Patents by Inventor A. S. Ghuman

A. S. Ghuman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10516499
    Abstract: This disclosure describes devices and methods related to multiplexing optical data signals. A method may be disclosed for multiplexing one or more optical data signals. The method may comprise receiving, by a dense wave division multiplexer (DWDM), one or more optical data signals. The method may comprise combining, by the DWDM, the one or more optical data signals. The method may comprise outputting, by the DWDM, the combined one or more optical data signals to one or more wave division multiplexer (WDM). The method may comprise combining, by the one or more WDM, the combined one or more optical data signals and one or more second optical data signals, and outputting an egress optical data signal comprising the combined one or more optical data signals and one or more second optical data signals.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: December 24, 2019
    Assignee: Cox Communications, Inc.
    Inventors: Harjinder S. Ghuman, Christopher Palmquist, David Job, Robert Kuse
  • Patent number: 10516922
    Abstract: This disclosure describes devices and methods related to multiplexing optical data signals. A method may be disclosed for multiplexing one or more optical data signals. The method may comprise receiving, by a dense wave division multiplexer (DWDM), one or more optical data signals. The method may comprise combining, by the DWDM, the one or more optical data signals. The method may comprise outputting, by the DWDM, the combined one or more optical data signals to one or more wave division multiplexer (WDM). The method may comprise combining, by the one or more WDM, the combined one or more optical data signals and one or more second optical data signals, and outputting an egress optical data signal comprising the combined one or more optical data signals and one or more second optical data signals.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: December 24, 2019
    Assignee: Cox Communications, Inc.
    Inventors: Harjinder S. Ghuman, Jeffrey L. Finkelstein, David Job, Robert Kuse, Chris Palmquist
  • Publication number: 20190140765
    Abstract: This disclosure describes devices and methods related to multiplexing optical data signals. A method may be disclosed for multiplexing one or more optical data signals. The method may comprise receiving, by a dense wave division multiplexer (DWDM), one or more optical data signals. The method may comprise combining, by the DWDM, the one or more optical data signals. The method may comprise outputting, by the DWDM, the combined one or more optical data signals to one or more wave division multiplexer (WDM). The method may comprise combining, by the one or more WDM, the combined one or more optical data signals and one or more second optical data signals, and outputting an egress optical data signal comprising the combined one or more optical data signals and one or more second optical data signals.
    Type: Application
    Filed: December 27, 2018
    Publication date: May 9, 2019
    Inventor: Harjinder S. Ghuman
  • Patent number: 10205552
    Abstract: This disclosure describes devices and methods related to multiplexing optical data signals. A method may be disclosed for multiplexing one or more optical data signals. The method may comprise receiving, by a dense wave division multiplexer (DWDM), one or more optical data signals. The method may comprise combining, by the DWDM, the one or more optical data signals. The method may comprise outputting, by the DWDM, the combined one or more optical data signals to one or more wave division multiplexer (WDM). The method may comprise combining, by the one or more WDM, the combined one or more optical data signals and one or more second optical data signals, and outputting an egress optical data signal comprising the combined one or more optical data signals and one or more second optical data signals.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: February 12, 2019
    Assignee: Cox Communications, Inc.
    Inventor: Harjinder S. Ghuman
  • Publication number: 20190037286
    Abstract: This disclosure describes devices and methods related to multiplexing optical data signals. A method may be disclosed for multiplexing one or more optical data signals. The method may comprise receiving, by a dense wave division multiplexer (DWDM), one or more optical data signals. The method may comprise combining, by the DWDM, the one or more optical data signals. The method may comprise outputting, by the DWDM, the combined one or more optical data signals to one or more wave division multiplexer (WDM). The method may comprise combining, by the one or more WDM, the combined one or more optical data signals and one or more second optical data signals, and outputting an egress optical data signal comprising the combined one or more optical data signals and one or more second optical data signals.
    Type: Application
    Filed: August 3, 2018
    Publication date: January 31, 2019
    Inventors: HARJINDER S. GHUMAN, Jeffrey L. Finkelstein, David Job, Robert Kuse, Chris Palmquist
  • Publication number: 20180212706
    Abstract: This disclosure describes devices and methods related to multiplexing optical data signals. A method may be disclosed for multiplexing one or more optical data signals. The method may comprise receiving, by a dense wave division multiplexer (DWDM), one or more optical data signals. The method may comprise combining, by the DWDM, the one or more optical data signals. The method may comprise outputting, by the DWDM, the combined one or more optical data signals to one or more wave division multiplexer (WDM). The method may comprise combining, by the one or more WDM, the combined one or more optical data signals and one or more second optical data signals, and outputting an egress optical data signal comprising the combined one or more optical data signals and one or more second optical data signals.
    Type: Application
    Filed: January 22, 2018
    Publication date: July 26, 2018
    Inventor: Harjinder S. Ghuman
  • Patent number: 6336598
    Abstract: A hydraulically actuated dual fuel injector separately injects two fuels into a combustion chamber of an internal combustion engine. In particular, the two fuels may be controlled quantities of a first liquid fuel and a second gaseous fuel that are used to fuel a diesel engine. The injector preferably begins injecting the first fuel sequentially before beginning to inject the second fuel.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: January 8, 2002
    Assignee: Westport Research Inc.
    Inventors: Alain M. J. Touchette, Bradley D. Douville, S. Michael Baker, Lester L. Peters, Julius Perr, A. S. Ghuman, Donald J. Benson
  • Patent number: 6098595
    Abstract: A multi-cylinder internal combustion engine is provided with an intake port injection system capable of effectively delivering port injected quantities of fuel to each cylinder while minimizing the number and size of the fuel injectors. The intake port injection system of the present invention includes a siamese or shared port arrangement having a plurality of common intake inlets, each delivering air from an intake manifold to one intake port of one cylinder and an intake port of a different cylinder. Two single intake inlets are also provided for delivering intake air solely to a single respective cylinder. Importantly, in a multi-cylinder engine having a total number of cylinders equal to N, the number of intake inlets, both common and single, equals N+1. Importantly, the total number of injectors also equals N+1. Although each intake inlet is served by only one injector, two injectors operate simultaneously to deliver fuel to a single cylinder via respective intake inlets.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: August 8, 2000
    Assignee: Cummins Engine Company, Inc.
    Inventors: Lester L. Peters, A. S. Ghuman, Philip M. Dimpelfeld, Randy P. Hessel
  • Patent number: 6067946
    Abstract: A system and a method for hydraulic actuation of poppet valves. The poppet valve is opened by application of hydraulic pressure to a piston, and is closed by action of a mechanical spring. Hydraulic pressure comes from either a high pressure source of a low pressure source, the low pressure source being higher than ambient pressure. Application of hydraulic pressure is made by a pressure control device based upon signals received from an electronic controller. Hydraulic pressure is applied in a way that minimizes the power required to actuate the valve by making use of valve inertia.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: May 30, 2000
    Assignee: Cummins Engine Company, Inc.
    Inventors: Byron J. Bunker, Amarjit S. Ghuman, Rod Radovanovic, John M. Janssen
  • Patent number: 5937807
    Abstract: An exhaust valve system for an internal combustion engine including a turbocharger is provided for effectively increasing the turbocharged boost pressure at low load engine conditions thereby effectively improving engine transient response. The exhaust valve system includes an exhaust valve control device operable in a normal timing mode for permitting normal opening of one or more exhaust valves at a normal opening crank angle, and in an advanced timing mode for advancing the timing of the opening of the exhaust valve to an advanced opening crank angle prior to the normal opening crank angle while maintaining the timing of normal closing of the exhaust valves at a normal closing crank angle.
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: August 17, 1999
    Assignee: Cummins Engine Company, Inc.
    Inventors: Lester L. Peters, David A. Vittorio, P. Douglas Free, Amarjit S. Ghuman, Harold G. Weber, Canden R. Nelson
  • Patent number: 5894992
    Abstract: Fuel injection rate shaping is integrated into the pressure intensification stage of a hydraulically actuated fuel injector having a pressure intensifier. In a first embodiment, the pressure intensification plunger is formed of two parts creating a damping chamber therebetween from which fluid is forced out through orifices in a lower one of the plunger parts during an initial phase of displacement of the upper part. Thus, injection will be performed initially at a lower pressure and rate, which increases once the plunger parts make contact. In a second embodiment, a throttled flow is set via a restrictor housing that telescopingly receives the upper plunger part, so that a lower injection rate occurs while fluid is bled off through a restricted flow path between the restrictor housing and the upper plunger part, and a higher injection rate is produced once a port in the upper plunger clears the restrictor housing.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: April 20, 1999
    Assignee: Cummins Engine Company, Inc.
    Inventors: Chung Y. Liu, Amarjit S. Ghuman, Benjamin M. Yen, Lester L. Peters, Edward D. Smith
  • Patent number: 5769319
    Abstract: An injection rate shaping nozzle assembly for a fuel injector is provided which includes a closed nozzle valve element and a rate shaping control device including an injection spill circuit for spilling a portion of the fuel to be injected to produce a predetermined time varying change in the flow rate of fuel injected into a combustion chamber. The spill circuit includes a spill passage integrally formed in the nozzle valve element. The rate shaping control may include a spill valve for controlling the spill flow through the spill circuit to create a low injection flow rate followed by a high injection flow rate. The spill passage may communicate with the injector nozzle cavity between injection events or alternatively may be blocked to prevent spill flow between injection events. The rate shaping control device may include a spill accelerating device in the form of a spill chamber formed in the nozzle valve element for creating a rapid increase in the spill flow rate.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: June 23, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: B. M. Yen, Lester L. Peters, J. P. Perr, A. S. Ghuman, Dennis Ashwill
  • Patent number: 5765755
    Abstract: An injection rate shaping nozzle assembly for a fuel injector is provided which includes a closed nozzle valve element and a rate shaping control device including an injection spill circuit for spilling a portion of the fuel to be injected to produce a predetermined time varying change in the flow rate of fuel injected into a combustion chamber. The spill circuit includes a spill passage integrally formed in the nozzle valve element. The rate shaping control device may include a spill accelerating chamber in formed in the nozzle valve element for creating a rapid increase in the spill flow rate. A spill circuit purge device is provided to remove fuel from the spill circuit and accelerating chamber between each of the injection events thereby ensuring an unimpeded, effective spill fuel flow during the next spill event.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: June 16, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Lester L. Peters, Julius P. Perr, A. S. Ghuman, Benjamin M. Yen, Chad L. Buchanan, Robert Samuel, Kevin L. Vogt, John T. Carroll, III, James E. Denton, David E. Schisler
  • Patent number: 5713335
    Abstract: In accordance with preferred embodiments of the invention a timing adjustment device includes a cam follower that is engaged between an overhead cam and an injector rocker arm, and is mounted on a rotatable eccentric shaft. The geometry of the eccentric shaft and cam follower is designed so that, as timing is varied by rotation of the eccentric shaft, no change is produced in the vertical height of the rocker arm when the cam shaft is on the outer base circle and the injector is bottomed, in order to assure that the "mechanical crush" of the PT type injector is constant despite changes in timing. In a first application of the timing arrangement, it is used together with a simple injector, which does not utilize a multi-plunger arrangement to form a hydraulic link, to achieve lower parasitic losses.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: February 3, 1998
    Assignee: Cummins Engine Company, Inc.
    Inventors: Julius P. Perr, Lester L. Peters, Amarjit S. Ghuman, Benjamin M. Yen, Edward D. Smith, David L. Buchanan, Yul J. Tarr, Laszlo D. Tikk, Andrew G. Stiles
  • Patent number: 5647536
    Abstract: An injection rate shaping nozzle assembly for a fuel injector is provided which includes a closed nozzle valve element and a rate shaping control device including an injection spill circuit for spilling a portion of the fuel to be injected to produce a predetermined time varying change in the flow rate of fuel injected into a combustion chamber. The spill circuit includes a spill passage integrally formed in the nozzle valve element. The rate shaping control may include a spill valve for controlling the spill flow through the spill circuit to create a low injection flow rate followed by a high injection flow rate. The spill passage may communicate with the injector nozzle cavity between injection events or alternatively may be blocked to prevent spill flow between injection events. The rate shaping control device may include a spill accelerating device in the form of a spill chamber formed in the nozzle valve element for creating a rapid increase in the spill flow rate.
    Type: Grant
    Filed: January 23, 1995
    Date of Patent: July 15, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: B. M. Yen, Lester L. Peters, J. P. Perr, A. S. Ghuman, Dennis Ashwill
  • Patent number: 5617726
    Abstract: EGR induction supercharged or turbocharged internal combustion engine having EGR and EGR cooling in which EGR cooling is obtained through jacket water coolers and/or an air-to-air aftercooler. EGR induction is obtained via either low pressure (ambient) induction to the system intake, or via venturi or passive pump induction into the pressurized intake. Bypassing of the EGR cooler is used to reduce condensation and fouling in the EGR cooler and to provide warmer air to reduce light load and cold ambient hydrocarbon production. A passive or catalyzed particulate trap and crankshaft driven supercharger boosting system are provided to address engine response deterioration and particulate increase problems associated with EGR.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: April 8, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Todd A. Sheridan, A. S. Ghuman, Angie R. May, Rod Radovanovic, John M. Janssen, Peter V. Woon
  • Patent number: 5611204
    Abstract: A gas flow network in combination with a highly turbocharged diesel engine for the blending of either EGR gas or blow-by gas from the crankcase vent with fresh charge air is disclosed. In the diesel engine assembly which incorporates the flow network for EGR gas, a venturi conduit and control valve combination is positioned between tile intake manifold and aftercooler and is connected to a flow line carrying the EGR gas. When the turbocharged diesel engine assembly is configured with a flow path for blow-by gas, the venturi and control valve combination is positioned between the intake manifold and aftercooler and is connected to a flow line carrying blow-by gas. These systems utilize a low static pressure at the narrow throat of the venturi so as to induce the flow of EGR gas or blow-by gas into the fresh charge air, the flow being controlled by the state of the control valve.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: March 18, 1997
    Assignee: Cummins Engine Company, Inc.
    Inventors: Rod Radovanovic, A. S. Ghuman, Gregory H. Henderson, Angela R. May
  • Patent number: 4962743
    Abstract: A cam for controlling the injection rate of fuel in a fuel injection system having a four part cam profile is disclosed. The first 120.degree. is the plunger advancement segment. The next 80.degree. is the advanced dwell segment. The next 100.degree. is the plunger retraction segment and the last 60.degree. is the retracted dwell segment. The plunger advancement segment is divided into three subsegments: pre-injection stroke, injection stroke, and overtravel stroke. The pre-injection subsegment achieves minimum velocity and acceleration at the start of injection. In the injection subsegment, the cam follower acceleration is achieved as rapidly as can Hertz stress permits to increase the injection pressure and to achieve the maximum injection rate. The overtravel subsegment achieves a sharp and clean end of injection. Preferably, this cam causes injection of less than 20 mm.sup.3 of fuel per stroke during the first ten cam angle degrees of cam rotation.
    Type: Grant
    Filed: June 6, 1989
    Date of Patent: October 16, 1990
    Assignee: Cummins Engine Company, Inc.
    Inventors: Julius P. Perr, Eric Liang, Robert C. Yu, Amarjit S. Ghuman
  • Patent number: 4901531
    Abstract: A system is provided for increasing the efficiency of internal combustion engines operating at high loads and more particularly to a multi-cylinder engine in which at least one cylinder is used as the power recovery device. The waste heat generated during operation of the engine is utilized for producing an amount of energy to perform the work by means of a Rankine cycle.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: February 20, 1990
    Assignee: Cummins Engine Company, Inc.
    Inventors: Isoroku Kubo, Amarjit S. Ghuman