baber/WOPTO huggingface dataset:
Patent CA-2032415-C (CA)
Title: Knife valve
Inventor: ROUSSEL RENALD
IPC: F16K3/02
Filed: 1990-12-17
Granted: 1995-01-24
Abstract: A knife valve comprises a body defining a valve seat and a knife blade  longitudinally movable by a cylindrical stem in the body for opening and closing a lateral flow passage defined therethrough. The body includes a bonnet with the stem extending therethrough and with circular packing rings being disposed therein around the stem.   The valve seat is located on a first side of the blade and in operative proximity thereto.    The stem includes a lower head portion which defines an angular surface,  whereas a top portion of the blade defines a slot forming an angular surface parallel to the angular surface of the stem head.   The stem head is engageable in the slot  with  the  angular  surfaces  thereof  being  in sliding contact.  Therefore, when the blade is in its closed position,  a longitudinal force exerted by the stem on the blade is transferred into a lateral force oriented towards the seat,  thereby forcing the blade against the seat in a tight bidirectional seal under a positive torque.   Angular lugs provided on a lower second side of the blade cooperate with tapered lower edges of the blade to also urge the blade against the seat in its closed position.  A bypass arrangement is provided in the bonnet to prevent the pulp fibers from accumulating in the stem guide and thus possibly hampering the operation of the valve.    An optional resilient seat can be mounted to the valve body on the first side of the blade.
Patent CA-2034005-C (CA)
Inventor: YOSHIZAWA YASUO
IPC: B30B1/06
Filed: 1990-06-06
Granted: 1994-07-12
Abstract: A movable fulcrum type lever apparatus comprising a lever member pivotally supported by a movable fulcrum. One end of the lever member is connected to a force point regulator, and the other end is connected to an action point regulator.  The fulcrum includes a roller which is in rolling contact with a fulcrum guide groove of a fulcrum guide member, and the lever member is pivotally supported on a roller shaft.  Alternatively, the fulcrum includes a slider inserted in the fulcrum guide groove. In this case, the lever member is pivotally supported on the slider.
Patent CA-2038045-C (CA)
Inventor: JAMES ROBERT C
IPC: B65B9/20
Filed: 1991-03-12
Granted: 1998-02-03
Abstract: METHOD OF AND APPARATUS FOR FORMING, FILLING AND SEALING PACKAGES            Abstract of the Disclosure Method of and apparatus for forming, filling and sealing packages in which flexible packaging material is formed into tubing,  the tubing is fed downwardly and transversely heat sealed at package length intervals by closing a pair of sealing members, the seal area is cut to form a top seal of the package being completed and a bottom seal for the next package to be formed,  a quantity of product with which the packages are to be filled is delivered into the lower end of the tubing to provide a fill for each package, the tubing is pinched closed, after the delivery of each fill, above and below the level of the next seal to be made, the pinches are maintained as the sealing members are opened, following the formation of the aforementioned top and bottom seals, to keep product for the next fill from dropping down on the bottom seal, and to hold the package being completed from dropping away, and air is blown on the top and bottom seals to cool them while the pinches are maintained.  The movement of the upper and lower pinch members between their open and closed positions are independent of the movement of the sealing members between their open and closed positions so that the timing of the opening and closing of the pinch members relative to the opening and closing of the sealing members may be varied.
Patent CA-2048215-C (CA)
Title: Durable and reusable incontinent underpads
Inventor: LEVY HARRY
IPC: A61F13/15
Filed: 1991-07-31
Granted: 1995-05-23
Abstract: The durable and reusable incontinent underpads of the inven-tion are 4-layer fabrics, incorporating a first layer of woven or knit fabric, a second layer of non-woven felt, a third layer of polyurethane film, and a fourth layer of woven or knit fabric.          The first and second layers are quilted together -- as by stitch-ing, or otherwise -- to from a fluid absorbing portion for the underpad.  The third and fourth layers are laminated together with a urethane adhesive to form a leakage preventing portion for the pad.  The second and third layers are also laminated together with the urethane adhesive to complete the underpad constructions.
Patent CA-2051848-C (CA)
Title: Tapping screw
Inventor: WAKAI TAKAO
IPC: F16B25/10
Filed: 1991-09-19
Granted: 1996-06-18
Abstract: A tapping screw having a screw shaft and a drill portion stepped into two or more sub-portions having different diameters gradually reducing toward the tip of the screw.  The small-diameter drill portion has a larger drill angle than the large-diameter drill portion.  The former firstly forms a starting hole and the latter expands it.  Thus a less force is required to turn the screw than a conventional tapping screw.
Patent CA-2059365-C (CA)
Title: Solid waste-to-steam incinerator capacity enhancement by combined oxygen enrichment and liquid quench
Inventor: GOFF STEPHEN PAUL
IPC: F22B31/04
Filed: 1992-01-15
Granted: 1996-04-23
Abstract: A process is disclosed for controlling the combustion and temperature in an solid waste-to-steam incineration system comprising a grated combustion zone and a steam boiler.  This control is achieved by a synergistic combination of oxygen enrichment of an air stream and liquid quench fed to the combustion zone.  The disclosed process includes the steps of adjusting the amount of solid waste passing into the combustion zone in order to maintain a constant flow of steam leaving the steam boiler, adjusting the amount of liquid quench to the incinerator in order to maintain a constant temperature in the combustion zone and adjusting the amount of oxygen enrichment of the air stream in response to a change in flow of the liquid quench to the incinerator.  An apparatus for accomplishing the foregoing is also disclosed.
Patent CA-2059987-C (CA)
Title: Purification of aminonitriles or diamines
Inventor: SIEJA JAMES BERNARD
IPC: C07C253/34
Filed: 1992-01-24
Granted: 2002-08-06
Abstract: Separation of an aliphatic aminonitrile or an aliphatic diamine from a mixture containing the corresponding cyclic, aliphatic, mono-unsaturated amine by adding caustic compound to the mixture and then distilling the aminonitrile or the diamine at a temperature less than 170°C and at a pressure of less than 1 atmosphere.
Patent CA-2060313-C (CA)
Inventor: REYMOND WELLES K
IPC: H01R12/50
Filed: 1990-06-11
Granted: 2001-08-14
Abstract: A pluggable electrical connector (10) is provided having contact elements (20) with first ends (32) soldered to a daughter board (40), mid-sections (36) which are crimped and bent through ninety degrees, and second ends (34) which have a converging portion and which terminate in bifurcated conical contact portions (34) which make contact with the rims of contact-quality plat-ed through holes (51) of a mother board (50). By causing contact between the rim and the cone surface, normal forces greater than the mating force are generated. The connector housing (30) includes self-centering funnel openings (66) adjacent the mother board for centering the converging portions (37) of the contact elements (20) therein in a nominal position and for acting as a pre-loading stop. The housing also includes side-wall locking tabs (72) which hold adjacent rows of contacts at identical fixing points relative to the ninety-degree bend to ensure identical spring parameters for all contact elements.
Patent CA-2067390-C (CA)
Inventor: VAN BUREN FREDERIK ROELOF
IPC: C07C15/46
Filed: 1990-10-29
Granted: 2001-05-08
Abstract: Un catalyseur comprenant un matériau de support poreux et à forme adaptée sur lequel est appliqué sous forme finement divisée un composé actif sélectionné parmi au moins un composé de vanadium, de chrome, de manganèse, de fer, de cobalt, de nickel, de cuivre et de zinc, et éventuellement un promoteur sélectionné parmi au moins un composé de métal alcalin(o-terreux), son procédé de préparation, et son utilisation lors de la déshydrogénation des hydrocarbures.
Patent CA-2068630-C (CA)
Title: Use of protein c or activated protein c
Inventor: EIBL JOHANN
IPC: A61K38/00
Filed: 1992-05-13
Granted: 2003-04-22
Abstract: There is disclosed the use of protein C or activated protein C for preparing a drug useful far the maintenance and improvement of the microcirculation in patients suffering from circulatory disturbances, in particular with the proviso that the drug does not contain any immunoglobulin G.
Patent CA-2071471-C (CA)
Title: Ink tank provided with a pathway for introducing ink, ink jet device having the tank and ink jet recording apparatus
Inventor: AONO KENJI
IPC: B41J2/175
Filed: 1992-06-17
Granted: 1998-08-18
Abstract: An ink tank for storing ink to be supplied to recording means which comprises a bag-like member arranged in inner space of the ink tank and communicating with the atmosphere, which has a volume variable from a substantially zero state to a volume substantially equal to that of the inner space of the ink tank; ink stored in a space region defined between the ink tank and the bag-like member; and a rough portion formed in an inner wall surface of the ink tank.
Patent CA-2072966-C (CA)
Inventor: JOHNSTON RONALD ALLEN
IPC: B60L50/12
Filed: 1990-11-23
Granted: 2000-06-27
Abstract: An improved method and apparatus are disclosed for powering and controlling the operation of large diesel-electric off-road haulers of the type in which hauler drive wheels (144, 146) are propelled and retarded by DC electric wheel motors (132, 134) powered from a board generator (116), optionally supplemented by DC power, from external trolley lines, In the disclosed system, thyristor-type converters (124, 126) connected into the system AC power grid (118) are used to receive supplemental external power from DC trolley lines and supply it into the AC power distribution grid (118) in the propel mode. The use of such thyristor-type converters (124; 126) makes possible the use of supplemental trolley line power without provision of separate switching or control gear to operate the DC wheel motors when trolley line power is received. Thyristor-type converters also may be used to supply current (generated by wheel motors (132, 134) in the retarding) mode to retarding resistors (176), making possible the use of the initial electrical power generated by the wheel motors to replace load requirements of the diesel engine (112), resulting in substantial fuel savings.
Patent CA-2073951-C (CA)
Title: Separation of normally hydrophobic plastic materials by froth flotation
Inventor: HWANG JIANN-YANG
IPC: B29B17/02
Filed: 1992-07-15
Granted: 1996-12-03
Abstract: A targeted particulate, synthetic organic plastic material having normally hydrophobic surface characteristics is separated from a mixture of two or more of such plastic materials by conditioning the mixture of plastic materials in a flotation cell or the like with a heteropolar surfactant which has a hydrophile-lipophile balance (HLB) value greater than 5 and which selectively depresses the targeted plastic material by making the surfaces thereof more hydrophilic without substantially affecting the surfaces of the other plastic material(s) and introducing gas bubbles into the resulting conditioned pulp such that the gas bubbles selectively adhere to the surfaces of the other plastic materials(s) and cause them to float.  The targeted plastic material is recovered in the cell product and the other plastic material(s) is recovered in the float concentrate.
Patent CA-2075462-C (CA)
Title: Bump structure and method for bonding to a semi-conductor device
Inventor: ERDOS GEORGE
IPC: H01L21/60
Filed: 1992-01-27
Granted: 1999-05-04
Abstract: A bump structure for bonding leads to a semi-conductor, in which the bump has a thin lower portion which overlaps and seals the edges of the passivation layer, and a thicker upper or stem portion of smaller lateral  dimensions  to  fit within the margins  of  the opening in the passivation layer.  Thus, during bonding, downward compressive forces are applied primarily through the bump stem directly to the metal  termination pad beneath the bump, and very little force is applied to the edges  of  the  passivation  layer.    This  reduces  the likelihood  of  passivation  layer  cracking,  increasing device reliability.   Because the bump stem is  formed within the margins of the passivation layer opening, it has a flat top, resulting in better lead bonding.
Patent CA-2075586-C (CA)
Inventor: VOGELBACHER UWE JOSEF
IPC: A01N43/54
Filed: 1992-08-07
Granted: 2002-12-31
Abstract: Salicyloyl(thio)ether derivatives of the formula I,   where X is oxygen or sulfur and Z is carbon or nitrogen, and the radicals R1 to R4 and A have the meanings given in the disclosure, and processes form preparing the same.        These derivatives have improved herbicidal properties or other properties desirable in crop protection, such as growth-regulating or fungicidal activity.
Patent CA-2078668-C (CA)
Inventor: BROWN ROY G
IPC: B60R21/263
Filed: 1991-03-27
Granted: 1997-12-30
Abstract: An inflator (10) for an air cushion including a pressure vessel comprising a hollow sleeve (22) for storing a quantity of inert gas such as Argon. One end of the sleeve is closed by a first pyrotechnic actuator assembly (80) while the other end of the sleeve may include a closed end or another pyrotechnic actuator assembly (40). The pressure vessel (20) is secured within a diffuser (130) which directs inflation gases into the air cushion. The pressure vessel (20) in cooperation with the diffuser (130) defines various regions which assist in reducing the gas turbulence and heat transfer between the gas and the diffuser (130).
Patent CA-2080577-C (CA)
Title: Rotary vane compressor with reduced pressure on the inner vane tips
Inventor: GANNAWAY EDWIN L
IPC: F01C21/08
Filed: 1992-10-14
Granted: 1998-07-28
Abstract: In a rotary vane hermetic compressor an improved loading structure is provided for the vanes. A pressure reducing means incorporated into the compressor rotor reduces the frictional loading of the vane tips against the compressor walls. A passageway vents fluid at suction pressure into a cavity in the rotor containing the inner tips of the sliding vanes.
Patent CA-2083117-C (CA)
Title: Surface covering
Inventor: COLYER TIMOTHY DAVID
IPC: B32B27/04
Filed: 1992-11-17
Granted: 2001-11-27
Abstract: A multi-dimensional image is obtained in a substantially flat surface covering by aligning the platelets of a platey material in the optical surface of the surface covering parallel to the exposed surface of the surface covering and realigning predetermined plate-lets to a predetermined angle with respect to the ori-ginal alignment. The platelets can be realigned by pressing a gelled transparent or translucent element into the platey material containing layer or by mechani-cally embossing the platey material containing layer.
Patent CA-2090758-C (CA)
Title: Variable depth grooved drill string member
Inventor: WINSHIP THOMAS E
IPC: E21B17/22
Filed: 1991-06-25
Granted: 1998-07-28
Abstract: An intermediate weight member (10) having a variable cross-section or bending moment of inertia as a function of member length is disclosed.  At one end of the member (10) a slip and elevator section (14) is provided.  A partially grooved section (16) of a diameter greater than that of the slip and elevator section extends between the slip and elevator section (24) and the other end of the member (10).  The partially grooved section (16)  includes two variable depth grooved sections  (18,  20) separated by an ungrooved section (22).  The ungrooved section (22) includes hardbanding rings (26, 28).  The spiral grooves (30A, 30B, 30C) of variable depth grooved section (18, 20) vary in depth as a function of member length such that the bending moment of inertia varies as a function of length from the slip and elevator section (14) to the lower end of the member (10). Such variation changes from a constant bending moment of inertia at the slip and elevator section (14) to a substantially greater bending moment of inertia at the ungrooved section  (22)  and thence to a lower bending moment of inertia of a reduced diameter section (24) at its other end.
Patent CA-2091764-C (CA)
Title: Probe compositions for chromosome identification and methods
Inventor: BITTNER MICHAEL LOUIS
IPC: C12Q1/68
Filed: 1991-09-19
Granted: 2003-04-08
Abstract: Direct label probe compositions which stain DNA of a preselected single chromosome or region of a chromosome of a multi-chromosomal genome are provided that comprise mixed DNA segments which are covalently bound to fluorophore groups through linking groups. The mixed DNA segments are derived from the DNA  present in the preselected chromosome or chromo-some region. These probe compositions can be used concurrently or sequentially with other probe compositions.
Patent CA-2094200-C (CA)
Title: Austenitic stainless steel with high workability and with improved cold working properties
Inventor: BLETTON OLIVIER
IPC: C22C38/00
Filed: 1993-04-16
Granted: 2002-08-13
Abstract: A weldable austenitic stainless steel with high machinability and improved cold workability, characterised in that its weight composition is the following: C lower than 0.1 %, Si lower than 2 %, Mn lower than 2 %, S lower than 0.03 %, Ni between 8 and 10 %, Cr between 15 and 25 %, P lower than or equal to 0.04 %, Mo lower than 0.5 %, Cu between 1 and 5 %, N between 0.02 and 0.07 %, Ca higher than 30x10<-4> %, O higher than 70x10<-4> %, Al lower than 50x10<-4> %, the Ca/O ratio being between 0.3 and 0.6.
Patent CA-2097494-C (CA)
Inventor: ZOELLER JOSEPH R
IPC: C07C51/12
Filed: 1991-12-03
Granted: 1997-12-23
Abstract: Procédé en continu pour la préparation d'anhydride acétique, par carbonylation d'un mélange renfermant (i) de l'iodure de méthyle et (ii) de l'acétate de méthyle et (ou) de l'oxyde de diméthyle, en présence d'un catalyseur au rhodium et d'un activateur, la concentration d'oxyde de mésityle dans le mélange de carbonylation étant supprimée par la présence d'au moins 100 ppm d'ion ferreux et (ou) cobalteux dissous.
Patent CA-2098233-C (CA)
Title: Toner for developing electrostatic image and image forming method
Inventor: HAGIWARA KAZUYOSHI
IPC: G03G9/087
Filed: 1993-06-11
Granted: 1999-06-29
Abstract: A toner for developing an electrostatic image is composed by a binder resin, and a magnetic material and/or a colorant.  The binder resin (a) comprises a styrene resin polymerized in the presence of a poly-functional polymerization initiator, (b) provides a molecular weight distribution on a GPC chromatogram showing a maximum (P1) in a molecular weight range of 3.5x10 3 - 5x10 4 and a  maximum (P2) or shoulder in a molecular weight range of at least 1x10 5, and (c) contains 15 wt. % or less of a resin component in a molecular weight range of at most 3x10 3.  Further, the toner contains at most 100 ppm of styrene and benzaldehyde.
Patent CA-2099249-C (CA)
Title: Method for controlling oil reservoir permeability using biomass oil
Inventor: HIMMELBLAU ANDREW D
IPC: C08G8/04
Filed: 1992-01-24
Granted: 1995-06-27
Abstract: A method for controlling the permeability of a petroleum-bearing subterranean formation including the steps of producing from biomass, a water-insoluble viscous biomass oil (364) and injecting the biomass oil into the petroleum bearing formation to decrease the permeability of at least some of the formation for altering flow paths through the formation to increase petroleum yield.
Patent CA-2102193-C (CA)
Inventor: FUKAYA MASUHIRO
IPC: B01J23/68
Filed: 1992-03-31
Granted: 1996-11-12
Abstract: a metallic carrier for an automobile catalyst, comprising a metallic honeycomb and  a  jacket, characterized in that a foil material constituting the metallic honeycomb is comprised by an Fe-Cr-Al-base alloy and has high-temperature proof stresses of 22 kgf/mm2 or more and 11 kgf/mm2 or more  respectively at 600°C and 700°C with the foil material as annealed at a temperature of the recrystallization temperature of the foil material or above.
Patent CA-2104224-C (CA)
Title: Piston-based ventilator design and operation
Inventor: YOUNES MAGDY
IPC: C23C18/08
Filed: 1992-02-12
Granted: 1997-03-18
Abstract: Improvements in piston-based ventilator design and operation are described. In one aspect, individual compensation of force dissipation within the gas delivery system is effected, so that the desired gas pressure is delivered to the patient airway with-out the necessity for monitoring the actual pressure and using it as feedback. In another aspect, a piston (14) is dimensioned slightly less than the chamber wall (12) of the pump to define a gap (18) through which an acceptable amount of gas may leak but which eliminates the need for a physical seal, thereby minimizing the frictional resistance within the pump.
Patent CA-2107387-C (CA)
Inventor: CRICK ANDREW P R
IPC: G06F21/62
Filed: 1993-09-29
Granted: 2001-02-27
Abstract: A computer method and system for allocating memory for a plurality of software routines. Before execution of the software routines, a collective buffer is allocated. Each software routine is assigned an offset within the collective buffer. Each software routine may then use the portion of the collective buffer starting at its offset as its dynamically allocated work space. To allocate the collective buffer, a collective buffer size is first determined which is sufficient to satisfy the total dynamic memory requirements of the software routines. In determining the collective buffer size, the size of a software routine buffer required by each software routine is accumulated into the collective buffer size. As each software routine buffer size requirement is accumulated, the interim total is stored as the offset for the next software routine. When the last software routine buffer size requirement is accumulated, the total indicates the collective buffer size. A collective buffer of the collective buffer size is then allocated. When the software routines are executed, each software routine uses a portion of the collective buffer referenced by its assigned offset. When all the software routines complete execution, the collective buffer may then be deallocated. In a preferred embodiment, the memory is allocated to a software system having a layered architecture including an application program and a device driver comprising a plurality of component device drivers.
Patent CA-2110711-C (CA)
Title: Telephone marketing system
Inventor: GREGOREK MARK R
IPC: H04M3/48
Filed: 1992-06-18
Granted: 2002-10-15
Abstract: A marketing system (10) selectively modifies an existing telephone network by modifying a portion of the call processing software of the existing telephone network and by replacing at least a portion of an audible cable progress signal generated by the telephone network by a prerecorded announcement. A calling party places a telephone call at a first telephone (12) to an identifi-ed called party at a second telephone (20) having a particular calling status.  Once the call is made to the identified called party, a swith (22) or an associated network signaling system (23) determines the busy/idle status of the second telephone. In place of the usual ringing or busy signal, an announcement indicates to the calling party the status of the identified called party and a series of announcements are played for a predetermined period of time. During the announcements, the system continues to determine the status of the telephone line of the second telephone. The announcements are played until the call is completed or abandoned.
Patent CA-2111174-C (CA)
Inventor: SCHULTE THOMAS ROBERT
IPC: B01J19/00
Filed: 1993-12-10
Granted: 1999-05-25
Abstract: The present invention relates in general to coolant gas recovery systems, more particularly to helium recovery systems associated with optical fiber cooling means.