US20130306009A1 - Valve train actuating device for an internal combustion engine - Google Patents

Valve train actuating device for an internal combustion engine Download PDF

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Publication number
US20130306009A1
US20130306009A1 US13/872,366 US201313872366A US2013306009A1 US 20130306009 A1 US20130306009 A1 US 20130306009A1 US 201313872366 A US201313872366 A US 201313872366A US 2013306009 A1 US2013306009 A1 US 2013306009A1
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US
United States
Prior art keywords
piston
supporting
cam follower
actuating device
pressure medium
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.)
Abandoned
Application number
US13/872,366
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English (en)
Inventor
Peter Sailer
Wolfgang Christgen
Jurgen Kretschmer
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
Assigned to Schaeffler Technologies AG & Co. KG reassignment Schaeffler Technologies AG & Co. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHRISTGEN, WOLFGANG, KRETSCHMER, JURGEN, SAILER, PETER
Publication of US20130306009A1 publication Critical patent/US20130306009A1/en
Assigned to SCHAEFFLER TECHNOLOGIES GMBH & CO. KG reassignment SCHAEFFLER TECHNOLOGIES GMBH & CO. KG MERGER AND CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: Schaeffler Technologies AG & Co. KG, SCHAEFFLER VERWALTUNGS 5 GMBH
Assigned to Schaeffler Technologies AG & Co. KG reassignment Schaeffler Technologies AG & Co. KG CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG
Assigned to Schaeffler Technologies AG & Co. KG reassignment Schaeffler Technologies AG & Co. KG CORRECTIVE ASSIGNMENT TO CORRECT THE PROPERTY NUMBERS PREVIOUSLY RECORDED ON REEL 037732 FRAME 0347. ASSIGNOR(S) HEREBY CONFIRMS THE APP. NO. 14/553248 SHOULD BE APP. NO. 14/553258. Assignors: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L2001/187—Clips, e.g. for retaining rocker arm on pivot

Definitions

  • the invention concerns a valve train actuating device for an internal combustion engine.
  • Hydraulic support elements for cam followers in valve trains are usually supplied with pressurized oil from the engine oil pump of the internal combustion engine through a gallery.
  • a hydraulic support element for a switchable finger lever of a valve train of an internal combustion engine is shown in DE 10 2008 038 792 A1.
  • a pressure piston is guided in a bore of a pot-shaped housing on which the finger lever is supported with an end region on a head protruding out of the housing.
  • Two reservoirs for the pressure medium for a hydraulic valve lash adjustment are configured in the interior of the pressure piston. The pressure medium supply to the reservoirs in the piston is effected through the oil pump of the internal combustion engine.
  • oil supply channels and/or openings are required in the cylinder head of the internal combustion engine and on the housing of the support element, and these can only be realized through use of complex and expensive means. In addition, this leads to an additional requirement of energy for the oil pump.
  • the support element is to be installed in an inclined position of the support element relative to the horizontal line, there exists the danger of the pressure medium leaking out of the pressure medium supply openings of the housing. Further, this also necessitates provision of a pressure relief opening on the housing in order to avoid a pumping-up of the support element with hydraulic medium during operation.
  • the object of the invention is therefore to simplify and make more cost-effective the pressure medium supply to the hydraulic support element in a valve train actuating device of the pre-cited type. This object is achieved with one or more features of the invention.
  • the invention For pressure medium supply to the reservoir in the piston of the hydraulic support element, the invention provides configuring a pressure medium inlet on the supporting head of the piston and on the supporting region of the cam follower. In this way, complex and expensive constructional measures for pressure medium supply on the cylinder head of the internal combustion engine and on the housing of the support element are avoided. Under the action of gravitational force, the pressure medium can flow via the pressure medium inlet on the supporting head in a simple manner into the reservoir of the piston so that a pump is not required for the pressure medium supply. Further, because no through-openings for the pressure medium supply are required on the housing of the support element, a leakage of pressure medium out of the support element in an installation position that is inclined relative to the horizontal line can be prevented.
  • the pressure medium inlet is configured in the form of two through-bores that correspond to each other and are situated respectively, on the supporting region of the cam follower and on the supporting head of the piston.
  • the outer side of the supporting region of the cam follower facing away from the supporting head comprises in the region of the through-bore of the pressure medium inlet, a means for collecting pressure medium and routing this pressure medium into the through-bore.
  • the oil particularly in the form of spray oil, existing in the region of the cylinder head under operational conditions and emanating from the engine or lubricant oil circulation of the internal combustion engine can be utilized for the pressure medium supply.
  • At least one baffle plate that is connected to the supporting region of the cam follower.
  • the baffle plate is funnel-shaped or configured with a V-shaped cross-sectional profile.
  • the baffle plate can be configured as a sheet metal clip that surrounds the supporting region of the cam follower at least partially.
  • the baffle plate in one piece with a retaining element for fixing the supporting head of the piston on the supporting region of the cam follower.
  • the piston comprises two piston parts that are arranged coaxially to each other, behind each other in the housing.
  • the piston protrudes with an upper piston part out of the housing on the supporting head. This embodiment enables an internal pressure medium return within the support element between the reservoir and the high pressure chamber on the lower piston part. This results in very short sinking times of the piston during the cam lift phase.
  • FIG. 1 shows a section of a valve train actuating device according to the invention for an internal combustion engine, in a first example of embodiment
  • FIG. 2 shows a section of a valve train actuating device according to the invention for an internal combustion engine, in a second example of embodiment
  • FIG. 3 shows a section of a valve train actuating device according to the invention for an internal combustion engine, in a third example of embodiment
  • FIG. 4 shows a section of a valve train actuating device according to the invention for an internal combustion engine, in a fourth example of embodiment.
  • the valve train actuating device shows a lever-type cam follower of a valve train, not further shown, of an internal combustion engine, and a hydraulic support element for supporting the cam follower.
  • the hydraulic support element comprises a pot-shaped housing 1 in which a cylindrical piston is guided. The piston protrudes with a supporting head 2 out of the housing 1 .
  • the lever-type cam follower is pivotally supported through one end region on the supporting head 2 .
  • a reservoir 3 for pressure medium for realizing a hydraulic valve lash adjustment is configured in the interior of the piston.
  • the piston is made in two parts i.e., a piston upper part and a piston lower part, the piston upper part comprising the supporting head 2 .
  • the piston upper part and the piston lower part are arranged coaxially behind each other in the housing 1 .
  • the end of the piston upper part facing away from the supporting head 2 is situated on the piston lower part which, in its turn, is supported through a re-setting spring on the closed bottom of the housing 1 .
  • the reservoir 3 is configured in the interior of the piston upper part and the piston lower part.
  • a non-return valve is arranged on the piston lower part and connects the reservoir 3 to a high pressure chamber for pressure medium for the hydraulic valve lash adjustment, said high pressure chamber being situated in the housing 1 and defined at a front end by the piston lower part.
  • the cam follower is configured as a finger lever and is pivotally supported at one end section on a semi-spherical supporting region 4 on the supporting head 2 of the piston.
  • the support element is fixedly arranged with its housing 1 in a bore on the cylinder head, not shown, of the internal combustion engine.
  • the finger lever cooperates with a gas exchange valve of the internal combustion engine.
  • the supporting head 2 of the piston comprises a central axial through-bore 5 that corresponds on one side to a through-bore 6 on the supporting region 4 and communicates on the other side with the reservoir 3 in the interior of the piston.
  • the through-bores 5 , 6 form a pressure medium inlet to the pressure medium supply of the reservoir 3 in the piston of the support element.
  • the oil existing under operational conditions in the form of spray in the region of the cylinder head or dripping from adjacent components out of the engine circulation or the lubricating oil circulation of the internal combustion engine to settle on the outer side of the supporting region 4 facing away from the supporting head 2 and to flow under the action of gravitational force through the through-bore 6 and the corresponding through-bore 5 into the reservoir 3 in the piston.
  • the oil already situated in the cylinder head region of the internal combustion engine for a pressure medium supply to the support element is utilized, so that a pressure medium supply through the oil pump of the internal combustion engine is not required.
  • the pressure medium inlet to be connected to the pressure medium supply of the internal combustion engine, for example, through tubes.
  • the inner diameter of the through-bore 6 on the supporting region 4 is approximately twice as large as the inner diameter of the through-bore 5 on the supporting head 2 of the piston. In this way, it is guaranteed that during a pivoting of the finger lever during operation, the through-bores 5 , 6 are in constant overlap with each other at least partially and thus guarantee a flow of pressure medium into the reservoir 3 .
  • the through-bores 5 , 6 can also be configured such as to overlap each other only temporarily during operation.
  • the internal pressure medium return between the high pressure chamber and the reservoir takes place through a leak gap 7 between the outer peripheral wall of the piston lower part and the inner peripheral wall of the housing 1 and through a plurality of radially extending bead-like depressions 8 on the upper front end of the piston lower part facing the piston upper part.
  • the depressions 8 connect the leak gap 7 to the reservoir 3 in the piston lower part.
  • the edge of the upper front end of the piston lower part comprises a continuous annular bezel on which the pressure medium flowing in the leak gap can collect.
  • a further pressure medium return is enabled through an annular return groove 9 configured on the outer peripheral wall of the piston upper part, said return groove 9 communicating via a through-bore 10 with the reservoir 3 in the piston upper part. It is also imaginable to provide a plurality of such return grooves comprising one or more through-bores on the piston upper part.
  • FIG. 2 shows a hydraulic support element for a finger lever in a second example of embodiment.
  • the piston is made in one part. This leads to a reduction of the axial design length of the support element.
  • the internal pressure medium return between the reservoir 3 and the high pressure chamber takes place in this case through a leak gap situated between the outer peripheral wall of the piston and the inner peripheral wall of the housing 1 , and between the outer peripheral wall of the piston and the return groove 9 and the through-bore 10 on the piston.
  • FIG. 3 shows a hydraulic support element arranged in an installation position inclined relative to the horizontal line and comprising a two piece piston, for use in a V-type engine.
  • a bushing 11 Starting from the end of the piston upper part facing away from the supporting head 2 of the piston upper part is arranged in the reservoir 3 , a bushing 11 that extends into the region of the supporting head 2 . In this way, in an inclined installation position, the bushing 11 prevents the pressure medium from flowing out through the through-bore 10 in the piston upper part.
  • a collector in the form of a collecting and baffling element 12 is arranged in the region of the through-bore 6 , on the outer side of the supporting region 4 of the cam follower turned away from the supporting head 2 .
  • These collecting and baffling means 12 serve to collect the oil present under operational conditions in the region of the cylinder head and route this oil into the through-bore 6 on the supporting region 4 of the cam follower.
  • the oil level of oil collected is indicated in the figure through an interrupted line.
  • the collecting and baffling element 12 in this case is configured as a funnel-shaped baffle plate configured on the outer side of the supporting region 4 turned away from the supporting head 2 .
  • the oil level of oil collected on the baffle plate is indicated in the figure through an interrupted line.
  • a through-opening 13 is arranged on the bottom of the funnel and corresponds on the outer side of the supporting region 4 to the through-bore 6 .
  • the baffle plate forms a sheet metal clip that surrounds the supporting region 4 on the end of the cam follower.
  • the clip On its side facing the supporting head 2 , the clip comprises an opening at which the clip partially surrounds the supporting head 2 of the piston on a constriction, so that the piston is retained on the semi-spherical supporting region if the cam follower.
  • the baffle plate forms at the same time a retaining clamp for the support element, said retaining clamp serving in particular as a transportation safety device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
US13/872,366 2012-05-16 2013-04-29 Valve train actuating device for an internal combustion engine Abandoned US20130306009A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012208238.7 2012-05-16
DE102012208238A DE102012208238A1 (de) 2012-05-16 2012-05-16 Ventiltriebsbetätigungseinrichtung für eine Brennkraftmaschine

Publications (1)

Publication Number Publication Date
US20130306009A1 true US20130306009A1 (en) 2013-11-21

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US13/872,366 Abandoned US20130306009A1 (en) 2012-05-16 2013-04-29 Valve train actuating device for an internal combustion engine

Country Status (3)

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US (1) US20130306009A1 (de)
CN (1) CN103422924B (de)
DE (1) DE102012208238A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170067374A1 (en) * 2014-04-29 2017-03-09 Schaeffler Technologies AG & Co. KG Component of a valve drive of an internal combustion engine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6402066B2 (ja) * 2015-04-02 2018-10-10 株式会社オティックス ラッシュアジャスタ
DE102016124579B3 (de) 2016-12-16 2018-05-03 Schaeffler Technologies AG & Co. KG Autonomes hydraulisches Abstützelement
DE102017117946B3 (de) 2017-08-08 2018-08-23 Schaeffler Technologies AG & Co. KG Hydraulisches Abstützelement für einen Ventiltrieb einer Brennkraftmaschine
DE102017118852A1 (de) * 2017-08-18 2019-02-21 Man Truck & Bus Ag Kraftübertragungsvorrichtung für variablen Ventiltrieb
DE102022102356A1 (de) 2022-02-01 2023-08-03 Schaeffler Technologies AG & Co. KG Hydraulisch autarkes Abstützelement für einen Ventiltrieb einer Brennkraftmaschine
DE102022102355A1 (de) 2022-02-01 2023-08-03 Schaeffler Technologies AG & Co. KG Hydraulisch autarkes Abstützelement für einen Ventiltrieb einer Brennkraftmaschine

Citations (17)

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Publication number Priority date Publication date Assignee Title
US3861365A (en) * 1971-12-08 1975-01-21 Daimler Benz Ag Mechanism for adjusting and maintaining the valve play in internal combustion engines, especially in motor vehicle internal combustion engines
US4338894A (en) * 1978-04-20 1982-07-13 Aisin Seiki Kabushiki Kaisha Self-contained hydraulic lash adjuster
US4596213A (en) * 1985-06-20 1986-06-24 Eaton Corporation Cap retainer for hydraulic lash adjuster assembly
JPS63113109A (ja) * 1986-10-31 1988-05-18 Fuji Valve Co Ltd バルブラツシユアジヤスタ
US4887566A (en) * 1988-09-30 1989-12-19 Fuji Valve Co., Ltd. Hydraulic valve lash adjuster
JPH0295706A (ja) * 1988-09-30 1990-04-06 Fuji Valve Co Ltd エンドピボットタイプバルブラッシュアジャスタのプランジャの成形方法
WO2006048101A1 (de) * 2004-11-04 2006-05-11 Schaeffler Kg Ventiltrieb einer brennkraftmaschine
US20080196683A1 (en) * 2007-02-16 2008-08-21 Hayman Alan W High performance overhead valvetrain assembly
US20100037845A1 (en) * 2008-08-13 2010-02-18 Schaeffler Kg Hydraulic support element for a switchable cam follower of a valve drive of an internal combustion engine
US20100071649A1 (en) * 2008-09-23 2010-03-25 Eaton Corporation Ball plunger for use in a hydraulic lash adjuster and method of making same
US20100229811A1 (en) * 2009-03-12 2010-09-16 Schaeffler Technologies Gmbh & Co. Kg Switchable component of a valve train of an internal combustion engine
DE102009040608A1 (de) * 2009-09-08 2011-03-10 Schaeffler Technologies Gmbh & Co. Kg Baueinheit für einen Ventiltrieb einer Brennkraftmaschine
WO2011029666A1 (de) * 2009-09-08 2011-03-17 Schaeffler Technologies Gmbh & Co. Kg Baueinheit für einen ventiltrieb einer brennkraftmaschine
US20110253088A1 (en) * 2010-04-15 2011-10-20 Schaeffler Technologies Gmbh & Co. Kg Structural unit for a gas exchange valve train of an internal combustion engine
DE102011005575A1 (de) * 2011-03-15 2012-09-20 Schaeffler Technologies Gmbh & Co. Kg Ventiltrieb mit Zusatzhub im Nockengrundkreis
DE102013010507A1 (de) * 2012-06-22 2013-12-24 Hitachi Automotive Systems, Ltd. Variabel betätigtes Ventilsystem für einen Verbrennungsmotor
EP2767685A1 (de) * 2013-02-15 2014-08-20 Otics Corporation Spielausgleichselement

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DE6752066U (de) * 1968-05-16 1969-10-30 Motomak Sich selbsttaetig hydraulisch einstellendes spielausgleichselement fuer die ventilsteuerung von kolbenbrennkraftmaschinen
FR2712025B1 (fr) * 1993-11-04 1995-12-15 Renault Butée hydraulique pour distribution à soupapes de moteur à combustion interne.
JP3795320B2 (ja) * 2000-11-20 2006-07-12 株式会社ジェイテクト ロッカアーム用クリップ
DE102004041231A1 (de) * 2004-08-26 2006-03-30 Ina-Schaeffler Kg Verbindungselement zur verliersicheren Halterung eines hebelartigen Nockenfolgers

Patent Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861365A (en) * 1971-12-08 1975-01-21 Daimler Benz Ag Mechanism for adjusting and maintaining the valve play in internal combustion engines, especially in motor vehicle internal combustion engines
US4338894A (en) * 1978-04-20 1982-07-13 Aisin Seiki Kabushiki Kaisha Self-contained hydraulic lash adjuster
US4596213A (en) * 1985-06-20 1986-06-24 Eaton Corporation Cap retainer for hydraulic lash adjuster assembly
JPS63113109A (ja) * 1986-10-31 1988-05-18 Fuji Valve Co Ltd バルブラツシユアジヤスタ
US4887566A (en) * 1988-09-30 1989-12-19 Fuji Valve Co., Ltd. Hydraulic valve lash adjuster
JPH0295706A (ja) * 1988-09-30 1990-04-06 Fuji Valve Co Ltd エンドピボットタイプバルブラッシュアジャスタのプランジャの成形方法
WO2006048101A1 (de) * 2004-11-04 2006-05-11 Schaeffler Kg Ventiltrieb einer brennkraftmaschine
US20080196683A1 (en) * 2007-02-16 2008-08-21 Hayman Alan W High performance overhead valvetrain assembly
US20100037845A1 (en) * 2008-08-13 2010-02-18 Schaeffler Kg Hydraulic support element for a switchable cam follower of a valve drive of an internal combustion engine
US20100071649A1 (en) * 2008-09-23 2010-03-25 Eaton Corporation Ball plunger for use in a hydraulic lash adjuster and method of making same
US20100229811A1 (en) * 2009-03-12 2010-09-16 Schaeffler Technologies Gmbh & Co. Kg Switchable component of a valve train of an internal combustion engine
DE102009040608A1 (de) * 2009-09-08 2011-03-10 Schaeffler Technologies Gmbh & Co. Kg Baueinheit für einen Ventiltrieb einer Brennkraftmaschine
WO2011029666A1 (de) * 2009-09-08 2011-03-17 Schaeffler Technologies Gmbh & Co. Kg Baueinheit für einen ventiltrieb einer brennkraftmaschine
WO2011029667A1 (de) * 2009-09-08 2011-03-17 Schaeffler Technologies Gmbh & Co. Kg Baueinheit für einen ventiltrieb einer brennrkaftmaschine
US20110253088A1 (en) * 2010-04-15 2011-10-20 Schaeffler Technologies Gmbh & Co. Kg Structural unit for a gas exchange valve train of an internal combustion engine
DE102011005575A1 (de) * 2011-03-15 2012-09-20 Schaeffler Technologies Gmbh & Co. Kg Ventiltrieb mit Zusatzhub im Nockengrundkreis
DE102013010507A1 (de) * 2012-06-22 2013-12-24 Hitachi Automotive Systems, Ltd. Variabel betätigtes Ventilsystem für einen Verbrennungsmotor
EP2767685A1 (de) * 2013-02-15 2014-08-20 Otics Corporation Spielausgleichselement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170067374A1 (en) * 2014-04-29 2017-03-09 Schaeffler Technologies AG & Co. KG Component of a valve drive of an internal combustion engine
US10006318B2 (en) * 2014-04-29 2018-06-26 Schaeffler Technologies AG & Co. KG Component of a valve drive of an internal combustion engine

Also Published As

Publication number Publication date
CN103422924A (zh) 2013-12-04
CN103422924B (zh) 2017-06-27
DE102012208238A1 (de) 2013-11-21

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

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE PROPERTY NUMBERS PREVIOUSLY RECORDED ON REEL 037732 FRAME 0347. ASSIGNOR(S) HEREBY CONFIRMS THE APP. NO. 14/553248 SHOULD BE APP. NO. 14/553258;ASSIGNOR:SCHAEFFLER TECHNOLOGIES GMBH & CO. KG;REEL/FRAME:040404/0530

Effective date: 20150101

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION