Patents Represented by Law Firm Weingarten, Schurgin, Cagnebin & Hayes
  • Patent number: 6256674
    Abstract: A method and apparatus for providing buffer state accounting at a link level, otherwise known as link flow control, in addition to flow control at the virtual connection level. Link flow control enables receiver cell buffer sharing while maintaining per-connection bandwidth with lossless cell transmission. High link level update frequency is enabled without a significant sacrifice in overall link forward bandwidth. A higher and thus more efficient utilization of receiver cell buffers is achieved.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: July 3, 2001
    Assignees: Fujitsu Network Communications, Inc., Fujitsu Limited
    Inventors: Thomas A. Manning, Stephen A. Caldara, Stephen A. Hauser, Douglas H. Hunt, Raymond L. Strouble
  • Patent number: 5410969
    Abstract: The invention relates to a steering device for a vehicle bogey fitted with wheels having pneumatic tires that run on a pair of runways forming a track along which the vehicle travels. The device comprises a steering caster whose mean plane is parallel or substantially parallel to that of the wheels of the bogey and which is capable of rotating about its own axis when engaging in a guide groove installed between the above-mentioned runways of the track ahead of each branch point. The caster is carried by the frame of the bogey via laminated link blocks that confer to the caster and relative to the bogey a small amplitude degree of freedom in rotation about a vertical axis passing through the center of the caster, and a similarly small amplitude degree of freedom in translation along the axis of the caster, but prevent the caster from moving relative to the bogey in the vertical direction.
    Type: Grant
    Filed: August 6, 1993
    Date of Patent: May 2, 1995
    Assignee: Techlam
    Inventors: Rene Senes, Sylvain Thuet
  • Patent number: 5301969
    Abstract: A bicycle with jumping or leaping capabilities is disclosed wherein the bicycle selectively stores energy in compressible and tensionable members which form part of first and second bicycle frames. At a predetermined moment in time, the energy stored in the compressible and tensionable members is released causing the first and second frames to move in opposite directions thus effectuating a leap or jump.
    Type: Grant
    Filed: July 23, 1992
    Date of Patent: April 12, 1994
    Inventor: Wayne Bynoe
  • Patent number: 5239837
    Abstract: A refrigeration system particularly suitable for an automobile air conditioning system is disclosed. The system includes an ejector to raise the pressure of the working fluid to the condenser pressure and a boiler which utilizes waste heat from the automobile engine. The boiler produces a near sonic velocity saturated vapor for input to the primary nozzle of the ejector. The near sonic velocity input maximizes the stagnation temperature and pressure of the fluid entering the primary nozzle for a given low or limited temperature heat source such as automobile waste heat. The refrigeration system uses a working fluid having a property such that its entropy when in a saturated vapor state decreases as pressure decreases, which maximizes the input pressure for a given heat source and prevents the vapor from condensing in the ejector. A high efficiency primary nozzle is also provided, allowing the system to take advantage of the decreasing entropy property of the saturated vapor.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: August 31, 1993
    Assignee: Northeastern University
    Inventors: Gregory J. Kowalski, Arthur R. Foster
  • Patent number: 5124180
    Abstract: The invention relates to a method of producing a substantially haze free, fluorine doped metal oxide coating on a substrate such as glass. The method includes the steps of heating a surface of the substrate to be coated, contacting the surface with a vapor including a metal oxide precursor, an oxidizing agent, and a dopant containing a chemically reactive vinylic fluorine atom, and thermally oxidizing the vapor into a fluorine containing metal oxide film.Another feature of the invention is an apparatus for producing a uniform, substantially haze free, fluorine containing metal oxide thin film coating on a substrate such as glass. The apparatus includes a heater to heat the substrate to between approximately 450.degree. and 600.degree. C. and a conveyor to convey the heated substrated to a reaction zone adjacent an injector head. The injector head produces a vapor containing a metal oxide precursor, an oxidizing agent, and a dopant containing a chemically reactive vinylic fluorine atom.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: June 23, 1992
    Assignee: BTU Engineering Corporation
    Inventor: James W. Proscia
  • Patent number: 5079549
    Abstract: A digital resolver is provided that accepts an analog representation of an angular or linear displacement within a reticle modulation cycle of a rotatable or translatable member, and provides a highly accurate output digital representation of the displacement within the cycle, even during rapid movement of the member. An encoder cooperative with the interpolator receives an analog signal that represents the displacement, and yields a pair of quadrature-phased sine wave signals accordingly. These signals are provided to the interpolator, wherein each is multiplied by a stored digital representation of a trigonometric function of the output digital signal. The resulting products are then added so as to provide an error signal which is used to drive a digital control loop, such that a digital output signal is provided that represents displacement within a reticle cycle.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: January 7, 1992
    Assignee: Dynamics Research Corporation
    Inventor: Christopher W. Liessner