Abstract: A tractor blade assembly is disclosed having a first blade member and one or more replaceable, supplemental blade members. The first blade member has a supplemental blade mounting section extending laterally beyond the side edge of the first blade member and a supplemental blade member that removably attaches to the supplemental blade mounting section such that a side edge of the supplemental blade member abuts the side edge of the first blade member. The tractor blade assembly may include alignment structure to restrict vertical movement of the supplemental blade member relative to the first blade member and align the side edges.

Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants) and, in particular to a new and useful method and apparatus designed to remove and/or capture carbon oxides (e.g., CO2 or CO) from flue gas-, or combustion gas-, generating devices. In another embodiment, the present invention relates to a method for achieving emission control from flue gas-, or combustion gas-, generating devices where the method achieves a reduction in, or the elimination of, carbon oxides or sulfur oxides contained in the flue gas-, or combustion gas-, generating devices.

Abstract: Performing a hydraulic fracture test includes conveying a downhole sub in a borehole to a formation, the downhole sub including a first sealing member, a second sealing member, and an extendable member disposed between the first sealing member and the second sealing member. The first sealing member and the second sealing member are actuated to define a first isolated zone within the borehole. A fluid is introduced to the borehole wall via the extendable member to fracture the formation whether extended or not, and a property of the formation is estimated at least in part using an output signal from a downhole transducer.

Abstract: A one-piece blank for a multiple surface moldboard having a top edge, a bottom edge, an upper portion, and a lower portion is disclosed. The stamped one-piece blank has a central body section, and two opposed outer wing sections disposed at right and left ends of the central body section. First and second notches or cutouts are provided, and define the two opposed outer wing sections. The first and second notches are oriented vertically and are generally inverted v-shaped. A rolling operation forms the lower portion of the moldboard into a uniform curved radius, which occurs simultaneously in one operation. A bending operation creates an approximate 30-degree angle (into the curvature), along the top edge of the moldboard, bringing opposing radial lines together. A second bending operation creates a similar approximate 30-degree angle (into the curvature) along the top edge of the moldboard. The one-piece moldboard is finalized by welding the gaps remaining between the moldboard wings and the center section.

Abstract: A variable displacement axial piston pump is typically used to receive fluid from a tank and supply pressurized fluid through a control valve to move an actuator. The present variable displacement axial piston pump has a swashplate arrangement that is capable of being angled in two different directions to control the pressure transitions between the low pressure inlet port passage and the higher pressure outlet port passage as cylinder bores in a barrel of a rotating group rotate through trapped volume regions situated between inlet and outlet port passages of the axial piston pump. Movement of the swashplate arrangement in two different directions provides smooth pressure transitions and increases the operating efficiency of the variable displacement axial piston pump.

Abstract: A variable displacement axial piston pump is typically used to receive fluid from a tank and supply pressurized fluid through a control valve to move an actuator. The present variable displacement axial piston pump has a swashplate arrangement that is capable of being angled in two different directions to control the pressure transitions between the low pressure inlet port passage and the higher pressure outlet port passage as cylinder bores in a barrel of a rotating group rotate through trapped volume regions situated between inlet and outlet port passages of the axial piston pump. Movement of the swashplate arrangement in two different directions provides smooth pressure transitions and increases the operating efficiency of the variable displacement axial piston pump.

Abstract: An article of manufacture which has a high resistance to chemicals, solvents, and heat formed from a blend of (A) a polyamide, such as polycaprolactam; (B) a functionalized polyethylene, such as low density polyethylene; and (C) an unfunctionalized low density polyethylene. The blend has a melt viscosity suitable for extrusion into convoluted tubing, nonconvoluted tubing, sheets, films, and the like.

Abstract: A process is described for reducing the nitrogen content of a post combustion gas which comprises the steps of(A) generating NCO free radicals, and thereafter(B) adding the free radicals to the gas whereby the NCO free radicals react with the nitrogen oxide in the gas to form nitrogen and carbon dioxide.The NCO free radicals may be obtained from a variety of sources such as by the catalytic decomposition of cyanuric acid; the reaction of formaldehyde with nitrogen or nitric oxide; the reaction of carbon monoxide with nitrogen oxide or nitrogen or mixtures thereof; or the reaction of methanol with nitrogen in the presence of a catalyst. The NCO free radicals thus generated are effective for reducing the nitrogen oxide content of combustion gases in accordance with the process of the present invention at temperatures from ambient temperature up to about 2000.degree. F.

Abstract: An improved method is described for reducing the nitrogen oxide content of an effluent gas stream wherein the temperature of the gas varies. The improvement comprises alternately, depending upon the temperature of the gas, contacting the gas with(A) formaldehyde when the gas is at an elevated temperature which is sufficient to promote the reaction of formaldehyde with the nitrogen oxide in the gas and to reduce the nitrogen oxide content in the gas to a desired level, or(B) formaldehyde-derived free radicals capable of reacting with nitrogen oxide when the temperature of the gas is lower than the temperature in (A) and the reaction with formaldehyde does not reduce the nitrogen oxide content to the desired level, whereby the nitrogen oxide content of the gas is reduced to the desired level. The free radicals may be generated by reacting formaldehyde with nitrogen or nitrogen oxide in the presence of a catalyst. Preferred catalysts comprise zirconium, cerium, phosphorus, vanadium, or mixtures thereof.

Abstract: A method is described for promoting a reaction between nitrogen oxide and carbon monoxide which comprises conducting the reaction in the presence of a dysprosium-containing catalyst which is free of noble metals and metals of the first transition series. More particularly, a method is described for reducing the nitrogen oxide and carbon monoxide content of effluent gas streams derived from the combustion of fossil fuels by contacting the effluent gases with a catalyst comprising dysprosium which is free of metals capable of promoting the oxidation of carbon monoxide. Generally, the catalyst is contacted with the effluent gases at temperatures of from about 300.degree. F. to about 1200.degree. F.

Abstract: A method is described for decomposing cyanuric acid at temperatures of less than about 1000.degree. F., and the method comprises heating the cyanuric acid in the presence of a decomposition catalyst which is effective at below about 1000.degree. F. Examples of useful decomposition catalysts are zirconium, phosphorus and mixtures thereof. Preferably at least some of the zirconium or phosphorus is in the plus four oxidation state. A method also is described for reducing the nitrogen oxide content of gas streams which comprises contacting the gas streams containing nitrogen oxide with an amount of the gaseous decomposition product mixture obtained by decomposing cyanuric acid in the presence of a decomposition catalyst at a temperature of less than about 1000.degree. F.

Abstract: A method is described for converting formaldehyde to a gaseous product mixture capable of reacting with nitrogen oxide which comprises reacting formaldyhyde with nitrogen in the presence of a catalyst which is capable of promoting the reaction between formaldehyde and nitrogen at a temperature below about 1200.degree. F. The gaseous product mixture obtained in this manner is effective in reducing the nitrogen oxide content of combustion gases by mixing the gaseous product mixture with the combustion gas at temperatures from ambient temperature up to about 2000.degree. F.

Abstract: A method is described for decomposing cyanuric acid at temperatures of less than about 1000.degree. F., and the method comprises heating the cyanuric acid in the presence of a decomposition catalyst which is effective at below about 1000.degree. F. Examples of useful decomposition catalysts are zirconium, phosphorus and mixtures thereof. Preferably at least some of the zirconium or phosphorus is in the plus four oxidation state. A method also is described for reducing the nitrogen oxide content of gas streams which comprises contacting the gas streams containing nitrogen oxide with an amount of the gaseous decomposition product mixture obtained by decomposing cyanuric acid in the presence of a decomposition catalyst at a temperature of less than about 1000.degree. F.

Abstract: A method for concentrating an isotope from an admixture containing the isotope by contacting the admixture with a catalyst capable of selectively catalyzing a reaction with the isotope, and recovering the concentrated isotope from the reaction products. In one embodiment, the method can be used to concentrate deuterium from sources such as hydrogen-rich gas.