Patents by Inventor John R. Coleman

John R. Coleman 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).

  • Publication number: 20200300994
    Abstract: A marine multibeam sonar device comprises a processing element and a transmitter. The processing element generates a plurality of transmit transducer electronic signals and inverts a polarity of a first portion of the transmit transducer electronic signals. The transmitter is in communication with the processing element and includes a plurality of transmit electronic circuits and a plurality of transmit transducers. Each transmit electronic circuit receives and processes one of the transmit transducer electronic signals, wherein a first portion of the circuits re-inverts the polarity of the first portion of the transmit transducer electronic signals. The transmit transducers receive the processed transmit transducer electronic signals from the transmit electronic circuits and generate a sonar beam.
    Type: Application
    Filed: March 27, 2017
    Publication date: September 24, 2020
    Inventors: John A. Matson, Brian T. Maguire, Aaron R. Coleman, Jeffrey W. Hanoch
  • Publication number: 20200071627
    Abstract: A process id disclosed for upgrading tars, typically those resulting from hydrocarbon refining processes, to products suitable for other uses, such as blending with other hydrocarbons to provide low-sulfur fuel oils or Emission Control Area-acceptable fuels. A low-sulfur hydrocarbon product obtained from the process is also disclosed.
    Type: Application
    Filed: December 1, 2017
    Publication date: March 5, 2020
    Inventors: Teng Xu, Kapil Kandel, Glenn A. Heeter, David T. Ferrughelli, John S. Coleman, Michael J. Clemmons, Jesse R. McManus
  • Publication number: 20190161421
    Abstract: The invention relates to hydrocarbon pyrolysis, to equipment and materials useful for hydrocarbon pyrolysis, to processes for carrying out hydrocarbon pyrolysis, and to the use of hydrocarbon pyrolysis for. e.g., natural gas upgrading. The pyrolysis can be carried out in a reverse-flow reactor.
    Type: Application
    Filed: August 15, 2017
    Publication date: May 30, 2019
    Inventors: Federico Barrai, John S. Coleman, Dhaval A. Bhandari, Frank Hershkowitz, James R. Lattner
  • Publication number: 20190153331
    Abstract: The invention relates to approach temperatures and approach temperature ranges that are beneficial in operating a pyrolysis reactor, to pyrolysis reactors exhibiting a beneficial approach temperature, to processes for carrying out hydrocarbon pyrolysis in a pyrolysis reactor having a beneficial approach temperature. The pyrolysis reactor can be, e.g., a reverse-flow pyrolysis reactor, such as a regenerative reverse-flow pyrolysis reactor.
    Type: Application
    Filed: August 15, 2017
    Publication date: May 23, 2019
    Inventors: Federico Barrai, Elizabeth G. Mahoney, James R. Lattner, Thomas W. Pavia, John S. Coleman
  • Publication number: 20030092014
    Abstract: The invention includes ABACP nucleic acid molecules and polypeptides involved in modulating seed development, stomate regulation and plant adaptation to environmental stresses such as drought, cold and a high carbon dioxide environment.
    Type: Application
    Filed: December 13, 2001
    Publication date: May 15, 2003
    Inventors: John R. Coleman, Judith Jebanathirajah, Fernando Ferreira
  • Patent number: 5125736
    Abstract: An optical range finder includes two detectors for minimizing frequency dispersion affects of the detectors on the system. The optical range finder is calibrated by locking a voltage controlled oscillator onto adjacent null modulation signal frequencies and determining a calibration time for each adjacent frequency. Once the calibration time is determined, the range finder transmits its modulated light signal to a target device and back. The signal reflected back is detected and a measurement time delay is calculated for each of the adjacent modulation signal frequencies. From these measurements, the actual distance between the target and the device can be calculated. The multiple frequency measurements allows for statistical averaging of random errors in the system.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: June 30, 1992
    Assignee: Harris Corporation
    Inventors: Roy A. Vaninetti, John R. Coleman
  • Patent number: 5101631
    Abstract: A master cylinder assembly in which the plastic reservoir has mounting tubes fitting about mounting bosses or into recesses of mounting bosses of a master cylinder body. The tube outer ends have elastic seals integrally formed thereon which engage a wall surface of the mounting bosses in sealing relation. The seals may be lip type or O-ring type seals.
    Type: Grant
    Filed: February 6, 1991
    Date of Patent: April 7, 1992
    Assignee: General Motors Corporation
    Inventor: John R. Coleman
  • Patent number: 5022713
    Abstract: A reservoir diaphragm for a vehicle brake master cylinder fluid reservoir has a passage in communication with the atmosphere defined between the reservoir cover and diaphragm. The diaphragm has a slot receiving a projection from the cover to normally form a seal. The seal prevents pasage of air between the reservoir and the passageway when the reservoir substantially equals the atmospheric pressure. The diaphragm is movable with respect to the projection to open the seal when the pressure in the reservoir is less than the atmosphere thereby allowing air from the atmosphere to enter the reservoir.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: June 11, 1991
    Assignee: General Motors Corporation
    Inventors: Cecil C. Pugh, John R. Coleman
  • Patent number: 4987739
    Abstract: A dual master cylinder for a vehicle brake system includes a housing having a housing bore with a open end and a closed end. The open end has a piston stop. Two pistons are reciprocably received in the housing bore and define therewith a first pressurizing chamber between the pistons and a second pressurizing chamber between the second piston and the housing bore closed end. Each piston has a piston cavity opening into the respective pressurizing chamber. A first locator member and a second locator member are respectively received in the pressurizing chambers and slidably mounted in the piston cavities of the respective pistons. The first locator member projects into engagement with the rear wall of the second piston and the second locator member projects into engagement with the housing to establish the pistons at respective normal rest positions enabling fluid communication through the port between the fluid reservoir and the respective chambers.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: January 29, 1991
    Assignee: General Motors Corporation
    Inventor: John R. Coleman
  • Patent number: 4987740
    Abstract: A diaphragm for a vented master cylinder reservoir which further includes means for opening the slit thereby assuring venting of the master cylinder reservoir is provided. The slit opening means are configured in such a manner that contact of the slit opening means with the master cylinder cap will cause the diaphragm to be stressed and to elastically deform, therefore assuring the opening of the venting slit.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: January 29, 1991
    Assignee: General Motors Corporation
    Inventor: John R. Coleman
  • Patent number: 4981016
    Abstract: A dipstick in the brake fluid reservoir of a brake system of the type having one or more pistons carrying a seal of elastomeric material subject to swelling upon exposure to the presence of a foreign fluid other than brake fluid. A piece of elastomeric material of the same type as the elastomeric material of the piston seal is mounted on the dip stick at a level thereon to be consistently submerged in the brake fluid whereby the presence of the seal swelling foreign fluid in the brake fluid reservoir will be detectable by examination of the piece of elastomeric material upon removal of the dip stick from the reservoir.
    Type: Grant
    Filed: November 24, 1989
    Date of Patent: January 1, 1991
    Assignee: General Motors Corporation
    Inventor: John R. Coleman
  • Patent number: 4955197
    Abstract: An apparatus is provided for connecting a master cylinder to a brake booster of the type which has a shell with a planar front surface and a plurality of threaded studs displayed about the bore and projecting from the planar front surface. The master cyliner has a necked down end portion defining a shoulder facing the booster. The master cylinder has a circumferential extending groove provided in the necked down end portion and spaced longitudinally from the shoulder. An adapter has a central aperture to receive the necked down end portion of the master cylinder and a plurality of apertures which register with the plurality of threaded studs. A lock ring or other locking device is received in the groove of the master cylinder and effective to lock the adapter to the master cylinder and in engagement with the shoulder. A plurality of threaded nuts are installed on the threaded studs to retain the adapter in engagement with the planar surface of the booster shell.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: September 11, 1990
    Assignee: General Motors Corporation
    Inventors: John R. Coleman, Malvin L. Schubert
  • Patent number: 4945728
    Abstract: A master cylinder having pistons sliding through high pressure lip seals during operation. When the pistons are at rest during release, the seals are in an open position relative to the pistons sufficient to permit the passage of fluid therepast for compensation. The open positions are attained by providing piston portions of smaller diameter than the high pressure seals. These piston portions may be at least parts of piston beveled edge surfaces, or such edge surfaces in conjunction with notches or grooves which are of smaller diameter than the high pressure lip seals. The notches or grooves may extend circumferentially completely around the pistons, or may be arcuately extending circumferentially spaced notches or grooves.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: August 7, 1990
    Assignee: General Motors Corporation
    Inventor: John R. Coleman
  • Patent number: 4694652
    Abstract: In order to accommodate all of the tolerances along the bore centerline plane of the reservoir mount for a master cylinder, the reservoir bayonets or projections extending into the boss bores of the master cylinder body are at a reduced diameter established by worst case tolerancing. This results in greater side-to-side clearance perpendicular to the bore center-line than is desired in many instances, giving a relatively loose reservoir fit. To reduce this side-to-side clearance, locally raised ribs or the like are added to the reservoir mount bayonets to better match the diameter in the machined body reservoir bosses provided by the boss reservoir mounting surfaces. The clearance is reduced by locally increasing the diameter of the reservoir bayonet mounts based on worst case tolerancing considering only one reservoir mounting member and its associated mounting boss independently of the other mounting member and its associated mounting boss.
    Type: Grant
    Filed: April 16, 1986
    Date of Patent: September 22, 1987
    Assignee: General Motors Corporation
    Inventor: John R. Coleman
  • Patent number: 4445333
    Abstract: A master cylinder assembly has a low pressure, high volume displacement quick take-up chamber and a high pressure, low volume displacement pressurizing chamber formed by a stepped bore and a stepped piston. A compensation control and blow-off valve unit has a peripheral lip seal type valve providing compensation flow on brake release but preventing flow from the quick take-up chamber during brake apply. A normally closed check valve can open to provide communication between the quick take-up pressurizing chamber and the fluid reservoir. When the pressurizing cup for the high pressure chamber closes its compensation port, the check valve is subjected to the pressure in the quick take-up pressurizing chamber. Initial fluid flow is obtained from the quick take-up chamber past the pressurizing cup into the high pressure chamber.
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: May 1, 1984
    Assignee: General Motors Corporation
    Inventor: John R. Coleman
  • Patent number: 4373333
    Abstract: A quick take-up valve in a quick take-up master cylinder assembly which reduces fluid flow noise and restriction caused by fluid flowing in one mode of operation through an incipiently or substantially closed valve spring coil stack. The check valve arrangement has a coil compression limiting device and also has the outlet orifice so positioned as not to require fluid flow through the check valve spring coils while the check valve is open.
    Type: Grant
    Filed: August 27, 1981
    Date of Patent: February 15, 1983
    Assignee: General Motors Corporation
    Inventor: John R. Coleman
  • Patent number: 4233605
    Abstract: A Doppler radar signature simulator decoy for protecting a helicopter under attack by hostile weapons which home in on a Doppler radar return signal from the helicopters rotors. The decoy returns a strong radar signal which duplicates a relatively weaker signal emitted from the helicopter rotors, leading hostile weapons to the decoy.
    Type: Grant
    Filed: February 15, 1979
    Date of Patent: November 11, 1980
    Assignee: Northrop Corporation
    Inventor: John R. Coleman
  • Patent number: 4151473
    Abstract: A phase detector which includes gated current generators for converting one of two signals which are to be phase compared into a periodic signal of generally triangular form. The other of the two signals triggers periodic sampling of the triangular signal. A "hold" capacitor stores the sampled signals between sampling intervals, and provides the phase detector output signal. Logic gating disables the current generators during the sampling intervals so that the amplitude of the triangular waveform will not change during those intervals.
    Type: Grant
    Filed: November 18, 1977
    Date of Patent: April 24, 1979
    Assignee: Harris Corporation
    Inventors: John R. Coleman, Clyde Washburn
  • Patent number: 4061346
    Abstract: The lip of a cup seal for use in a master cylinder incorporates a semi-torus of material extending axially outward from the outer peripheral end of the seal lip. The added material is positioned immediately adjacent, but slightly radially inward from, the sharp lip edge. This added material prevents the lip from hanging up on the edges of compensation ports which open into the master cylinder bore, particularly during initial installation.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: December 6, 1977
    Assignee: General Motors Corporation
    Inventors: John R. Coleman, Dwight W. McDaniel
  • Patent number: 3956372
    Abstract: Petroleum sulfonates useful to impart micellar characteristics to mixtures of hydrocarbon and aqueous medium are obtained by reacting a hydrocarbon gas oil feedstock (average molecular weight 250-700; A/AP aliphatic to aromatic proton) ratio 5-50 moles/mole, 30-100% of the feedstock molecules contain aromatic portions and the A/AP ratio of the aromatic portion being about 3-20 moles/mole) with a solution of EDC (ethylene dichloride) containing 0.1-0.3 lb. liquid SO.sub.3 /lb EDC. The SO.sub.3 concentration is about 0.1-0.3 lb. of SO.sub.3 /lb of gas oil feedstock. Reaction takes place in a back-mix tubular reactor wherein at least about 4 parts of reaction products are recycled per 1 part of reaction products withdrawn and wherein the gas oil feedstock plus recycled reaction products and the SO.sub.3 /EDC streams entering the reaction zone are in turbulent flow. Velocity ratio of the feedstock plus recycled reaction products stream to the SO.sub.3 /EDC stream is at least 4:1, respectively.
    Type: Grant
    Filed: November 2, 1973
    Date of Patent: May 11, 1976
    Assignee: Marathon Oil Company
    Inventors: John R. Coleman, Jr., Mark A. Plummer, Carle C. Zimmerman, Jr., Henry J. Pietrzak, Wayne E. Luetzelschwab, Kent W. Robinson, Donald E. Schroeder, Jr.