US3877445A - Hydraulic tappet oil metering means - Google Patents
Hydraulic tappet oil metering means Download PDFInfo
- Publication number
- US3877445A US3877445A US416940A US41694073A US3877445A US 3877445 A US3877445 A US 3877445A US 416940 A US416940 A US 416940A US 41694073 A US41694073 A US 41694073A US 3877445 A US3877445 A US 3877445A
- Authority
- US
- United States
- Prior art keywords
- plunger
- oil
- metering element
- cap
- chamber
- 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
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
- F01L1/245—Hydraulic tappets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
- F01M9/104—Lubrication of valve gear or auxiliaries of tappets
-
- 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
- Y10T137/00—Fluid handling
- Y10T137/7287—Liquid level responsive or maintaining systems
- Y10T137/7358—By float controlled valve
- Y10T137/7423—Rectilinearly traveling float
- Y10T137/7426—Float co-axial with valve or port
- Y10T137/7436—Float rigid with valve
Definitions
- a primary purpose is a hydraulic tappet of the type described having a floating metering element within the pressurized oil chamber.
- Another purpose is a hydraulic tappet of the type described in which a spherical ball having a specific gravity less than that of the oil within the chamber is used to provide the metering means from the pressurized oil chamber.
- FIG. 1 is an axial section through a hydraulic tappet
- FIG. 2 is a bottom view of the plunger cap.
- a generally cylindrical tappet body is indicated at and may have an interior bore 12 terminating in an open end 14.
- a plunger 16 Positioned within the bore 14 is a plunger 16 having a plunger cap 18. Within the plunger is a pressurized oil chamber 20. The plunger reciprocates relative to the tappet body and is held within the bore 12 by means of a snap ring or the like 22 positioned within a groove 24 adjacent the open end 14.
- a plunger return spring 26 is seated upon a surface 28 formed at the closed end of the bore 12 and bears against a portion of a retainer 30 which, through a small spring 32, holds a valve element 34 against the open end 36 of the plunger 16.
- the above-described construction may be conventional and is generally shown in my prior US. Pat. No. 3,430,613.
- the exterior of the tappet body 10 may have a groove 38 which, through a passage 40, communicates with a groove 42 on the interior surface of the tappet body.
- a mating groove 44 is formed on the exterior of the plunger and communicates with the pressurized oil chamber through a passage 46.
- oil passage means are formed between the exterior of the tappet body and the interior of the tappet plunger to pass oil from the engine oil gallery to chamber 20.
- a floating metering element 48 Positioned within the chamber 20 is a floating metering element 48, having a specific gravity less than that of the oil which is normally within the chamber 20, and which will flow through the chamber as a part of the normal operation of the tappet.
- the lower surface of cap 18 may be conical, as indicated at 50, so that the ball 48 may be substantially in mating sealing contact therewith.
- a groove 52 is formed in surface 50, as shown particularly in FIG. 2.
- the groove is in communication with the chamber 20 and with a plunger cap oil orifice 54 which is in communication with a rounded surface or socket S6 at the top of the plunger cap 18. Normally, a portion of the engine push rod will be seated within the socket 56 and thus oil passing through the orifice 54 will be effective to lubricate the push rod and through it the rocker arm.
- the tappet will generally function in the conventional manner.
- the plunger will receive oil from the body through the grooves and passages to fill and pressurize chamber 20.
- the oil within chamber 20 will cause the ball 48 to float upon its upper surface and be maintained in contact with the mating sealing surface 50 at all times during operation of the tappet.
- Oil will be provided at orifice 54 to lubricate the push rod and rocker arm through groove 52, the cross section of which can be closely controlled to provide exact metering of the oil.
- ball 48 having a specific gravity less than that of the oil, will float upon the oil within the chamber and the level of the oil within the chamber will be such that the ball will always be in contact with conical surface 50, thus forming a seal about the orifice 54, except for groove 52.
- the invention should not be limited to a spherical member as the floating metering element. Other shapes may be equally satisfactory. However, with a spherical member, i.e., a ball, the surface 50 will generally be conical. What is important is to provide a floating element, which can seal against a mating surface, except for a defined passageway, the groove 52 as shown in the drawing.
- the ball may be formed of a suitable plastic, and it may be either hollow or solid, depending upon the specific gravity of the plastic.
- the material forming the ball must be such that it can easily withstand the normal engine oil temperatures and pressures without deforming and/or disintegrating.
- the invention should not be limited to the particular manner shown for providing an oil groove on the undersurface of the plunger cap. Other means may be equally satisfactory for providing an oil passage between the floating metering element and the undersurface of the plunger cap.
- a tappet body having a bore therein, a hollow plunger reciprocally mounted in said body bore, an oil chamber within said hollow plunger, cooperating oil passage means between the exterior of said body and said oil chamber, spring means positioned in said bore normally urging said plunger outwardly therefrom,
- said plunger having a plunger cap and an oil orifice in said plunger cap communicating with said chamher, and a floating totally unconfined metering element in said chamber, the specific gravity of the floating metering element being less than the spe cific gravity of oil, cooperating metering means on said element and plunger cap for controlling the flow of oil through said orifice.
Abstract
Description
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US416940A US3877445A (en) | 1973-11-19 | 1973-11-19 | Hydraulic tappet oil metering means |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US416940A US3877445A (en) | 1973-11-19 | 1973-11-19 | Hydraulic tappet oil metering means |
Publications (1)
Publication Number | Publication Date |
---|---|
US3877445A true US3877445A (en) | 1975-04-15 |
Family
ID=23651938
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US416940A Expired - Lifetime US3877445A (en) | 1973-11-19 | 1973-11-19 | Hydraulic tappet oil metering means |
Country Status (1)
Country | Link |
---|---|
US (1) | US3877445A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4438739A (en) * | 1980-03-06 | 1984-03-27 | Aisin Seiki Kabushiki Kaisha | Hydraulic lash adjuster |
US4481913A (en) * | 1982-12-20 | 1984-11-13 | General Motors Corporation | Hydraulic lash adjuster oil metering ball valve |
US5509385A (en) * | 1995-06-15 | 1996-04-23 | Precision Engine Products Corp. | Hydraulic lash adjuster metering valve |
US5622147A (en) * | 1996-03-08 | 1997-04-22 | Eaton Corporation | Hydraulic lash adjuster |
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 |
US20050183686A1 (en) * | 2004-02-25 | 2005-08-25 | Hiroki Fujii | Hydraulic lash adjuster |
US20060180110A1 (en) * | 2005-02-14 | 2006-08-17 | Ina-Schaeffler Kg | Hydraulic lash adjuster |
CN100464097C (en) * | 2005-10-31 | 2009-02-25 | 汉拏空调株式会社 | Expansion valve for rear seat air conditioner |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2356900A (en) * | 1942-06-15 | 1944-08-29 | Eaton Mfg Co | Tappet construction |
US2434386A (en) * | 1945-11-26 | 1948-01-13 | Jess H Bradshaw | Valve silencer |
US2818050A (en) * | 1954-06-02 | 1957-12-31 | Gen Motors Corp | Lubricating system |
US2840063A (en) * | 1955-06-17 | 1958-06-24 | Gen Motors Corp | Hydraulic valve lifter |
US3029832A (en) * | 1958-08-27 | 1962-04-17 | Union Tank Car Co | Brine tank valve |
US3054392A (en) * | 1960-03-24 | 1962-09-18 | Earl A Thompson | Metering valve |
US3194439A (en) * | 1963-09-05 | 1965-07-13 | Herman F Beduerftig | Vortex cavity seal float |
US3273514A (en) * | 1965-06-17 | 1966-09-20 | Lloyd F Bender | Fluid conveying apparatus |
US3379180A (en) * | 1967-06-06 | 1968-04-23 | Gen Motors Corp | Hydraulic valve lifter |
US3455346A (en) * | 1966-06-23 | 1969-07-15 | Atlas Copco Ab | Fuel supply apparatus |
US3490423A (en) * | 1968-06-20 | 1970-01-20 | Gen Motors Corp | Variable stroke hydraulic valve lifter |
US3528451A (en) * | 1967-12-18 | 1970-09-15 | Hansen Machine Co | Liquid level regulating device |
US3662725A (en) * | 1970-08-26 | 1972-05-16 | Motorola Inc | Evaporation emission control device for fuel tanks |
US3665156A (en) * | 1970-09-08 | 1972-05-23 | Herbert P Lee | Heating-element protector for electric water-heater |
US3799186A (en) * | 1972-12-26 | 1974-03-26 | Case Co J I | Drain tube valve |
-
1973
- 1973-11-19 US US416940A patent/US3877445A/en not_active Expired - Lifetime
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2356900A (en) * | 1942-06-15 | 1944-08-29 | Eaton Mfg Co | Tappet construction |
US2434386A (en) * | 1945-11-26 | 1948-01-13 | Jess H Bradshaw | Valve silencer |
US2818050A (en) * | 1954-06-02 | 1957-12-31 | Gen Motors Corp | Lubricating system |
US2840063A (en) * | 1955-06-17 | 1958-06-24 | Gen Motors Corp | Hydraulic valve lifter |
US3029832A (en) * | 1958-08-27 | 1962-04-17 | Union Tank Car Co | Brine tank valve |
US3054392A (en) * | 1960-03-24 | 1962-09-18 | Earl A Thompson | Metering valve |
US3194439A (en) * | 1963-09-05 | 1965-07-13 | Herman F Beduerftig | Vortex cavity seal float |
US3273514A (en) * | 1965-06-17 | 1966-09-20 | Lloyd F Bender | Fluid conveying apparatus |
US3455346A (en) * | 1966-06-23 | 1969-07-15 | Atlas Copco Ab | Fuel supply apparatus |
US3379180A (en) * | 1967-06-06 | 1968-04-23 | Gen Motors Corp | Hydraulic valve lifter |
US3528451A (en) * | 1967-12-18 | 1970-09-15 | Hansen Machine Co | Liquid level regulating device |
US3490423A (en) * | 1968-06-20 | 1970-01-20 | Gen Motors Corp | Variable stroke hydraulic valve lifter |
US3662725A (en) * | 1970-08-26 | 1972-05-16 | Motorola Inc | Evaporation emission control device for fuel tanks |
US3665156A (en) * | 1970-09-08 | 1972-05-23 | Herbert P Lee | Heating-element protector for electric water-heater |
US3799186A (en) * | 1972-12-26 | 1974-03-26 | Case Co J I | Drain tube valve |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4438739A (en) * | 1980-03-06 | 1984-03-27 | Aisin Seiki Kabushiki Kaisha | Hydraulic lash adjuster |
US4481913A (en) * | 1982-12-20 | 1984-11-13 | General Motors Corporation | Hydraulic lash adjuster oil metering ball valve |
US5509385A (en) * | 1995-06-15 | 1996-04-23 | Precision Engine Products Corp. | Hydraulic lash adjuster metering valve |
US5622147A (en) * | 1996-03-08 | 1997-04-22 | Eaton Corporation | Hydraulic lash adjuster |
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 |
US20050183686A1 (en) * | 2004-02-25 | 2005-08-25 | Hiroki Fujii | Hydraulic lash adjuster |
US20060180110A1 (en) * | 2005-02-14 | 2006-08-17 | Ina-Schaeffler Kg | Hydraulic lash adjuster |
CN100464097C (en) * | 2005-10-31 | 2009-02-25 | 汉拏空调株式会社 | Expansion valve for rear seat air conditioner |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MANUFACTURERS HANOVER TRUST COMPANY, NEW YORK Free format text: SECURITY INTEREST;ASSIGNOR:PRECISION PRODUCTS CORP.;REEL/FRAME:005060/0283 Effective date: 19890210 |
|
AS | Assignment |
Owner name: PRECISION PRODUCTS CORP., A CORP. OF DE, CONNECTIC Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:STANADYNE, INC.;REEL/FRAME:005130/0626 Effective date: 19890210 |
|
AS | Assignment |
Owner name: PRECISION ENGINE PRODUCTS CORP. Free format text: CHANGE OF NAME;ASSIGNOR:PRECISION PRODUCTS CORP.;REEL/FRAME:005267/0051 Effective date: 19900219 |
|
AS | Assignment |
Owner name: PRECISION PRODUCTS CORP., CONNECTICUT Free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:CHEMICAL BANK, AS SUCCESSOR IN INTEREST TO MANUFACTURERS HANOVER TRUST COMPANY;REEL/FRAME:007308/0154 Effective date: 19950201 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, NEW YORK Free format text: PATENT SECURITY AGREEMENT;ASSIGNOR:STANADYNE AUTOMOTIVE CORP.;REEL/FRAME:008907/0273 Effective date: 19971211 |