Abstract: The present invention relates to a lever for rotating about its pivot a turbomachine variable-pitch stator vane comprising three zones: a first zone for attachment to a lever drive member, a second zone for attachment to said variable-pitch stator vane, and a third zone of elongate shape between the first zone and the second zone, wherein a vibration-damping laminate is applied to at least one surface portion of at least one of said zones of the lever, the laminate comprising at least one layer of viscoelastic material in contact with said surface portion and a backing layer of rigid material.

Abstract: A pneumatic tire with an improved balance between noise reduction and hydroplaning resistance as the tread wears. The tread of the pneumatic tire includes skewed tread blocks having walls that, as the tread wears, change the character of the lateral and circumferential channels in the tire footprint to better optimize noise reduction and hydroplaning resistance.

Abstract: The invention provides an antenna characterized in that it comprises a generator and at least two metal surfaces that are mutually parallel and substantially superposed; at least one of the surfaces being split into at least two concentric portions constituting a central portion and a strip surrounding the central portion; said at least two portions being interconnected by one or more conductive strips or wires; the at least two superposed surfaces being interconnected by at least one conductive wire or strip; and the at least two portions of the split surface including a portion connected to a first terminal of the generator and a portion connected to a second terminal of the generator; this structure imparting multifunctional behavior to the antenna.

Abstract: The invention relates to an antenna comprising: a first electroconductive surface; a second electroconductive surface which forms a ground plane and is parallel to the first; a first electroconductive feed belt or wire connecting a first terminal of a generator/receiver to the first surface, the second surface being connected to the second terminal of the generator/receiver, and at least one second electroconductive wire or ribbon connecting said two surfaces. The antenna is characterized in that the first surface comprises a blank, or a series of blanks, each blank optionally consisting of mutually extending sections. Said blank(s) extend in the vicinity of and along part of the edge of the first surface 2 which is broad enough for the blank(s) to define an inner area of the first surface by substantially forming a majority of the periphery of this area, thereby obtaining a multi-frequency wire-plate operation.

Abstract: A device for electromagnetic characterization of a tested structure elevates, on a predetermined frequency band, distribution parameters of the structure and parameters characteristic of the spurious rays of the structure. The device includes an electric signal generator and an analyzer for analyzing the signal transmitted by the generator and signals reflected by the structure and signals transmitted by the structure. In addition, the electric signal generator is a pulsed signal generator whereof the spectrum is at least as broad as the predetermined frequency band, and the analyzer includes a filter for temporal filtering of the signals it receives, to eliminate spurious signals.

Abstract: This application discloses triphenyl carbenium NCA's as catalyst activators for a class of asymmetrically bridged hafnocene catalyst precursors. These catalyst precursors are activated into olefin polymerization catalysts and are suitable for gas, solution, and slurry-phase polymerization reactions. The disclosed bridge is methylenyl- or silanylenyl-based and is optionally, alkyl or aryl substituted. The catalytic activity of the disclosed hafnocene catalyst precursors is substantially enhanced over identical catalysts that are activated with other activators.

Abstract: The invention provides an antenna characterized in that it comprises a generator and at least two metal surfaces that are mutually parallel and substantially superposed;

Abstract: The invention concerns a method for protecting metal products against corrosion, characterised in that it consists in applying directly on the metal products, that is without prior treatment, a composition consisting at least of a film-forming binder, at least a corrosion inhibiting additive reactive with metal and at least an oligomer additive bearing phosphonic acids. The inventive composition is characterised in that it comprises a film-forming binder, at least a corrosion inhibiting additive reactive with metal and at least an oligomer additive bearing phosphonic acids.

Abstract: The invention concerns a device for electromagnetic characterisation of a tested structure (2), by evaluating, on a predetermined frequency band, distribution parameters of said structure (2) and parameters characteristic of the spurious rays of said structure (2), comprising an electric signal generator (4), means (8) for transmitting said electric signal to the tested structure (2), means (6) for analysing the signal transmitted by the generator (4) and signals reflected by the structure (2) and signals transmitted by the structure (2), the analysing means (6) comprising means for calculating said parameters. In addition, the electric signal generator (4) is a pulsed signal generator whereof the spectrum is at least as broad as said predetermined frequency band, and the analysing means (6) comprise means for temporal filtering of the signals it receives, to eliminate spurious signals.

Abstract: An air diffuser for an air distribution system is disclosed comprising a first and a second border member. Plural spreaders interconnect the first and second border members thereby defining an airflow aperture therebetween. A pattern controller is slidably disposed between the plural spreaders for controlling the volume of airflow through the airflow aperture. The pattern controller is pivotable within the airflow aperture for controlling the direction of airflow through the airflow aperture.

Abstract: This application discloses triphenyl carbenium NCA's as catalyst activators for a class of asymmetrically bridged hafnocene catalyst precursors. These catalyst precursors are activated into olefin polymerization catalysts and are suitable for gas, solution, and slurry-phase polyermization reactions. The disclosed bridge is methylenyl- or silanylenyl-based and is optionally, alkyl or aryl substituted. The catalytic activity of the disclosed hafnocene catalyst precursors is substantially enhanced over identical catalysts that are activated with other activators.

Abstract: An antenna includes a probe capable of transforming electrical energy into electromagnetic energy and inversely. It further includes an assembly of elements made of at least two materials different in permittivity and/or permeability and/or conductivity within which the probe is arranged, the arrangement of the elements in the assembly ensuring radiation and spatial and frequency filtering of the electromagnetic waves produced or received by the probe, which filtering allows in particular one or several operating frequencies (f) of the antenna inside a frequency band gap (B).

Abstract: This application discloses triphenyl carbenium NCA's as catalyst activators for a class of asymmetrically bridged hafnocene catalyst precursors. These catalsyst precursors are activated into olefin polymerization catalysts and are suitable for gas, solution, and slurry-phase polymerization reactions. The disclosed bridge is methylenyl- or silanylenyl-based and is optionally, alkyl or aryl substituted. The catalytic activity of the disclosed hafnocene catalyt precursors is substantially enhanced over identical catalysts that are activated with other activators.

Abstract: This application discloses triphenyl carbenium NCA's as catalyst activators for a class of asymmetrically bridged hafnocene catalyst precursors. These catalyst precursors are activated into olefin polymerization catalysts and are suitable for gas, solution, and slurry-phase polymerization reactions. The disclosed bridge is methylenyl- or silanylenyl-based and is optionally, alkyl or aryl substituted. The catalytic activity of the disclosed hafnocene catalyst precursors is substantially enhanced over identical catalysts that are activated with other activators.

Abstract: An improved air diffuser for an air distribution system is disclosed comprising a first and a second border member. Plural spreaders interconnect the first and second border members thereby defining an airflow aperture therebetween. A pattern controller is slidably disposed between the plural spreaders for controlling the volume of airflow through the airflow aperture. The pattern controller is pivotable within the airflow aperture for controlling the direction of airflow through the airflow aperture.

Abstract: This application discloses triphenyl carbenium NCA's as catalyst activators for a class of asymmetrically bridged hafnocene catalyst precursors. These catalsyst precursors are activated into olefin polymerization catalysts and are suitable for gas, solution, and slurry-phase polymerization reactions. The disclosed bridge is methylenyl- or silanylenyl-based and is optionally, alkyl or aryl substituted. The catalytic activity of the disclosed hafnocene catalyt precursors is substantially enhanced over identical catalysts that are activated with other activators.

Abstract: An air diffuser for an air distribution system comprising a first and a second border member. Plural spreaders interconnect the first and second border members thereby defining an airflow aperture therebetween. A pattern controller is slidably disposed between the plural spreaders for controlling the volume of airflow through the airflow aperture. The pattern controller is pivotable within the airflow aperture for controlling the direction of airflow through the airflow aperture.

Abstract: Copolymers, and processes to make them, are provided which are derived from monomers comprising: a) one mono-olefin having a single Ziegler-Natta polymerizable bond; b) a second monomer having at least one Ziegler-Natta polymerizable bond; c) a third monomer having at least two Ziegler-Natta polymerizable bonds such monomer being: i) straight-chained and of less than six or at least seven carbon atoms; ii) other than straight chained; or iii) combinations thereof, such copolymer having: c) at least about one carbon-carbon unsaturated bond per number average molecule; d) viscous energy of activation (Ea) at least 1 kcal/mol greater than a copolymer having a linear backbone derived from same monomers, but excluding species having at least two Ziegler-Natta polymerizable bonds; e) crystallinity level of about 10% to about 50%; and f) Mz/Mw at least about 1.7. Such copolymers show enhanced melt processability and other attributes during end-product fabrication.

Abstract: An antenna of the type comprising a first electrically conductive surface (12), a second electrically conductive surface (14) forming a ground plane parallel to the first electrically conductive surface, and a first electrically conductive feed wire or strip (16) is provided. The first electrically conductive feed wire or strip (16) links a first terminal of a generator/receiver (20) to the first electrically conductive surface (12). A second electrically conductive feed wire or strip (17) links a second terminal of a generator/receiver (20) to the second electrically conductive surface (14). At least one electrically conductive wire or strip (18, 19) links the first electrically conductive surface (12) and the second electrically conductive surface (14). The first electrically conductive surface, the second electrically conductive surface, and the at least one electrically conductive wire or strip (18, 19) linking the first and second electrically conductive surfaces (12, 14) are all coplanar.