least one B-scanner, so that the concretion present in the section image may be placed in coincidence with a target mark present on the monitor and indicating the position of the transducer focus by a relative displacement between the patient and the device, and the shock wave transducer may thereafter be placed in operation under corresponding high power for destruction of the concretion.
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: April 18, 1989
    Assignee: Richard Wolf GmbH
    Inventors: Helmut Wurster, Werner Krauss
  • Patent number: 4819621
    Abstract: A method and apparatus are described for the detection of possible tissue injuries caused by cavitation during the medical application to a patient's body of high sonic energy which is generated extraneously by means of a sonic transducer for destruction of an element--for example a concretion--which is present in a target area. To detect the possible occurrence of cavitation the target area is acted upon by an acoustic test signal and a reception signal is generated from at least an initial reflection of the test signal. This signal is then examined by comparison with the test signal to detect the presence of an impedance jump leading to an attenuated reflection, so that a control signal may be generated upon detection of an impedance jump of this nature. Audible or visible warning signals may be engendered among others, and the sonic transducer may be deactivated if need be, by means of this control signal.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: April 11, 1989
    Assignee: Richard Wolf GmbH
    Inventors: Friedrich Ueberle, Rainer Riedlinger
  • Patent number: 4821160
    Abstract: A louver construction comprising a grid formed of cubes molded unitarily with a flange extending around the periphery of the grid. The cubes include a border row making up the periphery of the grid. The cubes in the border row have different dimensions than those inside them in the grid. The flange may vary in width but the outside dimensions of the louver remain the same. As a result, the same size louver grids will fit different size light box openings.
    Type: Grant
    Filed: April 14, 1987
    Date of Patent: April 11, 1989
    Assignee: American Louver Company
    Inventor: Walter Glass