WO2010048968A1 - Antirotation device - Google Patents

Antirotation device Download PDF

Info

Publication number
WO2010048968A1
WO2010048968A1 PCT/EP2008/009064 EP2008009064W WO2010048968A1 WO 2010048968 A1 WO2010048968 A1 WO 2010048968A1 EP 2008009064 W EP2008009064 W EP 2008009064W WO 2010048968 A1 WO2010048968 A1 WO 2010048968A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
head section
antirotation
circular
antirotation device
Prior art date
Application number
PCT/EP2008/009064
Other languages
French (fr)
Inventor
Hans-Joachim Buechelmeier
Daniel Jansen
Charles Chambonneau
Torbjorn Hedmann
Romuald Lescorail
Original Assignee
Ab Skf
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 Ab Skf filed Critical Ab Skf
Priority to PCT/EP2008/009064 priority Critical patent/WO2010048968A1/en
Priority to EP08874994A priority patent/EP2347128A1/en
Priority to CN2008801317153A priority patent/CN102203416A/en
Priority to US13/126,413 priority patent/US20120111140A1/en
Publication of WO2010048968A1 publication Critical patent/WO2010048968A1/en

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
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0439—Supporting or guiding means for the pistons
    • 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
    • F01L1/14—Tappets; Push rods
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • 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
    • F01L2301/00—Using particular materials
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • the invention concerns an antirotation device for an element being moveable back and forth along an axis, particularly a periodically actuable tappet for a valve train or a pump.
  • a tappet with a separate antirotation device is e.g. known from DE 195 01 061 Al, whereby the separate antirotation device is a needle or cylindrical roller.
  • the device is substantially mushroom-shaped consisting of one trunk section and one head section, the trunk section is circular-cylindrical-like and designed to be arranged in a circular hole or cavity of said element, particularly of a hollow circular- cylindrical part of said element, and the head section is between a longitudinal cut-off of a circular-like cylinder and a cut-off of a spherical and designed to slide in a guide of a bore surrounding said element.
  • a radially insert excursion of the antirotation device in a hole of the element for the trunk section of the antirotation device is with advantage effectively prevented. Due to the shape of the antirotation device can be manufactured very cost effectively particularly by cold pressing. Also the hole in the element for said trunk section can be produced very cost-effectively due to the circular-cylindrical shape of the hole corresponding to the circular-cylindrical shape of the trunk section.
  • the shape of the head section ensures a good guidance of said element e.g. a cam follower in said bore. Due to the shape of the head section the contact area between the antirotation device and said bore is wide and prevents wear in this contact. Moreover particu- larly if the front sides of the head section are bulged to the outside, these round ends ensure that the antirotation device will not generate scratches in said bore.
  • Figure 1 shows an antirotation device according to a first embodiment of the invention, whereby in the left top a front view is shown, in the right top a side view and in the bottom a perspective view.
  • Figure 2 shows an antirotation device according to a second embodiment of the invention, whereby in the left top a front view is shown, in the right top a side view and in the bottom a perspective view.
  • Figure 3 shows a antirotation device according to a third embodiment of the invention, whereby in the left top a front view is shown, in the right top a side view and in the bottom a perspective view.
  • Figure 1 shows as one example of the invention an antirotation device, which is substantially mushroom- shaped consisting of one trunk section 10 and one head section 20.
  • the trunk section 10 is circular-cylindrical-like and designed to be arranged in a circular hole or cavity of an element being moveable back and forth along an axis, particularly a periodically actuable tappet for a valve train or a pump, particularly of a hollow circular-cylindrical part of said element.
  • the trunk section 10 comprises a frustum-like section 12 at an axial end of the trunk section being away from the head section 20. This makes it easier to insert the trunk section 10 in said hole.
  • the diameter of the circular cylindrical trunk section may be ca. 2,5 mm and its length ca. 2,9 mm.
  • the angle of frustum-like section may be around 10°.
  • the head section 20 is like a longitudinal cut-off of a circular-like cylinder and designed to slide in a guide of a bore surrounding said element. Thereby the head section 20 is bulged to the outside at its front sides 21 and 22 generating rounded longitudinal end sections. This provides good sliding properties in said guide. Further the head section 20 has on top in a longitudinal direction a ridge line 23 and two longitudinal sidelines 24, bordering the cylindrical jacket of the head section 20, whereby the ridge line 23 is longer than the sidelines 24 and the front sides 21 and 22 of the head section 20 are rounded to merge from the ridge line 23 to the sidelines 24.
  • the length of ridge line 23 may be ca. 3 mm, of the sidelines ca. 2,5 and the entire length of the head section ca. 4,9 mm.
  • a ratio being the length of the ridge line 23 divided by the length of the sideline 24 shall be greater than ca. 1, 1 and less than ca. 2.
  • the head section 20 ensures a good guidance of said element in said bore as already mentioned in the paragraph after the solution of the problem.
  • the head section can be flattened in an area of its longitudinal sidelines bordering the cylindrical jacket of the head section as it is shown in figure 2, whereby also the further shape of the head section of the antirotation device of figure 2 is a little bit different compared with the head section 20 of the anti- rotation device of figure 1.
  • the front sides of the head section of the antirotation device of figure 2 are spherically rounded having a plane area in the center of the front sides.
  • the head section can comprise at its underside in a transition area from the cylindrical jacket of the head section to the trunk section at least one, particularly in a longitudinal direction of the head section extending groove being bulged to the inside of the head section as it is shown in figure 3, whereby also the further shape of the head section of the antirotation device of figure 3 is a little bit different compared with the head sections 20 of the antirotation devices of figure 1 and 2.
  • the head section of the antirotation device of figure 3 is a longitudinal half of a cylinder with plane front sides.
  • the head section can also be more like a cut-off of a spherical having the advantage that such an anti- rotation device is axial symmetric with respect to its main axis, so that no predefined alignment between the antirotation device and said element has to be re- spected when mounting the trunk section of the antirotation device in said hole of said element.
  • the trunk section can comprises in a transition area from a circular-cylindrical section of the trunk section to the head section a cuboid-like section, whereby the axial length of said cuboid-like section is multiple shorter than of the circular-cylindrical section, whereby then also the hole for the trunk section in said element is formed accordingly.
  • the antirotation device is produced in a one-piece-design and is made of steel.
  • the antirotation device is manufactured via a cold pressing and/or impact extruding operation which is followed by a hardening operation, particularly a carbonitrating operation.

Landscapes

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

Abstract

An Antirotation device for an element being moveable back and forth along an axis, particularly a periodically actuable tappet for a valve train or a pump, comprises following features: The device is substantially mushroom-shaped consisting of one trunk section and one head section, the trunk section is circular-cylindrical-like and designed to be arranged in a circular hole or cavity of said element, particularly of a hollow circular- cylindrical part of said element, and the head section is between a longitudinal cut-off of a circular-like cylinder and a cut-off of a spherical and designed to slide in a guide of a bore surrounding said element.

Description

D e s c r i p t i o n
Antirotation device
The invention concerns an antirotation device for an element being moveable back and forth along an axis, particularly a periodically actuable tappet for a valve train or a pump.
A tappet with a separate antirotation device is e.g. known from DE 195 01 061 Al, whereby the separate antirotation device is a needle or cylindrical roller.
It is one object of the invention to provide an improved antirotation device for an element being moveable back and forth along an axis, particularly a periodically ac- tuable tappet for a valve train or a pump, which enables a cost-effective manufacturing of the antirotation device itself, but also of a retaining part of said element for the antirotation device and easy mounting.
This problem is solved by subject of claim 1. Beneficial embodiments are described in the dependent claims.
According to claim 1 an antirotation device for an element being moveable back and forth along an axis, particularly a periodically actuable tappet for a valve train or a pump comprises following features: The device is substantially mushroom-shaped consisting of one trunk section and one head section, the trunk section is circular-cylindrical-like and designed to be arranged in a circular hole or cavity of said element, particularly of a hollow circular- cylindrical part of said element, and the head section is between a longitudinal cut-off of a circular-like cylinder and a cut-off of a spherical and designed to slide in a guide of a bore surrounding said element.
Through the generally mushroom-shaped configuration of the antirotation device, a radially insert excursion of the antirotation device in a hole of the element for the trunk section of the antirotation device is with advantage effectively prevented. Due to the shape of the antirotation device can be manufactured very cost effectively particularly by cold pressing. Also the hole in the element for said trunk section can be produced very cost-effectively due to the circular-cylindrical shape of the hole corresponding to the circular-cylindrical shape of the trunk section. The shape of the head section ensures a good guidance of said element e.g. a cam follower in said bore. Due to the shape of the head section the contact area between the antirotation device and said bore is wide and prevents wear in this contact. Moreover particu- larly if the front sides of the head section are bulged to the outside, these round ends ensure that the antirotation device will not generate scratches in said bore.
Further advantages, features and details of the invention are explained in the following examples of the invention with respect to the drawings.
Figure 1 shows an antirotation device according to a first embodiment of the invention, whereby in the left top a front view is shown, in the right top a side view and in the bottom a perspective view. Figure 2 shows an antirotation device according to a second embodiment of the invention, whereby in the left top a front view is shown, in the right top a side view and in the bottom a perspective view.
Figure 3 shows a antirotation device according to a third embodiment of the invention, whereby in the left top a front view is shown, in the right top a side view and in the bottom a perspective view.
Figure 1 shows as one example of the invention an antirotation device, which is substantially mushroom- shaped consisting of one trunk section 10 and one head section 20. The trunk section 10 is circular-cylindrical-like and designed to be arranged in a circular hole or cavity of an element being moveable back and forth along an axis, particularly a periodically actuable tappet for a valve train or a pump, particularly of a hollow circular-cylindrical part of said element. The trunk section 10 comprises a frustum-like section 12 at an axial end of the trunk section being away from the head section 20. This makes it easier to insert the trunk section 10 in said hole. Thereby the diameter of the circular cylindrical trunk section may be ca. 2,5 mm and its length ca. 2,9 mm. The angle of frustum-like section may be around 10°.
The head section 20 is like a longitudinal cut-off of a circular-like cylinder and designed to slide in a guide of a bore surrounding said element. Thereby the head section 20 is bulged to the outside at its front sides 21 and 22 generating rounded longitudinal end sections. This provides good sliding properties in said guide. Further the head section 20 has on top in a longitudinal direction a ridge line 23 and two longitudinal sidelines 24, bordering the cylindrical jacket of the head section 20, whereby the ridge line 23 is longer than the sidelines 24 and the front sides 21 and 22 of the head section 20 are rounded to merge from the ridge line 23 to the sidelines 24. The length of ridge line 23 may be ca. 3 mm, of the sidelines ca. 2,5 and the entire length of the head section ca. 4,9 mm. So a ratio being the length of the ridge line 23 divided by the length of the sideline 24 shall be greater than ca. 1, 1 and less than ca. 2. Particularly the before mentioned design of the head section 20 ensures a good guidance of said element in said bore as already mentioned in the paragraph after the solution of the problem.
In another embodiment the head section can be flattened in an area of its longitudinal sidelines bordering the cylindrical jacket of the head section as it is shown in figure 2, whereby also the further shape of the head section of the antirotation device of figure 2 is a little bit different compared with the head section 20 of the anti- rotation device of figure 1. Thereby the front sides of the head section of the antirotation device of figure 2 are spherically rounded having a plane area in the center of the front sides.
In another embodiment the head section can comprise at its underside in a transition area from the cylindrical jacket of the head section to the trunk section at least one, particularly in a longitudinal direction of the head section extending groove being bulged to the inside of the head section as it is shown in figure 3, whereby also the further shape of the head section of the antirotation device of figure 3 is a little bit different compared with the head sections 20 of the antirotation devices of figure 1 and 2. Thereby the head section of the antirotation device of figure 3 is a longitudinal half of a cylinder with plane front sides. In other embodiment the head section can also be more like a cut-off of a spherical having the advantage that such an anti- rotation device is axial symmetric with respect to its main axis, so that no predefined alignment between the antirotation device and said element has to be re- spected when mounting the trunk section of the antirotation device in said hole of said element.
In another embodiment the trunk section can comprises in a transition area from a circular-cylindrical section of the trunk section to the head section a cuboid-like section, whereby the axial length of said cuboid-like section is multiple shorter than of the circular-cylindrical section, whereby then also the hole for the trunk section in said element is formed accordingly.
The antirotation device is produced in a one-piece-design and is made of steel. The antirotation device is manufactured via a cold pressing and/or impact extruding operation which is followed by a hardening operation, particularly a carbonitrating operation.

Claims

C l a i m sAntirotation device
1. Antirotation device for an element being moveable back and forth along an axis, particularly a periodically actuable tappet for a valve train or a pump, comprising following features:
- The device is substantially mushroom-shaped consisting of one trunk sec- tion and one head section,
- the trunk section is circular-cylindrical-like and designed to be arranged in a circular hole or cavity of said element, particularly of a hollow circular- cylindrical part of said element, and
- the head section is between a longitudinal cut-off of a circular- like cylinder and a cut-off of a spherical and designed to slide in a guide of a bore surrounding said element.
2. Antirotation device according to claim 1, whereby the head section is bulged and/or particularly spherically rounded to the outside at its front sides.
3. Antirotation device according to one of the claims 1 or 2, whereby the head section has on top in a longitudinal direction a ridge line and two longitudinal sidelines bordering the cylindrical jacket of the head section, whereby the ridge line is longer than the sidelines and the front sides of the head section are rounded to merge from the ridge line to the sidelines.
4. Antirotation device according to one of the claims 1 to 3, whereby the head section is flattened in an area of its longitudinal sidelines bordering the cylindrical jacket of the head section.
5. Antirotation device according to one of the claims 1 to 4, whereby the head section comprises at its underside in a transition area from the cylindrical jacket of the head section to the trunk section at least one, particularly in a longitudinal direction of the head section extending groove being bulged to the inside of the head section.
6. Antirotation device according to one of the claims 1 to 5, whereby the trunk section comprises a frustum-like section at an axial end of the trunk section being away from the head section.
7. Antirotation device according to one of the claims 1 to 6, whereby the trunk section comprises in a transition area from a circular-cylindrical section of the trunk section to the head section a cuboid-like section, whereby the axial length of said cuboid- like section is multiple shorter than of the circular- cylindrical section.
8. Antirotation device according to one of the claims 1 to 7, whereby the device is produced in a one-piece-design.
9. Antirotation device according to one of the claims 1 to 8, whereby the device is made of steel.
10. Antirotation device according to one of the claims 1 to 9, whereby the device is cold-pressed.
11. Antirotation device according to one of the claims 1 to 10, whereby the device is impact extruded.
12. Antirotation device according to one of the claims 1 to 11, whereby the device is hardened, particularly after the cold-pressing and/or impact extrusion.
13. Antirotation device according to claim 12, whereby the hardening comprises a carbonitrating.
14. Element being moveable back and forth along an axis, particularly a periodically tappet for a valve train or a pump device, comprising a hollow cylindrical outer body comprising a circular window-type aperture for the antirotation device according to one of the claims 1 to 13, whereby the aperture is corresponding to the circular-cylindrical trunk section of the antirotation device.
15. Element according to claim 14, whereby the antirotation device is retained in the aperture by fixing by one of pressing-in, gluing, welding, soldering or riveting the trunk section.
PCT/EP2008/009064 2008-10-27 2008-10-27 Antirotation device WO2010048968A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/EP2008/009064 WO2010048968A1 (en) 2008-10-27 2008-10-27 Antirotation device
EP08874994A EP2347128A1 (en) 2008-10-27 2008-10-27 Antirotation device
CN2008801317153A CN102203416A (en) 2008-10-27 2008-10-27 Antirotation device
US13/126,413 US20120111140A1 (en) 2008-10-27 2008-10-27 Antirotation Device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/009064 WO2010048968A1 (en) 2008-10-27 2008-10-27 Antirotation device

Publications (1)

Publication Number Publication Date
WO2010048968A1 true WO2010048968A1 (en) 2010-05-06

Family

ID=40751091

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/009064 WO2010048968A1 (en) 2008-10-27 2008-10-27 Antirotation device

Country Status (4)

Country Link
US (1) US20120111140A1 (en)
EP (1) EP2347128A1 (en)
CN (1) CN102203416A (en)
WO (1) WO2010048968A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014083174A1 (en) 2012-11-29 2014-06-05 Aktiebolaget Skf Cam follower having an anti-rotation device
EP2853699A1 (en) 2013-09-27 2015-04-01 Aktiebolaget SKF Tappet, injection pump and valve actuator comprising such a tappet and manufacturing method for such a tappet
EP2853697A1 (en) 2013-09-27 2015-04-01 Aktiebolaget SKF Mechanical system, injection pump and valve actuator comprising such a mechanical system and manufacturing method
DE102010026360B4 (en) * 2010-07-07 2020-12-03 Schaeffler Technologies AG & Co. KG Plunger with an anti-twist device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3668945A (en) * 1969-03-18 1972-06-13 Bosch Gmbh Robert Roller tappet guard
DE19501061A1 (en) 1995-01-16 1996-07-18 Schaeffler Waelzlager Kg Twist-resistant tappet for IC engine valve gear
DE19950989A1 (en) * 1999-10-22 2000-06-21 Schaeffler Waelzlager Ohg Switchable tappet for valve drive of internal combustion engine, with locking device for coupling device
DE10332981A1 (en) 2003-07-21 2005-02-10 Bayerische Motoren Werke Ag Valve tappet unit for internal combustion engine has first and second engagement protrusions each entering allocated radial hole in sleeve section and in direction radial to axis of oscillation
EP1619358A1 (en) 2004-07-24 2006-01-25 INA-Schaeffler KG Periodically actuated tappet for a valve or pump drive
EP1659268A1 (en) * 2004-11-23 2006-05-24 Schaeffler KG Cup-shaped tappet for an internal combustion engine
US20060110273A1 (en) * 2004-11-23 2006-05-25 Shaull Anthony A Fuel pump with a guided tappet assembly and methods for guiding and assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3668945A (en) * 1969-03-18 1972-06-13 Bosch Gmbh Robert Roller tappet guard
DE19501061A1 (en) 1995-01-16 1996-07-18 Schaeffler Waelzlager Kg Twist-resistant tappet for IC engine valve gear
DE19950989A1 (en) * 1999-10-22 2000-06-21 Schaeffler Waelzlager Ohg Switchable tappet for valve drive of internal combustion engine, with locking device for coupling device
DE10332981A1 (en) 2003-07-21 2005-02-10 Bayerische Motoren Werke Ag Valve tappet unit for internal combustion engine has first and second engagement protrusions each entering allocated radial hole in sleeve section and in direction radial to axis of oscillation
EP1619358A1 (en) 2004-07-24 2006-01-25 INA-Schaeffler KG Periodically actuated tappet for a valve or pump drive
EP1659268A1 (en) * 2004-11-23 2006-05-24 Schaeffler KG Cup-shaped tappet for an internal combustion engine
US20060110273A1 (en) * 2004-11-23 2006-05-25 Shaull Anthony A Fuel pump with a guided tappet assembly and methods for guiding and assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010026360B4 (en) * 2010-07-07 2020-12-03 Schaeffler Technologies AG & Co. KG Plunger with an anti-twist device
WO2014083174A1 (en) 2012-11-29 2014-06-05 Aktiebolaget Skf Cam follower having an anti-rotation device
US10260614B2 (en) 2012-11-29 2019-04-16 Aktiebolaget Skf Cam follower with anti-rotation device
EP2853699A1 (en) 2013-09-27 2015-04-01 Aktiebolaget SKF Tappet, injection pump and valve actuator comprising such a tappet and manufacturing method for such a tappet
EP2853697A1 (en) 2013-09-27 2015-04-01 Aktiebolaget SKF Mechanical system, injection pump and valve actuator comprising such a mechanical system and manufacturing method

Also Published As

Publication number Publication date
CN102203416A (en) 2011-09-28
EP2347128A1 (en) 2011-07-27
US20120111140A1 (en) 2012-05-10

Similar Documents

Publication Publication Date Title
US10132208B2 (en) Engine valve lifter oil flow control and anti-rotation feature
US9567901B2 (en) Internal combustion engine and connecting rod
EP2529088B1 (en) Cam follower for actuating a gas exchange valve
WO2010048968A1 (en) Antirotation device
KR101893082B1 (en) Linear actuator
EP1659268B1 (en) Cup-shaped tappet for an internal combustion engine
CN104514656A (en) Mechanical system, injection pump and valve actuator comprising such system and manufacturing method
US20100170360A1 (en) Deflecting device for ball screw device
US8997702B2 (en) Actuator unit with reduced actuator pin friction
EP1669612A3 (en) Linear cylinder unit with locking means
DE102007006320A1 (en) Mechanical roller tappet for an internal combustion engine
CN104514655B (en) Mechanical system, syringe pump and valve actuator and manufacturing method
US7533642B2 (en) Finger lever of a valve train of an internal combustion engine
KR20160004376A (en) Camshaft
BRPI1010032B1 (en) LUBRICATION RECESS OF A CONNECTION BAR
JP2006258136A (en) Ball screw
DE102008062041A1 (en) Adjustable camshaft arrangement
US10260380B2 (en) Locking device for a switchable valve drive component
CN112204244A (en) Tappet for a fuel pump or for a valve actuator
KR20210044269A (en) Two-piece high-strength screw
CN113107631A (en) Bridge part for a valve train of a heavy-duty internal combustion engine
US10584798B2 (en) Valve device
US7350492B2 (en) Guide gib for the valve operating mechanism of an internal combustion engine
US20150354673A1 (en) Chain tensioner
DE10007087C2 (en) Ram bearing assembly for a lever and for a rocker arm and method of manufacturing the same

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200880131715.3

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08874994

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 3067/DELNP/2011

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 2008874994

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 13126413

Country of ref document: US