baber/WOPTO huggingface dataset:
Patent CA-2074972-C (CA)
Title: Pulsating fluid spray apparatus
Inventor: FREIER DONALD P
IPC: B05B3/04
Filed: 1992-07-30
Granted: 2000-03-07
Abstract: A fluid spray apparatus has an inlet assembly and an outlet assembly that are rotatable with respect to each other. The inlet assembly attaches to a fluid supply and has an outlet opening through Which the fluid passes. The outlet assembly has a plurality of inlets positioned to communicate with the outlet opening as the outlet assembly is rotated into different positions with respect to the inlet assembly.      Each inlet communicates with a different passage through the outlet assembly and has a set of openings that form a unique spray pattern. One of the fluid passages includes a circular chamber in which a forced vortex is created by the fluid flow. A turbine valve is disposed in the chamber and is driven by the vortex to alternately cover and expose one set of openings. The turbine valve and a chamber wall have textured surfaces to reduce friction. The turbine valve is made of an acetal plastic filled with silicone and polytetrafluorethylene to further reduce friction.      Appropriate selection of the sizes of inlet and outlet openings of the chamber regulates the pressure therein and optimizes the turbine operation.
Patent CA-2077509-C (CA)
Inventor: ALTEMOSE FRANCIS ALAN II
IPC: A62D101/08
Filed: 1992-09-03
Granted: 1997-10-07
Abstract: Les cendres volantes provenant de l'incinération de déchets urbains solides (DUS) peuvent, lorsqu'ils sont déversés dans des décharges, conduire au lessivage de plomb et de cadmium. On présente une méthode pour stabiliser les métaux lourds dans ces cendres, consistant à calciner dans un courant gazeux oxygéné à une température supérieure à environ 375 °C et sensiblement inférieure à 800 °C approximativement, pendant une période comprise à peu près entre 170 secondes et 5 heures, des cendres volantes qui ont été soumises à une purification par la chaux pour l'élimination des gaz acides. Ces cendres volantes de DUS ainsi traitées donnent des produits de lessivage renfermant des concentrations de métaux lourds inférieures aux limites fixées par l'EPA.
Patent CA-2081154-C (CA)
Title: Digital modulator with digital power control circuit
Inventor: SHIBATA TAKAYUKI
IPC: H03G3/20
Filed: 1992-10-22
Granted: 1996-11-19
Abstract: A digital modulator comprises a power control circuit for producing a digital power control signal, first and second digital multipliers for multiplying digital signals having orthogonal phase relationships with the digital power control signal, and first and second digital-to-analog (D/A) converters for converting digital output signals from the first and second multipliers into analog signals.  First and second low-pass filters are connected to outputs of the D/A converters, respectively, to filter out high frequency components.  An orthogonal modulator is provided for mixing orthogonal phase carriers with the outputs of the first and second low-pass filters to produce first and second orthogonally modulated signals and combining the modulated signals to produce a transmit signal, which is amplified for transmission.
Patent CA-2082263-C (CA)
Title: Chopper circuit for dynamic braking in an electric power conversion system
Inventor: KUMAR AJITH KUTTANNAIR
IPC: H02P3/22
Filed: 1992-01-24
Granted: 2001-03-27
Abstract: An improved electrical circuit configuration for a chopper circuit is disclosed which is particularly adapted for use with an inductive load such as a braking resistor (38) of the type used in many rapid transit vehicles. Instead of connecting a di/dt reactor directly in series with the electronic switch of the chopper circuit, a di/dt reactor (84) is connected in series with the freewheeling diode (46). Using this configuration, the di/dt reactor (84) does not have to continuously handle the average current through the electronic switch (42) during the entire chopping operation. Hence, a much smaller, lighter, and less expensive di/dt reactor (84) can be utilized.
Patent CA-2083224-C (CA)
Title: Method of and apparatus for controlling turbulence in a wall-bounded fluid flow field
Inventor: SIROVICH LAWRENCE
IPC: B64C21/10
Filed: 1992-11-18
Granted: 2000-10-17
Abstract: Turbulence in a wall-bounded fluid flow field having a turbulent wall region characterized by a system of roll pairs extending in the direction of flow, and propagating structures interacting with the system of roll pairs, is controlled by introducing into the turbulent flow, a disturbance that changes the character of the propagating structures directed at an inclined angle to the direction of flow. Where the disturbance increases the amplitudes of the propagating structure, turbulent mixing or heating is increased; and when the disturbance decreases the amplitude of the propagating structure, the turbulent drag is decreased.
Patent CA-2091547-C (CA)
Title: Centralizer
Inventor: SUDOL TAD A
IPC: E21B17/10
Filed: 1993-03-11
Granted: 1998-06-16
Abstract: A centralizer for downhole sucker rods such as those used in oil wells.  The centralizer has a central axial aperture for rotatable mounting on a downhole rod of a rod string.  The exterior surface of the centralizer is shaped to engage the well wall when brought into contact with the wall such that rotational movement of the centralizer is limited or stopped with respect to the wall.  Generally, the exterior of the centralizer is shaped to match the shape of the wall of the well in which it is to be used.  A centralizer for use with a well lined with a circular tubing thus has at least one exterior surface which in cross section defines an arc having a radius of curvature equal to that of the tubing interior.  A disclosed embodiment has six lobes having surfaces defining in cross section portions of three such arcs arranged symmetrically about the central aperture.
Patent CA-2094351-C (CA)
Title: Pole clamp
Inventor: STERN CARL M
IPC: A61M5/145
Filed: 1993-04-19
Granted: 1998-07-14
Abstract: A  belt  driven  infusion  pump  for  emptying  the contents of a syringe is disclosed.  The pump includes a syringe  pusher  including  an  antisiphon  catch  and  a pressure detector which is used for detecting occlusions or the end of  infusion.   A syringe clamp for locking a syringe in place is also provided.  The syringe clamp is spring-loaded and lockable.   A syringe position detector is provided to ensure the proper placement of the syringe prior to and during pumping.  A control knob is provided on the face of the pump for controlling both the locking of the syringe barrel clamp and the coupling of the drive belt with  a d.c.  motor.   The  pump  includes  a  housing having an elongated slot through which the syringe pusher is  connected  to  the  drive  belt.   A  sealing  band  is connected to the syringe pusher and is moveable with the syringe pusher for  sealing the slot against moisture or other contaminants.  A pole clamp assembly is incorporated within the pump housing and includes a clamping arm for securing  the  pole  between  the  clamping  arm  and  the housing.   The  clamping  arm  is  movable  to  a  storage position where it  is substantially flush with the outer surface of the pump housing.
Patent CA-2097381-C (CA)
Inventor: WETZLER GERD R
IPC: B61K9/06
Filed: 1993-05-31
Granted: 2002-03-19
Abstract: A monitor to diagnose wheel assemblies of passing railroad trains is provided herein. The monitor includes a cavity in, and parallel to, a measurement tie, or in a hollow railroad tie. The cavity houses infrared deflection units and at least one infrared detector which make it possible to monitor all heat sources present in the vicinity of the wheel assembly and the undercarriage of the train car while offering maximum protection against mechanical and electrical factors. The wheel pressure and accelerator pickups provided with the monitor allow accurate determination of the values needed to normalize the infrared test results, e.g., wheel position, wheel weight and tread conditions.
Patent CA-2116859-C (CA)
Inventor: HUNZIKER ERNST B
IPC: A61K31/727
Filed: 1992-08-19
Granted: 2003-01-14
Abstract: Methods and compositions are provided for the treatment and repair of defects in the cartilage or bone of humans and other animals as in full-thickness defects in joints. The defect in bone is filled with a matrix having pores large enough to allow cells to populate the matrix and to form blood vessels. The matrix filling the bone defect contains an angiogenic factor and also contains an osteogenic factor in an appropriate delivery system. To induce cartilage formation, a defect in cartilage is filled with a matrix having pores sufficiently large to allow cartilage repair cells to populate the matrix. The matrix filling the defect in carti-lage contains a proliferation agent and also contains a transforming factor in an appropriate delivery system. The matrix may al-so contain a chemotactic agent to attract cartilage repair cells. In a full-thickness defect, the defect sites in bone and cartilage are separated from each other by a membrane, which is sealed to the cartilage-bone junction and which prevents blood vessels and associated cells from penetrating from one site to the other.
Patent CA-2119474-C (CA)
Inventor: HOCHSPACH EDGAR
IPC: B21F1/02
Filed: 1994-03-18
Granted: 2000-05-23
Abstract: In a device for intermittent straightening of wire there are independent devices for wire feed and the straightening rotor. The speed of rotation (v2) of the straightening rotor varies essentially synchronously to the feed rate (v1) of the wire. To cut the wire (t4) the wire and rotor are stopped.      According to the invention the direction of rotation of the rotor is reversed between successive working cycles.
Patent CA-2124435-C (CA)
Title: Loading/unloading buoy
Inventor: BREIVIK KAARE
IPC: B63B21/50
Filed: 1992-03-30
Granted: 2001-09-11
Abstract: A buoy for use in loading or unloading of a flowable medium, espe-cially oil, the buoy (2) at its lower end being arranged for connection to at least one transfer line (6) and further being arranged to be introduced into a submerged downwardly open receiving space in a floating vessel (I), and the buoy (2) in operation forming a transfer connexion between the transfer line (6) and a tube system (41) on the vessel. The buoy (2) com-prises an outer buoyancy member (30) arranged for releasable locking to the receiving space (3) of the vessel (I) by means of a locking mechanism (56, 57) arranged therein, and centrally in the outer member (30) a rotat-ably mounted member (31) which forms a passage (32) for medium and at its ends is arranged for connexion to the transfer line (61 and the tube sys-tem (41) on the vessel (1), respectively. The buoy (2) at its upper end is connected to a means for hoisting and introducing the buoy into the re-ceiving space (3) of the vessel (1).
Patent CA-2126447-C (CA)
Title: Improved membrane for chemiluminescent blotting applications
Inventor: BRONSTEIN IRENA
IPC: C08J5/22
Filed: 1992-12-18
Granted: 2007-05-08
Abstract: A new and improved polymeric membrane for use in biological assays is provided. A blotting assay employing 1,2-dioxetanes as a source of chemiluminescent employs, as an improved membrane, a polymer comprised of at least one monomer of formula (1). The membranes reduce background signal, improve sensitivity and reliability.
Patent CA-2131455-C (CA)
Title: Selective crosslinking of hemoglobin by oxidized, ring-opened saccharides
Inventor: WONG LAWRENCE T
IPC: C07K1/107
Filed: 1994-03-11
Granted: 1998-08-18
Abstract: Hemoglobin for forming the basis of blood substitute is modified by crosslinking it by reaction with a polyaldehyde produced by ring opening oxidation of a di/tri-saccharide such as raffinose, wherein the o-saccha ride solutions are maintained and the reaction is conducted at a pH from about 5.0 - 7.0, and at a stoichiometry from about 1:1 - 4:1 based upon the molar ratio of di/tri-saccharide to hemoglobin tetramers, followed by appropriate reduction of the Schiff base linkages so form ed to stabilize them. Careful control of the pH of ring opening to the di/tri-saccharide ensures consistent production of the polyaldehy de without unwanted side products and reaction of this product with the hemoglobin at the specified stoichiometry leads to high yields of stabilized, tetrameric hemoglobin and oligomers thereof of predetermined composition and beneficial properties.
Patent CA-2131937-C (CA)
Inventor: COTE GERALD
IPC: G07F13/02
Filed: 1994-09-13
Granted: 1999-04-06
Abstract: A dispenser for razors having a housing, a helical coil for stacking and dispensing the packages of razors, coin activating means for activating the helical coil for dispensing one package from said housing, a shaving cream canister for containing shaving cream, a heating coil for heating a portion of said shaving cream, carbon dioxide pressurized canister for pushing the heated shaving cream, and a spigot for releasing the heated shaving cream from the heating coil.
Patent CA-2134224-C (CA)
Inventor: CHATTERJEE BIKASH K
IPC: F25C1/00
Filed: 1993-03-26
Granted: 2004-03-23
Abstract: The present invention provides methods and devices for freezing drops of liquid reagent solutions in a cryogenic liquid. In one embodiment, the apparatus of the present invention comprises mans for dispensing (22) uniform, precisely measured drops of a liquid reagent (4) and a rotatable carousel (36) positioned below the dispensing means (22). The upper surface of the carousel has a plurality of trays (58) each containing a cryogenic liquid, typically liquid nitrogen, for receiving the drops of liquid reagent. An alternative embodiment of the present invention comprises a tank (66) comprising a cryogenic liquid for receiving the drops of liquid reagent. The tank has a heat source (70) for slightly heating a portion of the cryogenic liquid such that a convection current in the cryogenic liquid provide mild agitation of the liquid and prevent aggregation of the frozen drops.
Patent CA-2145906-C (CA)
Title: Polymer compositions containing hydroxyl functional (meth)acrylates and hydroxylalkyl carbamate (meth)acrylates and mixtures thereof
Inventor: ARGYROPOULOS JOHN NICHOLAS
IPC: C08F220/28
Filed: 1995-03-30
Granted: 2000-01-11
Abstract: This invention relates to novel copolymers based on the copolymerization product of hydroxyl (meth)acrylate esters and (meth)acrylate esters of hydroxyalkyl carbamates; and other homopolymers and copolymers base on (meth)acrylate esters. In addition, novel copolymer blends may be formulated from individual copolymers based on hydroxyl (meth)acrylate esters and individual (meth)acrylate esters of hydroxyalkyl carbamates. Mixtures including crosslinking agents may be used to provide curable copolymer or copolymer-blend coating compositions.
Patent CA-2146680-C (CA)
Inventor: ILARDI JOSEPH M
IPC: H01L21/306
Filed: 1995-04-10
Granted: 2002-12-10
Abstract: Process for cleaning wafer substrates of metal contamination while maintaining wafer smoothness by contacting the wafer substrates with a cleaning composition comprising an aqueous, metal ion-free base and an amphoteric surfactant and optionally a metal complexing agent and a propylene glycol ether organic solvent.
Patent CA-2149193-C (CA)
Inventor: KERRY JAMES E SR
IPC: G01B3/14
Filed: 1995-05-11
Granted: 1999-04-06
Abstract: A template for facilitating marking of entry holes in a surface for passage therethrough of conduit has a flat portion formed of semi-rigid material and two flat sides. The flat portion has a central opening and a plurality of markings on one side.  The markings are parallel to a section of the perimeter and spaced inwardly at graduated distances therefrom.  A plurality of slots are formed through the flat portion, spaced apart and parallel to one another, substantially coextensively with each corresponding one of the plurality of markings, to thereby permit a user of the template to make a mark through one of the slots to indicate an outer edge of a hole of a preselected size to be formed using the template.
Patent CA-2149224-C (CA)
Inventor: MARKS DAVID NEIL
IPC: C08G69/26
Filed: 1993-11-05
Granted: 2003-09-09
Abstract: Polymers of aromatic diacids and 2-methylpentamethylenediamine are prepared in the presence of formic acid. The formic acid reduces the tendency of the 2-methylpentamethylenediamine to cyclize.
Patent CA-2150439-C (CA)
Title: Electroheating apparatus and methods
Inventor: REZNIK DAVID
IPC: A23L15/00
Filed: 1995-05-29
Granted: 2005-01-04
Abstract: Electroheating apparatus and methods utilize a dielectric structure defining a conduit course of relatively small cross-sectional area and electrode surfaces of relatively large area so that the electrical current density in a region of the conduit remote from the electrodes is substantially higher than the current density at the electrode surfaces themselves. The system uses relatively high electrical resistance and relatively high voltages to provide substantial heating effect with low total currents.      Foods such as liquid egg can be pasteurized.
Patent CA-2159496-C (CA)
Inventor: KAIMOTO TAKASHI
IPC: H01C7/02
Filed: 1995-01-27
Granted: 1999-05-04
Abstract: A flat PTC heater according to the present invention is formed by bonding one or a plurality of thin plate type PTC ceramic members (1) on a surface of each of which a pair of electrodes are provided to an insulator (3). When more than one thin plate type PTC ceramic members (1) are provided, electrodes (2) of the same polarity are electrically parallel-connected by lead wires (6). The occurrence of warpage, leakage and short-circuiting is prevented by forming a layer (4) of an elastic insulating material on an electrode-carrying surface.  The occurence of warpage after printing and firing operations is prevented by setting the thickness of the thin plate type PTC ceramic member to not less than 0.5 mm. In the resistance value regulating method according to the present invention, in which the resistance between the electrodes (2) on each PTC ceramic member (1) on the flat PTC heater is regulated, a conductive passage on an electrode pattern is cut off at an intermediate portion thereof, or predetermined portions (8) at which a conductive passage has been cut off in advance are connected by soldering, whereby the resistance between the PTC  ceramic members is regulated. In a thin PTC plate unit according to the present invention, a PTC thermistor element having a pair of electrodes on one surface thereof is fixed directly and closely on an insulating board, and an insulating board is pasted on the other surface of the thermistor element.
Patent CA-2166475-C (CA)
Title: Aqueous, multiphase, stable finished formulation for crop protection active compounds and its preparation
Inventor: WIGGER AUGUST
IPC: A01N25/04
Filed: 1994-06-27
Granted: 2004-02-24
Abstract: Described are stable, ready-to-use, multi-phase aqueous pesticide formulatio ns containing, in addition to water, a) 10 to 700 g/l of one or more pesticidal agents, b) 5 to 150 g/l of one or more dispersants, c ) 50 to 500 g/l of one or more wetting agents, d) 0.5 to 5 g/l of one or more thickening agents and, optionally, e) an organic solvent. Also described are methods of preparing such formulations.
Patent CA-2168782-C (CA)
Title: Liposuction apparatus
Inventor: NARAYANAN KRISHNA
IPC: A61M1/00
Filed: 1994-07-29
Granted: 1999-05-04
Abstract: A method for removing adipose tissue uses an elongate rigid tube or probe member (14) having a distal end (16) and a proximal end, and an axially extending lumen (20). An incision is formed in a skin surface of a patient, the tube being inserted through the incision into subcutaneous adipose tissues of the patient. Upon insertion of the tube through the incision, an ultrasonic pressure wave is generated at the proximal end of the tube, the waveform being transmitted through the tube to establish a standing wave therein. The standing ultrasonic wave in the insertion tube produces cavitation bubbles at the distal end of the tube, the bubbles causing liquefaction of adipose tissues of the patient at a surgical site located distally of the distal end of the insertion tube. Suction is applied to the lumen of the tube, thereby aspirating the liquefied adipose tissues from the surgical site through the lumen. During the entire procedure, the distal end of the tube and the adipose tissues at the surgical site are maintained at approximately body temperature. .
Patent CA-2175892-C (CA)
Inventor: GODOWSKI PAUL J
IPC: C07K14/705
Filed: 1994-11-18
Granted: 2000-03-07
Abstract: An assay for measuring activation (i.e., autophosphorylation) of a tyrosine kinase receptor of interest is disclosed. a) A first solid phase is coated with a substantially homogeneous population of cells so that the cells adhere to the first solid phase. The cells have either an endogenous tyrosine kinase receptor or have been transformed with DNA encoding a receptor or receptor construct and the DNA has been expressed so that the receptor or receptor construct is presented in the cell membranes of the cells. b) A ligand is then added to the solid phase having the adhering cells, such that the tyrosine kinase receptor is exposed to the ligand c) Following exposure to the ligand,the adherent cells are solubilized, thereby releasing cell lysate. d) A second solid phase is coated with a capture agent which binds specifically to the tyrosine kinase receptor, or, in the case of a receptor construc, to the flag polypeptide. e) The cell lysate obtained in step c) is added to the wells containing the adhering capture agent so as to capture the receptor or receptor construct to the wells. f) A washing step is then carried out, so as to remove unbound cell lysate. leaving the captured receptor or receptor construct. g) The captured receptor or receptor construct is exposed to a labelled anti-phosphotyrosine antibody which identifies phosphorylated residues in the tyrosine kinase receptor. h) Binding of the anti-phosphotyrosine antibody to the captured receptor or receptor construct is measured.
Patent CA-2176332-C (CA)
Title: Anticorrosion treatment of metal coated steel having coatings of aluminium, zinc or alloys thereof
Inventor: BUXTON DAVID PETER
IPC: C23C22/42
Filed: 1994-11-11
Granted: 2005-05-03
Abstract: The present invention relates to a method for treating a surface of zinc or of an alloy of zinc and aluminium, said method comprising the step of treating said surface with an aqueous solution having a pH of below 3 and comprising a complex formed from at least one species of metal oxo ion in conjunction with at least one species of hetero ion, the metal oxo ion being selected from the group consisting of molybdate, tungstate and vanadate; the hetero ion being selected from the group consisting of phosphorous (V), aluminium (III), silicon (IV), manganese (II), manganese (IV), zirconium (IV), titanium (IV), tin (IV), cerium (III) and nickel (II); and with a film forming acid tolerant resin compatible with the selected ions.
Patent CA-2187357-C (CA)
Inventor: STORRAR ANDREW MARTIN
IPC: G01F3/18
Filed: 1995-04-10
Granted: 2007-07-10
Abstract: The invention relates to a flow meter and in particular to a flow meter suitable for connection into a fluid conduit. There is provided a flow meter (1) having an inlet (2) and an outlet (3) for connection into a fluid line and comprising interconnected cylinders (10, 20, 30) each cylinder having a plurality of ports (11-17, 21-27, 31-37) controlled by a piston (100. 200, 300) axially-movable therein such that at any time the inlet and outlet are in fluid communication by a fluid pathway which includes two cylinders characterised in that there are three interconnected cylinders (10, 20, 30).