US3455178A - Automatic hydraulic driving chain tensioning device - Google Patents

Automatic hydraulic driving chain tensioning device Download PDF

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Publication number
US3455178A
US3455178A US666341A US3455178DA US3455178A US 3455178 A US3455178 A US 3455178A US 666341 A US666341 A US 666341A US 3455178D A US3455178D A US 3455178DA US 3455178 A US3455178 A US 3455178A
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US
United States
Prior art keywords
cylinder
piston
storage tank
adjusting member
engine housing
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.)
Expired - Lifetime
Application number
US666341A
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English (en)
Inventor
Karl Ruoff
Walter Mittermeier
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
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Publication of US3455178A publication Critical patent/US3455178A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • 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
    • F01L1/02—Valve drive
    • 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
    • F01L1/02—Valve drive
    • F01L1/022—Chain drive
    • 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
    • F01L1/02—Valve drive
    • F01L1/024—Belt drive
    • 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
    • F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
    • F01L2003/25—Valve configurations in relation to engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/08—Endless member is a chain
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • F02B75/18—Multi-cylinder engines
    • F02B75/24—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type
    • F02B75/243—Multi-cylinder engines with cylinders arranged oppositely relative to main shaft and of "flat" type with only one crankshaft of the "boxer" type, e.g. all connecting rods attached to separate crankshaft bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0802—Actuators for final output members
    • F16H2007/0806—Compression coil springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
    • F16H2007/0859—Check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/0872—Sliding members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0891—Linear path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0893—Circular path

Definitions

  • Hydraulic tension adjusting members are known for tensioning drive chains and the like. It is known to provide a piston slideably mounted within the engine housing under the action of a compression spring. The storage tank for the pressure fluid is also constructed as a part of the engine housing.
  • This prior art construction presents considerable casting difiiculties in the manufacture of the engine housing, which are increased when, -for example, a number of chains are to be tensioned for engines having rows of cylinders.
  • the tension spring is arranged within the working chamber of the piston-cylinder, the required length of the adjusting member is greatly increased, which is a considerable disadvantage.
  • Another disadvantage is that the assembly and venting of the adjusting member is quite difficult to accomplish.
  • an object of the present invention to provide an adjusting member having a short length, which is easily alignable with the drive chain and is connected between the drive chain or the like and the engine housing for easy replacement.
  • the piston and cylinder are each provided with substantially identical connecting members for pivotal or universal connection between a stationary bearing in the engine housing and the glide member contacting the drive chain.
  • the hydraulic fluid storage tank and compression spring concentrically States Patent 0 surround the cylinder and piston.
  • a compact adjusting member is provided that is simple in construction and requires only a short axial length for use with both the left and right drive chains of internal combustion engine camshafts having a plurality of rows of cylinders opposed with respect to each other.
  • the piston and the cylinder are provided with cylindrical collars between which the compression spring is mounted and on whichthe connecting members are secured.
  • a further simplification of the construction is obtained when the cylinder collar is provided with a check valve and at the same time is secured to the tubular member forming the storage tank.
  • universal ball and socket joints may'be provided for connecting the cylinder and piston between the guide element and the engine housing.
  • An adjustment for the adjusting member may be provided outside of the engine housing.
  • FIGURE 1 is a side view of an internal combustion engine camshaft drive unit with the adjusting members of the present invention, wherein the engine is provided with oppositely arranged cylinder rows;
  • FIGURE 2 is a partial axial cross-sectional view through the adjusting member on the right side of FIG- URE 1, on an enlarged scale;
  • FIGURE 3 is a partial cross-sectional view taken in the direction of arrow R in FIGURE 2;
  • FIGURE 4 is a partial cross-sectional view of the adjusting member illustrated on the left side of FIGURE 1, on an enlarged scale.
  • the internal combustion engine 1 is provided with cylinder rows arranged oppositely with respect to each other and each having overhead camshafts 2 and 3, respectively, which are driven by the crankshaft 5 at the front end 4 of the engine.
  • the drive chains 6 and 7 form a driving connection between the gears 8 on the crank shaft 5 and the gears 9 and 10 mounted on the camshafts 2 and 3, respectively.
  • the chains 6 and 7 are automatically tensioned by means of the automatic hydraulic adjusting members 11 and 12, respectively, of the present invention that act upon the glide elements 13.
  • Each of the glide elements or glide shoes 13 is pivotally mounted by means of a bolt 14 on the crank case or engine housing and is provided with a chain contacting noise dampening glide surface 15. It is understood that other types of glide shoes may be provided and the adjusting member may act upon belts, or other types of drive elements according to the broader aspects of the present invention.
  • the adjusting member 12 has a piston 16 slideably mounted within a cylinder 17 to be forced relatively apart by means of the concentric coil compression spring 18.
  • the adjusting member 12 is mounted between the glide shoe 13 and an abutment 19 on the crankcase or engine housing.
  • the piston 16 and the cylinder 17 are each provided with substantially identical tongues 20 having transverse bores 21 attached thereto in a single piece construction.
  • the tongue 20 of the piston 16 is provided with an annular collar 22 providing one axial abutment surface for the pressure spring 18.
  • the tongue 20 of the cylinder 17 is also provided with a cylindrical annular collar 23 for forming an abutment surface for the pressure spring 18.
  • the annular collar 23 contains a ball check valve 24, which controls the supply of pressure fluid from the storage tank 25 to the working chamber 26 of the piston-cylinder.
  • the storage tank 25 is formed from a tubular member attached to the annular collar 23 in a cup-shaped manner and extends between the tongues 20 of the piston and cylinder. Therefore, the storage tank concentrically surrounds the pressure spring 18 and the pressure spring 18 concentrically surrounds the piston and cylinder.
  • the tongue 20 of either the piston or cylinder (the piston being shown) is connected to the bearing block 28 of the glide shoe 13 by means of a bolt 27.
  • the remaining one of the tongues 20 (the tongue of the cylinder in FIGURE 2, for example) is connected to a stationary hearing block 17 formed in the engine housing by means of a transverse bolt 29.
  • split rings or the like securing members are attached to the respective bolts and the adjusting member is ready for operation.
  • the pressure spring 18 pushes the piston 16 and cylinder 17 apart in the direction of tensioning the drive chain to thereby take up the slack in the drive chain. With this relative movement, a corresponding vacuum is produced within the working chamber 26 and the ball check valve 24 opens to allow flow of pressure fluid from the storage tank 25 into the working chamber 26. If a kickback of the chain occurs, the ball check valve 24 prevents a return flow of the pressure fluid from the working chamber 26 to the storage tank 25 so that the piston and cylinder are locked in their new adjusted position with respect to each other, although they may freely align themselves with the chain during any kicking or other lateral movement of the chain because of the pivotal connections.
  • the adjusting member 11 for the chain 6 of FIGURE 1 is of the same basic construction as the adjusting member 12 and differs therefrom only with respect to the connections for the piston 16 prime and cylinder 17 prime to the respective glide shoe and engine housing.
  • the associated glid shoe 13 is provided with a ball cup bearing 32 as shown in FIGURE 1, and the engine housing bearing abutment 33 is similarly provided with an opposed ball cup bearing 34 for mounting there between the adjusting member 11.
  • the bearing 34 is formed on a threaded bolt that adjustably and threadably extends through the crankcase or engine housing so that it may be adjusted from the outside and locked in place by means of the lock nut 35.
  • the adjusting member 11 has been shown for use on the left hand side of FIGURE 1 and the adjusting member 12 has been shown for use on the right hand side of FIGURE 1, it would be highly advantageous according to the present invention to construct both glide shoes identical so that they may be interchanged in their positions without modification. That is, with identical connection members, the adjusting members may be mounted in either position by relatively changing the piston or cylinder side with respect to the glide shoe and crank case side, respectively.
  • the adjusting members may be mounted horizontally, with the storage tank closed at each axial end and provided on the upper side with a vent and filling opening.
  • An automatic hydraulic adjusting member for tensioning endless driving devices comprising: a cylinder having an axis; a piston slidably received within said cylinder to constitute an expansible chamber; compression spring means concentrically surrounding said piston and cylinder for resiliently axially urging said piston and cylinder apart in the direction to increase the valume of said expansible chamber; a liquid storage tank concentrically surrounding said piston and cylinder; means providing fluid communication between said storage tank and said xpansible chamber, including a check valve for allowing fluid flow from said storage tank to said expansible chamber and preventing fluid flow from said expansible chamber to said storage tank for effectively hydraulically blocking relative movement between said piston and said cylinder in the direction to further compress said spring; said piston having connecting means on its outer end for drivingly connecting to one of the engine housing and driving device, said cylinder having connecting means on its outer end substantially identical to said first-mentioned connecting means for drivingly connecting said cylinder to the other of the engine housing and driving device; each of said connecting means including a tongue out
  • said adjusting means includes a threaded shaft extending through said housing having driving means at its outer end and the corresponding cup-shaped bearing at its inner end.
  • bearing shoe has one end pivotally mounted to said engine housing and its opposite end substantially perpendicular to said pivotal connection having its cup-shaped bearing therein.
  • said storage tank consists of said tubular wall, the outer wall of said cylinder and tank annular flange to provide an annular filling opening at its upper end opposite from the end having said annular flange;
  • said spring means being a helical spring concentrically mounted within said storage tank, said piston, piston spherical abutment and piston collar being integrally connected together as a single homogeneous piece; said cylinder, cylinder collar and cylinder spherical abutment being homogeneously connected together as a single element;
  • said check valve consisting of a relatively large diameter bore terminating short of the outer surface of said cylinder collar and opening inwardly into said expansible chamber, a second relatively small diameter bore extending through the radially outer wall of said cylinder collar concentrically into 'said relatively large diameter bore, a retainer plate mounted within said relatively large diameter bore to form a check valve chamber with the walls of said relatively large diameter bore and having therein a fluid passage substantially smaller than the effective cross section of said relatively large
  • An automatic hydraulic adjusting member for tensioning endless driving devices comprising: a cylinder having an axis; a piston slideably received within said cylinder to constitute an expansible chamber; compression spring means concentrically surrounding said piston and cylinder for resiliently axially urging said piston and cylinder apart in the direction to increase the volume of said expansible chamber; a liquid storage tank concentrically surrounding said piston and cylinder; means providing fluid communication between said storage tank and said expansible chamber, including a check valve for allowing fluid flow from said storage tank to said expansible chamber and preventing fluid flow from said expansible chamber to said storage tank for eflectively hydraulically blocking relative movement between said piston and said cylinder in the direction to further compress said spring; said piston having connecting means on its outer end for drivingly connecting to one of the engine housing and driving device; said cylinder having connecting means on its outer end substantially identical to said first-mentioned connecting means for drivingly connecting said cylinder to the other of the engin housing and driving device; each of said connecting means including a tongue outwardly
US666341A 1966-10-01 1967-09-08 Automatic hydraulic driving chain tensioning device Expired - Lifetime US3455178A (en)

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Application Number Priority Date Filing Date Title
DEP0040479 1966-10-01

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US3455178A true US3455178A (en) 1969-07-15

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DE (1) DE1550905A1 (de)
GB (1) GB1145780A (de)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527462A (en) * 1983-04-08 1985-07-09 Aisin Seiki Kabushiki Kaisha Sealed-type automatic tensioner
US4543079A (en) * 1979-12-19 1985-09-24 Kubota Ltd. Device for automatically adjusting tension of endless running member in wrapping connector driving
US4553509A (en) * 1983-07-21 1985-11-19 Harley-Davidson Motor Co., Inc. Chain drive of a reciprocating-piston internal combustion engine
US4713043A (en) * 1985-02-26 1987-12-15 Joh. Winklhofer & Sohne Chain tensioner
US4850934A (en) * 1988-06-02 1989-07-25 Moxee Innovations Corporation Stabilized tensioning device for flexible drive element
US6030306A (en) * 1997-08-14 2000-02-29 Cloyes Gear And Products, Inc. Method for chain meshing phasing on a V-engine camshaft drive to reduce noise
US6036612A (en) * 1995-12-27 2000-03-14 Ntn Corporation Hydraulic autotensioner unit having an external spring encircling an actuator cylinder
US6117034A (en) * 1999-06-14 2000-09-12 Poly Hi Solidur Floating flexible drive element tensioner
US6155941A (en) * 1998-12-15 2000-12-05 Borgwarner Inc. Hydraulic tensioner having a flexible blade arm
US20070259744A1 (en) * 2004-09-01 2007-11-08 Lehtovaara Jorma J Tensioner for a Timing Chain
US20070275803A1 (en) * 2006-05-23 2007-11-29 Aft Atlas Fahrzeugtechnik Gmbh Guiding and tensioning device for chain drives
US20100035712A1 (en) * 2008-02-27 2010-02-11 Schaeffler Kg Attachment arrangement for a traction mechanism tensioner
US20100099529A1 (en) * 2008-10-22 2010-04-22 Seiji Sato Chain tensioner
US20140087903A1 (en) * 2012-09-26 2014-03-27 Fuji Jukogyo Kabushiki Kaisha Chain tensioner lever
US20220235851A1 (en) * 2021-01-22 2022-07-28 Borgwarner Inc. Method(s) to apply tension to increase drivetrain jump torque capacity

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57155350U (de) * 1981-03-26 1982-09-29
DE3125077A1 (de) * 1981-06-26 1983-01-13 Bayerische Motoren Werke AG, 8000 München Zweizylinder-viertakt-boxermotor, insbesondere fahrtwindluftgekuehlt fuer motorraeder
US4589382A (en) * 1982-01-08 1986-05-20 Honda Giken Kogyo Kabushiki Kaisha V-type multicylinder internal combustion engine
FR2545193B1 (fr) * 1983-04-29 1986-10-31 Sedis Transmissions Mecaniques Boitier amovible de distribution pour moteur a explosion ou a combustion
DE3347638A1 (de) * 1983-12-30 1985-07-18 Daimler-Benz Ag, 7000 Stuttgart Antrieb fuer zwei im zylinderkopf einer brennkraftmaschine angeordnete nockenwellen mittels eines umschlingungsgetriebes, wie steuerkette oder zahnriemen, von der kurbelwelle aus
DE8710548U1 (de) * 1987-07-31 1987-12-23 Schroeder, Werner, 8157 Dietramszell, De
JP2510338Y2 (ja) * 1988-10-18 1996-09-11 エヌティエヌ 株式会社 ベルトのオ−トテンショナ

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1368652A (en) * 1919-11-13 1921-02-15 Gordon R Pennington Track-belt supporting and tightening mechanism
US1579681A (en) * 1924-12-23 1926-04-06 Weller John Means for transmitting motion
US2256868A (en) * 1940-08-30 1941-09-23 Houde Eng Corp Hydraulic shock absorber control for railway trucks
CH279415A (fr) * 1948-09-09 1951-11-30 Lancia Automobili Tendeur pour organe flexible de transmission mécanique.
DE849938C (de) * 1949-01-25 1952-09-18 Hermann Truempy Selbsttaetiger Spannungsregler fuer den Kettenantrieb der Steuerwellen von Verbrennungskraftmaschinen
US3187674A (en) * 1962-01-16 1965-06-08 Hammelmann Paul Device for regulating contact pressure between driving and driven elements of transmission

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1368652A (en) * 1919-11-13 1921-02-15 Gordon R Pennington Track-belt supporting and tightening mechanism
US1579681A (en) * 1924-12-23 1926-04-06 Weller John Means for transmitting motion
US2256868A (en) * 1940-08-30 1941-09-23 Houde Eng Corp Hydraulic shock absorber control for railway trucks
CH279415A (fr) * 1948-09-09 1951-11-30 Lancia Automobili Tendeur pour organe flexible de transmission mécanique.
DE849938C (de) * 1949-01-25 1952-09-18 Hermann Truempy Selbsttaetiger Spannungsregler fuer den Kettenantrieb der Steuerwellen von Verbrennungskraftmaschinen
US3187674A (en) * 1962-01-16 1965-06-08 Hammelmann Paul Device for regulating contact pressure between driving and driven elements of transmission

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4543079A (en) * 1979-12-19 1985-09-24 Kubota Ltd. Device for automatically adjusting tension of endless running member in wrapping connector driving
US4527462A (en) * 1983-04-08 1985-07-09 Aisin Seiki Kabushiki Kaisha Sealed-type automatic tensioner
US4553509A (en) * 1983-07-21 1985-11-19 Harley-Davidson Motor Co., Inc. Chain drive of a reciprocating-piston internal combustion engine
US4713043A (en) * 1985-02-26 1987-12-15 Joh. Winklhofer & Sohne Chain tensioner
US4850934A (en) * 1988-06-02 1989-07-25 Moxee Innovations Corporation Stabilized tensioning device for flexible drive element
US6036612A (en) * 1995-12-27 2000-03-14 Ntn Corporation Hydraulic autotensioner unit having an external spring encircling an actuator cylinder
US6030306A (en) * 1997-08-14 2000-02-29 Cloyes Gear And Products, Inc. Method for chain meshing phasing on a V-engine camshaft drive to reduce noise
US6155941A (en) * 1998-12-15 2000-12-05 Borgwarner Inc. Hydraulic tensioner having a flexible blade arm
US6447414B1 (en) 1998-12-15 2002-09-10 Borgwarner Inc. Hydraulic tensioner having flexible blade arm
US6117034A (en) * 1999-06-14 2000-09-12 Poly Hi Solidur Floating flexible drive element tensioner
US20070259744A1 (en) * 2004-09-01 2007-11-08 Lehtovaara Jorma J Tensioner for a Timing Chain
US7901309B2 (en) * 2004-09-01 2011-03-08 Litens Automotive Partnership Tensioner for a timing chain
US20070275803A1 (en) * 2006-05-23 2007-11-29 Aft Atlas Fahrzeugtechnik Gmbh Guiding and tensioning device for chain drives
US20100035712A1 (en) * 2008-02-27 2010-02-11 Schaeffler Kg Attachment arrangement for a traction mechanism tensioner
US20100099529A1 (en) * 2008-10-22 2010-04-22 Seiji Sato Chain tensioner
US8393987B2 (en) * 2008-10-22 2013-03-12 Ntn Corporation Chain tensioner
US20140087903A1 (en) * 2012-09-26 2014-03-27 Fuji Jukogyo Kabushiki Kaisha Chain tensioner lever
US9074658B2 (en) * 2012-09-26 2015-07-07 Fuji Jukogyo Kabushiki Kaisha Chain tensioner lever
US20220235851A1 (en) * 2021-01-22 2022-07-28 Borgwarner Inc. Method(s) to apply tension to increase drivetrain jump torque capacity
US11796040B2 (en) * 2021-01-22 2023-10-24 Borgwarner Inc. Method(s) to apply tension to increase drivetrain jump torque capacity

Also Published As

Publication number Publication date
DE1550905A1 (de) 1969-07-17
GB1145780A (en) 1969-03-19

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