US3782345A - Metered mechanical tappet with slotted push rod seat - Google Patents
Metered mechanical tappet with slotted push rod seat Download PDFInfo
- Publication number
- US3782345A US3782345A US00149483A US14948371A US3782345A US 3782345 A US3782345 A US 3782345A US 00149483 A US00149483 A US 00149483A US 14948371 A US14948371 A US 14948371A US 3782345 A US3782345 A US 3782345A
- Authority
- US
- United States
- Prior art keywords
- seat
- slot
- tappet
- reservoir
- push
- 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
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
-
- 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
-
- 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
-
- 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
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/06—Cam-followers
Definitions
- Oil flow is obtained by a slot in the surface of the seat supported by said shoulder, [52] U S Cl 123/90 35 123/90 48 184/6 9 the slot at least extending radially from the oil reser- [51] kb v 6 1/14' d 9/l'O voir directly below the seat to the outer wall of the [58] Fie'ld l23/90 35 90 43 seat, from whence it passes to the interior of the seat 90 1 2 and to the push rod by means of an annular path between the outer seat wall and the cavity along at least [56] References Cited a portion of the axial extension of the seat.
- the invention relates to a mechanical tappet utilizing continuous precision metering without the necessity for a flat disc positioned immediately below the push-rod seat.
- the invention provides an improved mechanical tappet operatively connected to a push-rod and comprising an oil reservoir, a push-rod seat positioned within a cavity of the tappet, the seat having a central opening communicating with the push-rod and means for metering oil from the reservoir through the seat and into the rod; the improvement comprising the metering means including a slot in one of the surfaces of the seat engaged by the tappet, the slot extending to the reservoir, and a passageway from the slot to the central opening.
- a related object of the invention is to provide a tappet of the above character which is inexpensive to manufacture.
- FIG. 1 is a fragmentary, side elevation partially in section of a tappet constructed in accordance with the invention
- FIG. 2 is a plan view of the retainer utilized in FIG.
- FIG. 3 is a cross-sectional view of the push-rod seat and tappet body taken along the plane III-III of FIG.
- FIG. 4 is an elevational view, partially in section, illustrating the tappet body only
- FIG. 5 is a fragmentary side elevational view partially in section similar to FIG. 1 but illustrating an alternate embodiment
- FIG. 6 is a fragmentary elevational view, partially in section, of still another alternate embodiment of the invention.
- FIG. 7 is a sectional view of the push-rod seat of the embodiment shown in FIG. 6;
- FIG. 8 is a plan view of the tappet of FIG. 6 but without the push-rod.
- FIG. 9 is a cross-sectional view of a modified pushrod seat.
- the invention relates to an improved mechanical tappet 10 utilized in a conventional engine block having a crankcase 11 and a passageway 12 connecting the tappet 10 to an oil gallery.
- the tappet includes the tappet body in which is seated a push-rod seat 16 supporting a push-rod 14, the entire combination being reciprocated in a conventional fashion by a cam 18 on camshaft 20.
- the tappet body 24 is conventionally provided (FIG. 4) with an oil reservoir 22 in the lower part and a groove in the outer part thereof.
- the upper portion is provided with an enlarged cavity 25 having the following configuration.
- a shoulder 26 is formed by an annular undercut 50. Spaced above the undercut 50 is still another undercut in the form ofa groove 29. The shoulder 26 serves to accomodate and support the seat 16, while the functions of the undercut and the groove are hereinafter described.
- a metering means 36 is constructed in the push-rod seat 16 so as to not need a flat disc as was utilized in the aforesaid U.S. Pat. No. 3,6l 8,575.
- the elimination of this element is made possible by utilizing, in the embodiment illustrated in FIGS. 1-4, a metering slot 40 (see FIG. 3) in the bottom surface of the push-rod seat 16, the slot 40 being positioned within the surface 42 which rests upon the annular shoulder 26.
- the slot 40 extends radially from the outer wall 17 of the push-rod seat at least to a point at which it is in communication with the oil reservoir 22.
- a nommetering passageway comprising an annular path between the outer wall 17 of the push-rod seat 16 and the wall of the cavity 25 extending along at least a portion of the outer wall 17 is provided.
- the annular path comprises the annular under cut in the interior wall of the cavity 25, the undercut extending approximately half-way up the surface of the wall 17.
- a cross hole 52 is provided within the push-rod seat 16, extending radially from the center opening 27 to the wall 17 and thus communicating with the annular undercut 50.
- the push-rod seat 16 having the preceding features can be manufactured by any conventional technique, such as by machining a suitable metal blank.
- the metering slot can be coined to insure proper size.
- a resilient retainer 60 is pressed into the housing 24 so as to prevent the surface 42 of the push-rod seat from separating from the shoulder in the direction of reciprocation of the tappet. That is, tendency to separate will be caused by lash, and this tendency is prevented by the frictional retention of the retainer 60 within the cavity 25.
- the retainer 60 comprises a flexible metallic piece which is dish-shaped (FIG. 2) so as to provide an upstanding'edge 62 formed by a bend 64.
- a central hole 66 accommodates the push-rod 14.
- the groove 29 may be provided within the cavity wall. (See FIG. 4.) However, it has been found that the groove 29 is not essential to the proper retention of the retainer 60.
- the aforegoing construction allows the push-rod seat 16 to rotate within the cavity 25 with the surface 42 pressed upon the shoulder 26 so as to lessen the tendency of the slot 40 to become plugged. At the same time, this construction prevents any axial movement of the push-rod seat 16 so as to unseat and thereby enlarge the slot 40 allowing too much oil to meter into the cross hole 52 and thence into the push-rod 14.
- the oil flow to the rocker arm through the push-rod 14 is from the passageway 12, reservoir 22 defined by the tappet body 24, through metering means 36, and thence through the central opening 27 in the push-rod seat to the hole 28 in the bottom of the pushrod 14.
- the oil in the reservoir 22 is replenished each time the groove 30 of the housing 24 reciprocates past the opening to the passageway 12.
- FIG. illustrates an alternate embodiment of the invention wherein a different construction is utilized to retain the push-rod seat from axial movement within the tappet. Similar parts which correspond to those utilized in the previous embodiment utilize the same numerals to which the distinguishing suffix a has been added.
- a tappet a is operated by a cam 18a within a crankcase Ila, the oil flowing from a passageway 120 through a reservoir 22a, slot 40a and up into a push-rod 14a.
- the metering means 36a is identical in all respects with that described in the previous embodiment except that the annular path between the outer wall 17a of the push-rod seat and the inner wall of the cavity a is formed by reducing the diameter of the outer wall 170 for almost the entire length of the push-rod seat. Thus, there is no annular undercut in the inner wall of the cavity 25a.
- the reduced diameter of the outer wall 170 terminates at a pointjust below the top surface 70 of the push-rod seat, thereby forming an annular lip 72, the outer diameter of which exceeds the diameter of the inner wall of the cavity 25a.
- This construction insures that the push-rod seat 16a will be press-fit into the cavity 25a and retained in the position wherein its surface 42a is constantly supported bythe annular shoulder 26a of the cavity 25a.
- FIGS. 6 through 8 illustrate still another embodiment wherein the metering is accomplished by the annular path between the walls of the push-rod seat and the cavity of the tappet, rather than by the slot, so that the slot merely conveys ample oil to the annular path under all conditions of operation of the device.
- Similar parts which correspond to those utilized in the previous embodiments bear the same reference numerals to which the distinguishing suffixb has been added.
- a tappet 10b reciprocates within a crankcase 11b, the oil flowing from a passageway 12b, into a reservoir 22b and through a conveying means 36b into a central opening 27b and thence up into a push-rod 14b by means of the hole 28b therein.
- the metering in this embodiment is accomplished by the annular path between the wall 17b of the push-rod seat 16b in the wall of the cavity 25b, a slot being provided in the bottom of the push-rod seat 16 in the surface which rests upon the annular shoulder 26b solely for the purpose of supplying continuously a flow of oil to the annular path.
- the radial thickness of the annular path is substantially less than any of the dimensions of the slot 80, the thickness being controlled by strict tolerance requirements on the dimensions of the walls of the push-rod seat and the cavity. The particular dimensions vary with the amount of metering desired, and are readily determinable.
- FIGS. 6 through 8 also illustrates that the cross hole 52b can extend the full diameter of the push-rod seat so as to provide access to the central opening 27b by two different locations in the annular path. Or, in the alternative, the cross hole 52b need extend only as a radius of the push-rod seat. Further variations are to make the push rod seat in two parts, the lower part being a disk as shown in FIG. 9 with slots 80a, 52c and 52a in opposite sides thereof, and the upper part being the seat 170. This construction permits shallower slots and reduces flow characteristics.
- a mechanical tappet operatively connected to a push rod and comprising a tappet body having an oil reservoir, a push rod seat positioned within a cavity of said tappet and movable into and out of engagement with an annular shoulder of said tappet body, said seat having an opening communicating with said push rod, and means located between said reservoir and said opening for metering oil from said reservoir into said rod; the improvement comprising a passageway for said oil between said reservoir and metering means including a slot means in one of the engaging surfaces of said seat and said tappet body, said slot means extending at least to the reservoir and providing a means for permitting oil to flow continuously from said reservoir to said metering means and into said push rod regardless of whether said rod seat is bearing against said annular shoulder.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00149483A US3782345A (en) | 1970-04-20 | 1971-06-03 | Metered mechanical tappet with slotted push rod seat |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US29915A US3614942A (en) | 1970-04-20 | 1970-04-20 | Metered mechanical tappet with slotted pushrod seat |
US00149483A US3782345A (en) | 1970-04-20 | 1971-06-03 | Metered mechanical tappet with slotted push rod seat |
AU32945/71A AU454829B2 (en) | 1970-04-20 | 1971-09-01 | Metered mechanical tappet with slotted pushrod seat |
Publications (1)
Publication Number | Publication Date |
---|---|
US3782345A true US3782345A (en) | 1974-01-01 |
Family
ID=3720420
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US29915A Expired - Lifetime US3614942A (en) | 1970-04-20 | 1970-04-20 | Metered mechanical tappet with slotted pushrod seat |
US00149483A Expired - Lifetime US3782345A (en) | 1970-04-20 | 1971-06-03 | Metered mechanical tappet with slotted push rod seat |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US29915A Expired - Lifetime US3614942A (en) | 1970-04-20 | 1970-04-20 | Metered mechanical tappet with slotted pushrod seat |
Country Status (6)
Country | Link |
---|---|
US (2) | US3614942A (en) |
AU (1) | AU454829B2 (en) |
CA (2) | CA947165A (en) |
DE (1) | DE2100672C2 (en) |
FR (1) | FR2092527A5 (en) |
GB (1) | GB1292762A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4227495A (en) * | 1978-09-21 | 1980-10-14 | Eaton Corporation | Hydraulic lash adjuster with oil reservoir separator |
US4601268A (en) * | 1984-02-27 | 1986-07-22 | Rhoads Gary E | Variable two-way bleed valve |
US4739675A (en) * | 1980-11-14 | 1988-04-26 | Connell Calvin C | Cylindrical tappet |
US20040074460A1 (en) * | 2002-10-18 | 2004-04-22 | Dhruva Mandal | Valve lifter body |
US20050000314A1 (en) * | 2002-10-18 | 2005-01-06 | Dhruva Mandal | Roller follower body |
US20110023704A1 (en) * | 2008-03-26 | 2011-02-03 | Friedrich Boecking | Pump, in particular high-pressure fuel pump |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3717134A (en) * | 1971-09-13 | 1973-02-20 | Johnson Products Inc | Tappet push rod seat and meter means |
US3799129A (en) * | 1972-11-06 | 1974-03-26 | Johnson Products Inc | Hydraulic lash adjuster oil metering means |
US4083334A (en) * | 1973-04-26 | 1978-04-11 | Carlos Alberto Ferrari Roncon | Hydraulic valve lifter |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2874685A (en) * | 1955-08-26 | 1959-02-24 | Eaton Mfg Co | Hydraulic valve lifter |
US3280807A (en) * | 1965-10-28 | 1966-10-25 | Lubrizol Corp | Metering valve for hydraulic valve lifter |
US3437080A (en) * | 1967-11-13 | 1969-04-08 | Eaton Yale & Towne | Valve tappet |
US3448730A (en) * | 1967-06-07 | 1969-06-10 | Eaton Yale & Towne | Hydraulic valve lifter |
US3476093A (en) * | 1967-10-10 | 1969-11-04 | Eaton Yale & Towne | Hydraulic valve lifter |
US3477416A (en) * | 1967-09-27 | 1969-11-11 | Eaton Yale & Towne | Hydraulic lifter |
US3598095A (en) * | 1969-10-02 | 1971-08-10 | Eaton Yale & Towne | Hydraulic valve lifter with temperature compensating lubricant metering means |
US3630179A (en) * | 1970-04-20 | 1971-12-28 | Johnson Products Inc | Metered mechanical tappet |
US3636932A (en) * | 1970-05-18 | 1972-01-25 | Stanadyne Inc | Tappet with means for relieving entrained air |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB214537A (en) * | 1923-08-31 | 1924-04-24 | Gustave Maurice Maclure | Improvements relating to the lubrication of internal combustion engines |
US2865352A (en) * | 1955-12-05 | 1958-12-23 | Earl A Thompson | Tappet construction |
GB1080513A (en) * | 1966-07-12 | 1967-08-23 | Brico Eng | Tappets |
-
1970
- 1970-04-20 US US29915A patent/US3614942A/en not_active Expired - Lifetime
-
1971
- 1971-01-07 CA CA102,196A patent/CA947165A/en not_active Expired
- 1971-01-08 DE DE2100672A patent/DE2100672C2/en not_active Expired
- 1971-01-18 GB GB2372/71A patent/GB1292762A/en not_active Expired
- 1971-03-30 FR FR7111175A patent/FR2092527A5/fr not_active Expired
- 1971-06-03 US US00149483A patent/US3782345A/en not_active Expired - Lifetime
- 1971-09-01 AU AU32945/71A patent/AU454829B2/en not_active Expired
-
1974
- 1974-02-15 CA CA192,707A patent/CA963336A/en not_active Expired
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2874685A (en) * | 1955-08-26 | 1959-02-24 | Eaton Mfg Co | Hydraulic valve lifter |
US3280807A (en) * | 1965-10-28 | 1966-10-25 | Lubrizol Corp | Metering valve for hydraulic valve lifter |
US3448730A (en) * | 1967-06-07 | 1969-06-10 | Eaton Yale & Towne | Hydraulic valve lifter |
US3477416A (en) * | 1967-09-27 | 1969-11-11 | Eaton Yale & Towne | Hydraulic lifter |
US3476093A (en) * | 1967-10-10 | 1969-11-04 | Eaton Yale & Towne | Hydraulic valve lifter |
US3437080A (en) * | 1967-11-13 | 1969-04-08 | Eaton Yale & Towne | Valve tappet |
US3598095A (en) * | 1969-10-02 | 1971-08-10 | Eaton Yale & Towne | Hydraulic valve lifter with temperature compensating lubricant metering means |
US3630179A (en) * | 1970-04-20 | 1971-12-28 | Johnson Products Inc | Metered mechanical tappet |
US3636932A (en) * | 1970-05-18 | 1972-01-25 | Stanadyne Inc | Tappet with means for relieving entrained air |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4227495A (en) * | 1978-09-21 | 1980-10-14 | Eaton Corporation | Hydraulic lash adjuster with oil reservoir separator |
US4739675A (en) * | 1980-11-14 | 1988-04-26 | Connell Calvin C | Cylindrical tappet |
US4601268A (en) * | 1984-02-27 | 1986-07-22 | Rhoads Gary E | Variable two-way bleed valve |
US20040074460A1 (en) * | 2002-10-18 | 2004-04-22 | Dhruva Mandal | Valve lifter body |
US20050000314A1 (en) * | 2002-10-18 | 2005-01-06 | Dhruva Mandal | Roller follower body |
US20110023704A1 (en) * | 2008-03-26 | 2011-02-03 | Friedrich Boecking | Pump, in particular high-pressure fuel pump |
Also Published As
Publication number | Publication date |
---|---|
CA947165A (en) | 1974-05-14 |
DE2100672A1 (en) | 1971-11-11 |
DE2100672C2 (en) | 1983-08-25 |
CA963336A (en) | 1975-02-25 |
US3614942A (en) | 1971-10-26 |
GB1292762A (en) | 1972-10-11 |
FR2092527A5 (en) | 1972-01-21 |
AU454829B2 (en) | 1974-10-24 |
AU3294571A (en) | 1973-03-08 |
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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 |