FR2857324A1 - Bearing for hydraulic power steering of motor vehicle, has guide ring mounted in steering gearbox, and annular lip seal dynamically and statically sealing outer surface and inner wall of gearbox, respectively - Google Patents
Bearing for hydraulic power steering of motor vehicle, has guide ring mounted in steering gearbox, and annular lip seal dynamically and statically sealing outer surface and inner wall of gearbox, respectively Download PDFInfo
- Publication number
- FR2857324A1 FR2857324A1 FR0308335A FR0308335A FR2857324A1 FR 2857324 A1 FR2857324 A1 FR 2857324A1 FR 0308335 A FR0308335 A FR 0308335A FR 0308335 A FR0308335 A FR 0308335A FR 2857324 A1 FR2857324 A1 FR 2857324A1
- Authority
- FR
- France
- Prior art keywords
- bearing
- seal
- steering
- guide ring
- ring
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/20—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application
- B62D5/22—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/74—Sealings of sliding-contact bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/20—Land vehicles
- F16C2326/24—Steering systems, e.g. steering rods or columns
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Power Steering Mechanism (AREA)
- Sealing Of Bearings (AREA)
Abstract
Description
La présente invention concerne, de façon générale, les systèmes deThe present invention relates, in general, to systems for
direction des véhicules automobiles. Cette invention se rapporte, plus particulièrement, aux directions assistées hydrauliques, dans lesquelles un vérin, alimente en fluide hydraulique, permet d'exercer sur 'la. crémaillère un management of motor vehicles. This invention relates more particularly to hydraulic power steering, in which a jack, feeds hydraulic fluid, allows to exercise on '. rack one
effort qui amplifie la force exercée manuellement par le conducteur sur le volant. Encore plus particulièrement, l'invention s'intéresse à un palier, à fonctions de guidage et d'étanchéité, pour une telle direction assistée hydraulique. effort that amplifies the force exerted manually by the driver on the steering wheel. Even more particularly, the invention is concerned with a bearing, with guiding and sealing functions, for such a hydraulic power steering.
Dans une direction assistée hydraulique de véhicule automobile, le mouvement de translation de la crémaillère, commandé par la rotation du volant, est soutenu par l'action d'un vérin à double effet, alimenté en fluide hydraulique sous pression au moyen d'une pompe, et par l'intermédiaire d'une valve d'assistance liée à la colonne de direction. Le corps du vérin hydraulique d'assistance se confond habituellement avec le carter de direction, dans lequel la crémaillère est montée coulissante, tandis que la tige de ce vérin est constituée par une portion de la crémaillère, sur laquelle est monté un piston qui divise le corps de vérin en deux chambres. Des conduits hydrauliques relient la valve d'assistance aux deux chambres de vérin ainsi délimitées, de manière à alimenter le vérin d'assistance et à déplacer son piston dans un sens ou dans l'autre. In a hydraulic power steering of a motor vehicle, the translation movement of the rack, controlled by the rotation of the steering wheel, is supported by the action of a double-acting cylinder, supplied with hydraulic fluid under pressure by means of a pump , and via an assistance valve connected to the steering column. The body of the hydraulic assistance cylinder usually merges with the steering gear, in which the rack is slidably mounted, while the rod of this jack is constituted by a portion of the rack, on which is mounted a piston which divides the cylinder body in two chambers. Hydraulic conduits connect the assistance valve to the two cylinder chambers thus delimited, so as to feed the assistance cylinder and to move its piston in one direction or the other.
Ainsi, à une extrémité du carter de direction, qui se confond avec une extrémité du vérin hydraulique d'assistance, il convient d'assurer une fonction de palier de guidage pour la crémaillère qui sort du carter, et aussi une fonction d'étanchéité vis-à-vis de la chambre de vérin entourant la crémaillère. Thus, at one end of the steering casing, which merges with one end of the hydraulic assist cylinder, it is necessary to ensure a guide bearing function for the rack that leaves the housing, and also a sealing function screw to the cylinder chamber surrounding the rack.
Actuellement, ces deux fonctions sont réalisées par des composants distincts, qui sont d'une part un palier de guidage, et d'autre part un joint d'étanchéité. Currently, these two functions are performed by separate components, which are on the one hand a guide bearing, and on the other hand a seal.
II convient donc de prévoir ici des pièces distinctes, réalisant respectivement les deux fonctions, et d'effectuer un montage séparé de ces pièces. Cette complexité induit des coûts de fabrication et d'assemblage non négligeables. It is therefore appropriate to provide here separate parts, performing respectively the two functions, and perform a separate assembly of these parts. This complexity leads to significant manufacturing and assembly costs.
La présente invention vise à remédier à ces inconvénients, donc à réduire la complexité et les coûts de réalisation des fonctions ici considérées. The present invention aims to remedy these drawbacks, thus reducing the complexity and the costs of carrying out the functions considered here.
A cet effet, l'invention a essentiellement pour objet un palier pour direction assistée hydraulique de véhicule automobile, et plus particulièrement un palier de guidage de la crémaillère, placé à une extrémité du carter de direction qui constitue aussi une extrémité du vérin hydraulique d'assistance, le palier comprenant une bague de guidage prévue pour être montée dans le carter de direction, et un joint annulaire à lèvre solidarisé avec la bague, le joint étant situé sur le côté de la bague tourné à l'opposé de l'extrémité du carter, ce joint venant en contact d'étanchéité dynamique, par sa partie de plus petit diamètre, avec la surface extérieure de la crémaillère et venant aussi en contact d'étanchéité statique, par sa partie de plus grand diamètre, avec la paroi intérieure du carter de direction. For this purpose, the subject of the invention is essentially a bearing for hydraulic power steering of a motor vehicle, and more particularly a guide bearing of the rack, placed at one end of the steering gear which also constitutes an end of the hydraulic cylinder of assistance, the bearing comprising a guide ring adapted to be mounted in the steering housing, and an annular lip seal secured to the ring, the seal being located on the side of the ring turned away from the end of the casing, this seal coming into dynamic sealing contact, by its smaller diameter portion, with the outer surface of the rack and also coming into static sealing contact, by its part of larger diameter, with the inner wall of the steering gear.
Dans une forme de réalisation préférée, le joint annulaire à lèvre possède une armature retournée, surmoulée contre l'extérieur de la bague de 10 guidage. In a preferred embodiment, the annular lip seal has an upturned frame overmolded against the outside of the guide ring.
L'ensemble constitué par le joint à armature et par la bague de guidage est avantageusement emmanché de façon serrée dans le carter de direction. Cet ensemble peut être aussi arrêté, dans son mouvement de translation dû à la pression hydraulique, au moyen d'un jonc inséré dans le carter, vers l'extrémité de ce dernier. The assembly formed by the reinforcement seal and the guide ring is advantageously fitted tightly into the steering housing. This assembly can also be stopped, in its translational movement due to the hydraulic pressure, by means of a ring inserted into the housing, towards the end of the latter.
A titre facultatif, le palier objet de l'invention comprend encore une bague anti-extrusion, insérée entre le joint annulaire à lèvre et la bague de guidage, sur le côté radialement intérieur du palier. Optionally, the bearing object of the invention also comprises an anti-extrusion ring, inserted between the lip seal ring and the guide ring, on the radially inner side of the bearing.
Ainsi, l'invention fournit un palier de guidage de conception "monobloc", qui assure par lui-même non seulement la fonction de guidage de la crémaillère mais aussi les fonctions d'étanchéité dynamique et statique, ainsi que, par sa bague, la reprise des efforts radiaux induits par la crémaillère. Thus, the invention provides a guide bearing design "monobloc", which by itself ensures not only the guiding function of the rack but also the functions of dynamic and static sealing, and by its ring, the recovery of the radial forces induced by the rack.
L'ensemble des fonctions est donc réalisé par des pièces en nombre réduit, et liées entre elles avant montage dans le carter, ce qui simplifie les opérations de montage. Les coûts de fabrication et de montage s'en trouvent diminués de façon sensible. The set of functions is therefore achieved by reduced number of parts, and linked together before mounting in the housing, which simplifies assembly operations. Manufacturing and assembly costs are significantly reduced.
De toute façon, l'invention sera mieux comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple, une forme d'exécution de ce palier pour direction assistée hydraulique de véhicule automobile. In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing representing, by way of example, an embodiment of this bearing for hydraulic power steering of a motor vehicle.
La figure unique du dessin est une vue partielle en coupe d'une direction assistée hydraulique, pourvue d'un palier conforme à la présente invention. The single figure of the drawing is a partial sectional view of a hydraulic power steering, provided with a bearing according to the present invention.
Comme le montre cette figure, la direction assistée hydraulique comprend un carter fixe tubulaire 2, dans lequel est montée axialement coulissante une crémaillère 3 dont les deux extrémités (une seule extrémité étant visible) se situe à l'extérieur du carter 2. La crémaillère 3 possède une denture, venant en prise avec un pignon dont l'arbre est accouplé à la colonne de direction (non représentée). L'extrémité de la crémaillère 3 porte un boîtier de rotule axiale 4, servant à l'articulation d'une biellette de direction 5 associée à l'une des roues directrices du véhicule concerné, et commandant l'orientation de cette roue. As shown in this figure, the hydraulic power steering comprises a tubular fixed casing 2, in which is mounted axially sliding a rack 3 whose two ends (one end being visible) is located outside the housing 2. The rack 3 has a toothing, engaging a pinion whose shaft is coupled to the steering column (not shown). The end of the rack 3 carries an axial ball joint housing 4, used for the articulation of a steering link 5 associated with one of the steering wheels of the vehicle concerned, and controlling the orientation of this wheel.
S'agissant ici d'une direction assistée hydraulique, celle-ci comprend un vérin hydraulique d'assistance, dont le corps est constitué par une portion du carter 2, et dont la tige est constituée par une portion non dentée de la crémaillère 3. Cette tige porte un piston en contact glissant avec la paroi intérieure 2a du carter 2, et divisant l'intérieur du vérin en deux chambres, dont l'une est visible en 6. La chambre de vérin 6 est alimentée en fluide hydraulique, par l'intermédiaire d'une valve d'assistance, et au travers d'un orifice 7 ménagé dans le carter 2. As regards a hydraulic power steering, this comprises a hydraulic assist cylinder, whose body is constituted by a portion of the casing 2, and whose stem is constituted by a toothless portion of the rack 3. This rod carries a piston in sliding contact with the inner wall 2a of the housing 2, and dividing the inside of the cylinder into two chambers, one of which is visible at 6. The cylinder chamber 6 is supplied with hydraulic fluid, by means of intermediate of an assistance valve, and through an orifice 7 formed in the housing 2.
Vers l'extrémité du carter 2, il est monté un palier 8 qui assure le maintien et le guidage en translation de la crémaillère 3, et qui ferme la chambre de vérin 6, du côté opposé au piston. Le palier 8 se compose essentiellement d'une bague de guidage 9 et d'un joint annulaire 10. La bague de guidage 9 est une pièce en matière plastique rigide, qui comporte une surface intérieure cylindrique lisse de guidage 11, et des nervures radiales de raidissement 12. Towards the end of the casing 2, there is mounted a bearing 8 which maintains and guides in translation the rack 3, and which closes the cylinder chamber 6, on the opposite side to the piston. The bearing 8 consists essentially of a guide ring 9 and an annular seal 10. The guide ring 9 is a piece of rigid plastic material, which has a smooth cylindrical inner guiding surface 11, and radial ribs of stiffening 12.
Le joint annulaire 10 est un joint à lèvre, pourvu d'une armature retournée 13. Le joint 10 prend place sur le côté de la bague 9 qui est tourné à l'opposé de l'extrémité du carter 2. L'armature 13 du joint 10 se prolonge, en direction de cette extrémité de carter, autour de la partie extérieure de la bague 9. Le joint 10 à armature 13 est solidarisé avec la bague 9 par surmoulage. The annular seal 10 is a lip seal, provided with an inverted reinforcement 13. The seal 10 takes place on the side of the ring 9 which is turned away from the end of the housing 2. The frame 13 of the seal 10 is extended, towards this housing end, around the outer portion of the ring 9. The seal 10 to frame 13 is secured to the ring 9 by overmolding.
Une bague anti-extrusion 14 peut être insérée entre le joint 10 et la bague de guidage 9, sur le côté radialement intérieur du palier 8. An anti-extrusion ring 14 can be inserted between the seal 10 and the guide ring 9 on the radially inner side of the bearing 8.
Ce palier 8, constitué par l'assemblage de la bague de guidage 9 et du joint annulaire 10, et éventuellement de la bague anti-extrusion 14, est emmanché de façon serrée dans le carter 2, vers l'extrémité de celui-ci. Un jonc 15, inséré dans le carter 2 également vers l'extrémité de ce dernier, assure l'arrêt en translation du palier 8, dans son mouvement de translation dû à la pression hydraulique dans la chambre de vérin 6. This bearing 8, consisting of the assembly of the guide ring 9 and the annular seal 10, and possibly the anti-extrusion ring 14, is pressed tightly into the casing 2, towards the end thereof. A ring 15, inserted in the casing 2 also towards the end of the latter, ensures the translation stop of the bearing 8, in its translational movement due to the hydraulic pressure in the cylinder chamber 6.
Le palier 8 se trouvant ainsi immobilisé dans le carter 2, sa bague 9 assure le guidage en translation de la crémaillère 3, par la coopération de la surface intérieure lisse 11 de ladite bague 9 avec la surface extérieure de la crémaillère 3. De plus, les efforts radiaux induits par la crémaillère 3 sont repris par la bague 9, raidie par ses nervures radiales 12, et sont ainsi transmis au carter 2. The bearing 8 is thus immobilized in the casing 2, its ring 9 ensures the translation of the rack 3 by the cooperation of the smooth inner surface 11 of said ring 9 with the outer surface of the rack 3. In addition, the radial forces induced by the rack 3 are taken up by the ring 9, stiffened by its radial ribs 12, and are thus transmitted to the casing 2.
Quant au joint annulaire 10, celui-ci assure, par sa partie de plus petit diamètre à lèvre, un contact d'étanchéité dynamique avec la surface extérieure de la crémaillère 3. Le joint annulaire 10 assure aussi, par sa partie de plus grand diamètre, un contact d'étanchéité statique avec la paroi intérieure 2a du carter 2. As for the annular seal 10, it ensures, by its smaller diameter lip portion, a dynamic sealing contact with the outer surface of the rack 3. The annular seal 10 also ensures, by its larger diameter portion. , a static sealing contact with the inner wall 2a of the casing 2.
Indépendamment du palier 8, qui assure le guidage en translation de la crémaillère 3, il est prévu une butée 16 montée et serrée entre l'extrémité de la crémaillère 3 et le boîtier de rotule axiale 4. En fin de course de la crémaillère 3 (dans son mouvement vers la gauche, par référence au dessin), la butée 16 vient en contact avec une face frontale du carter 2. Independently of the bearing 8, which provides the translational guidance of the rack 3, there is provided a stop 16 mounted and clamped between the end of the rack 3 and the axial ball-and-socket housing 4. At the end of the rack 3 ( in its movement to the left, with reference to the drawing), the stop 16 comes into contact with a front face of the casing 2.
Comme il va de soi, l'invention ne se limite pas à la seule forme d'exécution de ce palier pour direction assistée hydraulique qui a été décrite ci-dessus, à titre d'exemple; elle en embrasse, au contraire, toutes les variantes de réalisation et d'application respectant le même principe, quels que soient notamment les détails de forme de la bague de guidage et du joint, les matières constitutives de ces éléments et leur mode d'assemblage. It goes without saying that the invention is not limited to the sole embodiment of this bearing for hydraulic power steering which has been described above, for example; it embraces, on the contrary, all variants of implementation and application respecting the same principle, regardless of the particular shape of the guide ring and the seal, the constituent materials of these elements and their method of assembly .
Claims (6)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0308335A FR2857324B1 (en) | 2003-07-08 | 2003-07-08 | BEARING FOR POWER STEERING HYDRAULIC OF MOTOR VEHICLE |
| DE200410033167 DE102004033167B4 (en) | 2003-07-08 | 2004-07-08 | Bearing for a hydraulic power steering for motor vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0308335A FR2857324B1 (en) | 2003-07-08 | 2003-07-08 | BEARING FOR POWER STEERING HYDRAULIC OF MOTOR VEHICLE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2857324A1 true FR2857324A1 (en) | 2005-01-14 |
| FR2857324B1 FR2857324B1 (en) | 2006-09-15 |
Family
ID=33522857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0308335A Expired - Fee Related FR2857324B1 (en) | 2003-07-08 | 2003-07-08 | BEARING FOR POWER STEERING HYDRAULIC OF MOTOR VEHICLE |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102004033167B4 (en) |
| FR (1) | FR2857324B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2420707A1 (en) * | 2010-08-17 | 2012-02-22 | Jtekt Europe | Assembly for a steering system of a vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060266140A1 (en) * | 2005-05-31 | 2006-11-30 | Harer Dennis F | Integrated lock ring and rack bushing for rack and pinion steering assembly |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1332645A (en) * | 1970-01-14 | 1973-10-03 | Alford Alder Engs | Steering units having hydraulic seals |
| FR2416151A1 (en) * | 1978-01-31 | 1979-08-31 | Renault | Power-assisted steering system - has sliding rack displaceable by integral hydraulic piston which is fixed by internal ring engaging in rack groove |
| US4211152A (en) * | 1978-04-17 | 1980-07-08 | Trw Inc. | Power steering motor seal |
| GB2046682A (en) * | 1979-03-03 | 1980-11-19 | Nissan Motor | Rack-type Power Steering Cylinder Device |
| US4560177A (en) * | 1984-08-09 | 1985-12-24 | Chicago Rawhide Mfg. Co. | Contoured shaft seal for high pressure applications |
| EP0261854A1 (en) * | 1986-09-20 | 1988-03-30 | Rolls-Royce Motor Cars Limited | Rack and pinion gear |
| US5868216A (en) * | 1995-04-15 | 1999-02-09 | Trw Fahrwerksystems Gmbh & Co. Kg | Hydraulic rack-and-pinion steering assembly |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5181581A (en) * | 1991-02-08 | 1993-01-26 | Trw Inc. | Rack bushing with integral seal |
| DE4317489A1 (en) * | 1993-05-26 | 1994-12-01 | Teves Gmbh Alfred | Rod seal |
-
2003
- 2003-07-08 FR FR0308335A patent/FR2857324B1/en not_active Expired - Fee Related
-
2004
- 2004-07-08 DE DE200410033167 patent/DE102004033167B4/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1332645A (en) * | 1970-01-14 | 1973-10-03 | Alford Alder Engs | Steering units having hydraulic seals |
| FR2416151A1 (en) * | 1978-01-31 | 1979-08-31 | Renault | Power-assisted steering system - has sliding rack displaceable by integral hydraulic piston which is fixed by internal ring engaging in rack groove |
| US4211152A (en) * | 1978-04-17 | 1980-07-08 | Trw Inc. | Power steering motor seal |
| GB2046682A (en) * | 1979-03-03 | 1980-11-19 | Nissan Motor | Rack-type Power Steering Cylinder Device |
| US4560177A (en) * | 1984-08-09 | 1985-12-24 | Chicago Rawhide Mfg. Co. | Contoured shaft seal for high pressure applications |
| EP0261854A1 (en) * | 1986-09-20 | 1988-03-30 | Rolls-Royce Motor Cars Limited | Rack and pinion gear |
| US5868216A (en) * | 1995-04-15 | 1999-02-09 | Trw Fahrwerksystems Gmbh & Co. Kg | Hydraulic rack-and-pinion steering assembly |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2420707A1 (en) * | 2010-08-17 | 2012-02-22 | Jtekt Europe | Assembly for a steering system of a vehicle |
| FR2963956A1 (en) * | 2010-08-17 | 2012-02-24 | Jtekt Europe Sas | ASSEMBLY FOR A STEERING SYSTEM OF A VEHICLE |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102004033167A1 (en) | 2005-02-10 |
| DE102004033167B4 (en) | 2011-08-18 |
| FR2857324B1 (en) | 2006-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20150331 |