FR2573984A1 - Filter for systems of pipes conveying blood - Google Patents
Filter for systems of pipes conveying blood Download PDFInfo
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- FR2573984A1 FR2573984A1 FR8516452A FR8516452A FR2573984A1 FR 2573984 A1 FR2573984 A1 FR 2573984A1 FR 8516452 A FR8516452 A FR 8516452A FR 8516452 A FR8516452 A FR 8516452A FR 2573984 A1 FR2573984 A1 FR 2573984A1
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- Prior art keywords
- housing
- filter
- membrane
- groove
- filter according
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/087—Single membrane modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
- B29C66/12821—Stepped joint cross-sections comprising at least one overlap joint-segment comprising at least two overlap joint-segments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1286—Stepped joint cross-sections comprising at least one bevelled joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5342—Joining single elements to open ends of tubular or hollow articles or to the ends of bars a substantially flat extra element being placed between and clamped by the joined single elements and the end of said tubular or hollow articles
- B29C66/53425—Joining single elements to open ends of tubular or hollow articles or to the ends of bars a substantially flat extra element being placed between and clamped by the joined single elements and the end of said tubular or hollow articles said substantially flat extra element being perforated, e.g. a screen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- External Artificial Organs (AREA)
Abstract
Description
L'invention concerne un filtre pour des systèmes de canalisations véhiculant du sang, comportant un boîtier de filtre en deux parties séparé en deux chambres par une membrane filtrante et dont les parties sont soudées ensemble le long d'un bord périphérique. The invention relates to a filter for blood-carrying piping systems, comprising a two-part filter housing separated into two chambers by a filter membrane and the parts of which are welded together along a peripheral edge.
Des filtres de ce genre sont utilisés par exemple comme filtre de protection du manomètre ou comme filtre d'infusion. Ils comportent une membrane filtrante qui empeche des particules de substance solide ou des germes de pénétrer dans le système de tubes véhiculant le sang. La membrane filtrante devrait être en mesure de retenir des particules supérieures à 0,3 rm. Des filtres de protection du manomètre ont pour fonction de transmettre vers un manomètre de manière sure et si possible sans retard par une colonne d'air la pression sanguine (pression artérielle ou pression veineuse de retour) existant dans le tube, et en cas de fuites éventuelles, dlem- pecher par une imprégnation de sang le sang d'atteindre le ma nometre. De plus, un filtre de protection du manomètre doit apporter la garantie qu'aucune migration retour de germes ne peut intervenir à partir du manomètre vers le système de tubes. Des filtres d'infusion sont branchés soit sur la seringue d'une pompe d'injection ou un système de transfert à infusion. Filters of this kind are used, for example, as a pressure gauge protection filter or as an infusion filter. They have a filter membrane that prevents particles of solid substance or germs from entering the system of tubes carrying blood. The filter membrane should be able to retain particles larger than 0.3 rm. Pressure gauge protection filters have the function of transmitting to a pressure gauge safely and if possible without delay by an air column the blood pressure (arterial pressure or return venous pressure) existing in the tube, and in the event of leaks possible, to impregnate with blood the blood to reach my name. In addition, a pressure gauge protection filter must guarantee that no return migration of germs can occur from the pressure gauge to the tube system. Infusion filters are connected either to the syringe of an injection pump or to an infusion transfer system.
Les filtres du type connu comportent un boîtier en deux parties qui sont assemblées par soudage. En utilisant le procédé~de soudage aux ultrasons, des particules peuvent se former qui se déposent sur la membrane filtrante et sont entraînées lorsque la membrane est imprégnée ou traversée par un fluide. D'autre part, le procédé de soudage aux ultrasons offre l'avantage de réaliser de bonnes soudures durables résistant notamment aux hautes pressions. Filters of the known type comprise a housing in two parts which are assembled by welding. By using the ~ ultrasonic welding process, particles can form which deposit on the filter membrane and are entrained when the membrane is impregnated or traversed by a fluid. On the other hand, the ultrasonic welding process offers the advantage of producing good durable welds resistant in particular to high pressures.
L'invention a pour objet de créer un filtre du type indiqué précédemment sur lequel aucune particule de soudure ne peut se déposer sur la membrane filtrante et de ce fait parvenir jusqu'au patient. The object of the invention is to create a filter of the type indicated above on which no solder particles can be deposited on the filter membrane and thereby reach the patient.
L'invention permet de réaliser cet objectif par le fait que la membrane du filtre est coincée entre deux faces de serrage des deux parties du boîtier, que la première partie du boîtier comporte à l'extérieur de la face de serrage associée un bourrelet faisant saillie au-dessus de la membrane du filtre, qui pénètre dans une rainure ménagée sur la deuxième partie du boîtier; et que la zone de soudure se trouve radialement à l'extérieur de la rainure et du bourrelet. The invention makes it possible to achieve this objective by the fact that the membrane of the filter is wedged between two tightening faces of the two parts of the housing, that the first part of the housing comprises outside the associated tightening face a protruding bead above the filter membrane, which penetrates into a groove made on the second part of the housing; and that the weld zone is located radially outside the groove and the bead.
Le bourrelet circulaire qui pénètre dans la rainure circulaire, forme, vu en coupe, une sorte de fermeture à labyrinthe qui sépare la zone de soudure de la zone de serrage de la membrane du filtre. La fermeture à labyrinthe empêche des particules de matière susceptibles de se former au cours du soudage, de parvenir jusqu'à la membrane du filtre. The circular bead which penetrates into the circular groove, forms, seen in section, a sort of labyrinth closure which separates the welding zone from the clamping zone of the filter membrane. The labyrinth closure prevents particles of material which may form during welding from reaching the membrane of the filter.
De plus, les faces de serrage. enserrant la membrane du filtre constituent une autre barrière qui empêche des particules de ce genre de se déposer sur la membrane du filtre à l'inté- rieur du boîtier. Les deux parties du boîtier de filtre peuvent être soudées ensemble de manière sure et durable à l'aide du procédé aux ultrasons, la zone soudée étant séparée de la membrane filtrante par un intervalle curviligne étroit. De ce fait, des particules qui se forment au cours de l'opéiation de plastification du soudage aux ultrasons, ne peuvent pas émigrer vers la surface active du filtre. Par ailleurs, le bord du flan du filtre est rendu absolument étanche contre le passage du sang ou de liquides d'infusion par enserrement entre les faces de serrage.Il est possible d'utiliser dans le meme boîtier des membranes de filtre ayant différentes épaisseurs ou constituées de matériaux différents. Un large éventail d'utilisation s'offre ainsi au boîtier de filtre.In addition, the clamping faces. enclosing the filter membrane is another barrier preventing particles of this kind from settling on the filter membrane inside the housing. The two parts of the filter housing can be welded together in a safe and durable manner using the ultrasonic process, the welded area being separated from the filter membrane by a narrow curvilinear gap. As a result, particles that form during the plasticization process of ultrasonic welding cannot migrate to the active surface of the filter. In addition, the edge of the filter blank is completely sealed against the passage of blood or infusion liquids by clamping between the clamping faces. It is possible to use in the same housing filter membranes having different thicknesses or made of different materials. The filter housing therefore has a wide range of uses.
Le bord de la membrane filtrante pénètre de prefe- rence dans une partie de la rainure qui n'est pas remplie par le bourrelet. A cet égard la rainure ne sert pas uniquement à créer un passage tortueux entre la zone de soudure et la zone de serrage, mais elle met en outre à disposition une cavité pour recevoir la partie du bord de la membrane filtrante située à l'extérieur de la zone de serrage. Une surface déflec teur pourra etre prévue pour le bord de la membrane du filtre au pied du côté intérieur du bourrelet. En raison de cette surface déflecteur la membrane du filtre est recourbée immédiatement derrière la zone de serrage, ce qui lui confère un maintien solide, et elle ne pourra pas non plus s'échapper de la zone de serrage en cas de pressions élevées. The edge of the filter membrane preferably enters a part of the groove which is not filled by the bead. In this respect, the groove is not only used to create a tortuous passage between the weld zone and the clamping zone, but it also makes available a cavity to receive the part of the edge of the filter membrane located outside of the clamping area. A deflector surface may be provided for the edge of the filter membrane at the bottom of the inner side of the bead. Due to this deflecting surface, the filter membrane is curved immediately behind the clamping zone, which gives it a solid hold, and it will also not be able to escape from the clamping zone under high pressures.
Selon un mode de réalisation préférentiel de l'invention la première partie du boîtier est entourée par un collet circulaire de la deuxième partie du boîtier et la zone de soudure s'étend radialement entre la rainure et le collet circulaire. Dans ce cas la zone de soudure se trouvera l'in rieur de l'espace entouré par le collet circulaire. Des particules de soudure qui voudraient émigrer de la zone de soudure jusqu'à la membrane du filtre, devraient traverser au moins deux points de déviation et se trouveraient encore là à l'exterieur de la zone de serrage qu'elles ne pourraient en aucun cas surmonter. According to a preferred embodiment of the invention, the first part of the housing is surrounded by a circular collar of the second part of the housing and the weld zone extends radially between the groove and the circular collar. In this case the weld zone will be inside the space surrounded by the circular collar. Weld particles which would like to migrate from the weld zone to the filter membrane, should pass through at least two deflection points and would still be there outside the clamping zone which they could in no case overcome.
A cet effet, la zone de soudure, rapportée à la membrane du filtre, se trouve décalée par rapport à la première partie du boîtier. De ce fait, la voie étroite entre la zone de soudure et la zone de serrage est encore prolongée. To this end, the weld zone, attached to the membrane of the filter, is offset from the first part of the housing. As a result, the narrow path between the weld zone and the clamping zone is further extended.
Une nervure en saillie de l'une des parties du boi- tier peut s'engager au niveau de la soudure dans un conduit approprié de l'autre partie du boîtier. Il en résulte une liaison de forme et par adhérence entre les deux parties du boî- tier au niveau de la soudure. A protruding rib from one part of the housing can engage at the weld in a suitable conduit from the other part of the housing. This results in a form and adhesion connection between the two parts of the housing at the weld.
Les filtres du type connu ont sans exception des boîtiers circulaires ronds. Cette forme a pour inconvénient que les doigts de l'opérateur glissent légèrement en branchant le filtre sur une seringue ou un moniteur de dialyse. Le boî- tier du filtre selon l'invention a un contour rectangulaire avec des bords latéraux bombés. Cela constitue un avantage pendant la manipulation car un glissement n'est plus aussi aisé. Filters of the known type without exception have round circular housings. This form has the disadvantage that the operator's fingers slide slightly when plugging the filter into a syringe or dialysis monitor. The filter housing according to the invention has a rectangular outline with rounded side edges. This is an advantage during handling because sliding is no longer as easy.
Sur les filtres de protection de manomètre selon l'état de la technique la partie inférieure du boîtier est soit de forme conique ou plate. En revanche, la première par tie du boîtier selon l'invention est pour l'essentiel de forme semi sphérique. Cette partie sphérique du boîtier retarde le déclenchement de l'alarme en cas de montée du sang en raison de sa chambre avant relativement grande et se laisse de nouveau libérer sans restriction du sang qui s'est introduit. De plus, la résistance à la-pression plus élevée a méliore la tenue à la pression d'éclatement. On the pressure gauge protection filters according to the prior art the lower part of the housing is either conical or flat. On the other hand, the first part of the housing according to the invention is essentially of semi-spherical shape. This spherical part of the housing delays the triggering of the alarm in the event of an increase in blood due to its relatively large front chamber and can be released again without restriction from the blood which has entered. In addition, the higher pressure resistance has improved the burst pressure resistance.
Selon un autre mode de réalisation de 11 invention la première partie du boîtier a la forme d'une coupe plate. According to another embodiment of the invention, the first part of the housing has the form of a flat section.
Cette realisation en variante convient particulièrement pour des filtres d'infusion pour assurer un faible volume mort du filtre. This alternative embodiment is particularly suitable for infusion filters to ensure a low dead volume of the filter.
L'invention sera décrite en détail ci-après à l'aide d'exemples de réalisation en se référant aux plans sur lesquels
la figure 1 est une vue latérale partiellement en coupe d'un filtre de protection de manomètre,
la figure 2 est une vue de dessus du filtre selon la figure 1,
la figure 3 est une coupe montrant à une échelle agrandie l'assemblage du bord des deux parties du boîtier, et
la figure 4 est une vue latérale dtun filtre d'infusion, partiellement en coupe.The invention will be described in detail below with the aid of exemplary embodiments with reference to the plans on which
FIG. 1 is a side view partially in section of a pressure gauge protection filter,
FIG. 2 is a top view of the filter according to FIG. 1,
FIG. 3 is a section showing on an enlarged scale the assembly of the edge of the two parts of the housing, and
Figure 4 is a side view of an infusion filter, partially in section.
Le filtre représenté sur la figure 1 comporte un boîtier 10 avec une partie, inférieure 11 et une partie supérieure 12. La partie inférieure 11 du boîtier est essentiellement de forme semi sphérique et -comprend un raccord 13 pour le branchement d'un tuyau -(non représenté). La partie supérieure 12 du boîtier comprend une tubulure de raccordement 14 munie d'un filetage. The filter shown in FIG. 1 comprises a housing 10 with a lower part 11 and an upper part 12. The lower part 11 of the housing is essentially of semi-spherical shape and includes a connector 13 for the connection of a pipe - ( not shown). The upper part 12 of the housing comprises a connecting pipe 14 provided with a thread.
Une membrane de filtre 15 séparant l'espace intérieur du boîtier en deux chambres 16 et 17, est serrée entre les deux parties 11, 12 du boîtier. La chambre 17 forme un logement de réception du sang, dans lequel une certaine quantité de sang peut s'accumuler, sans imprégner la membrane 15. A filter membrane 15 separating the interior space of the housing into two chambers 16 and 17 is clamped between the two parts 11, 12 of the housing. The chamber 17 forms a housing for receiving the blood, in which a certain quantity of blood can accumulate, without impregnating the membrane 15.
La tubulure 14 qui est en communication avec la chambre 16, est branchée sur un manomètre, un moniteur ou analogue. The tubing 14 which is in communication with the chamber 16, is connected to a pressure gauge, a monitor or the like.
Ainsi qu'il ressort de la figure 2, le boîtier 10 vu de dessus, n'est pas rond mais de forme sensiblement carrée avec des bords latéraux bombés 18. Il s'agit de la forme extérieure de la partie supérieure 12 du boîtier. Les bourrelets, rainures ou analogues se trouvant dans la zone de liaison des deux parties 11, 12 du boîtier, qui seront encore décrits ci-après, peuvent être de forme circulaire. As shown in Figure 2, the housing 10 seen from above, is not round but of substantially square shape with curved side edges 18. It is the external shape of the upper part 12 of the housing. The beads, grooves or the like located in the connection zone of the two parts 11, 12 of the housing, which will be described further below, may be of circular shape.
Comme indiqué sur la figure 3, le bord de la membrane 15 est enserré entre deux faces de serrage 19a, 19b des parties 11, 12 du boîtier. Les faces de serrage 19a, 19b sont parallèles à la partie active de la surface de la membrane 15 séparant les deux chambres 16 et 17 l'une de l'autre. La face de serrage 19b forme la face frontale d'un épaulement annulaire 20 s'étendant axialement en saillie à partir de la paroi supérieure 21 de la deuxième partie 12 du bottier. As shown in Figure 3, the edge of the membrane 15 is sandwiched between two clamping faces 19a, 19b of the parts 11, 12 of the housing. The clamping faces 19a, 19b are parallel to the active part of the surface of the membrane 15 separating the two chambers 16 and 17 from one another. The clamping face 19b forms the front face of an annular shoulder 20 extending axially projecting from the upper wall 21 of the second part 12 of the shoemaker.
La première partie 11 du boîtier comporte un bourrelet 22 en saillie qui se raccorde à la surface de serrage 19a et dont le côté intérieur forme au niveau du pied une face de déviation 23 sensiblement perpendiculaire à la face de serrage l9a et qui repousse vers le haut, autour du côté extérieur de l'épaulement annulaire 20, le bord de la membrane filtrante 15. Le bourrelet 22 pénètre à l'intérieur de la gorge circulaire 24 de la deuxième partie 12 du boîtier sans toutefois remplir entièrement cette gorge. La paroi 25 qui fait suite à la face de déviation 23, est chanfreinée, de fa çon à former, à l'intérieur de la gorge 24, un espace destiné à recevoir le bord de la membrane filtrante 15. The first part 11 of the housing has a protruding bead 22 which is connected to the clamping surface 19a and whose inner side forms at the foot a deflection face 23 substantially perpendicular to the clamping face l9a and which pushes upwards. , around the outside of the annular shoulder 20, the edge of the filter membrane 15. The bead 22 penetrates inside the circular groove 24 of the second part 12 of the housing without however completely filling this groove. The wall 25 which follows the deflection face 23 is chamfered so as to form, inside the groove 24, a space intended to receive the edge of the filter membrane 15.
La zone de soudure 26 est écartée radialement à l'extérieur de la rainure 24 à laquelle elle est raccordée. The weld zone 26 is spaced radially outside the groove 24 to which it is connected.
Dans la région de la soudure 26, une nervure 27, s'étendant axialement en saillie sur la deuxième partie 12 du boîtier, s'engage dans une rainure correspondante 28 de la première partie 11 du boîtier. Les parois de la nervure 27 sont reliées de façon intégrale à celles de la rainure 28 par soudage aux ultrasons. La zone de soudure 26 est placée à un niveau inférieur à celui de la membrane 15, c'est-à-dire que, au niveau de la membrane, elle est montée décalée par rapport à la pre mière partie 11 du boîtier. Cela signifie que la joue extérieure de la gorge 24 est plus longue que la joue intérieure autour de laquelle la membrane 15 du filtre est repliée.In the region of the weld 26, a rib 27, extending axially projecting from the second part 12 of the housing, engages in a corresponding groove 28 in the first part 11 of the housing. The walls of the rib 27 are integrally connected to those of the groove 28 by ultrasonic welding. The weld zone 26 is placed at a level lower than that of the membrane 15, that is to say that, at the level of the membrane, it is mounted offset with respect to the first part 11 of the housing. This means that the outer cheek of the groove 24 is longer than the inner cheek around which the membrane 15 of the filter is folded.
Le bourrelet 22 n'est pas en contact avec les parois de la gorge 24, de sorte que les positions relatives des deux parties 11 et 12 du boîtier sont tout d'abord exclusivement déterminées par la nervure 27 et la rainure 28. Une plastification de la matière synthétique des deux parties du boîtier intervient au niveau de la soudure 26 pendant le soudage aux ultrasons, tandis que les parties du boîtier sont appli quées axialement l'une contre l'autre. Dans ce cas, l'arrangement mutuel dans l'espace est déterminé par l'écart des faces de serrage 19a et 19b existant lorsque la membrane 15 du filtre est comprimée de la manière indiquée. Le centrage radial de la deuxième partie 12 du boîtier est réalisé par la face de déviation 23 de la première partie du boîtier. Un canal circulaire étroit 29 existe donc entre le bourrelet 23 et la paroi de la rainure 24.Ce canal annulaire 29 est assez étroit et de plus courbé, pour que les particules de matière qui ont été libérées au niveau de la soudure 26 pendant le soudage aux ultrasons, ne peuvent pas, ou que difficilement, le traverser. De plus, de telles particules devraient cheminer en montant dans le canal annulaire étroit 29 pour atteindre la cavité 24. The bead 22 is not in contact with the walls of the groove 24, so that the relative positions of the two parts 11 and 12 of the housing are first of all exclusively determined by the rib 27 and the groove 28. A plasticization of the synthetic material of the two parts of the housing intervenes at the weld 26 during ultrasonic welding, while the parts of the housing are applied axially against one another. In this case, the mutual arrangement in space is determined by the distance of the clamping faces 19a and 19b existing when the membrane 15 of the filter is compressed in the manner indicated. The radial centering of the second part 12 of the housing is achieved by the deflection face 23 of the first part of the housing. A narrow circular channel 29 therefore exists between the bead 23 and the wall of the groove 24. This annular channel 29 is sufficiently narrow and more curved, so that the particles of material which have been released at the weld 26 during welding cannot, or only with difficulty, pass through it. In addition, such particles should travel upward through the narrow annular channel 29 to reach the cavity 24.
La deuxième partie 12 du boîtier est munie d'un épaulement annulaire 30 s'étendant vers le bas au-delà de la zone de- soudure 26 et entourant latéralement la tête de la deuxième partie 11 du boîtier. Une fente annulaire étroite 31 qui autorise de faibles déplacements radiaux des parties 11 et 12 du boîtier pendant le soudage, se trouve entre l'épaulement annulaire 30 et cette te te. The second part 12 of the housing is provided with an annular shoulder 30 extending downwards beyond the weld zone 26 and laterally surrounding the head of the second part 11 of the housing. A narrow annular slot 31 which allows small radial displacements of the parts 11 and 12 of the housing during welding, is located between the annular shoulder 30 and this te te.
Selon la figure 3 la nervure 27 et la rainure 28 qui s'emboîtent l'une dans l'autre, sont disposées au niveau de la soudure 26. Toutefois, il n'est pas absolument nécessaire de prévoir dans la zone de soudure deux surfaces dont les contours s'adaptent l'un à l'autre. Au contraire, les parties 11 et 12 pourraient également s'appuyer l'une sur l'autre, dans la zone de soudure, par des surfaces d'appui parallèles à la membrane 15 du filtre. According to Figure 3 the rib 27 and the groove 28 which fit one into the other, are arranged at the weld 26. However, it is not absolutely necessary to provide in the weld zone two surfaces whose contours adapt to each other. On the contrary, the parts 11 and 12 could also bear one on the other, in the weld zone, by bearing surfaces parallel to the membrane 15 of the filter.
Tandis que les figures 1 à 3 représentent un filtre de protection du manomètre dont la chambre 17 a un volume relativement important, la figure 4 montre un filtre d'infusion dans lequel la première partie 111 du boîtier n'a pas la forme d'un réservoir semi-sphérique mais d'une coupe aplatie pour réduire, si possible, au minimum le volume de la chambre 17. Les deux parties 11' et 12 du boîtier sont assemblées de manière identique à celle décrite en se référant à la figure 3. While FIGS. 1 to 3 represent a filter for protecting the pressure gauge, the chamber 17 of which has a relatively large volume, FIG. 4 shows an infusion filter in which the first part 111 of the housing does not have the form of a semi-spherical tank but with a flattened section to reduce, if possible, the volume of the chamber 17 to a minimum. The two parts 11 ′ and 12 of the housing are assembled in an identical manner to that described with reference to FIG. 3.
Claims (9)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19848435227U DE8435227U1 (en) | 1984-12-01 | 1984-12-01 | FILTERS FOR BLOOD-CONDUCTING LINE SYSTEMS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2573984A1 true FR2573984A1 (en) | 1986-06-06 |
Family
ID=6773281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8516452A Withdrawn FR2573984A1 (en) | 1984-12-01 | 1985-11-06 | Filter for systems of pipes conveying blood |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE8435227U1 (en) |
| FR (1) | FR2573984A1 (en) |
| IT (2) | IT1200807B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0364173A1 (en) * | 1988-10-10 | 1990-04-18 | Alcan International Limited | Microfilter device |
| FR2647512A1 (en) * | 1989-05-24 | 1990-11-30 | Henri Prigent | Method and support for crimping an elastically deformable surface under tension |
| EP0563581A1 (en) * | 1992-02-28 | 1993-10-06 | Millipore Corporation | Filtration apparatus having stress relief groove |
| EP0705131A1 (en) * | 1993-06-24 | 1996-04-10 | Porous Media Corporation | Box filter |
| EP0933190A1 (en) * | 1998-02-03 | 1999-08-04 | WILDEN Engineering- und Vertriebsgesellschaft mbH | Method and apparatus for integrating an element between an upper part and a lower part making use of ultrasonic welding and corresponding arrangement |
| EP1683566A1 (en) * | 2003-10-17 | 2006-07-26 | Fuji Photo Film Co., Ltd. | Porous film cartridge |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10141817B4 (en) | 2001-08-27 | 2005-03-03 | Eppendorf Ag | Membrane device for receiving samples and method for producing a device |
| DE10206261B4 (en) * | 2002-02-15 | 2013-01-17 | Sartorius Stedim Biotech Gmbh | Filter unit with a laser beam welding connection and method for its production |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD12077U (en) * | ||||
| DE2110751A1 (en) * | 1970-03-19 | 1971-10-07 | Gen Electric | Filter holder |
| DE2222004A1 (en) * | 1972-05-05 | 1973-11-15 | Weppler Ohg | THROUGH FILTER |
| FR2345196A1 (en) * | 1976-03-25 | 1977-10-21 | Baxter Travenol Lab | BLOOD FILTER IMPROVEMENTS |
| DE8132447U1 (en) * | 1980-11-10 | 1982-03-11 | Gelman Sciences, Inc., 48106 Ann Arbor, Mich. | "FILTER" |
-
1984
- 1984-12-01 DE DE19848435227U patent/DE8435227U1/en not_active Expired
-
1985
- 1985-10-21 IT IT22565/85A patent/IT1200807B/en active
- 1985-10-21 IT IT8523483U patent/IT8523483V0/en unknown
- 1985-11-06 FR FR8516452A patent/FR2573984A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD12077U (en) * | ||||
| DE2110751A1 (en) * | 1970-03-19 | 1971-10-07 | Gen Electric | Filter holder |
| DE2222004A1 (en) * | 1972-05-05 | 1973-11-15 | Weppler Ohg | THROUGH FILTER |
| FR2345196A1 (en) * | 1976-03-25 | 1977-10-21 | Baxter Travenol Lab | BLOOD FILTER IMPROVEMENTS |
| DE8132447U1 (en) * | 1980-11-10 | 1982-03-11 | Gelman Sciences, Inc., 48106 Ann Arbor, Mich. | "FILTER" |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0364173A1 (en) * | 1988-10-10 | 1990-04-18 | Alcan International Limited | Microfilter device |
| FR2647512A1 (en) * | 1989-05-24 | 1990-11-30 | Henri Prigent | Method and support for crimping an elastically deformable surface under tension |
| EP0563581A1 (en) * | 1992-02-28 | 1993-10-06 | Millipore Corporation | Filtration apparatus having stress relief groove |
| EP0705131A1 (en) * | 1993-06-24 | 1996-04-10 | Porous Media Corporation | Box filter |
| EP0705131A4 (en) * | 1993-06-24 | 1997-11-05 | Porous Media Corp | Box filter |
| EP0933190A1 (en) * | 1998-02-03 | 1999-08-04 | WILDEN Engineering- und Vertriebsgesellschaft mbH | Method and apparatus for integrating an element between an upper part and a lower part making use of ultrasonic welding and corresponding arrangement |
| EP1683566A1 (en) * | 2003-10-17 | 2006-07-26 | Fuji Photo Film Co., Ltd. | Porous film cartridge |
| EP1683566A4 (en) * | 2003-10-17 | 2008-09-24 | Fujifilm Corp | Porous film cartridge |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1200807B (en) | 1989-01-27 |
| IT8522565A0 (en) | 1985-10-21 |
| DE8435227U1 (en) | 1985-02-28 |
| IT8523483V0 (en) | 1985-10-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE | Withdrawal of published application |