Patents Represented by Attorney Gurdon R. Abell
  • Patent number: 4860302
    Abstract: A scanning beam laser pumped laser is disclosed which is capable of producing pulses of 50 or more microsecond duration with a repetition rate of 100 Hz or more and an energy content per pulse of 3 joules or more. Optics focus the output beam of the pumping laser onto the front surface of the pumped laser which may comprise a flowing dye cell. A rotating mirror synchronized with the pulse repetition rate of the pumping laser moves the spot across the dye in the pumped laser in a direction preferably orthogonal to the flow of dye therein. A spherical mirror behind the rear surface of the dye cell reflects radiant energy back toward the rotating mirror. Reflective radiance is turned therefrom to, in part, pass through the aperture of a beam-combining mirror. The small fraction of radiant energy passing through either a partially reflecting surface or a small aperature on the beam combining mirror enters a resonant cavity whose dimensions define the wavelength of the pumped laser.
    Type: Grant
    Filed: August 13, 1987
    Date of Patent: August 22, 1989
    Assignee: Avco Research Laboratory, Inc.
    Inventor: George S. Janes
  • Patent number: 4789286
    Abstract: A fitting, for fastening with interengaged inner and outer threaded members to a channel-shaped framing member, comprises a tab projecting into the channel to abut the inner threaded member to assure properly rotated assembly of that threaded member and to prevent improper rotation if the threaded members are loosened.
    Type: Grant
    Filed: May 27, 1987
    Date of Patent: December 6, 1988
    Inventor: William Laput
  • Patent number: 4784648
    Abstract: In an infusion system, a source of pressurized liquid infusate is connected to the upstream end of a small-bore flow restrictor and drives a flow of infusate therethrough; the downstream end of the flow restrictor is connected to the patient. The infusate at the upstream end is in communication with an annulus inflatable by infusate pressure of at least 200 to 500 Torr; the infusate at the downstream end is in communication with another annulus inflatable by infusate pressure of only 35 to 110 Torr, as occurs during infiltration. Inflation of an annulus provides a visible indication and can provide electrical contact for an alarm.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: November 15, 1988
    Assignee: Applied Biomedical Corporation
    Inventors: Param I. Singh, Saul Stricker
  • Patent number: 4626243
    Abstract: An infusion system utilizing a pressurized source of infusate comprises a capillary tube flow restrictor having sufficient length and suitably large ratio of length to internal diameter to provide reliably repeatable fluid resistance and minimum damage to infusate. The internal diameter of the flow restrictor may be made to decrease with increasing temperature so that the flow rate of the infusate is substantially independent of temperature. The flow restrictor may include means for indicating pressures and flow of infusate.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: December 2, 1986
    Assignee: Applied Biomedical Corporation
    Inventors: Param I. Singh, David C. de Sieyes
  • Patent number: 4626118
    Abstract: A writing instrument, having a mechanism for alternately retracting and protracting its writing point, comprises a shackle alternately closed and opened by that mechanism, for releasably fastening to an associated object.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: December 2, 1986
    Inventor: Roger T. Bellavance
  • Patent number: 4397298
    Abstract: A utensil for cooking food by steaming comprises a boiler and a food holder. In the wall of the food holder is at least one perforation through which steam may pass from the boiler to cook the food. The perforation is arranged to leave a sump, in the bottom of the food holder, in which juice from the cooking food may settle and be collected.
    Type: Grant
    Filed: January 26, 1981
    Date of Patent: August 9, 1983
    Inventor: Anne C. Abell
  • Patent number: 4313739
    Abstract: The parent gas to be purified is passed end-to-end through a porous electrically conductive cylinder or its equivalent having a small wire electrode disposed along its longitudinal axis. A voltage is applied between the cylinder and wire sufficient to produce a corona discharge and ionize gas in the vicinity of the wire. Substantially only contaminants having an ionization potential less than that of the parent gas are or remain ionized and due to the electric field producing the corona discharge, are simultaneously caused to move toward the cylinder. Similarly, only electronegative gases become negatively charged in a negative corona and are likewise removed. A slightly lower pressure is maintained outside the cylinder effective to capture and remove the contaminant that has migrated to or adjacent the inner surface of the cylinder along with a small amount of the parent gas. Purified gas exits from the outlet of the cylinder.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: February 2, 1982
    Assignee: Avco Everett Research Laboratory, Inc.
    Inventor: Diarmaid H. Douglas-Hamilton