DE102005035053A1 - Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure - Google Patents

Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure

Info

Publication number
DE102005035053A1
DE102005035053A1 DE102005035053A DE102005035053A DE102005035053A1 DE 102005035053 A1 DE102005035053 A1 DE 102005035053A1 DE 102005035053 A DE102005035053 A DE 102005035053A DE 102005035053 A DE102005035053 A DE 102005035053A DE 102005035053 A1 DE102005035053 A1 DE 102005035053A1
Authority
DE
Germany
Prior art keywords
lever
piston
coupling
spring
bore
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Withdrawn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
DE102005035053A
Other languages
German (de)
Inventor
Markus Dipl.-Ing. Proschko
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.)
Schaeffler Technologies AG and Co KG
Original Assignee
Schaeffler Technologies AG and Co KG
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 Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
Priority to DE102005035053A priority Critical patent/DE102005035053A1/en
Publication of DE102005035053A1 publication Critical patent/DE102005035053A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/18Rocking arms or levers
    • F01L1/185Overhead end-pivot rocking arms
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005Deactivating valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/18Rocking arms or levers
    • F01L2001/186Split rocking arms, e.g. rocker arms having two articulated parts and means for varying the relative position of these parts or for selectively connecting the parts to move in unison
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00Valve arrangements comprising rollers

Abstract

The invention relates to a to three different lift heights for a gas exchange valve switchable drag lever (1) of a valve train of an internal combustion engine. This consists of an outer, intermediate and inner lever (2, 3, 4), which are frame-sided nested on a common pivot axis (5). On a lower side (6) of the drag lever (1) at one end (7) a system (8) for a gas exchange valve and at the other end (9) is applied a pivot bearing (10) for a support element. For coupling the lever parts a total of two longitudinally displaceable piston (11, 12) are provided.

Description

  • Territory of invention
  • The The invention relates to a drag lever of a valve train of an internal combustion engine, at different lifting heights for at least a gas exchange valve is switchable and at one end a plant for a Gas exchange valve and at the other end a pivot bearing for a support element or has an axis.
  • background the invention
  • Such a drag lever is in the DE 103 44 406 A1 disclosed. The drag lever consists of an outer lever, which includes an inner lever. At one end, both lever portions are pivotally mounted on a common axis. In the inner lever, a longitudinally displaceable coupling means is provided which extends above a pivot bearing for a support element from and for the coupling case sections under a bow-shaped cam surface of the outer lever is displaceable.
  • adversely it is with the aforementioned drag lever that this has only a limited variability. So can generally only between full and zero stroke or full and minimum stroke be switched.
  • Task of invention
  • task The invention is therefore a switchable drag lever of the aforementioned To create a kind of greater variability while at the same time relative has simple structure.
  • Solution of task
  • According to the invention this Problem solved by the novel features of claim 1. Especially is proposed a frame-like nested lever system, consisting of an exterior, Intermediate and inner lever, which are on a common pivot axis run and the over separately controllable first and second pistons on the side of a Pivot bearings for a support element or an axle either to achieve the different lifting heights with each other can be coupled.
  • Consequently There is a rocker arm switchable design, the greater variability than the has previously known, with the construction cost to achieve a further Hubverlaufes within acceptable limits holds.
  • Of course they are The scope of this invention also includes solutions in which the coupling means are not longitudinal, but transverse or oblique or skewed are displaced. Also, the coupling agents in the area the antithesis means for Cams run.
  • Instead of the proposed piston is also to other elements for coupling like wedges, sliders, etc. thought. If necessary, slider-ball mechanisms can also be applied become.
  • In the case the simultaneous decoupling of all Lever and desired Minimal lift it is necessary that the contact surface on the intermediate lever communicates with a corresponding minimum lift cam. In the case a desired one complete Shutdown should be the area on the intermediate lever as a support surface for a be formed so-called base circle cam. This surface prevents also a "pumping" of the preferably end as support applied hydraulic support element, with the disadvantages known to the experts, such as a tension in the system.
  • Instead of the above-mentioned support element However, is also a pivot axis or the like. As a single-ended storage for the switchable drag lever conceivable and provided.
  • A Supply of the hydraulic fluid to the piston takes place in itself known way about the pivot bearing and short channels to pressure chambers axially in front of the piston.
  • Though It is particularly advantageous if a displacement of the piston in their one direction over hydraulic fluid pressure and accomplished in the opposite direction via compression spring force is. However, it is also conceivable, a provision also via hydraulic fluid pressure or other suitable servo means. Possibly. is too a general admission of the piston in at least one direction via electromagnetic Loading agent possible.
  • Especially It is advantageous if the pistons for coupling (at least two) "stacked" above one another above the pivot bearing run. Thus, space is saved laterally. As driving surfaces for the pistons At the corre sponding end sides of the levers are either recessed complementary Bottoms or holes in this area.
  • According to a further sub-claim, the compression springs for displacing the piston in one Direction preferably integrated into the bore for the respective piston and are at one end to a respective fixed bore in the corresponding hole stop sleeve. The latter also serves as travel limit for the piston in the bore.
  • to Return of the outside lever in the off state to the cam is at least one Torque spring (lost-motion spring) provided. This sits conveniently on the pivot axis, wherein a leg of the spring in the direction of rotation on the outside lever and another leg of the spring acts on the inner lever. A another Lost Motion spring is between a bottom of the inner lever and a top of a cross bow built the intermediate lever. Thus, in the case of disconnection of the inner lever also his return to the cam over guaranteed all speed ranges across.
  • Short description the drawing
  • The Invention is suitably closer to the drawing explained. Show it:
  • 1 in a three-dimensional view of the drag lever according to the invention;
  • 2 a cross section through the drag lever in the region of the pivot axis and
  • 3 a longitudinal section through the drag lever along the longitudinal center axis.
  • Full Description of the drawing
  • The figures reveal a drag lever 1 a valve train of an internal combustion engine, as it is sufficiently known in the art from its basic structure and the mode of action forth. The rocker arm 1 consists of an outer, intermediate and inner lever 2 . 3 . 4 , the frame-like nested on a common pivot axis 5 run. Thus, a total of three different lifting heights for at least one gas exchange valve can be displayed.
  • At a bottom 6 the drag lever acts 1 at one end 7 on an unillustrated gas exchange valve in the hoist one. For this he has a facility 8th on the intermediate lever 3 is applied. At the opposite end 9 has the intermediate lever 3 on the bottom 6 a pivot bearing 10 , This is designed dome-shaped here and serves a one-end support of the rocker arm 1 on a head of a support member not shown in the drawing. About this support element is hydraulic means for displacement of pistons 11 . 12 (see explanation below) in the intermediate lever 3 directed.
  • The levers 2 . 3 . 4 are mutually pivotable on the pivot axis 5 , Furthermore, on the pivot axis 5 two torsion springs 36 provided, which act as a lost motion springs per se known type. In this case serve the torsion springs 36 a return of the outer lever 2 in its uncoupled state to corresponding Großhubnocken, which its contact surface 14 apply.
  • Another lost-motion spring is between a bottom 38 of the inner lever 4 and a top 39 a crossbar 40 of the intermediate lever 3 provided and here as a compression spring 41 educated. This also serves to return the inner lever 4 in its Abkoppelmodus at its stop surface 13 (here roll) impinging small lift cams.
  • Also revealed 1 that the intermediate lever 3 two support surfaces 15 has. These serve as a mating surface for Grundkreisnocken. A contact of these support surfaces 15 prevents with the Grundkreisnocken that the preferably used hydraulic support element disadvantageously "inflates" as a single end support in a known manner.
  • As mentioned at the outset, a total of three different lifting heights for at least one gas exchange valve can be represented by the measures according to the invention. As 3 disclosed in more detail, run this in the intermediate lever 3 , above the pivot bearing 10 , two holes nested one above the other 16 . 19 along. in the hole 16 is a first piston 11 arranged, the sections below a driver surface 17 a crossbeam 18 of the inner lever 4 attacks.
  • From an inner face 28 extends from the piston 11 a cylinder section 30 , here from solid material. This one is through a hole 32 one in the hole 16 arranged stop sleeve 24 guided. Between the stop sleeve 24 and the face 28 of the piston 11 acts a compression spring 22 , Thus, the inner lever 4 with the intermediate lever 3 coupled in the depressurized state. A return displacement of the piston 11 occurs via hydraulic fluid pressure, which via a short channel from the pivot bearing 10 axially behind the stop sleeve 24 in a non-illustrated pressure chamber is conductive.
  • Above the hole 16 for the first piston 11 runs the further hole 19 for the second piston 12 , The second piston 12 is in 1 shown in its decoupled state. He can for a coupling case of the intermediate lever 3 with the outside lever 2 partially under a complementary driving surface 20 a crossbar 21 of the outer lever 2 be shifted hydraulically. The hydraulic fluid is immediately in front of an end face 29 of the second piston 12 directed. Seen in the coupling direction, axially behind the Kol ben 12 , in turn, is a stop sleeve 25 built-in. The second piston 12 lies with its coupling distant face 29 on a forehead 27 the stop sleeve 25 at. Through an opening 33 the stop sleeve 25 that are stationary in the hole 19 is fixed, a cylinder section extends 31 from the piston 12 goes out and in a spring plate 35 ends. The cylinder section 31 is designed as a thin-walled pipe section, as closer in the DE 103 44 406 A1 executed. Between the spring plate 35 and the stop sleeve 25 acts a compression spring 23 , about which the decoupling of the piston 12 is created.
  • The rocker arm 1 follows in the depressurized state, the stroke of the inner lever 4 acting on small lift cam. The outside lever 2 is deactivated and performs a lost-motion movement in relation to the package inner lever 4 + Intermediate lever 3 out. If the gas exchange valve to remain completely closed, it is from the support element via the pivot bearing 10 as far as hydraulic fluid in the pressure chamber behind the first stop sleeve 24 in the hole 16 directed that the piston 11 into the hole 16 withdrawal begins. The force of the compression spring 22 is weaker than the force of the compression spring 23 designed. In this case, the inner and outer levers perform 4 . 2 a lost motion movement relative to the intermediate lever 3 , If the corresponding gas exchange valve realize a large stroke, the hydraulic medium pressure is further increased, so that the upper piston 12 against the force of its compression spring 23 partially under the driver surface 20 of the crossbar 21 of the outer lever 2 moves. Thus, the drag lever completes 1 a lifting movement in the sense of the contact surfaces 14 of the outer lever 2 acting high-lift cams. The inner lever 4 remains deactivated.
  • The levers 2 . 3 . 4 can be made of a lightweight material such as steel or the like. However, it is also possible to form these or parts of these solid or urformtechnisch.
  • 1
    cam follower
    2
    external lever
    3
    intermediate lever
    4
    internal lever
    5
    swivel axis
    6
    bottom
    7
    The End
    8th
    investment
    9
    The End
    10
    pivot bearing
    11
    piston
    12
    piston
    13
    approach surface
    14
    approach surface
    15
    support surface
    16
    drilling
    17
    entraining
    18
    crossbeam
    19
    drilling
    20
    entraining
    21
    locking latch
    22
    compression spring
    23
    compression spring
    24
    stop sleeve
    25
    stop sleeve
    26
    forehead
    27
    forehead
    28
    face
    29
    face
    30
    cylinder section
    31
    cylinder section
    32
    opening
    33
    opening
    34
    Not forgive
    35
    spring plate
    36
    Torsion spring
    37
    Not forgive
    38
    bottom
    39
    top
    40
    locking latch
    41
    compression spring

Claims (6)

  1. Drag lever ( 1 ) of a valve drive of an internal combustion engine, which is switchable to three different lift heights for at least one gas exchange valve, consisting of an outer, intermediate and inner lever ( 2 . 3 . 4 ), which are nested in a frame on a common pivot axis ( 5 ), wherein on a lower side ( 6 ) of the rocker arm ( 1 ) at one end ( 7 ) an annex ( 8th ) for a gas exchange valve and at the other end ( 9 ) a pivot bearing ( 10 ) is applied for a support element or an axle, wherein in the drag lever ( 1 ) at least a first and second piston ( 11 . 12 ) are arranged as coupling means whose displacement is shown in at least one direction via hydraulic fluid pressure, wherein when coupling the inner and the intermediate lever ( 4 . 3 ) over the first piston ( 11 ) and simultaneous decoupling of the outer and intermediate levers ( 2 . 3 ) via the second piston ( 12 ) the inner lever ( 4 ) is active, so that there is a small valve lift, wherein when decoupling the inner and the intermediate lever ( 4 . 3 ) over the first piston ( 11 ) as well as simultaneous coupling of the outer and the intermediate lever ( 2 . 3 ) on the second piston ( 12 ) the outer lever ( 2 ) is active, so that on the other hand a larger valve lift is generated, with simultaneous decoupling of all levers ( 2 . 3 . 4 ) over the pistons ( 11 . 12 ) a zero or minimum stroke is provided and wherein the inner lever ( 4 ) at least one contact surface ( 13 ) for a small lift cam, the outer lever ( 2 ) at least one contact surface ( 14 ) for a large lift cam and the intermediate lever ( 3 ) a support surface ( 15 ) for a base circle or minimum lift cam.
  2. Cam follower according to claim 1, wherein the pistons ( 11 . 12 ) along the rocker arm ( 1 ) are displaceable, which first piston ( 11 ) in an above or laterally of the pivot bearing ( 10 ) extending first bore ( 16 ) of the intermediate lever ( 3 ) and for the coupling case in or under a driver surface ( 17 ) of an end crossbeam ( 18 ) of the inner lever ( 4 ) is slidable in sections, wherein the second piston ( 12 ) above or laterally of the first bore ( 16 ) in a second bore ( 19 ) of the intermediate lever ( 3 ) and for the coupling case in or under a driver surface ( 20 ) one of the intermediate lever ( 3 ) end encompassing transverse bracket ( 21 ) of the outer lever ( 2 ) is slidable in sections.
  3. Drag lever according to claim 1 or 2, wherein the hydraulic fluid from the support element or the axle via the pivot bearing ( 10 ) to the pistons ( 11 . 12 ), wherein a displacement of the first piston ( 11 ) in the coupling direction via the force of a servo means such as at least one in the bore ( 16 ) extending compression spring ( 22 ) and in Entkoppelrichtung on the hydraulic fluid pressure and a displacement of the second piston ( 12 ) in the coupling direction via hydraulic fluid pressure and in Entkoppelrichtung on the force of a servomechanism as at least one in the bore ( 19 ) extending compression spring ( 23 ) is realized.
  4. Cam follower according to claim 1, wherein in the bore ( 16 . 19 ) for at least one of the pistons ( 11 . 12 ), seen in the coupling direction axially behind this, a stop sleeve ( 24 . 25 ) is attached, at the coupling-side forehead ( 26 . 27 ) The piston ( 11 . 12 ) with its coupling remote end face ( 28 . 29 ) rests in the decoupling case, from which far remote Stirnflä surface ( 28 . 29 ) a cylinder section ( 30 . 31 ), which extends through an opening ( 32 . 33 ) the stop sleeve ( 24 . 25 ) and ends optionally a spring plate ( 35 ), between the and a coupling remote end of the stop sleeve ( 25 ) the compression spring ( 23 ) is installed.
  5. Cam follower according to claim 1, wherein between the outer and intermediate levers ( 2 . 3 ) at least one spring element such as a torsion spring ( 36 ) is clamped as a lost motion spring on the pivot axis ( 5 ) between the levers ( 2 . 3 ) runs.
  6. Cam follower according to claim 1, wherein between a lower side ( 38 ) of the inner lever ( 4 ) and a top ( 39 ) of a transverse bar ( 40 ) of the intermediate lever ( 3 ) at least one spring element such as a compression spring ( 41 ) is installed as a lost-motion spring.
DE102005035053A 2005-07-27 2005-07-27 Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure Withdrawn DE102005035053A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102005035053A DE102005035053A1 (en) 2005-07-27 2005-07-27 Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005035053A DE102005035053A1 (en) 2005-07-27 2005-07-27 Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure

Publications (1)

Publication Number Publication Date
DE102005035053A1 true DE102005035053A1 (en) 2007-02-01

Family

ID=37650222

Family Applications (1)

Application Number Title Priority Date Filing Date
DE102005035053A Withdrawn DE102005035053A1 (en) 2005-07-27 2005-07-27 Cam follower for valve operating mechanism of internal combustion engine, has first and second piston which is arranged as a coupling means, their displacement is present in over hydraulic medium pressure

Country Status (1)

Country Link
DE (1) DE102005035053A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007031815A1 (en) 2007-07-07 2009-01-08 Schaeffler Kg Valve gear for internal combustion engine, has control unit adjusting roller and formed at cam arrangement of cam shaft, where roller is admittable with different cam contours by control unit based on switched-rolling position of roller
WO2012069215A1 (en) * 2010-11-25 2012-05-31 Schaeffler Technologies AG & Co. KG Switchable cam follower

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0420159A1 (en) * 1989-09-25 1991-04-03 Nissan Motor Co., Ltd. Variable valve timing rocker arm arrangement for internal combustion engine
DE4206166A1 (en) * 1991-03-14 1992-09-17 Volkswagen Ag Variable valve drive with cams driving inner and outer valve stems - has stems coupled by radially sliding pistons in outer stem, engaging inner stem stops during the cam base circle phase
EP0601250A1 (en) * 1991-09-04 1994-06-15 Honda Giken Kogyo Kabushiki Kaisha Valve operating system in internal combustion engine
DE4436952A1 (en) * 1994-10-15 1996-04-18 Schaeffler Waelzlager Kg Switchable tappet of a valve train of an internal combustion engine
DE19922600A1 (en) * 1998-06-09 1999-12-16 Ford Global Tech Inc Internal combustion engine with variable camshaft synchronization and with an exhaust phase of variable duration
JP2001241309A (en) * 2000-02-29 2001-09-07 Unisia Jecs Corp Valve operating device of engine
DE10310226A1 (en) * 2003-03-08 2004-09-16 Ina-Schaeffler Kg Drag lever of a valve train of an internal combustion engine
DE10316189A1 (en) * 2003-04-09 2004-10-28 Ina-Schaeffler Kg Tow lever for a combustion engine valve drive has outer and inner levers connected through an axle across the inner lever
DE10318295A1 (en) * 2003-04-23 2004-11-11 Ina-Schaeffler Kg Drag lever of a valve train of an internal combustion engine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0420159A1 (en) * 1989-09-25 1991-04-03 Nissan Motor Co., Ltd. Variable valve timing rocker arm arrangement for internal combustion engine
DE4206166A1 (en) * 1991-03-14 1992-09-17 Volkswagen Ag Variable valve drive with cams driving inner and outer valve stems - has stems coupled by radially sliding pistons in outer stem, engaging inner stem stops during the cam base circle phase
EP0601250A1 (en) * 1991-09-04 1994-06-15 Honda Giken Kogyo Kabushiki Kaisha Valve operating system in internal combustion engine
DE4436952A1 (en) * 1994-10-15 1996-04-18 Schaeffler Waelzlager Kg Switchable tappet of a valve train of an internal combustion engine
DE19922600A1 (en) * 1998-06-09 1999-12-16 Ford Global Tech Inc Internal combustion engine with variable camshaft synchronization and with an exhaust phase of variable duration
JP2001241309A (en) * 2000-02-29 2001-09-07 Unisia Jecs Corp Valve operating device of engine
DE10310226A1 (en) * 2003-03-08 2004-09-16 Ina-Schaeffler Kg Drag lever of a valve train of an internal combustion engine
DE10316189A1 (en) * 2003-04-09 2004-10-28 Ina-Schaeffler Kg Tow lever for a combustion engine valve drive has outer and inner levers connected through an axle across the inner lever
DE10318295A1 (en) * 2003-04-23 2004-11-11 Ina-Schaeffler Kg Drag lever of a valve train of an internal combustion engine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007031815A1 (en) 2007-07-07 2009-01-08 Schaeffler Kg Valve gear for internal combustion engine, has control unit adjusting roller and formed at cam arrangement of cam shaft, where roller is admittable with different cam contours by control unit based on switched-rolling position of roller
WO2012069215A1 (en) * 2010-11-25 2012-05-31 Schaeffler Technologies AG & Co. KG Switchable cam follower
US8783219B2 (en) 2010-11-25 2014-07-22 Schaeffler Technologies Gmbh & Co. Kg Switchable cam follower

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Owner name: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 H, DE

R081 Change of applicant/patentee

Owner name: SCHAEFFLER TECHNOLOGIES AG & CO. KG, DE

Free format text: FORMER OWNER: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG, 91074 HERZOGENAURACH, DE

Effective date: 20120822

R005 Application deemed withdrawn due to failure to request examination

Effective date: 20120728