摘要:
The present invention concerns an endodontic instrument (10) for preparing a tooth of a patient, in particular an instrument for cleaning the root canal that follows the natural geometry of said canal. The instrument (10) comprises a rigid tip (11) arranged to be mounted on a rotating support (102) of an apparatus (103) called a contra-angle, and a working sector (12). Said working sector (12) comprises a free end section (13), and is arranged to be engaged in said root canal (101). The working sector (12) consists of a first substantially straight active segment (14), disposed in the extension of said rigid tip (11), and at least one second active segment (15) comprising said free end section (13). In the static state, said second active segment (15) is substantially straight and in said dynamic state said second active segment (15) has a curved shape.
摘要:
The invention relates to a calcium hydroxide-based construction material in which the main component is calcium hydroxide, referred to as "hydrated lime", which is mixed with an organic and/or inorganic filler in order to produce a structural mass consisting of said basic component and said filler. A predetermined volume of water is added to said structural mass, which is calculated on the basis of the volume of said structural mass and is added in order to produce a paste that is workable and capable of hardening. To ensure that the mixture sets, an additive consisting of at least one powder made from volcanic natural materials is added. The filler is advantageously made from substance chips or fibres, preferably plant substances, such as hemp or wood, and the additive is preferably made of pozzolana. There are two alternative methods for providing said material: the main component, the filler and the additive are initially dry-mixed before the water is added, or the main component and the filler are dry-mixed, the water is added and then the additive is added.
摘要:
La présente invention concerne une pièce de bijouterie (10) comportant un support (11) et au moins une pierre de bijouterie (12), constituée par une pierre taillée comportant une partie frontale visible, appelée couronne (120), et une partie dorsale, appelée culasse (122), à l'arrière de ladite couronne (120) et délimitée de ladite couronne (120) par une partie intermédiaire appelée rondiste (123), ladite pierre taillée (12) étant couplée par l'intermédiaire d'au moins quatre plots de fixation (13) audit support (11), ledit support (11) comportant au moins quatre réservations (110) qui délimitent une zone de montage (113) de ladite pierre taillée (12) et sont agencées pour recevoir respectivement une partie inférieure (130) desdits plots de fixation (13), lesdits plots de fixation (13) comportant, une partie supérieure (131) agencée pour maintenir ladite pierre taillée.
摘要:
A method for producing A hydrogen gas from formic acid, characterized in that at least one heterogeneous catalyst is used to transform the formic acid into hydrogen gas. The at least one heterogeneous catalyst contains heterogenized ruthenium. According to a first aspect of the invention, the at least one heterogeneous catalyst contains at least one hydrophilic phosphine ligand which is m-TPPTS (meta-trisulfonated triphenylphosphine). The at least one heterogeneous catalyst is preferably obtained by mixing an aqueous solution of RuCl3 with hydrophilic phosphine, firstly activated by carrying out a homogeneous reaction with formic acid and by adding at least one solid structure.
摘要:
The invention relates to a torque wrench (10) comprising a grasping handle (11) and two heads, respectively (12 and 13), that each have a clamping tool (14 and 15) arranged at the two opposite ends of the torque wrench. Each of the clamping tools (14 and 15) is provided as a rotatable socket (16) engaged in an annular part (17) that is secured to the corresponding head (12, 13). The rotatable socket (16) comprises a central opening (18) defined by a hexagonal faceted wall (19). The invention also comprises a spring element that corresponds to the head (12) and consists of a single spring leaf (22). In a stressed position, the free end of the spring leaf (22) engages the flank (29) of a tooth (21) and locks the rotatable socket (16). Said socket can be freed after the buckling of the spring leaf (22).