Patents Represented by Law Firm Nydegger & Harshman
  • Patent number: 5025632
    Abstract: A method and apparatus for cryogenic removal of solid materials includes a wand connected in fluid communication with a cryogen fluid source. The wand directs the cryogen against a selected portion of solid material. The wand has a spray nozzle to direct the spray against an inner exposed surface of energetic material typically contained within a munition casing. The wand is connected to a mounting element to allow movement of the wand within the munition body. The munition is mounted on a rotatable base for rotating the munition and to expose the material to the cryogenic fluid spray. The cyrogenic fluid spray, such as liquid nitrogen, is utilized in a dry washout process to freeze and embrittle the surface layer either by precooling and fluid spray, or by spray alone. The embrittle layer is then eroded away by the spray into small particles for removal by pneumatic transport, vacuum, or other collection and removal system. A mechanism may be provided for vibrating the material to loosen the particles.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: June 25, 1991
    Assignee: General Atomics
    Inventor: Michael H. Spritzer
  • Patent number: 4994633
    Abstract: An electric cable for shielding the conductor therein from tensile stresses during bending of the conductor in a predetermined lateral direction. An elongated duct having a pair of opposed sidewalls and a floor therebetween holds the conductive element, while an elongated lid of relatively substantial thickness is mounted in the opening to the duct between the free ends of the sidewalls. The lid fills the duct from the opening between the free ends of the sidewalls to the neutral surface produced by lateral bending of the cable in the direction of the floor of the duct. Bonding material secures the lid and duct in a fixed longitudinal relationship, and a suitable flowable filler encases the conductor in the resulting tubular housing. The cable disclosed has particular application to the preservation of the integrity of superconductor materials used as the conductor in the cable. Preferably, the duct and lid are made of soft and hard copper, respectively.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: February 19, 1991
    Assignee: General Atomics
    Inventor: Frederick A. Puhn
  • Patent number: 4990492
    Abstract: A method for manufacturing a stress controlled wire comprises the step of twisting superconductor fibers together into a bundle of fibers. A plurality of bundles are then twisted together and disposed within the lumen of a tube and the lumen is flooded with solder which is allowed to harden. The tube and its contents are subsequently heated as they are wound upon a drum to melt the solder and allow realignment of the superconductor fibers within the solder. The subsequent solidification of solder after the tube is wound onto the drum provides an unstressed support for the fiber bundles.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: February 5, 1991
    Assignee: General Atomics
    Inventors: Richard L. Creedon, Yen-Hwa L. Hsu
  • Patent number: 4976629
    Abstract: A zero insertion force dual in-line LCD connector has a connector body which holds the base ends of a plurality of resilient contacts in electrical engagement with a printed circuit board and holds the end points of these contacts in two substantially parallel rows. An actuator is mountable on the connector body to support a liquid crystal display (LCD) panel and is movable thereon between a first position wherein the LCD panel is distanced from the end points of the contacts and a second position wherein electrical pads on the LCD panel are moved into electrical engagement with the end points. The contacts are resilient to permit a wiping movement of the end points against the pads on the LCD panel when the LCD panel is moved into the second position.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: December 11, 1990
    Assignee: Teledyne Kinetics
    Inventor: Oskar O. Werner
  • Patent number: 4974830
    Abstract: A CPM device is disclosed having a single drive tube supporting the calf and thigh support members. Arms extend upwardly from the calf and thigh support members, each supporting an adjustable cradle in which the calf or thigh rests. The support arms are rotatable 180 degrees so that either leg may be supported over the single drive tube. A foot support is also cantilevered from the end of the calf support drive bar. The drive tube which supports the calf and thigh drive support bars is cantilevered from a unique support mechanism which attaches an end of the drive tube to the horizontal bed frame at the end of the hospital bed. A rack and pinion mechanism is combined with a unique gas spring in order to allow the drive tube to be easily rotated up above the hospital bed with the gas spring providing a power assist to the person lifting the drive tube off the bed in order that the drive tube may be easily rotated up off the bed without undue physical exertion.
    Type: Grant
    Filed: February 9, 1989
    Date of Patent: December 4, 1990
    Assignee: Sutter Corporation
    Inventors: Carmen E. Genovese, Ronald L. Lawrence
  • Patent number: 4968301
    Abstract: A disposable IV infusion device for ambulatory patients comprises a disk-shaped cover plate and a disk-shaped impeller plate which are interconnected by a stretched membrane that joins the edge of the cover plate with the edge of the impeller plate. The effect of the membrane is to urge the plates into juxtaposition. A fluid port is formed on the cover plate for fluid communication through the port with a collapsible fluid chamber established between the plates. Fluid, when injected into the chamber between the plates, is subsequently expelled through the port for controlled infusion to a patient as the membrane pulls the plates toward each other to collapse the chamber.
    Type: Grant
    Filed: February 2, 1989
    Date of Patent: November 6, 1990
    Assignee: Imed Corporation
    Inventors: Giorgio di Palma, Victor L. Bartholomew
  • Patent number: 4966604
    Abstract: An expandable atherectomy cutting device comprises a flexible blade having one end connected to a torque tube and the other end connected to a tip. The tip and torque tube are rotatably positioned about a guide wire, and the torque tube is coupled to a drive element for rotating the flexible blade about the guide wire. A mechanism is associated with the tip and torque tube for pulling the tip toward the torque tube to cause the flexible blade to bow outwardly away from the guide wire to expand its radius of cutting action. The mechanism for causing the flexible blade to bow outwardly includes a base rotatably mounted in slidable relation in the torque tube, and a series of desmodromic filaments connecting the base to the tip for pulling the tip toward the torque tube. The flexible blade includes a bend so that it bows outwardly rather than inwardly.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: October 30, 1990
    Assignee: InterVentional Technologies Inc.
    Inventor: Robert E. Reiss
  • Patent number: 4964070
    Abstract: A method for increasing optical fidelity of conventional laser printers by intercepting a page description word processing output file to be sent to a printer, expanding the text in that file, rotating the expanded text, and causing the expanded, rotated text to be printed along the length of multiple sheets, along with registration marks, for later assembly into an enlarged version for photo-reduction.
    Type: Grant
    Filed: May 5, 1988
    Date of Patent: October 16, 1990
    Assignee: Vital LaserType, Inc.
    Inventors: Jay Markoff, John R. Deubert
  • Patent number: 4954046
    Abstract: A linear peristaltic pump includes a mechanism for maintaining linear flow of fluid through an I.V. tube. The mechanism comprises a casing carrying a rotatable camshaft having a plurality of cams spaced therealong in helical arrangement and a plurality of fingers coupled to the camshaft. A housing for establishing linear reciprocal movement of the fingers in response to rotation of the shaft establishes a moving zone of occlusion along a tube held against the fingers. Aligning means are included for establishing an axis of rotation of the camshaft which is slightly tilted with respect to the tube. This is accomplished by raising or lowering the upstream or the downstream end of the camshaft to prevent unwanted pressure from building up in the tube to reduce pulsatile flow and maintain linear flow. The aligning mechanism comprises a generally cylindrical bushing having an eccentric hole therethrough for carrying the hinged connection between the casing and the housing.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: September 4, 1990
    Assignee: IMED Corporation
    Inventors: Ronald D. Irvin, David Burkett, David E. Kaplan, Ronald J. Harvey
  • Patent number: 4950277
    Abstract: An atherectomy cutting device for removing obstructive tissue from the lumen of a body vessel comprises a guide wire positionable in the lumen of the vessel, and a rotatable cutter supported on an eccentric wire. The eccentric wire has a distal portion extension establishing a substantially right angle with the eccentric wire and having a ring to permit sliding movement of the eccentric wire and cutter along the guide wire. The extension and eccentric wire also permit manipulative movement of the rotatable cutter in an arc around the guide wire. There is included a dual lumen sheath having a first lumen for supporting the guide wire and a second lumen for supporting the eccentric wire carrying the rotatable cutter.Also included is a method for removing obstructive tissue which involves manipulating the eccentric wire about the guide wire to move the cutter in an arc about the guide wire and thus increase the portion of obstructive tissue contacted by the cutter.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: August 21, 1990
    Assignee: InterVentional Technologies, Inc.
    Inventor: Andrew F. Farr
  • Patent number: 4948497
    Abstract: An apparatus to acoustically fluidize a bed of fine particles comprises a generally box-shaped hollow chamber. An acoustic source is located at the bottom of the chamber and a convection inhibiting heater is located at the top of the chamber. An acoustic wave is directed from the source into the chamber to levitate and suspend fine particles within the chamber at determinable distances from the acoustic source according to the intensity and frequency of the acoustic wave.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: August 14, 1990
    Assignee: General Atomics
    Inventor: Tihiro Ohkawa
  • Patent number: 4942788
    Abstract: A cutter penetrates at its forward end into, and excises, obstructive tissue in a lumen in a living being by providing two spaced external segments of a conical generally hollow portion with cutting surfaces at their edges. The cutter may have a forward portion of restricted dimensions to facilitate the penetration of the cutter into the obstructive tissue. A progressively expanding portion such as a truncated cone extends rearwardly from the portion of restricted dimensions. In this way, the cutter expands the area of excision of the obstructive tissue from the lumen wall at progressive positions rearwardly from the forward end. The obstructive tissue in the lumen at the progressively expanding positions may be excised at the positions of penetration of the obstructive tissue by rotating the cutter manually or by a motor. The cutter may then be moved forwardly to penetrate the obstructive tissue through an additional distance in the lumen.
    Type: Grant
    Filed: July 26, 1989
    Date of Patent: July 24, 1990
    Assignee: InterVentional Technologies, Inc.
    Inventors: Andrew F. Farr, Herbert R. Radisch, Jr.
  • Patent number: 4943774
    Abstract: A magnetic field control apparatus for establishing a uniform field of flux for use in magnetic resonance imaging comprises a pair of opposed magnetic poles mounted on end plates of variable thickness. A pair of substantially flat parallel pole faces are attached to the facing surfaces of the magnetic poles. The end plates are supported by connecting members. In addition, there is included a plurality of segments movably mounted to the periphery of the pole face for adjusting the density of the magnetic field. The top and bottom end plates may have substantially identical concave portions on the opposite outside surfaces thereof. The magnetic poles and pole faces are preferably in the shape of thin, flat, circular plates. In one embodiment, there is included one or more inner concentric rings for further adjustably controlling the homogeneity of the uniform magnetic flux in the air gap between the opposing pole faces into which a patient can be inserted for magnetic resonance imaging.
    Type: Grant
    Filed: June 1, 1989
    Date of Patent: July 24, 1990
    Assignee: General Atomics
    Inventors: Bruce C. Breneman, J. Wesley Parker, Raymond E. Sarwinski
  • Patent number: 4942586
    Abstract: A single cavity laser device comprises a diode pumped laser medium having a relatively high gain but a relatively low power. With this medium, a control laser beam is generated. Also positioned in the cavity is a second laser medium having a relatively large gain volume which is pumped by an array of laser diodes at a relatively low gain to create a reservoir of excited state ions. Positioned between these two diode pumped laser mediums is a beam expander which focuses the control laser beam onto the second laser medium to substantially fill the gain volume of the second laser medium. Stimulation of the excited ions in the gain volume of the second laser medium by photons in the control beam efficiently generates a laser beam of relatively high power.
    Type: Grant
    Filed: April 25, 1989
    Date of Patent: July 17, 1990
    Assignee: Intelligent Surgical Lasers Inc.
    Inventor: Shui T. Lai
  • Patent number: 4936828
    Abstract: A liquid drop images sensor for determining the volume of liquid drops comprises a light source and an array of optical sensors which receive light energy from the source. The array is positioned relative to the source to establish a passageway therebetween through which drops can fall. Electronic structure connected to the array sequentially activates the array for discrete episodes during the passage of a drop through the passageway. The electronic structure also generates signals which indicate the proportion of the array affected by the shadow of the drop during each episode. Additionally, the liquid drop image sensor includes structure which accumulates the signals and uses them to calculate the volume of the liquid drop.
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: June 26, 1990
    Inventor: Kophu Chiang
  • Patent number: D308946
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: July 3, 1990
    Assignee: Fisher Scientific Company
    Inventors: Larry Wilson, Laurence Walden
  • Patent number: D309073
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: July 10, 1990
    Inventor: Lloyd A. Robinson
  • Patent number: D309589
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: July 31, 1990
    Inventors: Glenn F. Hare, Michael Boyden
  • Patent number: D312879
    Type: Grant
    Filed: March 18, 1988
    Date of Patent: December 11, 1990
    Assignee: IMED Corporation
    Inventor: Michael R. Aten
  • Patent number: D313639
    Type: Grant
    Filed: May 17, 1988
    Date of Patent: January 8, 1991
    Assignee: Anthony Domenico
    Inventor: Gary Cobb