Patents Represented by Law Firm Wagner, Stellman, McCord, Wood & Dalton
  • Patent number: 4386534
    Abstract: A system for obtaining samples of the exhaust of a combustor for subsequent constituent level analysis and a method of determining constituent levels. The system includes inlets (10,26) for alternately delivering exhaust or ambient air to the system. System outlets (56,58) are sealingly coupled to sample receiving and collecting containers (60,62) and a pump (32) is connected to the inlets (10,26) to pressurize gases entering the system. The pump has an outlet (36) to an air cooled heat exchanger (38) which is cooled by a fan (40) to condense water vapor in the gases. The heat exchanger is connected by plumbing (48,50,52,64,66) to the system outlets (56,58) and a chemical gas dryer (54) may be connected in the system when ambient air is entering the system inlet (26). The method of analyzing the exhaust includes the steps of partially filling a sample collecting container with dried air and thereafter directing the exhaust to be analyzed into the sample collecting container.
    Type: Grant
    Filed: October 16, 1981
    Date of Patent: June 7, 1983
    Assignee: Caterpillar Tractor Co.
    Inventors: Michael S. Englund, Joseph C. Hafele, Dwain C. Schulze, Jr.
  • Patent number: 4323452
    Abstract: A system for transporting a highly corrosive liquid solely by pressure differential without the need of mechanical pumps for transporting the corrosive liquid. The system includes a source of gas under pressure (78,82) and first and second corrosive liquid reservoirs (22,24) connected in parallel to the source via a valve (80) such that one or the other, but not both, may receive pressurized gas. A valve (20) connects one or the other, but not both concurrently, of the reservoirs to a point of use (10) of the corrosive liquid and is specifically designed for connecting the reservoir receiving the pressurized gas to the point of use. A valve (36) receives corrosive liquid from the point of use and directs the same to one or the other, but not both concurrently, of the reservoirs, and is specifically designed to provide the corrosive liquid to the reservoir not then receiving pressurized gas from the source.
    Type: Grant
    Filed: November 3, 1980
    Date of Patent: April 6, 1982
    Assignee: Caterpillar Tractor Co.
    Inventor: Marion J. Witzenburg
  • Patent number: 4283366
    Abstract: A method of curing a green rubber tire (40) having a closed interior cavity (42) with two spaced ports (46,48) extending from the interior cavity to the tire exterior. The method includes the step of forming the tire on the porous, disintegratable core (44) and then positioning the tire within a pressure vessel (50). The pressure vessel and the interior cavity and porous core are then filled with a liquid (52) at an elevated temperature which is sufficient to cure the green rubber. The liquid is then circulated at the elevated temperature through the pressure vessel around the exterior of the tire and through the porous core and the interior cavity of the tire.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: August 11, 1981
    Assignee: Caterpillar Tractor Co.
    Inventor: Charles E. Grawey