Patents by Inventor John Chapman

John Chapman 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: 6131833
    Abstract: A drive tower for a self-propelled irrigation system is described which is of the track type. The drive tower includes an elongated frame having opposite ends. A drive pulley is mounted at one end of the frame while a tail pulley is mounted at the other end of the frame. The drive pulley comprises a pair of spaced-apart, disc-shaped plates having spaced-apart rods secured thereto and extending therebetween at the periphery thereof for engagement with the interior surface of the belt. The interior surface of the traction belt is provided with a plurality of longitudinally spaced-apart lugs which are received between the rods on the drive wheel. The tail pulley and the idler pulleys have peripheries which receive the lugs on the inner surface of the belt. The exterior surface of the belt is also provided with a plurality of transversely extending traction lugs. The belt is driven by means of a double reduction gear drive.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: October 17, 2000
    Assignee: Valmont Industries, Inc.
    Inventor: John A. Chapman
  • Patent number: 6095439
    Abstract: A self-propelled irrigation machine including an elongated main boom pivoted at one end to a center pivot and supported on a plurality of self-propelled, non-steerable drive towers. An extension boom is pivotally secured to the other end of the main boom for irrigating corner areas of the field. A steerable drive tower supports the extension boom and includes a pair of steerable drive wheels. The guidance and control for the extension boom utilizes GPS receivers as position sensors. The system is comprised of two GPS units, two microprocessor based smart boxes, a communications link running from the pivot to the steerable drive unit, and an angle sensor to monitor the angle of the corner arm steerable wheels.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: August 1, 2000
    Assignee: Valmont Industries, Inc.
    Inventors: Vince G. Segal, John A. Chapman
  • Patent number: 6028842
    Abstract: Multi-media networks will require that a data flow be given certain quality-of-service (QOS) for a network connection but pre-negotiation of this sort is foreign to the current data networking model. The real time traffic flow in the data network requires distinct limits on the tolerance to delay, and the variations in that delay. Interactive voice and video demand that the total delay does not exceed the threshold beyond which human interaction is unacceptably impaired. The present invention allows the network to discover the nature of the service for each traffic flow, classifies it dynamically, and exercises traffic conditioning by means of such techniques as admission control and scheduling when delivering the traffic downstream to support the service appropriately.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: February 22, 2000
    Assignee: Nortel Networks Corporation
    Inventors: Alan Stanley John Chapman, Hsiang-Tsung Kung
  • Patent number: 6023456
    Abstract: Multi-media networks will require that a data flow be given certain quality-of-service (QOS) for a network connection but pre-negotiation of this sort is foreign to the current data networking model. The real time traffic flow in the data network requires distinct limits on the tolerance to delay, and the variations in that delay. Interactive voice and video demand that the total delay does not exceed the threshold beyond which human interaction is unacceptably impaired. The present invention allows the network to discover the nature of the service for each traffic flow, classifies it dynamically, and exercises traffic conditioning by means of such techniques as admission control and scheduling when delivering the traffic downstream to support the service appropriately.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: February 8, 2000
    Assignee: Nortel Networks Corporation
    Inventors: Alan Stanley John Chapman, Hsiang-Tsung Kung
  • Patent number: 5991956
    Abstract: A grip for ergonomic comfort attaches to the handle of a paint brush and has a pistol style grip, the top of which has a pair of v-shaped cradles separated by about 10 cms. These cradles extend from a rear arm and a short front arm. Between the arms, a strap arrangement captures a paintbrush by applying downward force to the brush handle mounted onto the cradles. The strap is secured to a top region of pistol grip, and it is adjustable either by a velcro fastening method or a buckle cleat.
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: November 30, 1999
    Inventor: John Chapman
  • Patent number: 5978376
    Abstract: A plurality of end devices are coupled via a shared port to an asynchronous network in which traffic is carried in cells. A cell multiplexer is disposed between the devices and the port and is adapted to multiplex cells from the devices to the port in the order in which they are received by the multiplexer. The multiplexer broadcasts cells received from the network to all of the devices. Each said device is allocated a respective VCI so that it can identify its own cells from the broadcast cells.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: November 2, 1999
    Assignee: Nortel Networks Corporation
    Inventors: Dhananjay Damodar Godse, William Anthony Gage, Michael A. Gazier, Alan Stanley John Chapman
  • Patent number: 5935092
    Abstract: Systems and methods treat plasma carrying contaminants and leukocytes that are capable of entraining contaminants. The systems and methods separate leukocytes from the plasma by filtration, thereby removing contaminants entrained within leukocytes. The systems and methods also add to the plasma a photoactive material and emit radiation at a selected wavelength into the plasma to activate the photoactive material and thereby eradicate the contaminant that is free of entrainment by leukocytes.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: August 10, 1999
    Assignee: Baxter International Inc.
    Inventors: Chong-Son Sun, John Chapman, Daniel F. Bischof, Robert E. Herman
  • Patent number: 5923247
    Abstract: Faults occurring in a telecommunications system are monitored identifying their time of onset and reporting them to an operator through an interface if they have not cleared within a predetermined interval. Transient faults, which do clear within that interval, are not reported directly, but only if such faults occur more frequently than a predetermined rate. This is determined by establishing a scan interval, and an analysis period equal to a plurality of scan intervals, monitoring the system continuously for the occurrences of faults, and storing their times of occurrence in a store. At the end of each scan interval, the number of occurrences of the fault during the analysis period which ends at the end of the scan interval are counted by a counter. If the number of occurrences of the fault in the analysis period is equal to or greater than a threshold value selected by user input an alarm indicator is activated.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: July 13, 1999
    Assignee: British Telecommunications public limited company
    Inventors: Antoinette Dowden, Michael John Edwards, Steven John Chapman, Michael O'Malley
  • Patent number: 5811061
    Abstract: A method and apparatus for creating a leukocyte rich sample from a mixed population of blood cells. The method comprises the steps of: separating an amount of blood into layers that include a buffy coat layer having a mixed population of blood cells including plasma and red blood cells; providing a chamber having an opening for receiving a fluid; causing the buffy coat layer to enter the chamber; centrifuging the chamber to separate the buffy coat layer into at least a plasma containing layer, a leukocyte containing layer, and a red blood cell containing layer; and separating the leukocyte containing layer from the other layers in the chamber.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: September 22, 1998
    Assignee: Baxter International Inc.
    Inventors: Jeffrey Martinson, William Bratten, Li Ming Wang, John Chapman
  • Patent number: 5785869
    Abstract: A method and apparatus for creating a leukocyte rich sample from a mixed population of blood cells. The method comprises the steps of: separating an amount of blood into layers that include a buffy coat layer having a mixed population of blood cells including plasma and red blood cells; providing a chamber having an opening for receiving a fluid; causing the buffy coat layer to enter the chamber; centrifuging the chamber to separate the buffy coat layer into at least a plasma containing layer, a leukocyte containing layer, and a red blood cell containing layer; and separating the leukocyte containing layer from the other layers in the chamber.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: July 28, 1998
    Assignee: Baxter International Inc.
    Inventors: Jeffrey Martinson, William Bratten, Li Ming Wang, John Chapman
  • Patent number: 5762732
    Abstract: The valve of a spare tire (1) has a 1 meter flexible extension to allow easier inflation. The extension comprises a flexible tube (4) having an air-supply adaptor (6) at one end and a tire valve connector (5) at the other end. A cord is inserted within the tube which maintains an open passage for air when the tube is kinked at a bend or is squeezed from load. A finger plate allows comfortable support of the air-supply adaptor when it is pressed against an air-supply nozzle.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: June 9, 1998
    Inventor: John Chapman
  • Patent number: 5686238
    Abstract: A method and apparatus for creating a leukocyte rich sample from a mixed population of blood cells. The method comprises the steps of: separating an amount of blood into layers that include a buffy coat layer having a mixed population of blood cells including plasma and red blood cells; providing a chamber having an opening for receiving a fluid; causing the buffy coat layer to enter the chamber; centrifuging the chamber to separate the buffy coat layer into at least a plasma containing layer, a leukocyte containing layer, and a red blood cell containing layer; and separating the leukocyte containing layer from the other layers in the chamber.
    Type: Grant
    Filed: December 9, 1993
    Date of Patent: November 11, 1997
    Assignee: Baxter International Inc.
    Inventors: Jeffrey Martinson, William Bratten, Li Ming Wang, John Chapman
  • Patent number: 5678771
    Abstract: A chemical distribution system for use with a mobile irrigation system comprising a liquid chemical supply line vertically adjustably supported on the irrigation system and which is in operative communication with a pressurized source of liquid chemical. A liquid chemical distribution line is positioned beneath the chemical supply line between each pair of the drive towers for the irrigation system and which is in fluid communication with a remotely controlled, electrically operated solenoid valve which is in fluid communication with a chemical supply line. A plurality of spaced-apart emitter valves, having a sprinkler associated therewith, are provided on each of the distribution lines with the associated solenoid valve being operated by a control for activating selective distribution lines whereby liquid chemical may be applied to preselected portions of the area over which the irrigation system moves.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: October 21, 1997
    Assignee: Valmont Industries, Inc.
    Inventor: John A. Chapman
  • Patent number: 5597722
    Abstract: The present invention provides a method for inactivating pathogens in a body fluid, such as plasma, red cells, platelets, leukocytes, and bone marrow. The present invention minimizes adverse effects caused by the photosensitive agents while retaining the disinfecting activity of such agents and processes. Pursuant to the present invention, prior to irradiating a body fluid including a photoactive drug, the extracellular fluid, which in the case of blood components includes plasma proteins is at least substantially reduced. Additionally, after the irradiation process, the resultant body fluid is prevented from contacting additional extracellular fluid, e.g., plasma proteins, for a predefined period.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: January 28, 1997
    Assignee: Baxter International Inc.
    Inventors: John Chapman, Patricia M. Logan, Herma C. Neyndorff, Janice North
  • Patent number: 5360734
    Abstract: The present invention provides a method for inactivating pathogens in a body fluid, such as plasma, red cells, platelets, leukocytes, and bone marrow. The present invention minimizes adverse effects caused by the photosensitive agents while retaining the disinfecting activity of such agents and processes. Pursuant to the present invention, prior to irradiating a body fluid including a photoactive drug, the extracellular fluid, which in the case of blood components includes plasma proteins is at least substantially reduced. Additionally, after the irradiation process, the resultant body fluid is prevented from contacting additional extracellular fluid, e.g., plasma proteins, for a predefined period.
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: November 1, 1994
    Assignees: Baxter International, Inc., Quadra Logic Technologies, Inc.
    Inventors: John Chapman, Patricia M. Logan, Herma C. Neyndorff, Janice North
  • Patent number: 5356080
    Abstract: A water inlet for a linear move irrigation system wherein the water inlet is supported upon a wheeled frame means which travels along the bottom of an irrigation ditch adjacent one side thereof. The water inlet is fluidly connected to the end most support tower by a plurality of jointed pipes arranged such that the water inlet may be raised out of the irrigation ditch at times. The jointed connection of the pipes permits the water inlet to vertically move relative to the support tower to compensate for vertical differences in the irrigation ditch and the cart path upon which the support tower travels.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: October 18, 1994
    Assignee: Valmont Industries, Inc.
    Inventor: John A. Chapman
  • Patent number: 5300738
    Abstract: A call registering and indicating device located at an elevator entryway issues a ticket to assist an inattentive or diverted passenger on a floor who overlooks the optical indication of the allocated elevator or forgets the noted indication prior to the arrival of an elevator. A printer and a ticket-issuing device are connected by a control circuit with the elevator group control. After the call entry and upon the call allocation, the printer and the ticket-issuing device are actuated and a ticket is issued the imprint of which indicates the selected destination floor and the allocated elevator.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: April 5, 1994
    Assignee: Inventio AG
    Inventors: Miroslav Kostka, John Chapman
  • Patent number: 5265810
    Abstract: A water inlet for a linear move irrigation system wherein the water inlet is supported upon a wheeled frame which travels along the bottom of an irrigation ditch adjacent one side thereof. The water inlet is fluidly connected to the end most support tower by a plurality of jointed pipes arranged such that the water inlet may be raised out of the irrigation ditch at times. The jointed connection of the pipes permits the water inlet to vertically move relative to the support tower to compensate for vertical differences in the irrigation ditch and the cart path upon which the support tower travels.
    Type: Grant
    Filed: September 25, 1991
    Date of Patent: November 30, 1993
    Assignee: Valmont Industries, Inc.
    Inventor: John A. Chapman
  • Patent number: 5165374
    Abstract: The inlet arrangement comprises two inlet ports for a fuel and air mixture each of which terminates at an orifice openable and closeable by a respective valve. Each inlet port is of a high flow/low swirl type and a mixture of fuel and air which flows through the orifice can be deflected to enable the inlet port to perform as a low flow/high swirl at smaller throttle openings. In one embodiment, flow of mixture through the inlet port can be deflected at low throttle openings by a transverse flow of gas from inlet ducts. In other embodiments, the direction of mixture flow can be varied by members movable into and out of the mixture flow.
    Type: Grant
    Filed: March 19, 1991
    Date of Patent: November 24, 1992
    Assignee: Rover Group Limited
    Inventors: John Chapman, Mark W. Garrett, Peter H. Parker, Robert A. Head
  • Patent number: 5074124
    Abstract: The apparatus for creating a reduced temperature air surround about a refrigeration type air conditioner. The reduced temperature air surround is interposed between the air conditioner and the environment, ambient temperature air surround. The apparatus for creating the reduced temperature air surround is a water cooling system having mist-spray heads for ejecting a fine particulate water mist into the air surrounding the air conditioner. A valve actuates the mist-spray heads only at those times at which the air conditioner fan is actuated to draw air from the immediate vicinity of the air conditioner and pass that air over the condenser coils of the air conditioner.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: December 24, 1991
    Inventor: John Chapman