Patents by Inventor Charles D. Wood

Charles D. Wood 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: 20190145877
    Abstract: A helmet testing apparatus includes a sensor configured to be selectively positionable within an interior head cavity of a helmet to acquire compliance data regarding a liner of the helmet and a processing circuit configured to determine a rating for the helmet based on the compliance data and predetermined compliance parameters for the helmet.
    Type: Application
    Filed: December 19, 2018
    Publication date: May 16, 2019
    Applicant: Elwha LLC
    Inventors: Alistair K. Chan, Geoffrey F. Deane, William D. Duncan, Philip A. Eckhoff, Bran Ferren, William Gates, W. Daniel Hillis, Roderick A. Hyde, Muriel Y. Ishikawa, Edward K.Y. Jung, Jordin T. Kare, John Latham, Max N. Mankin, Nathan P. Myhrvold, Robert C. Petroski, Clarence T. Tegreene, David B. Tuckerman, Thomas A. Weaver, Charles Whitmer, Lowell L. Wood, JR., Victoria Y.H. Wood
  • Publication number: 20190141196
    Abstract: A hands-free intercom may include a user-tracking sensor, a directional microphone, a directional sound emitter, a display device, and/or a communication interface. The user-tracking sensor may determine a location of a user so the directional microphone can measure vocal emissions by the user and the directional sound emitter can deliver audio to the user. The hands-free intercom may provide privacy to the user. The hands-free intercom may prevent an eavesdropper from hearing the user's vocal emissions, for example, by canceling the vocal emissions at the eavesdropper's ear. The directional sound emitter may deliver out-of-phase sound to cancel the vocal emissions. The hands-free intercom may also, or instead, cancel ambient noise at the user's ear. The hands-free intercom may measure or predict a filtration of the sound to be canceled and compensate for the filtration when canceling the sound.
    Type: Application
    Filed: October 30, 2018
    Publication date: May 9, 2019
    Inventors: Jesse R. Cheatham, III, Roderick A. Hyde, Muriel Y. Ishikawa, Jordin T. Kare, Craig J. Mundie, Nathan P. Myhrvold, Robert C. Petroski, Eric D. Rudder, Desney S. Tan, Clarence T. Tegreene, Charles Whitmer, Andrew Wilson, Jeannette M. Wing, Lowell L. Wood, JR., Victoria Y.H. Wood
  • Publication number: 20180348828
    Abstract: An attachment for an electronic device includes a housing. The housing is selectively attachable to an electronic device or electronic device module by one or more coupling devices. At least one thermal energy mitigation device is carried by the housing. At least one thermal energy sensor is optionally carried by the housing. A control circuit of the attachment, or alternatively one or more processors of the electronic device or electronic device module can actuate the thermal energy mitigation device to dissipate thermal energy incident upon the housing, or generated by the electronic device, in response to signals from the thermal energy sensor.
    Type: Application
    Filed: June 5, 2017
    Publication date: December 6, 2018
    Inventors: Alberto R Cavallaro, Charles D. Wood, Morris Bowers, David Winkler
  • Patent number: 9551150
    Abstract: Embodiments of the present invention include hot-rolled threaded rebar bolts that have a substantially circular core with semi-continuous threads on opposing sides of the rebar bolts. In some embodiments of the invention the shaft is substantially void of longitudinal ribs along at least a portion of the longitudinal area between the first set of threads and the second set of threads of the shaft. The threaded rebar bolt is manufactured in a continuous hot-rolling process to create a threaded rebar shaft with semi-continuous threads and substantially no longitudinal ribs in the longitudinal areas and no additional machining is required to create the threads after the threaded shaft is created from the hot-rolling process.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: January 24, 2017
    Assignee: NUCOR CORPORATION
    Inventor: Charles D. Wood
  • Publication number: 20150376902
    Abstract: Embodiments of the present invention include hot-rolled threaded rebar bolts that have a substantially circular core with semi-continuous threads on opposing sides of the rebar bolts. In some embodiments of the invention the shaft is substantially void of longitudinal ribs along at least a portion of the longitudinal area between the first set of threads and the second set of threads of the shaft. The threaded rebar bolt is manufactured in a continuous hot-rolling process to create a threaded rebar shaft with semi-continuous threads and substantially no longitudinal ribs in the longitudinal areas and no additional machining is required to create the threads after the threaded shaft is created from the hot-rolling process.
    Type: Application
    Filed: September 11, 2015
    Publication date: December 31, 2015
    Inventor: Charles D. Wood
  • Publication number: 20150348166
    Abstract: A system and method includes a data store that stores information about a plurality of product offerings, a communication interface that receives, via a network, social signals information, a social signals processor coupled to an application programming interface that enables transmission of the social signals information, wherein the social signals processor detects a change in profile information, geo-social information, status information, or social media preference, and a product offering processor that determines a product offering from among the plurality of product offerings based on the detected change in profile information, geo-social information, status information, or social media preference.
    Type: Application
    Filed: May 27, 2015
    Publication date: December 3, 2015
    Inventors: Dwij TRIVEDI, Charles D. WOOD, Michael KIERNAN, Anant SAJNANI, Gabe B. GINDELE
  • Publication number: 20130209192
    Abstract: Embodiments of the present invention comprise hot-rolled threaded rebar bolts that are less costly to manufacture but maintain the same or similar structural benefits of more costly manufactured bolts presently in use. One embodiment of the invention is directed generally to bolts for use in mine roof support applications, or other structural support applications, that are manufactured by hot-rolling a steel bar into a threaded bolt. Hot-rolling threads onto a bar results in eliminating costly processes to prepare the rebar for threading and mechanically threading the rebar via standard thread-cutting schemes, and creates bolts efficiently in large quantities that have semi-continuous threads and minor or no longitudinal ribs. The threaded rebar bolts are rotatable in cured resin nuts, making them tensionable, and can be adapted for use with a columnar resin nut disposed in bore holes in geological structures.
    Type: Application
    Filed: June 23, 2011
    Publication date: August 15, 2013
    Applicant: Nucor Corporation
    Inventor: Charles D. Wood
  • Patent number: 5577769
    Abstract: A hybrid inflator for inflating vehicle air bags includes a first pressure vessel containing a compressed gaseous fuel, and igniter assembly and a second pressure vessel containing a compressed inflator gas. In use, the compressed fuel gas is released into the compressed inflator gas vessel using an igniter assembly for ignition of the gaseous fuel. Ignition of the gaseous fuel in the second pressure vessel causes a pressure and temperature rise which ruptures a burst disk in the second pressure vessel for gas release and inflation of an air bag.
    Type: Grant
    Filed: June 13, 1995
    Date of Patent: November 26, 1996
    Assignee: Atlantic Research Corporation
    Inventors: Michael Di Giacomo, Robert S. Scheffee, Charles D. Woods, Stephen Gold
  • Patent number: 5493171
    Abstract: A spark plug for use in an internal combustion engine comprises an electrically nonconductive body member and a pair of electrodes formed of a material each having titanium diboride as its major component. Tests indicate that titanium diboride electrodes are extremely resistant to electrical erosion. The spark plugs embodying the present invention are particularly useful in continuous cycle or heavy duty cycle engines that have heretofore been the subject of severe electrode erosion.
    Type: Grant
    Filed: October 5, 1994
    Date of Patent: February 20, 1996
    Assignee: Southwest Research Institute
    Inventors: Charles D. Wood, III, James Lankford, Jr., Cheryl R. Blanchard, James J. Cole, Gerald S. McAlwee
  • Patent number: 5345876
    Abstract: An inflation device including a pressure tank having stored therein a quantity of inflation gas under pressure, the pressure tank including a burst disk which prevents egress of the inflation gas from the tank, a sleeve member extending in substantially axial alignment with the burst disk, a piston having a first end portion slidably received in the sleeve member and having a second end portion which includes a cutting edge thereon for puncturing the burst disk. A first pyrotechnic material is positioned adjacent the first end portion of the piston, and a second pyrotechnic material is positioned externally of the sleeve member. Upon ignition of the first pyrotechnic material, a first combustion gas is produced which drives the piston to rupture the burst disk and permit the egress of the stored inflation gas.
    Type: Grant
    Filed: February 4, 1993
    Date of Patent: September 13, 1994
    Assignee: Atlantic Research Corporation
    Inventors: James Rose, Charles D. Woods
  • Patent number: 5331928
    Abstract: An engine having a variable piston capable of adjusting an engine's compression ratio while cranking or operating throughout an engine's speed/load range. Control may be obtained through varying the volume of lubricating fluid supplied to an inertia operated pump/accumulator device located in each multi-element piston. Fluid is supplied to said pump/accumulator device by means of a low pressure jet directed into an opening in the accumulator. No direct plumbing connection is required between the fluid source and the pump/accumulator device. Each piston includes an inner element conventionally mounted on a connecting rod and an outer element slidably mounted above and around said inner element. A chamber is formed between the upper surface of said inner element and the inside top surface of said outer element. Supplying a fluid into this cavity extends the upper portion of the piston, raising the engine compression ratio.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: July 26, 1994
    Assignee: Southwest Research Institute
    Inventor: Charles D. Wood
  • Patent number: 5257819
    Abstract: An inflator (110) including: a pressure means (12, 14, 16, 20) for storing a quantity of stored inflation gas under pressure. The pressure means including a first burst disk (46) in communication with the stored inflation gas and preventing egress of the gas from the chamber and a hollow sliding piston (172) having at one end thereof cutting edges (174) for puncturing the first burst disk (46). A shear disk (180) having a stationary outer portion (187) and a central portion or second disk (186), central portion is secured to one end of the piston (172) opposite the cutting edges (174). The central portion is capable of separating from the outer portion and moving with the piston (172). A quantity of propellant material (218) is provided near the second burst disk (80) to produce gaseous combustion products when burned.
    Type: Grant
    Filed: December 2, 1992
    Date of Patent: November 2, 1993
    Assignee: Bendix Atlantic Inflator Company
    Inventors: Richard L. Frantom, Robert J. Bishop, Robert M. Kremer, Klaus F. Ocker, Charles D. Woods, Donald W. Renfroe, James M. Rose, Teresa L. Bazel, Roy Brown
  • Patent number: 5199740
    Abstract: A device (20) for inflating an air bag (37) comprising: a pressure vessel (34) formed by a vessel part (22) and a generator body assembly (30). The generator body assembly is received within opposing openings (24, 26) in the vessel part (22) and secured thereto to provide a gas tight seal (28). The generator body assembly (30) includes: a first bore (38) to receive a quantity of propellant (150) and initiator assembly (120) to cause the propellant (150) to burn in response to a control signal indicative of a vehicle crash. Various passages are provided in the gas generator assembly and oriented to permit the products of combustion of the burning propellant to impinge on inner walls of the pressure vessel to reduce particulate emission.
    Type: Grant
    Filed: June 10, 1991
    Date of Patent: April 6, 1993
    Assignee: Bendix Atlantic Inflator Co.
    Inventors: Richard L. Frantom, Klaus F. Ocker, Robert M. Kremer, William E. Rogerson, William D. Gaw, Jr., Roy G. Brown, Teresa L. Bazel, Donald W. Renfroe, Charles D. Woods, Robert J. Bishop
  • Patent number: 5193495
    Abstract: The present invention is a valve control device (10) for an internal combustion engine (12). It comprises a housing (18) having a piston chamber (20), in which is mounted a power piston (22) for reciprocating movement. The power piston (22) is connected to the engine valve (26). An air reservoir chamber (62) connected to a high pressure air source (74), is formed above the piston chamber (20). A poppet valve (42) mounted on the upper surface of the power piston (22) blocks communication between the piston chamber (20) and the air reservoir chamber (62) when the power piston (22) is in its highest position. The air source (74) is also connectred to the upper portion of the piston chamber (20) through a timing valve (76), which controls flow of air to the piston chamber (20).
    Type: Grant
    Filed: July 16, 1991
    Date of Patent: March 16, 1993
    Assignee: Southwest Research Institute
    Inventor: Charles D. Wood, III
  • Patent number: 5076607
    Abstract: An inflator (10) comprising: a pressure tank (12, 14, 16, 20) for storing a quantity of stored inflation gas under pressure. The pressure tank comprising a first burst disk (46) in communication with the stored inflation gas; a sliding piston (72) including at one end thereof a sharp edge (74) for puncturing the first rupture disk and at its other end a second rupture disk (80). The sliding piston (72) movable into engagement with the first rupture disk in response to the build up of pressure acting on the second rupture disk (80) in response to the burning of propellant material (90) thereby permitting egress of the stored inflation gas. The second burst disk being ruptured by the continued build up of pressure due to the burning propellant whereupon after the rupturing of same the heated products of combustion resulting from the burning propellant flow through the sliding piston (72) to increase the temperature of the stored inflation gas prior to its exit from the inflator.
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: December 31, 1991
    Assignee: Bendix Atlantic Inflator Co.
    Inventors: Charles D. Woods, Donald W. Renfroe, James M. Rose, Teresa L. Bazel, Richard L. Frantom, Robert J. Bishop, Robert M. Kremer, Klaus F. Ocker
  • Patent number: 4768481
    Abstract: A process and engine using a homogeneous mixture of fuel and air but ignited spontaneously by high mixture temperatures produced by heating and by compression of the fuel charge in which a controlled rate of combustion is obtained by adding exhaust products to the fuel-air mixture. A combustion chamber is connected to the cylinder head of an internal combustion engine which is provided with a fuel and exhaust products which remain therein as fresh air is introduced into the cylinder due to a restricted entrance. A heater element at the entrance heats fresh air entering the combustion chamber on the compression stroke to produce spontaneous ignition of the homogeneous mixture.
    Type: Grant
    Filed: July 24, 1987
    Date of Patent: September 6, 1988
    Assignee: Southwest Research Institute
    Inventor: Charles D. Wood
  • Patent number: 4724800
    Abstract: An non-lubricated, ringless piston engine without a conventional heat exchange system having a cross-head guide for guiding and restraining the piston within a cylinder of a two-stroke engine. The piston-bore radial clearance gap is maintained during engine operation by means of a capacitance sensor controlling a temperature equilibrium flow system within the piston head and the cylinder jacket. The engine operates at high speeds to minimize horsepower losses due to gas leakage, while benefiting from reduced friction losses resulting from absence of piston rings. Blowing gases are collected and returned to the combustion chamber from a pumping chamber formed beneath the piston and above the cross-head guide.
    Type: Grant
    Filed: August 15, 1986
    Date of Patent: February 16, 1988
    Assignee: Southwest Research Institute
    Inventor: Charles D. Wood
  • Patent number: 4600052
    Abstract: A compact heat exchanger and method for making the same using the interior of randomly arranged interconnecting hollow spheres as a conduit for a first fluid and the exterior of same as a conduit for a second fluid of different temperature. The apparatus is constructed by fusing the points of contact between the objects of a packed cluster of objects, forming an impermeable layer on the fused objects and removing the fused objects to leave hollow shells interconnected at their points of contact. The interconnecting interiors of the hollow shells form an inner space to which fluid entry and exit ports may be provided to entry and exit manifolds. An outer interstitial space is realized by channeling the second fluid through the porosity in the cluster of shells comprised of the spaces outside the interconnected hollow shells.
    Type: Grant
    Filed: March 2, 1984
    Date of Patent: July 15, 1986
    Assignee: Southwest Research Institute
    Inventors: Charles D. Wood, III, Harvey S. Benson
  • Patent number: 4513576
    Abstract: The disclosure provides an oscillatable body mounting a cylinder defining an elongated fluid pressure chamber having at least one end thereof remotely located with respect to the axis of oscillation. The elongated fluid pressure chamber accommodates a free piston which reciprocates along the length of the chamber according to fluid pressure applied thereto. Solenoid operated inlet and exhaust valves are provided at each end of the elongated fluid pressure chamber, and sensing devices, responsive to the passage of the free piston therethrough are disposed on opposite ends of the elongated fluid pressure chamber and adjacent the medial portions thereof to control the operation of the inlet and exhaust valves in accordance with the desired objective to either maximize the extraction of mechanical energy from a pressured gas in the form of oscillating movements of the body, or maximize the expansion of the pressured gas to derive the greatest possible cooling effect therefrom.
    Type: Grant
    Filed: December 12, 1983
    Date of Patent: April 30, 1985
    Assignee: Centrifugal Piston Expander, Inc.
    Inventors: Edwin W. Dibrell, Charles D. Wood
  • Patent number: 4416229
    Abstract: A fuel injection system for a diesel engine is disclosed as having a single injector for injecting diesel fuel and alternative fuel into each combustion chamber of the engine in the form of a plume having diesel fuel at its tip so that the diesel fuel is ignited by the compression in the chamber and the alternative fuel is ignited by the ignition of the diesel fuel.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: November 22, 1983
    Assignee: Southwest Research Institute
    Inventor: Charles D. Wood