Patents by Inventor C. Ludwig

C. Ludwig 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: 4475953
    Abstract: The invention relates to an emulsion and a method of making same based on adding water to a sulfur reaction product, the latter being prepared by reacting certain first and second hydrocarbons with elemental sulfur.
    Type: Grant
    Filed: February 24, 1983
    Date of Patent: October 9, 1984
    Assignee: Southwest Research Institute
    Inventors: Allen C. Ludwig, Larry W. Wolter, Henry F. Frazier
  • Patent number: 4451964
    Abstract: A pneumatic spring counterbalance extensible link including a closed end cylinder with an end connector a piston and rod assembly within the cylinder and maintained therein by the crimped over end portion of the cylinder retaining a rod bushing and rod to cylinder seal. The cylinder is pressurized prior to assembly of the complete piston and rod into the cylinder. The piston assembly includes orifice by-pass means either in the piston periphery or in a piston ring, and the piston may include a fail-safe provision in the event the orifice is clogged. A crimping die assembly is used in assembling and completing final assembly of the counterbalance components while simultaneously maintaining the link in a pressurized environment, utilizing sealed arrangement between the crimping dies to maintain pressurization of the interior of the dies and the counterbalance components prior to assembly of the components.
    Type: Grant
    Filed: September 15, 1982
    Date of Patent: June 5, 1984
    Assignee: AVM Corporation
    Inventor: George C. Ludwig
  • Patent number: 4451978
    Abstract: A pneumatic spring counterbalance extensible link including a closed end cylinder with an end connector a piston and rod assembly within the cylinder and maintained therein by the crimped over end portion of the cylinder retaining a rod bushing and rod to cylinder seal. The cylinder is pressurized prior to assembly of the complete piston and rod into the cylinder. The piston assembly includes orifice by-pass means either in the piston periphery or in a piston ring, and the piston may include a fail-safe provision in the event the orifice is clogged. A crimping die assembly is used in assembling and completing final assembly of the counterbalance components while simultaneously maintaining the link in a pressurized environment, utilizing sealed arrangement between the crimping dies to maintain pressurization of the interior of the dies and the counterbalance components prior to assembly of the components.
    Type: Grant
    Filed: September 16, 1982
    Date of Patent: June 5, 1984
    Assignee: AVM Corporation
    Inventor: George C. Ludwig
  • Patent number: 4434761
    Abstract: A fuel flow regulator for an internal combustion engine having an exhaust gas turbocharger is disclosed. The fuel flow regulator responds to intake manifold pressure. Thus the fuel flow regulator increases the maximum fuel flow to the internal combustion engine from a first maximum predetermined fuel flow rate when the intake manifold pressure is at a first predetermined intake air pressure level to a second predetermined maximum fuel flow rate when the intake air manifold pressure is at a second predetermined intake air pressure level. Additionally, the fuel flow regulator decreases fuel flow to a third maximum fuel flow rate which is less than the first predetermined maximum fuel flow rate when the intake manifold pressure is greater than the second predetermined intake air pressure level. Therefore, the fuel flow regulator protects the internal combustion engine from overboost of the engine by the turbocharger and for overfueling the engine.
    Type: Grant
    Filed: January 2, 1981
    Date of Patent: March 6, 1984
    Assignee: Tom McGuane Industries, Inc.
    Inventor: George C. Ludwig
  • Patent number: 4408751
    Abstract: A pneumatic, piston/cylinder counterbalance in which the counterbalance force is obtained by differential pressure across the piston and in which the force changes due to temperature are compensated by use of a variable volume cylinder having one or more auxiliary chambers separated by walls, each including a temperature responsive bi-metal disc valve normally acting as a check valve permitting flow into the auxiliary chambers but preventing flow out of the chambers except when the temperature drops to a predetermined value. In the multiple auxiliary chamber embodiment, flow into and out from each chamber is controlled by an associated bi-metal disc valve responsive to successively lower temperatures to enable a more linear stabilization of force output regardless of temperature.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: October 11, 1983
    Assignee: AVM Corporation
    Inventors: Daniel P. Dodson, George C. Ludwig
  • Patent number: 4363309
    Abstract: A sealed butterfly-type valve for an exhaust gas passage in an engine intake mainfold, the valve having a rotatably mounted stem carrying a gas flow modifying valve element disposed in the passage, and sealing against escape of exhaust gases along the stem is prevented by axially biasing the stem to urge an annular axial sealing face on the stem into engagement with an annular high temperature resistant bearing element of compressed graphite or the like surrounding the stem on the passage wall.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: December 14, 1982
    Assignee: AVM Corporation
    Inventor: George C. Ludwig
  • Patent number: 4351284
    Abstract: A liquid cooled internal combustion engine including a water heated plenum associated with the intake manifold and a temperature controlled plenum valve in the water line extending to or from the plenum and operable to control the flow of water. The temperature controlled plenum valve comprises a plastic body including a base wall and a peripheral wall and a plastic cap including a base wall and a peripheral wall surrounding the peripheral wall of the plastic body. The peripheral wall of the base has a radially outwardly extending annular rib and the peripheral wall of the cap has a radially inwardly extending rib. The ribs are adapted to pass over one another to provide a snap fit during assembly. The base wall of the body has integral O-ring retainer for retaining an O-ring. A bi-metallic disc is positioned in the body within the confines of the peripheral wall of the body and normally engages said O-ring and is operable to engage the O-ring when the water temperature exceeds a predetermined amount.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: September 28, 1982
    Assignee: Tom McGuane Industries, Inc.
    Inventor: George C. Ludwig
  • Patent number: 4350471
    Abstract: The roof rack 1 consists of a load carrying part 13 which is movable between a transport position above the roof 5 of a vehicle and a loading position at one side of, or at the rear of, the vehicle. The load carrying part 13 is pivotally mounted 14 to a carriage 9 which is adapted to slide in guides 7, 7' of a support frame 6, 3, 7, 7' which is fixed to the rain channel 4 of the vehicle roof. The movement of the load carrying part between the transport and loading positions is thus a combination of pivotal movement at the hinges 14 and displacement of the carriage 9 in the guides 7, 7'. Further guide members 17 which curve around the edge of the vehicle roof are usefully provided to help control the movement of the load carrying part.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: September 21, 1982
    Assignee: Binz GmbH & Co.
    Inventor: J. C. Ludwig Lehmann
  • Patent number: 4339146
    Abstract: A medically equipped vehicle has a cabin adapted to accommodate medical apparatus such as infusion flasks and respirators. These items of medical apparatus are located in containers 11, 12 which are pivotally fastened at 13 to a ceiling or associated part of the cabin. When not in use the apparatus can thus be stowed in an enclosed space defined between the container and the ceiling. The container can be pivoted downwardly to a hanging position in which the enclosed apparatus is readily accessible. To keep blood plasma and the like at the required temperature a heating device 41 or, a heat exchanger which can be used both for cooling and heating purposes, is incorporated in the container. The container is usefully of thermally insulated construction. Cables and lines necessary for the respirators and for infusion purposes are conveniently connected to the associated apparatus ready for use.
    Type: Grant
    Filed: August 28, 1980
    Date of Patent: July 13, 1982
    Assignee: Binz GmbH & Co.
    Inventor: J. C. Ludwig Lehmann
  • Patent number: 4339743
    Abstract: A multiple resistance element assembly having two parts, an insulator base and a multiple resistance element having expanded metal resistance members. The ends of the expanded metal resistance members are serially connected by contiguous non-expanded metal sections joining the ends of adjacent members. Tabs formed from contiguous non-expanded metal are bent normal to the plane of the resistance members and are inserted into mating slots formed in the base, and lock the multiple resistance element to the base.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: July 13, 1982
    Assignee: Tom McGuane Industries
    Inventor: George C. Ludwig
  • Patent number: 4310142
    Abstract: A fuel pressure regulator assembly comprising a housing, a diaphragm separating the housing into a first and second chamber. The housing has a radial inlet extending to the first chamber and a connector having an axial outlet is mounted in the housing and extends axially into the first chamber. The connector supports a sealing ring. The diaphragm supports a valve member that is adapted to engage the sealing ring, and a spring in the second chamber urges said valve member against the sealing ring. The fuel pressure regulator assembly includes provision for increasing the fuel regulation pressure by varying the effective diaphragm area.
    Type: Grant
    Filed: March 13, 1980
    Date of Patent: January 12, 1982
    Assignee: Tom McGuane Industries, Inc.
    Inventor: George C. Ludwig
  • Patent number: 4290816
    Abstract: Elemental sulfur is reacted in a certain manner with at least first and second hydrocarbons to form an asphalt-like material.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: September 22, 1981
    Assignee: Southwest Research Institute
    Inventors: Allen C. Ludwig, John M. Dale, Henry F. Frazier
  • Patent number: 4273157
    Abstract: A vacuum controlled three way butterfly valve for regulating the flow of fluids, as in internal combustion engine cooling systems and automotive heater systems, wherein a valve body includes a bypass port located in spaced relationship to the valve plate. In one position, the valve plate stops the flow of fluid through the valve body and permits the flow of fluid to return to the engine water pump. In the other position, the valve plate blocks off the bypass port, permits the flow of fluid through the valve body then restricts the throughput of fluid by means of a resilient orifice to protect the heater downstream of the valve core from excessive fluid pressure developed by the engine water pump and then to return the flow of fluid to the engine water pump.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: June 16, 1981
    Assignee: Tom McGuane Industries, Inc.
    Inventor: George C. Ludwig
  • Patent number: 4206732
    Abstract: An air cleaner temperature sensor for use in sensing the temperature of the air in an air cleaner and modulating the temperature of the air entering the air cleaner in response to the temperature in the air cleaner comprising a plastic body having an inlet adapted to be connected to a vacuum source and an outlet through which the vacuum can be connected to a motor for controlling the flow of air to the air cleaner. The body includes an opening to the ambient air surrounding the body, a valve in said opening and a bimetallic element is supported by the body and is operable to control the valve element such that the flow of air through the ambient air inlet is controlled by the bimetallic element, the body has a cover and an integral plastic hinge connecting the cover to the body. The cover has a portion thereof extending along the side wall of the body and an interengaging mechanical means between the cover and the body to lock the cover in position.
    Type: Grant
    Filed: October 30, 1978
    Date of Patent: June 10, 1980
    Assignee: Tom McGuane Industries, Inc.
    Inventor: George C. Ludwig
  • Patent number: 4204561
    Abstract: A fuel pressure regulator assembly comprising, a housing, a diaphragm separating the housing into a first and second chamber, the housing has a radial inlet extending to the first chamber and a connector having an axial outlet is mounted in the housing and extends axially into the first chamber. The connector supports a sealing ring in a groove. The diaphragm supports a valve member that is adapted to engage the sealing ring, and a spring in the second chamber urges said valve member against the sealing ring.
    Type: Grant
    Filed: February 24, 1978
    Date of Patent: May 27, 1980
    Assignee: Tom McGuane Industries, Inc.
    Inventor: George C. Ludwig
  • Patent number: 4200269
    Abstract: A self adjusting shock absorber comprising a cylinder and a shock absorbing piston movable in the cylinder and having a shaft extending externally of the cylinder. A reservoir is associated with one end of the cylinder. A flow passage is provided in the shock absorbing piston. A pump comprises a cylinder formed in the shock absorbing piston, and having a position sensing bleed orifice intermediate the ends thereof. A pump piston is fixed to the shock absorbing cylinder and is operable in the pump cylinder. The piston functions when in a position on one side of the position sensing bleed orifice to produce a pump "down" cylinder and when operating on the other side of the position sensing bleed orifice to provide a pump "up" cylinder. The pump piston has a first passage providing selective communication between the shock absorbing cylinder and one end of the pump cylinder, and a second passage providing communication between the shock absorbing cylinder and the other end of the pump cylinder.
    Type: Grant
    Filed: December 8, 1977
    Date of Patent: April 29, 1980
    Inventor: George C. Ludwig
  • Patent number: 4199671
    Abstract: A puffer circuit breaker characterized by adjustable wall means for regulating the pressure of an arc-extinguishing gas between separating contacts.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: April 22, 1980
    Assignee: Westinghouse Electric Corp.
    Inventor: Howard C. Ludwig
  • Patent number: 4189981
    Abstract: A combination throttle kicker and deceleration valve comprising a housing, and a wall dividing the housing. A first diaphragm is provided on one side of the said housing is adapted to engage said wall and prevent the flow of air through an opening in the wall. A second diaphragm is provided on the other side of the said wall, and has an orifice therein. A shaft is adapted to be moved by the second diaphragm upon movement of the second diaphragm away from the wall. The shaft extends exteriorly and is adapted to be linked to a throttle. Passages provide communication between the chambers formed by the diaphragms and the ends of the housing.
    Type: Grant
    Filed: December 30, 1977
    Date of Patent: February 26, 1980
    Assignee: Tom McGuane Industries, Inc.
    Inventor: George C. Ludwig
  • Patent number: RE30552
    Abstract: A fuel vapor vent valve comprising a plastic body including a base wall and a peripheral wall and a plastic cap including a base wall and a peripheral wall surrounding the peripheral wall of the plastic body. The peripheral wall of the base has a radially outwardly extending annular rib and the peripheral wall of the cap has a radially inwardly extending rib. The ribs are adapted to pass over one another to provide a snap fit during assembly. The base wall of the body has integral O-ring retaining means for retaining an O-ring. A bimetallic disc is positioned in said body within the confines of the peripheral wall of the body and normally engages said O-ring. Integral stop means on the cap are adapted to be engaged by the bi-metal disc when the disc is caused to move to a position out of engagement with the O-ring upon increase of the ambient temperature.
    Type: Grant
    Filed: June 25, 1979
    Date of Patent: March 24, 1981
    Assignee: Tom McGuane Industries, Inc.
    Inventor: George C. Ludwig
  • Patent number: RE31575
    Abstract: Elemental sulfur is reacted in a certain manner with at least first and second hydrocarbons to form an asphalt-like material.
    Type: Grant
    Filed: May 6, 1983
    Date of Patent: May 1, 1984
    Assignee: Southwest Research Institute
    Inventors: Allen C. Ludwig, John M. Dale, Henry F. Frazier