US3791355A - Mechanical lash adjuster for overhead cam engines - Google Patents

Mechanical lash adjuster for overhead cam engines Download PDF

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Publication number
US3791355A
US3791355A US00229119A US3791355DA US3791355A US 3791355 A US3791355 A US 3791355A US 00229119 A US00229119 A US 00229119A US 3791355D A US3791355D A US 3791355DA US 3791355 A US3791355 A US 3791355A
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US
United States
Prior art keywords
insert
engine
lash adjuster
sleeve
lash
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
US00229119A
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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
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Publication of US3791355A publication Critical patent/US3791355A/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

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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
    • F01L1/20—Adjusting or compensating clearance

Definitions

  • ABSTRACT Mechanical lash adjustment mechanism for use as a direct replacement for a hydraulic lash adjuster in overhead cam engines and the like.
  • the lash adjuster includes a stud threaded into an insert and having means at one end for supporting a rocker arm.
  • the in sert is designed to fit directly into an opening provided in a conventional engine head which opening normally accommodates a hydraulic lash adjuster.
  • the present invention therefore provides a mechanical or solid lash adjustment mechanism adapted for the direct replacement ofa conventional hydraulic lash adjustment mechanism in an overhead cam engine.
  • the adjuster includes a stud member having means at one end thereof for pivotally supporting a rocker arm. The opposite end is threadably received in a tapped sleeve or insert for relative adjustable movement between the sleeve and the stud.
  • the sleeve is adapted for direct placement in the engine head in the opening-normally provided for a hydraulic lash adjuster. Locking means are also provided for holding the sleeve to prevent rotational movement when lash adjustments are made.
  • FIG. 1 is a cross-sectional, somewhat schematic, representation of an overhead cam valve train incorporating a lash adjuster according to the invention
  • FIG. 2 is a partial top plan view of the apparatus shown in FIG. 1 with the rocker arm removed;
  • FIG. 3 is a view illustrating a pair of adjacent lash adjustment mechanisms having retaining means for pre- DESCRIPTION OF THE PREFERRED EMBODIMENT
  • a valve 2 having a spring 4 and a retainer 6 is actuated by rocker arm 8 through a cam shaft I0 and cam 12.
  • the rocker arm 8 pivots about a socket 14 on a lash adjuster 16.
  • a cross sectional portion of the cylinder head of a conventional engine is illustrated by the numeral 20.
  • An opening 22 is provided in the cylinder head 20 and normally accommodates a hydraulic lash adjuster (not shown). Oil is conventionally supplied to the hydraulic lash adjuster through an oil gallery 24 opening into one of the side walls of the recess 22 for operation in a conventional manner well known to those skilled in the art.-
  • the adjuster assembly 16 of the present invention includes a threaded sleeve member or insert 26 adapted for insertion in the opening 22 in the cylinder head 20.
  • the sleeve member 26 has a diameter slightly less than the diameter of the opening 22 such that the sleeve may be easily slipped into place.
  • the sleeve is internally threaded throughout the greatest portion of its length 28 to receive an adjusting screw 30, preferably a selflocking screw.
  • the lower end of the screw 30 is threaded as indicated at 32 for adjustable setting within the threaded portion 28 of the sleeve 26.
  • the upper portion of the screw is provided with a rounded head 34 for rotational engagement with the socket 14 on the rocker arm 8. Below the head and above the threaded portion 32, the screw has machine flat surfaces 36 preferably in the shape of a hexagon for engagement with an open-end wrench during the adjustment thereof.
  • a flat surface 38 is also machined in the outer diameter of the sleeve 26 near the top or opened end portion 40 for engagement with retaining means as will be more fully described hereinafter.
  • FIGS. 3 and 4 a pair of adjacent adjusters are illustrated.
  • the sleeve members 26 are turned within the opening 22 such that flat areas 38 of each sleeve extend along one side thereof in alignment with the Hat areas on the adjacent sleeve.
  • a retaining member 42 having outwardly extending U-shaped arm members 46 thereon is secured to the cylinder head between the adjacent sleeves 26 by means of a screw 44.
  • the arm members 46 extend outwardly and slightly upwardly from the screw 44 and are adapted to engage the machined flat surface 38 on the sleeves 26. Rotational movement of the sleeves within the openings 22 is prevented because of the abutting relationship between the machined flat surfaces 38 and the arm members 46.
  • an alternate retaining means 50 is shown positioned between-a pair of adjacent sleeve members 26.
  • a machined flat surface 38 need only be provided at one side of the sleeve 26 and the sleeves are positioned so that the flat areas are parallel to each other.
  • the retaining member 50 in the shape of a T is positioned centrally between the sleeves 26 such that its outer surfaces contact the machined flat areas 38 of each sleeve to prevent rotation of the sleeve 26 while adjustments are made.
  • Lash adjustment of the rocker arm with respect to the valve stem 2 is accomplished in a conventional manner by utilizing a feeler gauge between the rocker arm 8 and the cam shaft 12.
  • the adjustment itself is accomplished by placing a wrench over the hexagonshaped portion 36 and turning the screw within the sleeve to change the effective length of the screw 30 to thereby adjust the valve lash between the rocker arm 8 and the cam shaft 12.
  • the retaining means illustrated in FIGS. 3 through 6 prevents rotation of the sleeve 26 within the opening 22 while adjustment is made.
  • the threaded portion of the screw 16 is preferably selflocking so that a lock-nut is not required to keep the screw from changing its setting and to require the use of only one wrench.
  • the present invention provides an extremely simple yet effective replacement mechanical lash adjuster for use in overhead cam shaft engines.
  • the mechanical lash adjuster is particularly adaptable for the replacement of a conventional hydraulic lash adjuster in the construction of and conversion to a high-performance engine.
  • the present invention provides a unique retaining means for a lash adjuster wherein relative movement will not occur between the sleeve or insert portion of the adjuster and the cylinder head of the engine.
  • the lash adjuster of the present invention is simple in its construction, inexpensive to manufacture, and consequently, relatively inexpensive to the consumer. lts ease of assembly and insertion within an existing engine effects even greater savings in labor costs alone.
  • a mechanical lash adjuster for replacing a hydraulic lash adjuster in an internal combustion engine having an overhead cam, a rocker arm forming a socket, and a lash adjuster mounted in a smooth surfaced cylindrical opening formed in the cylinder head of the engine supporting said rocker arm at said socket, said replacement mechanical lash adjuster comprising: a freefitting insert axially slideable into and freely rotatable in said cylinder head opening, said insert having a threaded opening therein; a screw member threadably received in said insert, said screw member having means at one end thereof for supporting said rocker arm; said insert and said screw member forming cooperative adjustment means for varying the effective length of said lash adjuster to take up slack in the valve train of said engine; and locking means for said insert to prevent rotation of said insert during adjustment of the valve lash.
  • an internally threaded insert member adapted for positioning in said recess formed in the cylinder head of the engine, said insert member being axially slideable and freely rotatable in said recess;

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
US00229119A 1972-02-24 1972-02-24 Mechanical lash adjuster for overhead cam engines Expired - Lifetime US3791355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22911972A 1972-02-24 1972-02-24

Publications (1)

Publication Number Publication Date
US3791355A true US3791355A (en) 1974-02-12

Family

ID=22859900

Family Applications (1)

Application Number Title Priority Date Filing Date
US00229119A Expired - Lifetime US3791355A (en) 1972-02-24 1972-02-24 Mechanical lash adjuster for overhead cam engines

Country Status (9)

Country Link
US (1) US3791355A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS4898211A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU463598B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BR (1) BR7300865D0 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA973043A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2300459A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2173525A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1366979A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT972667B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098239A (en) * 1975-10-31 1978-07-04 Le Moteur Moderne Valve control device particularly in an overhead camshaft engine
US4326484A (en) * 1979-10-26 1982-04-27 Cummins Engine Company, Inc. Floating tappet guide plate
US4519345A (en) * 1984-03-05 1985-05-28 Bob Walter Adjustable ratio rocker arm
US4617883A (en) * 1984-09-28 1986-10-21 Honda Giken Kogyo Kabushiki Kaisha Pivot members for a cam follower of valve mechanism for internal combustion engine
US4738231A (en) * 1980-03-27 1988-04-19 Toledo Stamping & Manufacturing Company One-piece rocker arm with insert
DE19717991A1 (de) * 1997-04-28 1998-10-29 Schaeffler Waelzlager Ohg Spanlos geformter Schlepphebel
US20030145817A1 (en) * 2001-12-27 2003-08-07 Ken Yamamoto Lash adjuster for use in valve gear
US20110017161A1 (en) * 2008-03-27 2011-01-27 Makoto Yasui Lash adjuster
US20110036314A1 (en) * 2008-03-24 2011-02-17 Makoto Yasui Lash adjuster
US8056518B1 (en) 2009-04-08 2011-11-15 Brunswick Corporation Valve lash adjustment nut
US8985076B1 (en) 2013-03-15 2015-03-24 Brunswick Corporation Valve lash adjustment device
US20160312664A1 (en) * 2016-07-01 2016-10-27 Caterpillar Inc. Valve lifter
US11905859B2 (en) 2020-02-19 2024-02-20 Eaton Intelligent Power Limited Castellation assembly, lash capsule, and rocker arm

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6341573Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1980-12-25 1988-11-01
JPS58129011U (ja) * 1982-02-25 1983-09-01 マツダ株式会社 エンジンのバルブクリアランス調整装置
DE4327943A1 (de) * 1993-08-19 1995-02-23 Audi Ag Ventilsteuerung für eine Brennkraftmaschine
FR2757564B1 (fr) * 1996-12-20 1999-03-26 Peugeot Dispositif de commande d'une soupape de moteur de vehicule automobile
KR20020055753A (ko) * 2000-12-29 2002-07-10 이계안 디젤 엔진용 밸브 간극 조절기

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096750A (en) * 1961-07-14 1963-07-09 Dolza Overhead camshaft engine valve mechanism
US3098472A (en) * 1959-11-26 1963-07-23 Porsche Kg Valve control mechanism for internal combustion engine
US3132636A (en) * 1962-09-11 1964-05-12 Charles J Kliss Conversion unit for hydraulic valve lifters
US3376860A (en) * 1966-01-11 1968-04-09 Eaton Yale & Towne Mechanical lash adjuster
US3532080A (en) * 1967-08-08 1970-10-06 Nissan Motor Device for driving poppet valves of an engine
US3614943A (en) * 1970-06-01 1971-10-26 Gerald A Schley Engine rocker arm support means

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2036479A (en) * 1935-03-18 1936-04-07 Charles E Johnson Self-locking screw
DE939057C (de) * 1952-11-04 1956-02-16 Porsche Kg Einstellvorrichtung fuer Ventilsteuerungen von Brennkraftmaschinen
US2722204A (en) * 1953-06-05 1955-11-01 Daimler Benz Ag Means for adjusting the lost motion of the valve actuation in internal combustion engines
GB801265A (en) * 1956-02-14 1958-09-10 Nat Machine Products Company Improvements relating to valve lash adjusting screws
JPS4523623Y1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1965-12-10 1970-09-17

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098472A (en) * 1959-11-26 1963-07-23 Porsche Kg Valve control mechanism for internal combustion engine
US3096750A (en) * 1961-07-14 1963-07-09 Dolza Overhead camshaft engine valve mechanism
US3132636A (en) * 1962-09-11 1964-05-12 Charles J Kliss Conversion unit for hydraulic valve lifters
US3376860A (en) * 1966-01-11 1968-04-09 Eaton Yale & Towne Mechanical lash adjuster
US3532080A (en) * 1967-08-08 1970-10-06 Nissan Motor Device for driving poppet valves of an engine
US3614943A (en) * 1970-06-01 1971-10-26 Gerald A Schley Engine rocker arm support means

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4098239A (en) * 1975-10-31 1978-07-04 Le Moteur Moderne Valve control device particularly in an overhead camshaft engine
US4326484A (en) * 1979-10-26 1982-04-27 Cummins Engine Company, Inc. Floating tappet guide plate
US4738231A (en) * 1980-03-27 1988-04-19 Toledo Stamping & Manufacturing Company One-piece rocker arm with insert
US4519345A (en) * 1984-03-05 1985-05-28 Bob Walter Adjustable ratio rocker arm
US4617883A (en) * 1984-09-28 1986-10-21 Honda Giken Kogyo Kabushiki Kaisha Pivot members for a cam follower of valve mechanism for internal combustion engine
DE19717991A1 (de) * 1997-04-28 1998-10-29 Schaeffler Waelzlager Ohg Spanlos geformter Schlepphebel
US20030145817A1 (en) * 2001-12-27 2003-08-07 Ken Yamamoto Lash adjuster for use in valve gear
US6729288B2 (en) * 2001-12-27 2004-05-04 Ntn Corporation Lash adjuster for use in valve gear
US20110036314A1 (en) * 2008-03-24 2011-02-17 Makoto Yasui Lash adjuster
US20110017161A1 (en) * 2008-03-27 2011-01-27 Makoto Yasui Lash adjuster
US8056518B1 (en) 2009-04-08 2011-11-15 Brunswick Corporation Valve lash adjustment nut
US8985076B1 (en) 2013-03-15 2015-03-24 Brunswick Corporation Valve lash adjustment device
US20160312664A1 (en) * 2016-07-01 2016-10-27 Caterpillar Inc. Valve lifter
US11905859B2 (en) 2020-02-19 2024-02-20 Eaton Intelligent Power Limited Castellation assembly, lash capsule, and rocker arm

Also Published As

Publication number Publication date
DE2300459A1 (de) 1973-08-30
IT972667B (it) 1974-05-31
JPS4898211A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-12-13
AU463598B2 (en) 1975-07-31
CA973043A (en) 1975-08-19
GB1366979A (en) 1974-09-18
AU5005672A (en) 1974-06-20
FR2173525A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-10-05
BR7300865D0 (pt) 1973-10-25

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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