EP2100039A1 - Machine à pistons axiaux et plaque de commande pour une machine à pistons axiaux - Google Patents

Machine à pistons axiaux et plaque de commande pour une machine à pistons axiaux

Info

Publication number
EP2100039A1
EP2100039A1 EP07856525A EP07856525A EP2100039A1 EP 2100039 A1 EP2100039 A1 EP 2100039A1 EP 07856525 A EP07856525 A EP 07856525A EP 07856525 A EP07856525 A EP 07856525A EP 2100039 A1 EP2100039 A1 EP 2100039A1
Authority
EP
European Patent Office
Prior art keywords
control plate
axial piston
piston machine
control
cylinder drum
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.)
Withdrawn
Application number
EP07856525A
Other languages
German (de)
English (en)
Inventor
Martin Zug
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2100039A1 publication Critical patent/EP2100039A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2042—Valves
    • F04B1/205—Cylindrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2021—Details or component parts characterised by the contact area between cylinder barrel and valve plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts
    • F04B1/2042—Valves

Definitions

  • the present invention relates to a
  • Axial piston machine and a control plate for such axial piston machine are axial piston machine and a control plate for such axial piston machine.
  • pistons which are arranged displaceably in longitudinal direction in cylinder bores of a cylinder drum execute a lifting movement during each revolution of the cylinder drum, which movement is composed of a suction stroke and a pressure stroke.
  • a so-called control plate in which usually kidney-shaped control openings for connecting the cylinder drum with a high pressure port and a low pressure port of the axial piston machine are formed ,
  • a classic control plate as known from the prior art and described for example in a similar form in DE 102 51 552 B3, is in the
  • the control plate 100 has an outer diameter which corresponds to the inner diameter of a corresponding housing part of the axial piston machine. In the direction of the ⁇ bgewandten from the cylinder drum side, the control plate 100 is supported on a housing cover, in which the high pressure port and the low pressure port of the axial piston machine are formed.
  • the control plate 100 has distributed over its circumference a plurality of control openings 101 and 102, which are provided for connecting the cylinder drum to the low pressure port and the high pressure port.
  • the control plate 100 In addition to these control openings 101, 102, the so-called suction kidney and the so-called pressure kidney, the control plate 100 also has a central recess which from a shaft of the axial piston machine, which is non-rotatably connected to the cylinder drum, penetrated. At this central recess to join two lateral savings 103, which form a passage for Leckol. Furthermore, a groove 104, which can be removed in particular from the illustration in FIG. 7, is formed in the edge region, which allows a rotationally secure positioning of the control plate 100.
  • this groove 104 cooperates with a mounted in the housing of the machine pin 110, so as to ensure that on the one hand, the plate 100 can not be installed rotated by 180 ° in the axial piston machine and on the other hand no rotation of the plate 100 occurs during operation.
  • control plates have often been preserved in the past, but must be prepared in a relatively laborious process, usually here the plates of bar sections or coarse stamped or forged parts machined, the corresponding parts are machined completely machined on all surfaces.
  • the suction kidney 101, the pressure kidneys 102, the leaking passages 103 and the groove 104 for anti-twist protection are worked out in this operation.
  • the present invention is based on the object to provide a novel distributor or control plate for an axial piston machine, which is on the one hand at least equivalent to the known control plates in terms of their operating characteristics, on the other hand, however, can be made easier and cheaper.
  • control plate for an axial piston machine having the features of claim 1 and an axial piston machine having the features of claim 11.
  • Advantageous developments of the invention are the subject of the dependent claims.
  • the solution according to the invention is based on the idea of configuring the control plate such that an outwardly extending extension surface is formed on a partial region of the outer circumference of the control plate, which is designed to achieve an anti-twist for the control plate such that it has a defined contact with a holding element allows the axial piston machine.
  • the extension surface have a straight edge region which is suitable for bearing against a flat wall of a corresponding holding element.
  • an edge-side recess in the extension surface would also be conceivable or a protrusion, which, for example, with an oval or cylindrical shaped
  • Retaining element or can cooperate with a corresponding recess in the holding element.
  • a control plate for an axial piston machine which has at least two control openings, by means of which cylinder bores rotatably mounted in a housing cylinder drum are connected during rotation of the cylinder drum alternately with a high pressure port and a low pressure port, which is provided according to the invention that at a portion of the Outer circumference of the control plate an outwardly extending extension surface is formed, which is designed to achieve an anti-rotation for the control plate * for defined contact with a holding element of the axial piston machine.
  • the advantage of the solution according to the invention is that can be dispensed with to achieve the anti-rotation on the known pin-groove connection.
  • the rotation is achieved by a special design of the outer periphery or the outer contour of the control plate, which brings with it the advantage that, for example, provided for this purpose continuous recesses throughout, ie can be performed over the entire thickness of the control plate.
  • This in turn means that it is possible to produce the control plate according to the invention in a simple manner by a stamping process, in which case the outer contour, the inner contour and the kidney regions of the control plate are created directly.
  • control plate could also be made by means of laser cutting, in which case a post-processing of the flat surfaces is eliminated, since a high-quality starting material with the required surface quality can be used. Both methods are only conditionally applicable to the control plate according to the prior art, since the preparation of the groove for the rotation can be created only by a machining of the plate.
  • Control opening is reduced in the radial direction.
  • the radially inner edge of the control plate may be formed as a centering surface, which centers the control plate on a housing-side centering.
  • This centering surface may consist of a plurality of partial surfaces, which are formed on radially inwardly extending into the passage opening segments of the inner edge of the control plate.
  • the radial extent of the individual recesses is preferably so great that a gap arises in the region of the recesses between the control plate and the centering body, which gap is suitable for letting accumulated leakage fluid accumulate in the interior of the cylinder drum.
  • an axial piston machine is further proposed with a cylinder drum rotatably mounted in a housing, wherein in the cylinder drum cylinder bores are introduced, in which axially displaceable pistons are arranged, wherein the
  • Cylinder bores to an end face of the cylinder drum have openings that are alternately in connection with a high-pressure port and a low-pressure port with a rotation of the cylinder drum via at least two control ports of a control plate, wherein the control plate is formed according to the inventive idea described above.
  • the machine is designed as a swash plate machine, in which case the holding element for the rotationally secure positioning of
  • Control plate may be formed by the actuating piston guide.
  • Fig. 1 is a schematic representation of an inventively designed axial piston machine
  • Fig. 2 is an illustration of a first
  • Fig. 3 shows the arrangement of the invention
  • Fig. 4 shows the arrangement of an alternative embodiment of an inventive
  • the axial piston machine according to the invention shown in FIG. 1 and generally designated by the reference numeral 1 is largely identical to the axial piston machine known from DE 102 51 552 B3. Accordingly, the structure and function of the known components of the machine 1 will be briefly summarized below.
  • the axial piston machine 1 has a rotatably mounted in a housing 2 shaft 3, on which a cylinder drum 4 is arranged, wherein the
  • the shaft 3 penetrates the cylinder drum 4 and is supported on both sides of the cylinder drum 4 by means of a respective rolling bearing 5 and 6, wherein the lower roller bearing 6 in particular has an outer bearing ring 7 which is inserted into a corresponding recess of a housing cover 8 of the axial piston machine 1 ,
  • a plurality of cylinder bores 9 are formed, wherein the central axes of the cylinder bores 9 extend parallel or inclined to the central axis of the shaft 3.
  • these holes 9 are axially displaceable piston 10 is used, which on the side facing away from the housing cover 8 side have a spherical head 11 which cooperates with a corresponding recess of a shoe 12 to a hinge connection.
  • the piston 10 is supported on a chafing disk 13, so that upon rotation of the
  • Cylinder drum 4 the piston 10 accordingly perform an alternate stroke.
  • the height of the stroke is determined here by the position of the chafing disk 13, which is a perpendicular to the longitudinal axis of the Shaft 3 extending tilting axis can be adjusted.
  • an adjusting device 14 is provided with a piston 50, which cooperates with its two ends on the one hand with the swash plate 13 and on the other hand with a control piston guide 51.
  • the configuration, in particular, of this cylinder-like or pot-type actuating piston guide 51 will be explained in more detail later.
  • the cylinder drum 4 has a central opening 15, in which a compression spring 16 is arranged, which is stretched between a first spring bearing 17 and a second spring bearing 18.
  • the first spring bearing 17 is fixed by the shaft 3 in the axial direction, while the second spring bearing 18 by a in a groove of the
  • Cylinder drum 4 used Seeger ring is formed.
  • the cylinder drum 4 is shifted in the axial direction so far that it rests sealingly with its end face 19 on the control plate 20.
  • the control openings 20 of the control plate 20, which are not visible in the sectional view according to FIG. 1, are in permanent contact with at least one high-pressure connection and a low-pressure connection of the axial piston machine 1 on each side remote from the cylinder drum.
  • the cylinder bores 9 of the drum 4 are connected to the end face 19 via corresponding openings 21 the cylinder drum 4 open, these openings 21 sweep the control plate during rotation of the drum 4 and thereby alternately connected to the control ports for the high pressure or low pressure connection.
  • a passage opening of the control plate 20 has for this purpose a radial extent, which with the outer radial extent of a Zentrierkorpers, which is connected to a Gehausebauteil corresponds.
  • the Zentrierkorper is formed by the outer bearing ring 7 of the rolling bearing 6.
  • the control plate 20 is supported on the housing cover 8, wherein to prevent leakage, the control plate 20 has a sealing environment 28 which is formed on the side remote from the cylinder drum 4 side of the control plate 20 and sealing with the surface of the housing cover 8 interacts.
  • the central passage opening 30 in this case has a diameter which corresponds to the outer circumference of the bearing ring 7 of the rolling bearing 6.
  • the inner edge 33 of the through-opening 30 accordingly forms the aforementioned centering surface 29.
  • the passage opening 30 is further extended by two recesses 34 and 35, between which segments are formed, so that the centering surface 29 ultimately by the partial surfaces 29.1 and 29.2 to the Segments is formed.
  • a gap 22 is partially formed on the circumference of the outer bearing ring 7, which is passable by a leakage fluid.
  • the special feature of the control disk 20 consists in an extension surface 40 extending outward in the upper region of the outer circumference.
  • This extension surface 40 is designed in a special manner in its edge region 41 in order to allow a defined abutment against a retaining element of the axial piston machine. In this way, despite dispensing with the pin-and-groove connection, a rotationally secure arrangement of the control disk 20 is made possible.
  • the extension surface 40 has a straight edge portion 41, which can accordingly cooperate with a flat wall of a holding element. According to the illustration in FIG. 3, it is preferably provided for this purpose that as
  • the previously mentioned actuator piston guide 51 is used.
  • This has a cylinder 52 which rests with its lower end on a pulley 53.
  • this disk 53 is likewise cut straight in its edge region 54, so that the edge region 41 of the extension 40 of the control plate 20 can lie flush against the edge region of the disk 54, as shown in FIG. In this way, a rotation of the control disk 20 during the operation of the axial piston machine 1 is effectively prevented.
  • control disk 20 The advantage of the inventive design of the control disk 20 is that the corresponding configuration of the edge portion 41 of the extension 40 over the entire height or thickness of
  • Control disc 20 may extend. This makes it possible to produce the control disk 20 in a relatively simple and cost-effective manner. For example, a simple punching out of the control disk 20 would be conceivable, wherein At the same time the outer contour, the inner contour and the kidney areas could be created. In this case, only a post-processing on the two plan contact surfaces of the control disk 20 would be required. Alternatively, however, a correspondingly shaped blank could be processed by means of laser cutting, in which case a reworking of the flat surfaces is no longer necessary, since already a high-quality starting material with the necessary surface quality can be used. Both variants are much easier to carry out than previously required for the production of control discs machining machining of bar sections or coarse stamped or forged parts. At the same time, however, the functionality of the control disk is fully respected, as is still achieved by the appropriate design of the edge portion 41 of the extension 40, the desired rotation.
  • Design of the control disk 20 are removed, through which the cost of materials and space requirements is further optimized.
  • the outer edge region 42 of the control plate is reduced in the radial direction in the region of the low-pressure control opening 31.
  • the cost of materials is reduced.
  • 20 openings can be formed by corresponding savings 43 and 44 in the edge region 41 of the expansion surface and / or in one of the extension surface 40 opposite edge region of the control plate, which serve for the lossless discharge of Pumplecköls.
  • FIG. 4 shows an alternative embodiment of a control plate 20 according to the invention, which in the
  • the control piston guide 51 is formed only as upwardly extending cylinder 52, in which case the edge region 41 of Extension surface 40 has an edge-side recess 45 which cooperates with the cylindrical outer contour of the cylinder 52. Again, a rotation of the control disk 20 during operation of the axial piston machine is excluded by this configuration. Furthermore, it would be conceivable to design the extension surface in the edge region with a protrusion or a projection, which then interacts with a corresponding recess or recess in the holding element.
  • the present invention opens the possibility to produce control discs for axial piston machines easier and cheaper. At the same time, however, an exact arrangement and alignment of the control disk in the axial piston machine is still guaranteed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une plaque de commande pour une machine à pistons axiaux, avec au moins deux ouvertures de commande (31, 32) au moyen desquelles des perçages cylindriques (9) d'un tambour cylindrique (4) monté à rotation dans un carter (2) peuvent, lors de la rotation du tambour cylindrique (4), être alternativement reliés à un raccord à haute pression et à un raccord à basse pression. Une surface d'élargissement (40) s'étendant vers l'extérieur est formée sur une région partielle du pourtour extérieur de la plaque de commande (20). Elle est conçue pour s'appliquer de manière définie contre un élément de maintien (52, 53) de la machine à pistons axiaux (1), afin d'obtenir un blocage en rotation de la plaque de commande (20).
EP07856525A 2006-12-11 2007-12-10 Machine à pistons axiaux et plaque de commande pour une machine à pistons axiaux Withdrawn EP2100039A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006058356 2006-12-11
DE102007024174.9A DE102007024174B4 (de) 2006-12-11 2007-05-24 Axialkolbenmaschine mit einer Verdrehsicherung für die Steuerplatte
PCT/EP2007/010759 WO2008071374A1 (fr) 2006-12-11 2007-12-10 Machine à pistons axiaux et plaque de commande pour une machine à pistons axiaux

Publications (1)

Publication Number Publication Date
EP2100039A1 true EP2100039A1 (fr) 2009-09-16

Family

ID=39149348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07856525A Withdrawn EP2100039A1 (fr) 2006-12-11 2007-12-10 Machine à pistons axiaux et plaque de commande pour une machine à pistons axiaux

Country Status (4)

Country Link
US (1) US20090199705A1 (fr)
EP (1) EP2100039A1 (fr)
DE (1) DE102007024174B4 (fr)
WO (1) WO2008071374A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013215866A1 (de) 2013-08-12 2015-02-12 Robert Bosch Gmbh Bauteil für eine hydrostatische Axialkolbenmaschine und damit ausgestattete hydrostatische Axialkolbenmaschine
DE102013215868A1 (de) 2013-08-12 2015-02-12 Robert Bosch Gmbh Bauteil für eine hydrostatische Axialkolbenmaschine und damit ausgestattete hydrostatische Axialkolbenmaschine
FR3011045B1 (fr) * 2013-09-25 2015-10-30 Vianney Rabhi Bague d'etancheite pour distributeur de pompe hydraulique
DE102015212731A1 (de) 2015-07-08 2017-01-12 Robert Bosch Gmbh Gehäuse für eine hydrostatische Axialkolbenmaschine und hydrostatische Axialkolbenmaschine mit einem Gehäuse
GB201609351D0 (en) * 2016-05-26 2016-07-13 Rolls Royce Controls & Data Services Ltd Axial piston pump/motor
DE102017210010A1 (de) * 2017-06-14 2018-12-20 Robert Bosch Gmbh Hydrostatische Axialkolbenmaschine und Steuerplatte für die Axialkolbenmaschine
DE102018205884A1 (de) * 2018-04-18 2019-10-24 Robert Bosch Gmbh Axialkolbenmaschine mit Druckentlastung in den Durchtriebsraum

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3164191A (en) 1960-10-12 1965-01-05 Kaynar Mfg Co Snap-out fastener and channel assembly
DE3719520A1 (de) 1987-06-11 1988-12-22 Hydromatik Gmbh Axialkolbenmaschine mit einer zylindertrommel und einem steuerkoerper
DE3743125A1 (de) * 1987-12-18 1989-07-06 Brueninghaus Hydraulik Gmbh Axialkolbenpumpe
DE19503617C2 (de) * 1995-02-03 1999-06-02 Sauer Sundstrand Gmbh & Co Druckmittelaggregat mit variablem Hubvolumen
DE19539442A1 (de) 1995-10-24 1997-04-30 Sachsenhydraulik Gmbh Steuerscheibe für hydrostatische Kolbenmaschinen
DE29902339U1 (de) 1999-02-10 2000-01-27 Beck & Kaltheuner Fa Befestigungsvorrichtung zur lösbaren Verankerung eines feuerfesten Bauteiles an einem metallischen Bauteil
DE10206958A1 (de) 2002-02-19 2003-08-21 Linde Ag Hydrostatische Verdrängereinheit
DE10251552C5 (de) 2002-11-05 2010-07-15 Brueninghaus Hydromatik Gmbh Axialkolbenmaschine und Steuerplatte für eine Axialkolbenmaschine
DE102004010373A1 (de) 2004-03-03 2005-09-22 Bosch Rexroth Ag Axialkolbenmaschine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008071374A1 *

Also Published As

Publication number Publication date
DE102007024174A1 (de) 2008-06-12
DE102007024174B4 (de) 2022-09-08
WO2008071374A1 (fr) 2008-06-19
US20090199705A1 (en) 2009-08-13

Similar Documents

Publication Publication Date Title
EP1797320B1 (fr) Pompe a pistons radiaux comprenant un poussoir a galet
DE102007024174B4 (de) Axialkolbenmaschine mit einer Verdrehsicherung für die Steuerplatte
WO2009062783A1 (fr) Module de pompe pour appliquer une pression synchronisée sur deux circuits de fluide
DE19504220A1 (de) Verstellbare hydrostatische Pumpe
WO2012034619A1 (fr) Machine à pistons axiaux
DE19527647A1 (de) Axialkolbenmaschine
AT519652B1 (de) Dichtungsvorrichtung und Hydraulikkolben mit Dichtungsvorrichtung
DE10300070A1 (de) Axialkolbenmaschine, Rückzugplatte und Verfahren zum Herstellen einer Rückzugplatte
EP1590569B1 (fr) Machine a pistons axiaux et plaque de commande pour une machine a pistons axiaux
EP1707465A2 (fr) Dispositif de pompe
WO2015086336A1 (fr) Machine à plateau oscillant, plateau oscillant et procédé d'équilibrage hydrostatique d'un raccordement d'élément de réglage d'une machine à plateau oscillant
EP1614905A2 (fr) Moteur rotatif à palettes
WO2012045394A1 (fr) Machine à piston axial équipée d'une plaque de commande insérée dans une rainure d'une partie de carter
WO2006120006A1 (fr) Pompe, en particulier pompe hybride
WO2015086337A1 (fr) Machine à plateau oscillant, plateau oscillant et procédé d'équilibrage hydrostatique d'un raccordement d'élément de réglage d'une machine à plateau oscillant et de réduction de la pression d'un fluide de travail au cours d'un processus d'inversion de marche de la machine à plateau oscillant
DE102006016253B4 (de) Ventilplatte für einen Hubkolbenverdichter
DE102006044294B3 (de) Radialkolbenpumpe
EP0294739B1 (fr) Machine à pistons axiaux avec barillet rotatif et corps de commande
DE10028336C1 (de) Axialkolbenmaschine
AT520821B1 (de) Verfahren zur Herstellung eines längenverstellbaren Pleuels, längenverstellbares Pleuel, Hubkolbenmaschine sowie Fahrzeug
DE4337508A1 (de) Radialkolbenmotor als Einschubmotor
DE19962035A1 (de) Schwenkmotor
DE19527644B4 (de) Hydrostatische Kolbenmaschine
DE3419806C2 (de) Axialkolbenmaschine
DE102021212096A1 (de) Steuerplatte für eine Axialkolbenmaschine, und Axialkolbenmaschine mit einer Steuerplatte

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

17P Request for examination filed

Effective date: 20090123

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

17Q First examination report despatched

Effective date: 20101019

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20120703