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| Number | Title | Issue Date |
| 6220423 | Lumber feed system with load responsive speed modulation The disclosure describes a system to provide a steady supply of lumber pieces to a board separating device and insure the correct positioning of each lumber piece, at the proper time, thus allowing the separating device to function at a substantially high... | 04/24/2001 |
| 6210169 | Device and method for simulating ophthalmic surgery A device for simulating ophthalmic surgery is disclosed which comprises a laser for generating a laser beam, an array for sensing whether the laser beam has been projected at the array, and a computer system operatively connected to the laser and the arra... | 04/03/2001 |
| 6205771 | Ducted fan gas turbine engine control system A control system for a ducted fan gas turbine engine (10) comprises a control unit (29) that receives input signals from a pressure transducer (27) located within the engine's fan duct (11) downstream of the fan (13) and a rotational speed transducer (32)... | 03/27/2001 |
| 6193247 | Portable stackable wagon assembly A portable, stackable wagon assembly includes a main compartment over which a handle structure is movable to an operational position; the main compartment includes side walls provided with support members for a tray that is insertable into the main compar... | 02/27/2001 |
| 6189814 | Gas turbine engine combustion chamber A gas turbine combustion chamber which has primary, secondary and tertiary combustion zones in flow series has a secondary mixing duct and a tertiary mixing duct. The secondary and tertiary mixing ducts reduce in cross-sectional area from their intakes to... | 02/20/2001 |
| 6179557 | Turbine cooling Shrouds (40) surrounding a stage of turbine blades (44) are cooled by a compressor airflow which is led to the downstream end of the shrouds before contacting them. The airflow passes through apertures (56) in plates (50) then over the shrouds (40) in an ... | 01/30/2001 |
| 6179551 | Gas turbine containment casing A containment casing for a gas turbine engine comprising a substantially rigid casing shell arranged in operation coaxially with an axis of rotation of the gas turbine engine. The casing extending circumferentially around an array of fan rotor blades whic... | 01/30/2001 |
| 6178868 | External pneumatic cushion system for air cylinder A system by which the air exhausted from either end of a pneumatic cylinder is directed, by an arrangement of control valves, to external surge tanks of appropriate volume where it is compressed to produce a deceleration effect at the end of each stroke b... | 01/30/2001 |
| 6179846 | Surgical head clamping device A patient head clamp is provided with two pairs of interconnected arms arranged so that the sleeves carrying skull penetrating pins will maintain the pins in alignment with the limits of the spatial separation of the arms of clamp.... | 01/30/2001 |
| 6170266 | Combustion apparatus A double wall structure for a gas turbine engine has an inner wall comprising a number of tiles. The outer wall is provided with a number of apertures through which air is directed into the space between the two walls. Inclined apertures are provided in t... | 01/09/2001 |
| 6168141 | Apparatus for treatment of fluent materials An apparatus and method of the heat treatment of a fluent food product with steam includes a pressure vessel having a steam inlet at one end and an a product outlet at the opposite end; an inner partition wall having an open end defines the product introd... | 01/02/2001 |
| 6164658 | Hydraulic seal A hydraulic seal (15) for providing a seal between two concentric shafts (10,12) of a gas turbine engine comprises a radially outer element (16) that defines an annular oil reservoir (21) and a radially inner element (22) having an annular fin (24) that p... | 12/26/2000 |
| 6155965 | Treatment of fly ash A method and apparatus for treatment of the fly ash are described wherein heavy metals are separated and wherein there is formed a leaching resistant slag; the fly ash is introduced into a reactor into an oxidizing gas stream which is heated to at least 2... | 12/05/2000 |
| 6151898 | Fuel injector A fuel injector (32) for a gas turbine engine combustion chamber (22) comprises a fuel injector nozzle (34) and a fuel feeding member (36). A wire mesh (76) is located in a space (74) defined between a hollow outer member (72) arranged around and spaced f... | 11/28/2000 |
| 6153889 | Method and an apparatus for inspecting articles An apparatus (42) for inspecting an as cast turbine blade (40), with impingement cooling passages (36) (see FIG. 2 ), comprises a vacuum pump (52) arranged to evacuate the interior of the turbine blade (40) through pipe (48) and valve (54) and a supply of... | 11/28/2000 |
| 6151538 | Control system A hybrid control system executes tasks within a transaction which is executed in a given order. The order in which the tasks are executed is inversely proportional to their deadlines. The deadlines are assigned an initial deadline D, an initial maximum en... | 11/21/2000 |
| 6148604 | Combustion chamber assembly having a transition duct damping member A combustion chamber assembly comprises a plurality of three stage lean burn combustion chambers (28) each of which comprises a primary combustion zone (36), a secondary combustion zone (40) and a tertiary combustion zone (44). Each of the combustion zone... | 11/21/2000 |
| 6146518 | Pressure differential control in an electrolytic cell An improved process for providing hydrogen from an electrolytic cell having an anolyte solution having an anolyte liquid level; a catholyte solution having a catholyte liquid level; generating oxygen at an oxygen pressure above the anolyte level; generati... | 11/14/2000 |
| 6138927 | Dual mode spreader A dual mode spreader includes a wheel supported container having a bottom wall provided with discharge openings feeding to a rotationally supported spreader disk; a skirt is mounted relative to the container to be movable to alter the distribution pattern... | 10/31/2000 |
| 6137388 | Resistive superconducting current limiter A superconductor is placed inside a non-metallic cryostat filled with a cooling medium to maintain the superconductor in a superconductive state. A foil winding is connected in series with the superconductor by current leads and the cryostat is placed ins... | 10/24/2000 |
| 6131384 | Suspension device for annular gas turbine combustion chambers In a gas turbine engine, the exit end of a combustion chamber of annular shape is suspended from the interior wall of the engine casing by an elbow structure which is detachably mounted on a flange by one of its two legs; the resilience of the elbow struc... | 10/17/2000 |
| 6132424 | Smooth and uniform laser ablation apparatus and method A laser beam delivery apparatus and a method for smoothly and uniformly ablating tissue, e.g., for reshaping a cornea of an eye, even in the face of real-world conditions such as a moving eye. The method includes defining a plurality of scan lines in an a... | 10/17/2000 |
| 6132527 | Nickel alloy for turbine engine components A new nickel base superalloy suitable for compressor or turbine discs of gas turbine engines with fatigue crack propagation resistance equal to Waspaloy, tensile strength higher than Waspaloy and higher operating temperature than Waspaloy or UDIMET 720 fa... | 10/17/2000 |
| 6129138 | Method of making a ceramic shell mould and a method of casting A wax pattern assembly (10) is removed from a ceramic shell mould (30) by removing a support member (20) from the wax pattern assembly (10). The ceramic shell mould (30) is then heated to melt the wax out of the ceramic shell mould (30). The removal of th... | 10/10/2000 |
| 6126092 | Twin chopper device for spray-up molding The twin chopper of the present invention consists of a pair of roving choppers, each chopper being disposed on either side of a resin spraying nozzle. Each chopper comprises a rotatably driven cutter roller, a rotatable friction roller cooperating with t... | 10/03/2000 |
| 6116612 | Fluid seal An annular seal is provided between a turbine rotor disc and the adjacent static structure. The seal comprises rotor fins extending from the turbine disc for rotation therewith and an abradable honeycomb layer radially outward of the rotor fins. The abrad... | 09/12/2000 |
| 6115919 | Heat exchanger An annular heat exchanger suitable for a gas turbine engine includes a first continuous sheet of material arranged in a spiral and a second continuous sheet of material arranged in a spiral. A first axially extending passage is defined between the first s... | 09/12/2000 |
| 6113742 | Digester having screening arrangement for isothermal cooking of fibrous material The present invention relates to a digester for continuous cooking under raised pressure and temperature of fibre material in a vertical digester (1), where input of fibre material and cooking liquid takes place at the top of the digester, withdrawal of s... | 09/05/2000 |
| 6113739 | Process for washing gas formed by gasifying black liquor Process for recovering chemicals and energy from black liquor, where the black liquor is gasified with CO, CO2, CH4, H2, and H2 S, in gaseous form, and Na2 CO3, NaOH and Na2 S, in the... | 09/05/2000 |
| 6109022 | Turbofan with frangible rotor support A ducted fan gas turbine engine (10) is provided with a fan (12) which is carried by a shaft (16). A frangible support member (27) maintains a coaxial relationship between the shaft (16) and the longitudinal axis (15) of the engine (10). In the event of s... | 08/29/2000 |
| 6105360 | Gas turbine engine combustion chamber having premixed homogeneous combustion followed by catalytic combustion and a method of operation thereof A gas turbine engine combustion chamber comprises a primary combustion zone and a secondary combustion zone downstream of the primary combustion zone. A catalytic combustion zone is arranged downstream of the secondary combustion zone and a homogeneous co... | 08/22/2000 |
| 6098399 | Ducted fan gas turbine engine A ducted fan gas turbine has a fan shaft which is supported at its upstream end by a bearing. In the event of damage to the engine's fan, frangible bolts fracture to permit radial movement of the shaft. That movement is limited by the sequential engagemen... | 08/08/2000 |
| 6089821 | Gas turbine engine cooling apparatus A gas turbine engine has an assembly of circumferentially spaced rotor blades each having a radial tip. A plurality of seal segments mounted for radial movement circumscribe the rotor blades. Each segment is connected to the casing through a seal carrier ... | 07/18/2000 |
| 6082966 | Stator vane assembly for a turbomachine A stator vane assembly for a gas turbine engine (10) compressor (16) comprises a plurality of circumferentially arranged stator vanes (44A) and a plurality of circumferentially arranged load bearing struts (46). The leading edges (45,47) of the stator van... | 07/04/2000 |
| 6079720 | Portable stackable wagon assembly A wagon assembly for use in gardening and lawn care comprises a wagon body structure which provides a main compartment. The main compartment accommodates the carriage of items and materials used in gardening and lawn care. A handle structure is pivotally ... | 06/27/2000 |
| 6079200 | Ducted fan gas turbine engine with fan shaft frangible connection A ducted fan gas turbine engine is provided with a fan which is carried by a shaft. Frangible fuse pins maintain the shaft carrying the fan coaxial with the engine longitudinal axis. In the event of severe fan damage, the fuse pins fracture and the fan sh... | 06/27/2000 |
| 6073439 | Ducted fan gas turbine engine A ducted fan gas turbine engine is provided with a fan which is carried by a shaft. Frangible fuse pins maintain the shaft carrying the fan coaxial with the engine longitudinal axis. In the event of severe fan damage, the fuse pins fracture and the fan sh... | 06/13/2000 |
| 6070407 | Ducted fan gas turbine engine with variable area fan duct nozzle The fan duct of a ducted fan gas turbine engine is provided with a secondary duct at least partly within the downstream end of the primary duct. The secondary duct is provided with means such as flaps whereby the airflow therethrough may be varied to suit... | 06/06/2000 |
| 6067792 | Apparatus for controlling cooling air in gas turbine engine In a gas turbine engine, compressor delivery air is fed into air inlets in hollow turbine nozzle guide vanes, and then ejected into the gas stream via holes in the vane walls. Valving is provided so as to provide modulation of the cooling airflow over and... | 05/30/2000 |
| 6068179 | Heat exchanger manufacture It is the norm to make diffusion bonded and superplastically formed heat exchanger panels from a trio of three sheet stacks, which employs four diffusion bonding stages and three superplastic forming stages. The concept described and claimed obviates one ... | 05/30/2000 |
