US3805753A - Hydraulic lash adjuster for overhead cam engines - Google Patents

Hydraulic lash adjuster for overhead cam engines Download PDF

Info

Publication number
US3805753A
US3805753A US00229157A US22915772A US3805753A US 3805753 A US3805753 A US 3805753A US 00229157 A US00229157 A US 00229157A US 22915772 A US22915772 A US 22915772A US 3805753 A US3805753 A US 3805753A
Authority
US
United States
Prior art keywords
cavity
valve
outlet
seat
ball
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
US00229157A
Other languages
English (en)
Inventor
P Bergmann
D Coates
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.)
Sealed Power Technologies LP
Kodiak Partners Corp
Johnson Products Inc
Original Assignee
Johnson Products Inc
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 Johnson Products Inc filed Critical Johnson Products Inc
Priority to US00229157A priority Critical patent/US3805753A/en
Priority to CA158,595A priority patent/CA976442A/en
Priority to AU50055/72A priority patent/AU463616B2/en
Priority to GB5799372A priority patent/GB1357080A/en
Priority to IT33293/72A priority patent/IT972668B/it
Priority to DE2300467A priority patent/DE2300467A1/de
Priority to JP48004629A priority patent/JPS4912224A/ja
Priority to FR7303945A priority patent/FR2173526A5/fr
Priority to BR73866A priority patent/BR7300866D0/pt
Application granted granted Critical
Publication of US3805753A publication Critical patent/US3805753A/en
Assigned to SPX CORPORATION, A CORP. OF DE. reassignment SPX CORPORATION, A CORP. OF DE. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: SEALED POWER CORPORATION, A CORP. OF DE. (CHANGED TO), SPAR CORPORATION, A CORP. OF DE (MERGED INTO)
Assigned to KODIAK PARTNERS CORP., A CORP. OF DE reassignment KODIAK PARTNERS CORP., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SPX CORPORATION, A DE CORP.
Assigned to CHEMICAL BANK reassignment CHEMICAL BANK SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SEALED POWER, TECHNOLOGIES, L.P., A DE LIMITED PARTNERSHIP
Assigned to CHEMICAL BANK, A NEW YORK BANKING CORP., AS AGENT reassignment CHEMICAL BANK, A NEW YORK BANKING CORP., AS AGENT SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SEALED POWER TECHNOLOGIES, L.P.
Assigned to SEALED POWER TECHNOLOGIES, L.P. reassignment SEALED POWER TECHNOLOGIES, L.P. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KODIAK PPARTNERS CORP.
Assigned to SEALED POWER TECHNOLOGIES, L.P. reassignment SEALED POWER TECHNOLOGIES, L.P. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). 6/20/89, DE Assignors: SEALED POWER TECHNOLOGIES, L.P.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F01L1/20—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

  • Oil within a central cavity formed in the piston passes through the top of the piston to lubricate a socket between a rocker arm and the adjuster.
  • An outlet from the cavity to the top of the piston includes a valve means having a ball and a seat for the ball, the valve being in an open position in the presence of air within the cavity and closed by the oil after the air has been vented to thereby prevent air from remaining in the cavity.
  • oil within the lash adjuster drains admitting air to the oil reservoir cavity. Since air is compressible and the oil is not, when the engine is started, the oil and air mixes, the air is compressed, and the lash adjuster will not quickly automatically adjust itself to a no-lash condition thereby resulting in noisy operation until the air has been eliminated from the lash adjuster so that it can operate in a conventional fashion.
  • This invention relates to a hydraulic lash adjuster having a ball valve positioned in its central cavity to control an oil outlet means in the piston for lubricating the connection between the piston and the rocker arm in an internal combustion engine.
  • the novel valve means remains in an open position when air is present in the chamber to allow the air to vent and automatically closes when the oil within the chamber has reached a predetermined level.
  • means are provided within the valve to allow a metered amount of oil to pass through the outlet to lubricate the socket of the rocker arm.
  • the plunger can be machined from a single elongated piece of material, the central cavity, the valve, and the outlet opening extending along its length through its medial axis;
  • the adjuster of the present invention includes a minimal number of relatively inexpensive and simple-to-machine parts; it is readily and easily assembled resulting, in significantly reduced material and. manufacturing costs.
  • FIG. 1 is a schematic representation of an overhead cam valve train having a hydraulic lash adjuster according to the invention
  • FIG. 2 is an enlarged, cross-sectional view of the lash adjuster shown in FIG. 1;
  • FIG. 3 is a cross-sectional view taken along the plane III-III of FIG. 2;
  • FIG. 4 is a cross-sectional view illustrating an alternate embodiment of the retaining means as shown in FIG. 3;
  • FIG. 5 is a cross-sectional view taken along the plane V-V of FIG. 2;
  • FIG. 6 is a view similar to FIG. 5 illustrating an alternate lubricating oil metering means suitable for-use in the present invention.
  • FIG. 7 is an enlarged, sectional view of an alternate embodiment of the hydraulic lash adjuster illustrated in FIG. 2.
  • a valve 2 having a spring 4 and retainer 6 is actuated by a rocker arm 8 through a cam shaft 10 and cam 1.2.
  • the rocker arm 8 pivots about a socket 14 on a lash adjuster 16.
  • the lash adjuster which automatically adjusts for zero or no-lash includes a body 18 with a plunger or piston 20 movable therein.
  • the plunger 20 is biased in the upward position against the socket 14 of rocker arm 8 by a spring 22.
  • the plunger 20 has an internal cavity 24 which opens into a bottom compression chamber 26 through check valve plate 28.
  • a spring 30 biases valve plate 28 against a bottom opening 32 of plunger 20.
  • a valve retainer, or cage, 34 which holds the check valve assembly in place is held against the body of plunger 20 by spring 22.
  • Lubricating oil enters cavity 24 through port 36 in the side wall of the body 18 and port 38 in the side wall of plunger 20. As is conventional in hydraulic lash adjustment assemblies, the oil passes through cavity 24, through the bottom opening 32 of the plunger 20, and into the bottom compression chamber 26.
  • the reciprocal motion of the plunger 20 is limited at the lower extremity by shoulder 40 and at the upper extremity by splitting retainer 42 positioned in annular groove 44.
  • a bore or oil outlet port 47 is provided in communication with the central cavity 24 within the plunger 20.
  • the piston or plunger body 20 can be conveniently formed in one piece with the cavity 24 and the outlet port 47 being conveniently machined from the open end 32.
  • Cavity 24 has a diameter slightly larger than the diameter of the outlet port 47 and a valve seat 48 is formed at the upper extremity of the cavity at the entrance to the outlet port.
  • a ball valve 50 positioned within the cavity is adapted to move into the valve seat 48 to restrict the flow of lubricating oil from the chamber 24 through the outlet port 47.
  • the ball 50 is held in position within the cavity 24 by retaining means 52 (see also, FIG. 3) extending through the inlet port 38 and holding the ball valve 50 closely adjacent but not in actual contact with the valve seat 48.
  • the retaining means 52 is in the form of a spring clip wrapped about the plunger 20 in a depression 54 formed in its outer diameter. An inwardly extending end 56 of the spring clip passes through the port 38 and enters partially into the cavity 24.
  • FIG. 4 An alternate retainer is illustrated in FIG. 4, wherein the retaining means may be in the form of a hollow roll pin 58 pressed into the inlet port 38 and extending partially into the cavity 24 a distance sufficient to hold the ball 50 in position below the valve seat 48.
  • the hollow center of the roll pin will, allow the lubricating oil to flow from the port 36 through the hollow pin into the cavity 24.
  • a limited amount of oil is metered from the cavity 24 to the outlet port past the ball 50 and seat 48 to lubricate the head of the plunger and the socket 14. This is accomplished by means of a small metering slot 60 (FIG. extending from the cavity 24 into the outlet port 47 through a side wall of the valve seat 48. When the ball valve is closed, the metering slot 60 allows a limited amount of oil to flow about the ball 50 from the cavity 24 through the outlet port 47.
  • FIG. 6 An alternate embodiment of a'metering mechanism is illustrated in FIG. 6.
  • an apertured disk 62 having the shape of an elipse is positioned within the cavity 24 adjacent its intersection with the outlet port 47.
  • the major axis of the elipse is slightly greater than the diameter of the cavity 24 such that when the disk is pressed into the bore of the cavity, it is warped slightly.
  • the minor axis of the elipse pulls slightly from the walls of the cavity to thereby allow a slight oil flow about the disk.
  • lubricating oil which serves as the hydraulic fluid for the adjuster is delivered as part of the engine lubrication system through a conventional oil gallery in the engine head (not shown).
  • the oil passes from the gallery through port 36 into annular groove 54 and port 38 into the cavity 24.
  • the oil also flows into the compression chamber 26 below check valve 28.
  • Pressure is normally maintained for lubrication through the outlet port 47 in a conventional manner by incoming engine oil under pressure supplied by the engines oil pump.
  • oil in the compression chamber 26 and cavity 24 may gradually escape by normal leakage.
  • a quantity of air may be trapped in the cavity 24 or compression chamber 26 and unless immediately eliminated, noisy operation of the adjuster and perhaps damage will result.
  • the ball valve 50 therefore, remains in an open position with respect to the seat 48 such that air is vented from the cavity 24 through the outlet port 47 as the engine is started.
  • the oil pressure builds up and the level of oil raises within the cavity 24, the normal pressure and flow of the oil will move the ball 50 into the valve seat 48 thereby closing the valve and allowing only a controlled metered amount of oil flow through the slot 60 and the outlet port 47 for lubrication of the rocker arm socket.
  • FIG. 7 an alternate embodiment of a lash adjuster is illustrated.
  • the construction of the adjuster is similar to that as shown in connection with FIG. 2. The difference resides primarily in the construction and operation of the ball check valve.
  • no retaining means is necessary within the chamber as the chamber 24 confines the ball, and restricts its movement upwardly and downwardly within the chamber.
  • Like reference numerals are therefore used to indicate like parts and only an explanation of the valve and its operation within the chamber will be provided.
  • the ball valve 50' is illustrated in two positions.
  • the uppermost position shown in solid lines indicates a closed position wherein the ball is positioned against the valve seat 48.
  • the lowermost position is indicated in phantom such as would be assumed if all the oil has drained from cavity 24.
  • This embodiment does not require a retaining means as the embodiment shown in FIG. 2 since the ball is free to move within the cavity 24.
  • the ball 50 is constructed such that it floats on the oil within the cavity. This may be accomplished by using a hollow ball or by forming the ball of a lightweight material such as a plastic having a specific gravity less than that of the oil such that it floats thereon.
  • a metering slot similar to slot shown in FIG. 2 may be provided in this embodimentto allow a limited oil flow about the ball 50' through the outlet port 47.
  • the hydraulic lash adjuster of the present invention is particularly adaptable for maximum efficiency of operation. It will prevent noisy operation and damage in its provision for bleeding air from the chamber and yet will provide adequate lubrication for the rocker arm as it meters a controlled amount of oil.
  • the lash adjuster will further automatically adjust itself to a nolash condition by the unique operation of the valve as soon as the air is eliminated.
  • the simplicity of construction of the cavity, outlet port, and valve seat make it particularly adaptable for quantity production and assembly. The simple construction further contributes to substantial reduction in manufacturing and assembly costs.
  • the ball check valve utilized in the embodiment shown is extremely simple, exceedingly durable, and dependable in operation.
  • a hydraulic lash adjuster having a body, a plunger reciprocal within said body, said plunger having a central cavity and an outlet passage extending axially along its length, a lubricating oil inlet means in said body and said plunger communicating with said central cavity, valve means in said cavity and said outlet means for bleeding air from said cavity and controlling the flow of lubricating oil through said outlet means, said valve means including: i
  • a ball check valve in said cavity, means for moving said ball valve into an open position with respect to said seat in the presence of air in said chamber and means for moving said ball valve into abutment with said seat in the presence of lubricating oil at said outlet;
  • said ball being hollow and thereby having a specific gravity less than that of said lubricating oil and greater than that of air to thereby float on said lubricating oil for movement with said oil into position in said valve seat after said air has been vented through said outlet.
  • a metering means includes an elongated slot extending from said chamber to said outlet means through said valve seat.
  • a hydraulic lash adjuster having a body, a plunger reciprocal in said body, said plunger having a central cavity and an outlet passage extending axially along its length, a lubricating oil inlet means in said body and said plunger communicating with said central cavity, valve means in said cavity and said outlet means for bleeding air from said cavity and controlling the flow of lubricating oil through said outlet means, said valve including: a valve seat adjacent said outlet opening and said cavity; a ball check valve in said cavity, means for moving said ball valve into an open position with respect to said seat in the presence of air in said chamber and means for moving said ball valve into abutment with said seat in the presence of lubricating oil at said outlet; said plunger being an elongated body having an opening along its axial length, said opening forming said central chamber, said valve seat, and said outlet passage, said inlet means extending transversely through said plunger into said chamber below said seat, said ball positioned between said inlet means and said seat, and retaining means including a hollow roll pin extending through said
  • a metering means includes an elongated slot extending from said chamber to said outlet means through said valve seat.
  • a hydraulic lash adjuster having a body, a plunger reciprocal Within said body, said plunger having a central cavity and an outlet passage extending axially along its length, a lubricating oil inlet means in said body and said plunger communicating with said central cavity, valve means in said cavity and said outlet means for bleeding air from said cavity and controlling the flow of lubricating oil through said outlet means, said valve means including: a valve seat adjacent said outlet opening and said cavity; a ball check valve in said cavity, means for moving said ball valve into an open position with respect to said seat in the presence of air in said chamber and means for moving said ball valve into abutment with said seat in the presence of lubricating oil at said outlet, said valve seat including an eliptically shaped disk having an aperture therein positioned within said cavity adjacent said outlet means, said disk having a major axis slightly larger than the diameter of said cavity such that theminor axis thereof forms a passage for said lubricating oil when said disk is pressed into said chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
US00229157A 1972-02-24 1972-02-24 Hydraulic lash adjuster for overhead cam engines Expired - Lifetime US3805753A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US00229157A US3805753A (en) 1972-02-24 1972-02-24 Hydraulic lash adjuster for overhead cam engines
CA158,595A CA976442A (en) 1972-02-24 1972-12-11 Hydraulic lash adjuster for overhead cam engines
AU50055/72A AU463616B2 (en) 1972-02-24 1972-12-14 Hydraulic lash adjuster for overhead cam engines
GB5799372A GB1357080A (en) 1972-02-24 1972-12-15 Hydraulic backlash adjusters for overhead cam shaft engines
IT33293/72A IT972668B (it) 1972-02-24 1972-12-20 Dispositivo idraulico di regola zione dei giochi per motori a camme in testa
JP48004629A JPS4912224A (ja) 1972-02-24 1973-01-05
DE2300467A DE2300467A1 (de) 1972-02-24 1973-01-05 Hydraulische ventilspieleinstellung fuer brennkraftmaschinen mit oben liegender nockenwelle
BR73866A BR7300866D0 (pt) 1972-02-24 1973-02-05 Ajustador hidraulico de folga de valvulas
FR7303945A FR2173526A5 (ja) 1972-02-24 1973-02-05

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00229157A US3805753A (en) 1972-02-24 1972-02-24 Hydraulic lash adjuster for overhead cam engines

Publications (1)

Publication Number Publication Date
US3805753A true US3805753A (en) 1974-04-23

Family

ID=22860047

Family Applications (1)

Application Number Title Priority Date Filing Date
US00229157A Expired - Lifetime US3805753A (en) 1972-02-24 1972-02-24 Hydraulic lash adjuster for overhead cam engines

Country Status (9)

Country Link
US (1) US3805753A (ja)
JP (1) JPS4912224A (ja)
AU (1) AU463616B2 (ja)
BR (1) BR7300866D0 (ja)
CA (1) CA976442A (ja)
DE (1) DE2300467A1 (ja)
FR (1) FR2173526A5 (ja)
GB (1) GB1357080A (ja)
IT (1) IT972668B (ja)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098240A (en) * 1975-02-18 1978-07-04 Eaton Corporation Valve gear and lash adjustment means for same
US4387675A (en) * 1980-01-28 1983-06-14 Aisin Seiki Kabushiki Kaisha Engine valve actuating mechanism having a hydraulic fulcrum lifting device
US4438739A (en) * 1980-03-06 1984-03-27 Aisin Seiki Kabushiki Kaisha Hydraulic lash adjuster
US4598674A (en) * 1984-01-13 1986-07-08 Toyota Jidosha Kabushiki Kaisha Rocker arm spring for a valve actuating mechanism of an internal combustion engine
US4856468A (en) * 1987-07-30 1989-08-15 Ina Walzlager Schaeffler Kg Ball-and-socket joint
US5509385A (en) * 1995-06-15 1996-04-23 Precision Engine Products Corp. Hydraulic lash adjuster metering valve
US5931132A (en) * 1998-08-24 1999-08-03 Freeland; Mark Hydraulic lash adjuster with pressure relief check valve
US5964193A (en) * 1998-08-20 1999-10-12 Ford Global Technologies, Inc. Synchronous hydraulic lash adjuster
US5967105A (en) * 1998-08-24 1999-10-19 Ford Global Technologies, Inc. Hydraulic lash adjuster with an open ended top plunger surface
US6006710A (en) * 1998-08-31 1999-12-28 Ford Global Technologies, Inc. Hydraulic lash adjuster mechanism with pressure controlled leak down
US6491012B2 (en) 2000-09-13 2002-12-10 Toledo Technologies Inc. Rocker arm assembly having a spring clip valve guide
US20040074462A1 (en) * 2002-10-18 2004-04-22 Dhruva Mandal Lash adjuster body
US20040154571A1 (en) * 2002-10-18 2004-08-12 Dhruva Mandal Roller Follower assembly
US20050092277A1 (en) * 2000-11-14 2005-05-05 Fev Motorentechnik Gmbh Mechanical valve play compensation element for a valve drive on a piston combustion engine
US20140216378A1 (en) * 2013-02-04 2014-08-07 GM Global Technology Operations LLC Stationary hydraulic lash adjuster and roller finger follower assembly clip, and method thereof

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5245783A (en) * 1975-10-07 1977-04-11 Shindengen Electric Mfg Co Ltd Power source device for electric dust collector
US4184464A (en) * 1977-05-13 1980-01-22 Stanadyne, Inc. Recirculation groove for hydraulic lash adjuster
DE2911550C2 (de) * 1978-03-23 1982-12-23 Aisin Seiki K.K., Kariya, Aichi Ventilspiel-Ausgleichsvorrichtung
JPS5852322Y2 (ja) * 1980-04-15 1983-11-29 カスヤ精工株式会社 プッシュロッドの衝圧体を有するオイル内蔵式タペットにおける衝圧体のまわり止め装置
IT8253761V0 (it) * 1982-10-05 1982-10-05 Riv Officine Di Villar Perosa Dispositivo compensatore di gioco atto ad essere inserito in una catena cinematica per il comando di una valvola di un motore endotermico
US4481913A (en) * 1982-12-20 1984-11-13 General Motors Corporation Hydraulic lash adjuster oil metering ball valve
JPS60131605U (ja) * 1984-02-13 1985-09-03 トヨタ自動車株式会社 油圧リフタ内蔵ロツカア−ム
JPH02135748U (ja) * 1989-04-17 1990-11-13
DE102005029831A1 (de) 2004-07-23 2006-03-16 Ina-Schaeffler Kg Hydraulisches Ventilspielausgleichselement (HVA)
DE102012215869A1 (de) * 2012-09-07 2014-03-13 Schaeffler Technologies AG & Co. KG Ventiltrieb für eine Brennkraftmaschine
DE102016002513B4 (de) * 2016-03-02 2017-12-28 Audi Ag Hydraulisches Ventilspielausgleichselement für einen Ventiltrieb einer Brennkraftmaschine, entsprechender Ventiltrieb sowie Verfahren zum Betreiben eines Ventiltriebs
DE102016124579B3 (de) 2016-12-16 2018-05-03 Schaeffler Technologies AG & Co. KG Autonomes hydraulisches Abstützelement

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1798938A (en) * 1927-04-25 1931-03-31 Gen Motors Res Corp Hydraulic slack adjuster
US2818844A (en) * 1956-09-13 1958-01-07 Wood George Hydraulic lash adjusters
US2954015A (en) * 1958-10-23 1960-09-27 Eaton Mfg Co Lubricant delivery control
US2964027A (en) * 1958-03-19 1960-12-13 Johnson Products Inc Valve for metering lubricating oil from a hydraulic tappet to a hollow push rod
US3054392A (en) * 1960-03-24 1962-09-18 Earl A Thompson Metering valve
US3109418A (en) * 1962-02-23 1963-11-05 William C Exline Hydraulic valve push rod assembly
US3124114A (en) * 1964-03-10 Voorhies
US3144010A (en) * 1962-08-17 1964-08-11 Gen Motors Corp Push rod with ball check valve
US3153404A (en) * 1963-12-30 1964-10-20 Gen Motors Corp Hydraulic lash adjuster
US3587539A (en) * 1970-04-17 1971-06-28 Johnson Products Inc Hydraulic lash adjuster

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3439659A (en) * 1967-05-09 1969-04-22 Standard Screw Spiral metering valve
US3439660A (en) * 1967-05-19 1969-04-22 Standard Screw Tappet metering disk
US3636932A (en) * 1970-05-18 1972-01-25 Stanadyne Inc Tappet with means for relieving entrained air

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124114A (en) * 1964-03-10 Voorhies
US1798938A (en) * 1927-04-25 1931-03-31 Gen Motors Res Corp Hydraulic slack adjuster
US2818844A (en) * 1956-09-13 1958-01-07 Wood George Hydraulic lash adjusters
US2964027A (en) * 1958-03-19 1960-12-13 Johnson Products Inc Valve for metering lubricating oil from a hydraulic tappet to a hollow push rod
US2954015A (en) * 1958-10-23 1960-09-27 Eaton Mfg Co Lubricant delivery control
US3054392A (en) * 1960-03-24 1962-09-18 Earl A Thompson Metering valve
US3109418A (en) * 1962-02-23 1963-11-05 William C Exline Hydraulic valve push rod assembly
US3144010A (en) * 1962-08-17 1964-08-11 Gen Motors Corp Push rod with ball check valve
US3153404A (en) * 1963-12-30 1964-10-20 Gen Motors Corp Hydraulic lash adjuster
US3587539A (en) * 1970-04-17 1971-06-28 Johnson Products Inc Hydraulic lash adjuster

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098240A (en) * 1975-02-18 1978-07-04 Eaton Corporation Valve gear and lash adjustment means for same
US4387675A (en) * 1980-01-28 1983-06-14 Aisin Seiki Kabushiki Kaisha Engine valve actuating mechanism having a hydraulic fulcrum lifting device
US4438739A (en) * 1980-03-06 1984-03-27 Aisin Seiki Kabushiki Kaisha Hydraulic lash adjuster
US4598674A (en) * 1984-01-13 1986-07-08 Toyota Jidosha Kabushiki Kaisha Rocker arm spring for a valve actuating mechanism of an internal combustion engine
US4856468A (en) * 1987-07-30 1989-08-15 Ina Walzlager Schaeffler Kg Ball-and-socket joint
US5509385A (en) * 1995-06-15 1996-04-23 Precision Engine Products Corp. Hydraulic lash adjuster metering valve
US5964193A (en) * 1998-08-20 1999-10-12 Ford Global Technologies, Inc. Synchronous hydraulic lash adjuster
US5967105A (en) * 1998-08-24 1999-10-19 Ford Global Technologies, Inc. Hydraulic lash adjuster with an open ended top plunger surface
US5931132A (en) * 1998-08-24 1999-08-03 Freeland; Mark Hydraulic lash adjuster with pressure relief check valve
US6006710A (en) * 1998-08-31 1999-12-28 Ford Global Technologies, Inc. Hydraulic lash adjuster mechanism with pressure controlled leak down
US6491012B2 (en) 2000-09-13 2002-12-10 Toledo Technologies Inc. Rocker arm assembly having a spring clip valve guide
US20050092277A1 (en) * 2000-11-14 2005-05-05 Fev Motorentechnik Gmbh Mechanical valve play compensation element for a valve drive on a piston combustion engine
US7146953B2 (en) * 2000-11-14 2006-12-12 Fev Motorentechnik Gmbh Mechanical valve play compensation element for a valve drive on a piston combustion engine
US20040074462A1 (en) * 2002-10-18 2004-04-22 Dhruva Mandal Lash adjuster body
US20040154571A1 (en) * 2002-10-18 2004-08-12 Dhruva Mandal Roller Follower assembly
US20140216378A1 (en) * 2013-02-04 2014-08-07 GM Global Technology Operations LLC Stationary hydraulic lash adjuster and roller finger follower assembly clip, and method thereof
US9091187B2 (en) * 2013-02-04 2015-07-28 GM Global Technology Operations LLC Stationary hydraulic lash adjuster and roller finger follower assembly clip, and method thereof

Also Published As

Publication number Publication date
DE2300467A1 (de) 1973-08-30
GB1357080A (en) 1974-06-19
AU5005572A (en) 1974-06-20
CA976442A (en) 1975-10-21
JPS4912224A (ja) 1974-02-02
BR7300866D0 (pt) 1973-10-11
FR2173526A5 (ja) 1973-10-05
IT972668B (it) 1974-05-31
AU463616B2 (en) 1975-07-31

Similar Documents

Publication Publication Date Title
US3805753A (en) Hydraulic lash adjuster for overhead cam engines
US3509858A (en) Overhead cam valve lifter
US4133332A (en) Valve control mechanism
US3875908A (en) Valve gear and lash adjuster for same
US3314404A (en) Engine valve operating mechanism
US3304925A (en) Hydraulic valve lifter
US3490423A (en) Variable stroke hydraulic valve lifter
US4098240A (en) Valve gear and lash adjustment means for same
GB1126269A (en) Internal combustion engine brake
US4941438A (en) Hydraulic valve-lash adjuster
US4228771A (en) Lash adjustment means for valve gear of an internal combustion engine
US3799129A (en) Hydraulic lash adjuster oil metering means
US3273548A (en) Hydraulic lash adjuster
CN112912596B (zh) 空动可变气门致动系统和方法
JPH0452367B2 (ja)
US3450228A (en) Hydraulic valve lifter
US2818050A (en) Lubricating system
US3678906A (en) Damped valve train system
US4009696A (en) Hydraulic lash adjuster with internal oil pressure control
US2676579A (en) Hydraulic adjuster for engine valves
JPS58113511A (ja) 油圧ラツシユアジヤスタ
US3877446A (en) Hydraulic valve lifter
EP0953734B1 (en) Hydraulic lash adjuster and check valve opening arrangement therefor
US4554895A (en) Hydraulic lifter for internal combustion engines
US2954015A (en) Lubricant delivery control

Legal Events

Date Code Title Description
AS Assignment

Owner name: SPX CORPORATION, A CORP. OF DE.

Free format text: MERGER;ASSIGNORS:SPAR CORPORATION, A CORP. OF DE (MERGED INTO);SEALED POWER CORPORATION, A CORP. OFDE. (CHANGED TO);REEL/FRAME:005164/0083

Effective date: 19880425

AS Assignment

Owner name: KODIAK PARTNERS CORP., A CORP. OF DE, MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SPX CORPORATION, A DE CORP.;REEL/FRAME:005125/0002

Effective date: 19890525

AS Assignment

Owner name: CHEMICAL BANK, NEW YORK

Free format text: SECURITY INTEREST;ASSIGNOR:SEALED POWER, TECHNOLOGIES, L.P., A DE LIMITED PARTNERSHIP;REEL/FRAME:005094/0360

Effective date: 19890530

AS Assignment

Owner name: CHEMICAL BANK, A NEW YORK BANKING CORP., AS AGENT

Free format text: SECURITY INTEREST;ASSIGNOR:SEALED POWER TECHNOLOGIES, L.P.;REEL/FRAME:005106/0271

Effective date: 19890530

AS Assignment

Owner name: SEALED POWER TECHNOLOGIES, L.P., MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KODIAK PPARTNERS CORP.;REEL/FRAME:005208/0100

Effective date: 19890525

AS Assignment

Owner name: SEALED POWER TECHNOLOGIES, L.P.

Free format text: CHANGE OF NAME;ASSIGNOR:SEALED POWER TECHNOLOGIES, L.P.;REEL/FRAME:005134/0125

Effective date: 19890607