Patents Represented by Law Firm Phillips, Moore, Weissenberger, Lempio & Majestic
  • Dual fluid fuel nozzle
    Patent number: 4258544
    Abstract: A fuel nozzle for a gas turbine engine permits alternate use of different fluid fuels such as gaseous or liquid fuels without intermixing until delivery of the fuel to the combustion chamber. The nozzle provides concentric fuel delivery passages and allows for differing rates of expansion between the two passages.
    Type: Grant
    Filed: September 15, 1978
    Date of Patent: March 31, 1981
    Assignee: Caterpillar Tractor Co.
    Inventors: Daniel E. Gebhart, Brace C. Smith, D. Craig Young, Jerry A. Damerell
  • Plural image signal system for scanning x-ray apparatus
    Patent number: 4259582
    Abstract: Radiographic images are produced by situating a subject (13) between a scanning x-ray source (16) and an x-ray detector (14) to produce electrical signals indicative of variations of x-ray transmissivity in different regions of the subject (13). A signal processing system (11) enables simultaneous display of a plurality of visible images at a plurality of display devices (52 to 55) with each image emphasizing a different aspect of the information generated by a given scanning of the subject. A feedback circuit (68) from the detector (14) to the x-ray source (16) maintains the average level of the detector signal constant while allowing short term fluctuations so that only abrupt or brief changes of x-ray transmissivity in the subject are visible in a first image at a first display device (52).
    Type: Grant
    Filed: November 2, 1979
    Date of Patent: March 31, 1981
    Inventor: Richard D. Albert
  • Differential transmission with limited torque transmitter
    Patent number: 4258588
    Abstract: A differential transmission including a rotatable casing, a pair of pinion gears coupled to the casing, a pair of side gears engaged with the pinion gears, a pair of wheel axles engaged with the side gears, and a limited torque transmitter, in the form of a rotary pump, which pumps the transmission fluid. The torque transmitter develops internal torsional resistance only when the differential speed ratio of the axles exceeds a predetermined value, such as when one wheel slips.
    Type: Grant
    Filed: March 16, 1979
    Date of Patent: March 31, 1981
    Inventor: Robert S. Yum
  • Track assembly for track-type vehicles with dual link assemblies
    Patent number: 4257653
    Abstract: A track assembly (11) for a track-type vehicle (10) includes a pair of link assemblies (17,18) having inboard links (20,24) thereof solely engageable with the idler (13) and track rollers (14) of the vehicle (10). When the vehicle (10) traverses wet or swampy ground, wherein it proves desirable to utilize relatively wide track shoes (16), torsional loads imposed on the shoes can cause premature wear or damage to the shoes (16). The track assembly (11) exhibits a high resistance to such torsional loads imposed thereon and adapts itself for use in lieu of a standard track assembly on a conventional track-type vehicle. A method for prolonging the service life of the track assembly comprises interchanging the two link assemblies (17,18).
    Type: Grant
    Filed: August 23, 1979
    Date of Patent: March 24, 1981
    Assignee: Caterpillar Tractor Co.
    Inventors: Thomas C. Meisel, Jr., Robert N. Stedman
  • Ski stop assembly
    Patent number: 4257622
    Abstract: A ski stop assembly 12 including a pair of elongated members 14, 16 mounted for rotation with respect to each other about a common axis on the side of a ski. The ski stop assembly includes a torsion spring sandwiched between the elongated members and urging them to rotate with respect to each other to a position in which they extend at an angle to the axis of elongation of the ski. A preferred embodiment of the invention is described in which a pair of elongated members is mounted at each side of a ski. A preferred mounting structure is described.
    Type: Grant
    Filed: December 19, 1978
    Date of Patent: March 24, 1981
    Assignee: Anthony P. Manino
    Inventor: Gunther Mittermaier
  • Fluid control circuit for brakes and the like
    Patent number: 4256350
    Abstract: PCT No. PCT/US79/00598 Sec. 371 Date Aug. 13, 1979 Sec. 102(e) Date Aug. 13, 1979 PCT Filed Aug. 13, 1979Conventional fluid control circuits for brakes and the like normally comprise a control valve interconnected between a pressurized fluid source and the brakes for selectively actuating the same. A problem arises in that upon starting of the vehicle during cold weather conditions, the hydraulic fluid is not sufficiently warm to ensure efficient brake operation. This invention includes conduits (36) for sequentially communicating fluid from a fluid source (11), through an actuating chamber (14) of a brake (15), and to a control valve (25) in series when the brake (15) is either in its disengaged or engaged condition of operation. Furthermore, upon actuation of the valve (25), an operator is enabled to detect by "feel" the degree of brake engagement.
    Type: Grant
    Filed: August 13, 1979
    Date of Patent: March 17, 1981
    Assignee: Caterpillar Tractor Co.
    Inventor: Wayne A. Hoefer
  • Apparatus for controlling the position of the pivoting floor and strikeoff blade of an earthmoving scraper
    Patent number: 4255885
    Abstract: PCT No. PCT/US79/00927 Sec. 371 Date Nov. 1, 1979 Sec. 102(e) Date Nov. 1, 1979 PCT Filed Nov. 1, 1979An earthmoving scraper has a pivoting floor which pivots from a closed position to an open position to dump and spread material previously loaded into the bowl of the scraper. Various types of earth being loaded and spread require different dump openings of the pivoting floor and varying heights of the strikeoff blade which spreads the dumped earth. Heretofore, it has been difficult for the operator of the earthmoving scraper to selectively position the pivoting floor and strikeoff blade to insure a specific dump opening and a specific height of the earth material as it is spread.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: March 17, 1981
    Assignee: Caterpillar Tractor Co.
    Inventors: Roger R. Mitchell, Robert J. Trayler, Eugene M. Wilson
  • Gas-liquid equilibration apparatus
    Patent number: 4253845
    Abstract: Standards solutions and test samples are necessary for blood gas analyzers. Production of such standards and test samples has only been possible with relatively expensive apparatus. Such standards and test samples are provided herein by apparatus 10 which equilibrates a liquid 12 with a gas 14. The apparatus 10 includes a barrel 16 open at a first end 18 and at a second end 20. A piston 22 fits matingly reciprocally within the barrel 16. A flow control 26 allows the gas 14 to flow into the second end 20 of the barrel 16 and prevents the liquid 12 from flowing out of the second end 20 of the barrel 16. The gas 14 is allowed to flow out of the barrel 16 above a liquid level 44 therein. A method utilizing the apparatus 10 to prepare standard and test sample solutions is also set out.
    Type: Grant
    Filed: January 30, 1979
    Date of Patent: March 3, 1981
    Assignee: Analytical Products, Inc.
    Inventor: Ronald B. Smernoff
  • Heavy duty carriage guides
    Patent number: 4252216
    Abstract: The invention is concerned with an improved carriage guide and mast stiffener for a lift mast of the sort used on a lift truck or the like. Such a lift mast comprises a pair of spaced apart outer mast members, a pair of spaced apart inner mast members between the outer mast members, each slidably mounted in a respective one of the outer mast members and a carriage structure mounted on the inner mast members for translation therein. The improved structure of the present invention comprises a pair of rails each affixed to extend longitudinally along a respective outer surface of a respective one of the outer mast members and a pair of bearings affixed to the carriage structure, each snugly but slidably engaging a respective one of the rails and allowing relative longitudinal translation of the carriage structure relative to the outer mast members while preventing other translation therebetween.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: February 24, 1981
    Assignee: Towmotor Corporation
    Inventor: Charles R. Chelin
  • Adjustable battery restraint
    Patent number: 4252206
    Abstract: An adjustable apparatus (15) for rigidly restraining different sized objects (10) such as batteries which are resting on a frame (12), such as that of a lift truck vehicle (13). The apparatus has opposed first and second support members (16,17) upwardly rising from the frame. A rigid first strap structure (20) is pivotally attached (22) to the first support member, while a rigid second strap structure (29) is releasably attached (31 or 31') to the second support member. The strap structures are telescopable (49) one within the other to selectively adjust the length defined by the straps.
    Type: Grant
    Filed: March 16, 1979
    Date of Patent: February 24, 1981
    Assignee: Towmotor Corporation
    Inventors: Gary F. Burkholder, Jay B. Stotts, David L. Morrow
  • Energy conserving paving method and apparatus using microwave heating of materials
    Patent number: 4252459
    Abstract: Asphaltic concrete constituents (13) or the like deposited in a windrow (14a) along a surface (12) to be paved are molded into a preliminary narrow layer (14b) of greater height than the final layer (14d) of pavement to be formed on the surface and are then heated by directing microwave energy into the preliminary layer. The heated preliminary layer is then spread out to form the final thinner layer of paving material for smoothing and compaction. Molding means (37) for the preliminary layer and microwave heating means (38) may be carried on a vehicle (16) which travels along the windrow. The vehicle may also carry mixing, spreading and compaction means (39, 92, 89) or some or all of these elements may be on a separate paver vehicle.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: February 24, 1981
    Assignees: Microdry Corporation, Giselle V. Laurmann, Richard R. Blurton, Claire M. Blurton
    Inventor: Morris R. Jeppson
  • Method for fabricating wound hollow fiber dialysis cartridges
    Patent number: 4252765
    Abstract: In the manufacture of wound hollow fiber dialysis cartridges, rigid preliminary tube sheets are formed near each end of the winding, outwardly of the area of the winding which will ultimately be used in finished cartridges. The preliminary tube sheets are then cut transversely to the winding mandrel to expose the hollow fiber ends. The cut preliminary tube sheets, mandrel, and fibers now form a unitary structure which can be washed and treated to make the fiber surface easily adherable to the potting material from which the permanent tube sheets are thereafter formed. After forming the permanent tube sheet, the winding is cut into individual cartridges, and the preliminary tube sheets are discarded.
    Type: Grant
    Filed: January 16, 1980
    Date of Patent: February 24, 1981
    Inventor: Robert C. Brumfield
  • Microwave method and apparatus for heating pavements
    Patent number: 4252487
    Abstract: Pavement (12) is rapidly heated in depth by irradiation with microwave energy accompanied by supplemental surface heating which counteracts an inverted temperature gradient otherwise produced by microwave heating. Energy efficiency is increased by performing the surface heating with thermal energy derived from the exhaust gases of a motor (19) which drives a generator (18) to energize the microwave source (68). An energy applicator (36) simultaneously applies both the microwave energy and hot gas to a selected area of pavement while blocking release of microwave energy in upward and outward directions and is preferably attached to a mobile support (37) through support and positioning linkage (38) which enables shifting of the applicator between localized areas of pavement to be heated.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: February 24, 1981
    Assignees: Microdry Corporation, Giselle V. Laurmann, Richard R. Blurton, Claire M. Blurton
    Inventor: Morris R. Jeppson
  • Expansion control ring for a turbine shroud assembly
    Patent number: 4251185
    Abstract: A turbine shroud assembly includes an expansion control ring to support segmented rotor shrouds. The expansion control ring is restrained by adjacent manifold rings, yet free to thermally expand radially outwardly without loss of axial alignment with the associated turbine wheel. The ported manifold rings are positioned on either side of an outwardly extending leg of the expansion control ring to direct cooling fluid delivered thereto toward the expansion control ring. A spacer ring surrounds the expansion control ring and restrains the expansion control ring relative to the manifold rings. The spacer ring maintains axial alignment of the expansion control ring with the turbine wheel. Cooling fluid is exhausted into the main hot gas stream, both upstream and downstream of the turbine wheel thus substantially preventing hot gases from affecting the expansion control ring.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: February 17, 1981
    Assignee: Caterpillar Tractor Co.
    Inventor: Karl W. Karstensen
  • Shaker-striker vine harvester
    Patent number: 4250700
    Abstract: A mechanical grape harvester for trellis-supported grape vines having relatively rigid shaker members for engaging and shaking the rigid trunk structure of the vine and having relatively flexible striker rods for striking against the limber portions of the vine growth trained along the trellis wire. The shaker members and striker rods are both operated at minimal speeds to reduce leaf removal and plant damage.
    Type: Grant
    Filed: June 15, 1979
    Date of Patent: February 17, 1981
    Assignee: Up-Right, Inc.
    Inventors: Darrell C. Horn, Gerald L. Claxton
  • Shift actuator for a multi-speed transmission
    Patent number: 4250923
    Abstract: A shift actuator for a multi-speed transmission includes a valve body and a spool movably positioned in a bore defined in the valve body. Fluid pressure acts on one end of the valve spool while a rotary cam is manually positionable to move the spool to various operating positions. Porting communicating with the valve bore is selectively blocked by the spool in its various positions.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: February 17, 1981
    Inventor: Mark R. Johnson
  • Exhaust gas recirculation system for turbo charged engines
    Patent number: 4249382
    Abstract: An improved turbocharged engine system comprising a piston engine with an inlet manifold, an exhaust manifold, a turbine driven by exhaust gases for transporting a portion of the exhaust gas energy to drive a compressor between a gas intake and the inlet manifold. There is used as the exhaust manifold a first exhaust manifold receiving exhaust gases only from a first set of pistons and a second exhaust manifold receiving exhaust gases only from a second set of pistons. The turbine comprises a first turbine driven by first exhaust manifold exhaust gases. The compressor comprises a first compressor driven by the first turbine. A portion of the exhaust gases from the second exhaust manifold are recycled to the inlet manifold.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: February 10, 1981
    Assignee: Caterpillar Tractor Co.
    Inventors: Duane E. Evans, William L. Brown, Jr., Roger W. Johnson
  • Load resolver
    Patent number: 4249557
    Abstract: PCT No. PCT/US79/00968 Sec. 371 Date Nov. 8, 1979 Sec. 102(e) Date Nov. 8, 1979, PCT Filed Nov. 8, 1979An improved load resolver (41) is provided of the type which receives a pair of generally unequal pressure signals (32, 34), and which resolves the pair of pressure signals (32, 34) by blocking the lesser and transmitting the greater. Each pressure signal (32, 34) is sent to the load resolver (41) by a respective control valve (18, 20) in a hydraulic system (10). Prior load resolver structures have required angled or intersecting holes therein or special porting therearound. The improved load resolver (41) comprises a first member (58) having a first, axially extending hole (64) and a second member (72) having second and third axially extending holes (78, 104). The members (58, 72) are fitted within a bore (48) of a control valve body (19).
    Type: Grant
    Filed: November 8, 1979
    Date of Patent: February 10, 1981
    Assignee: Caterpillar Tractor Co.
    Inventor: Cyril W. Habiger
  • Current sensing circuitry
    Patent number: 4250501
    Abstract: A current sensing circuit arrangement for controlling the response of a circuit electrically isolated from the circuit in which sensed current is flowing. The input portion of the circuit arrangement provides paths for D.C. input current, one through a current sensing element and another through a light emitting diode circuit. The current-to-voltage characteristic of the current sensing element is such that changes in voltage across the element are substantially less than proportional to changes in current through the element. The light emitting diode circuit is connected in parallel with the current sensing element and produces light energy dependent on the voltage across the element. Light energy so produced is received by an electrically isolated light sensitive semiconductor device which device is for controlling the response of an output control circuit.
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: February 10, 1981
    Inventor: Kurt Pokrandt
  • Method of stabilizing fragrance oils
    Patent number: 4250165
    Abstract: Compositions of fragrance oils are stabilized with respect to potency and aesthetic quality toward the effects of heat and age by including in the formulations a quantity of alkylphenol ethers of polyethylene glycol, or more specifically, alkyl phenoxy polyethoxy ethanols wherein the polyether chain averages from 5 to 13 moles of ethylene oxide, and the alkyl portion of the molecule ranges from 6 to 20 carbon atoms. The alkyl portion of the molecule may be branched, unbranched, saturated or unsaturated. The oils are stabilized in respect to durability or intensity of odor with time and are rendered relatively insensitive to the deleterious effects of heating and/or aging in the presence of air. The presence of the stabilizers also eliminates the phenomenon of the "migration" of the perfume oil caused by repeated vaporization and condensation within an enclosed space.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: February 10, 1981
    Assignee: The Clorox Company
    Inventor: Lary L. Foley