EP0577462A1 - Ball screw mounting device ensuring the operation of the closure shelves of a freeze drying chamber - Google Patents

Ball screw mounting device ensuring the operation of the closure shelves of a freeze drying chamber Download PDF

Info

Publication number
EP0577462A1
EP0577462A1 EP93401574A EP93401574A EP0577462A1 EP 0577462 A1 EP0577462 A1 EP 0577462A1 EP 93401574 A EP93401574 A EP 93401574A EP 93401574 A EP93401574 A EP 93401574A EP 0577462 A1 EP0577462 A1 EP 0577462A1
Authority
EP
European Patent Office
Prior art keywords
nut
mounting device
screw
tank
grooves
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93401574A
Other languages
German (de)
French (fr)
Other versions
EP0577462B1 (en
Inventor
Patrick Gallet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Usifroid SA
Original Assignee
Usifroid SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Usifroid SA filed Critical Usifroid SA
Publication of EP0577462A1 publication Critical patent/EP0577462A1/en
Application granted granted Critical
Publication of EP0577462B1 publication Critical patent/EP0577462B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B5/00—Drying solid materials or objects by processes not involving the application of heat
    • F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
    • F26B5/06—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum the process involving freezing

Definitions

  • the invention lies in the technical field of lyophilization tanks and relates more particularly to the special mounting of ball screws intended to operate the corking shelves arranged in said tank.
  • the rings, as well as the bearings, are required to withstand very large forces and it has been found that despite the precautions taken to ensure perfect alignment of the screw in the bearings, wear was noted in particular at the level of the stainless steel rings and friction materials which hardly withstand high pressures. In addition, such a pad support is vulnerable to impurities and waste which can slip between the rings and to stress concentrations due to slight plastic deformations of the tank during the pressure / temperature cycles, rapidly causing their deterioration.
  • a main object of the present invention therefore relates to a device for mounting ball screws ensuring the operation of shelves supporting bottles in a freeze-drying tank, said screws being in abutment at the bottom of the tank, device according to which the lower end of each screw is engaged in a zero pitch nut fitted with parallel and horizontal grooves intended to receive balls which cooperate with grooves provided in the screw, at least one sealing system being provided on either side of the nut to prevent the entry of impurities between the screw and said nut.
  • the lower end of the screw carries a sleeve in which said grooves are provided, and the nut is housed inside two hemispherical cages resting on brackets fixed to the bottom of the tank .
  • openings are provided in the nut for placing the balls in the grooves.
  • the sealing system consists of crowns made of sintered stainless steel, attached to the upper part and to the lower part of the sleeve and of the nut of the closure beam, and maintained by a flexible plastic profile seal.
  • the device presented in FIG. 1 is located inside a freeze-drying tank 1 which contains a plurality of shelves 2 displaced by a plugging beam 3 bearing on at least two ball screws 4 by means of 'nuts 5.
  • the screws extend vertically over the entire height of the tank, on either side of the shelves.
  • the lower end of each screw 4 engages in a nut 6 with zero pitch, that is to say in a nut equipped with parallel and horizontal grooves 7 intended to receive each several balls 8 which are also housed in corresponding cylindrical grooves 9 provided in an end sleeve 10 of said screw.
  • the nut 6 whose external shape is spherical and which can behave like a ball joint in order to guarantee optimal operating conditions of the bearing without parasitic stress, is housed inside two hemispherical cages (11, 12) which rest themselves on brackets 13, the assembly being fixed to the bottom of the tank by a set of screws 14.
  • the sleeve 10 is made integral with the screw 4 by a key 15.
  • a pin 16 provides the connection between nut 6 and the cages (11, 12).
  • openings 17 (only one is shown) allowing the positioning of the balls in the grooves 7.
  • the lower part of the screw 4 and of the sleeve 10 ends in a tightening bolt 18.
  • a ring 19 made of sintered stainless steel is attached to the upper part as well as to the lower part of the sleeve 10, against which it is held by a seal profile 20 in flexible synthetic material.
  • the crowns act as a filter for dust and impurities but can let water vapor and gas pass, which ensures the degassing of the mechanism.
  • the filter 19 disposed in the lower part is located in such a way that there is no possibility of accumulation of condensates which are evacuated naturally by gravity during the steam sterilization phase.
  • each ball screw at the level of the plugging beam, is shown in more detail in FIG. 3.
  • the nut 5 which encloses the ball screw.
  • the nut is made integral with the beam body 3 by a system of keys 22. It will be noted that there remains between the nut and the beam body, a space 23 constituting a small clearance between the screw and the beam. This clearance allows a degree of freedom in translation of one of the movable nuts 5 relative to the stopper beam, to absorb the differential expansion between said beam and the rest of the tank.
  • the nut 6 with zero pitch defined above is, as can be seen, easily interchangeable.
  • the nut is fitted with more or less grooves containing a plurality of balls. It acts as a crapaudine and because of the sealing means with which it is provided, it is much less sensitive to abrasion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)
  • Transmission Devices (AREA)

Abstract

The lower end of each ball screw (4) is engaged in a zero pitch nut (6) equipped with parallel and horizontal throats (7) intended to receive balls (8) which interact with grooves (9) provided in an end sleeve (10) supported by the screw. A sealing system consists of crowns (19) made of sintered stainless steel which are added to the upper part and to the lower part of the sleeve and are held in position by a profiled gasket made of flexible synthetic material. Application to freeze-drying chambers. <IMAGE>

Description

L'invention se situe dans le domaine technique des cuves de lyophilisation et se rapporte plus particulièrement au montage spécial des vis à billes destinées à manoeuvrer les étagères de bouchage disposées dans ladite cuve.The invention lies in the technical field of lyophilization tanks and relates more particularly to the special mounting of ball screws intended to operate the corking shelves arranged in said tank.

Pour éviter que les produits lyophilisés dans une cuve ne soient mis en contact avec l'air ambiant, il est bien connu de procéder au bouchage des flacons contenant les produits en question, à l'intérieur même de l'enceinte de lyophilisation. Pour cela une technique avantageuse consiste à répartir lesdits flacons sur des étagères superposées et à faire en sorte que celles-ci viennent à tour de rôle se mettre en appui sur les flacons portés par l'étagère immédiatement inférieure et enfoncer ainsi leurs bouchons, jusqu'à ce que toutes les étagères se trouvent empilées et que l'ensemble des flacons soient bouchés. On sait que pour éviter les traversées des tiges de vérins de manoeuvre dans la cuve, qui génèrent des risques de pénétration de poussières ou de produits non stériles à l'intérieur, il a été imaginé un mécanisme de manoeuvre de ces étagères qui évite tout risque de contamination. On connaît ainsi par le FR-A 2 655 020 au nom de la Demanderesse un mécanisme de bouchage de flacons répartis sur les étagères d'une cuve de lyophilisation, selon lequel au moins une des étagères est suspendue à une poutre de bouchage disposée horizontalement à l'intérieur et dans la partie supérieure de la cuve, ladite poutre étant déplacée de bas en haut ou de haut en bas par au moins deux vis à billes s'étendant verticalement dans la cuve. Un unique moteur extérieur entraîne les vis en rotation et l'étanchéité est assurée plus aisément à l'aide de manchons porte-joints.To prevent the lyophilized products in a tank from being brought into contact with the ambient air, it is well known to cap the bottles containing the products in question, inside the lyophilization enclosure itself. For this, an advantageous technique consists in distributing said bottles on superimposed shelves and in making sure that these come in turn to bear on the bottles carried by the immediately lower shelf and thus push their caps, until all the shelves are stacked and all the bottles are closed. We know that to avoid crossing the rods of actuating cylinders in the tank, which generate risks of penetration of dust or non-sterile products inside, a mechanism has been devised for operating these shelves which avoids any risk contamination. There is thus known from FR-A 2 655 020 in the name of the Applicant a mechanism for capping vials distributed on the shelves of a freeze-drying tank, according to which at least one of the shelves is suspended from a capping beam arranged horizontally at inside and in the upper part of the tank, said beam being moved from bottom to top or from top to bottom by at least two ball screws extending vertically in the tank. A single external motor drives the screws in rotation and sealing is more easily ensured using seal carrier sleeves.

Ces vis à billes qui supportent le poids de la poutre de bouchage, des étagères et de leur charge, doivent être positionnées de façon très précise et maintenues solidement en appui sur le fond de la cuve. Pour cela, il est habituel jusqu'à présent de fixer à la partie inférieure de chaque vis des bagues en acier inoxydable destinées à venir en appui contre des coussinets fixes à collerette eux-mêmes portés par au moins deux supports métalliques, ancrés au fond de la cuve. Pour que les bagues, qui tournent avec la vis, glissent avec le moins de frottement possible sur les coussinets fixes, ces derniers sont avantageusement enduits, par exemple d'une poudre de céramique chargée de téflon Ⓡ.These ball screws that support the weight of the closure beam, shelves and their load, must be positioned very precisely and held firmly in abutment on the bottom of the tank. For this, it is usual until now to fix to the lower part of each screw stainless steel rings intended to come into abutment against fixed bearings with flange themselves carried by at least two metal supports, anchored at the bottom of tank. So that the rings, which rotate with the screw, slide with the least possible friction on the fixed bearings, the latter are advantageously coated, for example with a ceramic powder loaded with Teflon Ⓡ.

Les bagues, de même que les coussinets, sont amenés à supporter des efforts très importants et on a constaté que malgré les précautions prises pour assurer un parfait alignement de la vis dans les coussinets, une usure était constatée notamment au niveau des bagues en acier inoxydable et matériaux de friction qui supportent difficilement les fortes pressions. En outre un tel support à coussinets est vulnérable aux impuretés et déchets qui peuvent se glisser entre les bagues et aux concentrations de contraintes dues aux légères déformations plastiques de la cuve lors des cycles de pression/température, entraînant rapidement leur détérioration.The rings, as well as the bearings, are required to withstand very large forces and it has been found that despite the precautions taken to ensure perfect alignment of the screw in the bearings, wear was noted in particular at the level of the stainless steel rings and friction materials which hardly withstand high pressures. In addition, such a pad support is vulnerable to impurities and waste which can slip between the rings and to stress concentrations due to slight plastic deformations of the tank during the pressure / temperature cycles, rapidly causing their deterioration.

Ces anomalies ont conduit la Demanderesse à rechercher un système de montage des vis à billes qui s'affranchit justement des inconvénients précités, mais qui également facilite les opérations de montage, de démontage ou d'entretien.These anomalies have led the Applicant to seek a mounting system for ball screws which precisely overcomes the aforementioned drawbacks, but which also facilitates mounting, dismantling or maintenance operations.

Un objet principal de la présente invention concerne donc un dispositif de montage des vis à billes assurant la manoeuvre d'étagères supportant des flacons dans une cuve de lyophilisation, lesdites vis étant en appui au fond de la cuve, dispositif selon lequel l'extrémité inférieure de chaque vis est engagée dans un écrou à pas nul équipé de gorges parallèles et horizontales destinées à recevoir des billes qui coopèrent avec des rainures prévues dans la vis, au moins un système d'étanchéité étant prévu de part et d'autre de l'écrou pour interdire l'entrée d'impuretés entre la vis et ledit écrou.A main object of the present invention therefore relates to a device for mounting ball screws ensuring the operation of shelves supporting bottles in a freeze-drying tank, said screws being in abutment at the bottom of the tank, device according to which the lower end of each screw is engaged in a zero pitch nut fitted with parallel and horizontal grooves intended to receive balls which cooperate with grooves provided in the screw, at least one sealing system being provided on either side of the nut to prevent the entry of impurities between the screw and said nut.

Selon des caractéristiques particulières de l'invention, l'extrémité inférieure de la vis porte un manchon dans lequel sont prévues lesdites rainures, et l'écrou est logé à l'intérieur de deux cages hémisphériques reposant sur des potences fixées au fond de la cuve. En outre des ouvertures sont prévues dans l'écrou pour la mise en place des billes dans les gorges.According to particular features of the invention, the lower end of the screw carries a sleeve in which said grooves are provided, and the nut is housed inside two hemispherical cages resting on brackets fixed to the bottom of the tank . In addition, openings are provided in the nut for placing the balls in the grooves.

Selon une autre caractéristique principale de l'invention, le système d'étanchéité est constitué de couronnes en acier inoxydable fritté, rapportées à la partie supérieure et à la partie inférieure du manchon et de l'écrou de la poutre de bouchage, et maintenues par un joint profilé en matière synthétique souple.According to another main characteristic of the invention, the sealing system consists of crowns made of sintered stainless steel, attached to the upper part and to the lower part of the sleeve and of the nut of the closure beam, and maintained by a flexible plastic profile seal.

D'autres caractéristiques particulières et avantages de l'invention ressortiront de la description qui va suivre d'une forme de réalisation prise à titre d'exemple non limitatif, et dans laquelle il est fait référence aux dessins annexés qui représentent.

  • Figure 1, une vue schématique en coupe d'une cuve de lyophilisation
  • Figure 2, une vue en coupe à plus grande échelle du montage de la partie inférieure des vis à billes
  • Figure 3, une vue en coupe à plus grande échelle de l'écrou de la poutre de bouchage.
Other particular characteristics and advantages of the invention will emerge from the description which follows of an embodiment taken by way of nonlimiting example, and in which reference is made to the appended drawings which represent.
  • Figure 1, a schematic sectional view of a lyophilization tank
  • Figure 2, a sectional view on a larger scale of the mounting of the lower part of the ball screws
  • Figure 3, a sectional view on a larger scale of the nut of the closure beam.

Le dispositif présenté sur la figure 1 se situe à l'intérieur d'une cuve de lyophilisation 1 qui renferme une pluralité d'étagères 2 déplacées par une poutre de bouchage 3 en appui sur au moins deux vis à billes 4 par l'intermédiaire d'écrous 5. Les vis s'étendent verticalement sur toute la hauteur de la cuve, de part et d'autre des étagères. On voit plus en détail à la figure 2 que l'extrémité inférieure de chaque vis 4 s'engage dans un écrou 6 à pas nul c'est-à-dire dans un écrou équipé de gorges parallèles et horizontales 7 destinées à recevoir chacune plusieurs billes 8 qui sont logées aussi dans des rainures cylindriques correspondantes 9 prévues dans un manchon d'extrémité 10 de ladite vis. L'écrou 6, dont la forme extérieure est sphérique et qui peut se comporter comme une rotule afin de garantir des conditions de fonctionnement du roulement optimales sans contrainte parasite, est logé à l'intérieur de deux cages hémisphériques (11, 12) qui reposent elles-mêmes sur des potences 13, l'ensemble étant fixé au fond de la cuve par un jeu de vis 14. Le manchon 10 est rendu solidaire de la vis 4 par une clavette 15. D'autre part un pion 16 assure la liaison entre l'écrou 6 et les cages (11, 12) . Dans l'écrou sont prévues des ouvertures 17 (une seule est représentée) permettant la mise en place des billes dans les gorges 7. La partie inférieure de la vis 4 et du manchon 10 se termine par un boulon de serrage 18. Pour éviter que des impuretés ne puissent pénétrer dans l'espace annulaire entre l'écrou et le manchon, une couronne 19 en acier inoxydable fritté est rapportée à la partie supérieure ainsi qu'à la partie inférieure du manchon 10, contre lequel elle est maintenue par un joint profilé 20 en matière synthétique souple. Les couronnes servent de filtre aux poussières et impuretés mais peuvent laisser passer la vapeur d'eau et le gaz, ce qui permet d'assurer le dégazage du mécanisme. Le filtre 19 disposé en partie basse est situé de telle manière qu'il n'y a pas de possibilité d'accumulation de condensats qui s'évacuent naturellement par gravité lors de la phase de stérilisation à la vapeur.The device presented in FIG. 1 is located inside a freeze-drying tank 1 which contains a plurality of shelves 2 displaced by a plugging beam 3 bearing on at least two ball screws 4 by means of 'nuts 5. The screws extend vertically over the entire height of the tank, on either side of the shelves. We see in more detail in Figure 2 that the lower end of each screw 4 engages in a nut 6 with zero pitch, that is to say in a nut equipped with parallel and horizontal grooves 7 intended to receive each several balls 8 which are also housed in corresponding cylindrical grooves 9 provided in an end sleeve 10 of said screw. The nut 6, whose external shape is spherical and which can behave like a ball joint in order to guarantee optimal operating conditions of the bearing without parasitic stress, is housed inside two hemispherical cages (11, 12) which rest themselves on brackets 13, the assembly being fixed to the bottom of the tank by a set of screws 14. The sleeve 10 is made integral with the screw 4 by a key 15. On the other hand a pin 16 provides the connection between nut 6 and the cages (11, 12). In the nut are provided openings 17 (only one is shown) allowing the positioning of the balls in the grooves 7. The lower part of the screw 4 and of the sleeve 10 ends in a tightening bolt 18. To avoid that impurities cannot enter the annular space between the nut and the sleeve, a ring 19 made of sintered stainless steel is attached to the upper part as well as to the lower part of the sleeve 10, against which it is held by a seal profile 20 in flexible synthetic material. The crowns act as a filter for dust and impurities but can let water vapor and gas pass, which ensures the degassing of the mechanism. The filter 19 disposed in the lower part is located in such a way that there is no possibility of accumulation of condensates which are evacuated naturally by gravity during the steam sterilization phase.

La partie supérieure de chaque vis à billes, au niveau de la poutre de bouchage, est montrée plus en détail à la figure 3. On y voit l'écrou 5 qui enserre la vis à billes. L'écrou est rendu solidaire du corps de poutre 3 par un système de clavettes 22. On notera qu'il subsiste entre l'écrou et le corps de poutre, un espace 23 constituant un faible jeu entre la vis et la poutre. Ce jeu autorise un degré de liberté en translation de l'un des écrous mobiles 5 par rapport à la poutre de bouchage, permettant d'absorber la dilatation différentielle entre ladite poutre et le reste de la cuve. On retrouve également sur cette figure 3, de part et d'autre de l'écrou 5 par lequel la poutre de bouchage 3 coopère avec la vis à billes 4, une couronne 19 en acier inoxydable fritté maintenue par un joint profilé 21. Le joint, par sa forme adaptée à la gorge hélicoïdale de la vis, permet d'assurer une protection malgré le mouvement relatif des divers constituants.The upper part of each ball screw, at the level of the plugging beam, is shown in more detail in FIG. 3. We see there the nut 5 which encloses the ball screw. The nut is made integral with the beam body 3 by a system of keys 22. It will be noted that there remains between the nut and the beam body, a space 23 constituting a small clearance between the screw and the beam. This clearance allows a degree of freedom in translation of one of the movable nuts 5 relative to the stopper beam, to absorb the differential expansion between said beam and the rest of the tank. Also found in this Figure 3, on either side of the nut 5 by which the plugging beam 3 cooperates with the ball screw 4, a ring 19 of sintered stainless steel held by a profiled seal 21. The seal , by its shape adapted to the helical groove of the screw, ensures protection despite the relative movement of the various constituents.

L'écrou 6 à pas nul défini plus haut est comme on le voit facilement interchangeable. En fonction des dimensions de la cuve et des charges que doivent supporter les vis, l'écrou est équipé de plus ou moins de rainures renfermant une pluralité de billes. Il fait office de crapaudine et du fait des moyens d'étanchéité dont il est pourvu, il est beaucoup moins sensible à l'abrasion.The nut 6 with zero pitch defined above is, as can be seen, easily interchangeable. Depending on the dimensions of the tank and the loads that the screws have to bear, the nut is fitted with more or less grooves containing a plurality of balls. It acts as a crapaudine and because of the sealing means with which it is provided, it is much less sensitive to abrasion.

Claims (9)

Dispositif de montage des vis à billes assurant la manoeuvre d'étagères supportant des flacons dans une cuve de lyophilisation, lesdites vis étant en appui au fond de la cuve caractérisé en ce que l'extrémité inférieure de chaque vis (4) est engagée dans un écrou (6) à pas nul équipé de gorges parallèles et horizontales (7) destinées à recevoir des billes (8) qui coopèrent avec des rainures (9) prévues dans la vis, et en ce que au moins un système d'étanchéité (19, 20) est prévu de part et d'autre de l'écrou pour interdire l'entrée d'impuretés entre la vis et ledit écrou.Device for mounting ball screws ensuring the operation of shelves supporting bottles in a freeze-drying tank, said screws being in abutment at the bottom of the tank, characterized in that the lower end of each screw (4) is engaged in a nut (6) with zero pitch fitted with parallel and horizontal grooves (7) intended to receive balls (8) which cooperate with grooves (9) provided in the screw, and in that at least one sealing system (19 , 20) is provided on either side of the nut to prevent the entry of impurities between the screw and said nut. Dispositif de montage selon la revendication 1 caractérisé en ce que l'extrémité inférieure de la vis (4) porte un manchon (10) dans lequel sont prévues lesdites rainures (9).Mounting device according to claim 1 characterized in that the lower end of the screw (4) carries a sleeve (10) in which said grooves (9) are provided. Dispositif de montage selon la revendication 1 caractérisé en ce que l'écrou (6) est logé à l'intérieur de deux cages hémisphériques (11, 12) reposant sur des potences (13) fixées au fond de la cuve.Mounting device according to claim 1 characterized in that the nut (6) is housed inside two hemispherical cages (11, 12) resting on brackets (13) fixed to the bottom of the tank. Dispositif de montage selon la revendication 2 caractérisé en ce que le manchon (10) est rendu solidaire de la vis (4) par une clavette (15).Mounting device according to claim 2 characterized in that the sleeve (10) is made integral with the screw (4) by a key (15). Dispositif de montage selon la revendication 3 caractérisé en ce que un pion (16) assure la liaison entre l'écrou (6) et les cages (11, 12)Mounting device according to claim 3 characterized in that a pin (16) provides the connection between the nut (6) and the cages (11, 12) Dispositif de montage selon la revendication 1 caractérisé en ce que des ouvertures (17) sont prévues dans l'écrou (6) pour la mi se en place des billes dans les gorges (7).Mounting device according to claim 1 characterized in that openings (17) are provided in the nut (6) for the mid place of the balls in the grooves (7). Dispositif de montage selon les revendications 1 et 2, caractérisé en ce que le système d'étanchéité est constitué de couronnes (19) en acier inoxydable fritté, rapportées à la partie supérieure et à la partie inférieure du manchon (10) et maintenues par un joint profilé (20) en matière synthétique souple.Mounting device according to claims 1 and 2, characterized in that the sealing system consists of rings (19) made of sintered stainless steel, attached to the upper part and to the lower part of the sleeve (10) and held by a profiled seal (20) in flexible synthetic material. Dispositif de montage selon les revendications 1 et 7 caractérisé en ce que ledit système d'étanchéité (19) est monté de part et d'autre de l'écrou (5) de la poutre de bouchage (3).Mounting device according to claims 1 and 7 characterized in that said sealing system (19) is mounted on either side of the nut (5) of the plugging beam (3). Dispositif de montage selon la revendication 8 caractérisé en ce qu'un jeu est prévu entre l'écrou et la poutre de bouchage (3), qui autorise un degré de liberté en translation permettant d'absorber la dilatation différentielle entre ladite poutre et le reste de la cuve, et en ce qu'un joint (21) a une forme adaptée à la gorge hélicoïdale de la vis.Mounting device according to claim 8 characterized in that a clearance is provided between the nut and the plugging beam (3), which allows a degree of freedom in translation allowing to absorb the differential expansion between said beam and the rest of the tank, and in that a seal (21) has a shape adapted to the helical groove of the screw.
EP93401574A 1992-07-02 1993-06-21 Ball screw mounting device ensuring the operation of the closure shelves of a freeze drying chamber Expired - Lifetime EP0577462B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9208147 1992-07-02
FR929208147A FR2693166B1 (en) 1992-07-02 1992-07-02 Device for mounting ball screws ensuring the operation of the corking shelves of a freeze-drying tank.

Publications (2)

Publication Number Publication Date
EP0577462A1 true EP0577462A1 (en) 1994-01-05
EP0577462B1 EP0577462B1 (en) 1997-01-08

Family

ID=9431442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93401574A Expired - Lifetime EP0577462B1 (en) 1992-07-02 1993-06-21 Ball screw mounting device ensuring the operation of the closure shelves of a freeze drying chamber

Country Status (7)

Country Link
US (1) US5423130A (en)
EP (1) EP0577462B1 (en)
JP (1) JPH0754953A (en)
DE (1) DE69307202T2 (en)
DK (1) DK0577462T3 (en)
ES (1) ES2096239T3 (en)
FR (1) FR2693166B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8393796B2 (en) * 2010-07-29 2013-03-12 Ontario Drive & Gear Limited Heavy duty bearing support system for ATV

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173078A (en) * 1978-05-16 1979-11-06 The Virtis Company, Inc. Shelf arrangement for freeze drying apparatus
EP0399884A1 (en) * 1989-05-22 1990-11-28 Pierre Guerin S.A. Plate freezer
FR2655020A1 (en) * 1989-11-30 1991-05-31 Usifroid Mechanism for stoppering bottles in a lyophilisation (freeze-drying) vessel

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191517310A (en) * 1915-12-09 1916-11-23 Edward Sydney Luard Improvements in and relating to Means for Coupling together Shafts and other Parts.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173078A (en) * 1978-05-16 1979-11-06 The Virtis Company, Inc. Shelf arrangement for freeze drying apparatus
EP0399884A1 (en) * 1989-05-22 1990-11-28 Pierre Guerin S.A. Plate freezer
FR2655020A1 (en) * 1989-11-30 1991-05-31 Usifroid Mechanism for stoppering bottles in a lyophilisation (freeze-drying) vessel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GB-A-Q17310 (LUARD ET AL) *

Also Published As

Publication number Publication date
FR2693166A1 (en) 1994-01-07
EP0577462B1 (en) 1997-01-08
US5423130A (en) 1995-06-13
ES2096239T3 (en) 1997-03-01
FR2693166B1 (en) 1994-09-02
DK0577462T3 (en) 1997-06-16
JPH0754953A (en) 1995-02-28
DE69307202D1 (en) 1997-02-20
DE69307202T2 (en) 1997-06-05

Similar Documents

Publication Publication Date Title
EP0617190B1 (en) Device for fastening glazings to a supporting structure
EP1166279B1 (en) Installation for very long term storage of heat-generating products such as nuclear waste
EP1662052A1 (en) Apparatus for locking a cover on a frame
EP0415314B1 (en) Condenser made of concrete for turbine with axial outlet and turbine with such a condenser
EP2672134B1 (en) Sealing device for a large rolling bearing
EP0202958B1 (en) Receptacle transport, positioning and alignment device under the loading pit in a nuclear installation
EP0577462B1 (en) Ball screw mounting device ensuring the operation of the closure shelves of a freeze drying chamber
LU84104A1 (en) SEALING SYSTEM FOR ELECTRODES
FR2844825A1 (en) WINDOW OR WINDOW CARRIER, SLIDING WITH LOCKABLE LEAVES WITH SEALED SUPPORT ON THE FRAME
EP0228929B1 (en) Device for the antiseismic connection between the lower pump shaft and the sphere of a nuclear reactor
CH630031A5 (en) TANK DOME CLOSING DEVICE.
FR2926634A1 (en) Sealed axial force measuring device for use in weighing application, has connection unit joining weighting plate and base and prohibiting movement of plate relative to base except translation according to reference axis
WO1992004562A1 (en) Sealing device between the cylinder head and the cylinder lining
FR2525378A1 (en) Support frame for compact nuclear boiler - where reactor vessel and steam generators possess trunnions able to slide in hydraulic ball and socket bearings in frame to absorb shock
EP0003931B1 (en) Device for affixing a vessel to the surface of a foundation
FR2580762A1 (en) Method and device for providing sealing between two components in contact with one another via faced surfaces
EP0014129B1 (en) Valve for a polluting or dangerous fluid that can be operated and demounted from a distance
WO2016030831A1 (en) Parabolic solar sensor
FR2812314A1 (en) Anti-lifting support for civil engineering works comprises container receiving elastomer cushion supporting piston in lower part and sliding plate in upper part, threaded rod with head holding container and plate together
FR1465671A (en) lift for vehicles
FR3119114A1 (en) Sealed suspension stopper device
FR3072443A1 (en) DEVICE FOR STORING CRYOGENIC FLUID
EP0379501A1 (en) Axial piston motor, reversible as a pump, with modular multiple piston chambers
FR2654708A1 (en) Storage tank for a liquid, particularly a hydrocarbon or an alcohol, of the floating roof type
FR3015761A1 (en) DEVICE FOR ADDING AN IRRADIATED FUEL CONTAINER UNDER A PIT IN A NUCLEAR FACILITY AND CONTAINING IRRADIA FUEL

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE DK ES GB IT

17P Request for examination filed

Effective date: 19940603

17Q First examination report despatched

Effective date: 19950802

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE DK ES GB IT

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

REF Corresponds to:

Ref document number: 69307202

Country of ref document: DE

Date of ref document: 19970220

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2096239

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19970404

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20070523

Year of fee payment: 15

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20090629

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090626

Year of fee payment: 17

Ref country code: DE

Payment date: 20090703

Year of fee payment: 17

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080630

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100621

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090621

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110101

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20110715

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110705

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100621

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20080626

Year of fee payment: 17

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20110616

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100622

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20110616