US3108580A - Non-rotatable valve tappet - Google Patents

Non-rotatable valve tappet Download PDF

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Publication number
US3108580A
US3108580A US264853A US26485363A US3108580A US 3108580 A US3108580 A US 3108580A US 264853 A US264853 A US 264853A US 26485363 A US26485363 A US 26485363A US 3108580 A US3108580 A US 3108580A
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housing
tappet
engine
tappets
piston
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US264853A
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Jr Harvey J Crane
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Assigned to CHURCHILL CAPITAL PARTNERS-II reassignment CHURCHILL CAPITAL PARTNERS-II SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CRANE CAMS, INCORPORATED
Assigned to PNC BANK, NATIONAL ASSOCIATION reassignment PNC BANK, NATIONAL ASSOCIATION SECURITY AGREEMENT Assignors: CRANE TECHNOLOGIES GROUP, INC.
Expired - Lifetime legal-status Critical Current

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    • 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
    • F01L2307/00—Preventing the rotation 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18056—Rotary to or from reciprocating or oscillating
    • Y10T74/18296—Cam and slide
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2107—Follower

Definitions

  • FIG.5 Oct. 29, 1963 J, CRANE, JR 3,108,580 I NON-ROTATABLE VALVE TAPPET I Filed March 13, 1963 FIG.1 FIG.5
  • a further object of the invention is to provide a tappet of cylindrical hollow shape that is cut away at its lower end to receive a journaled roller bearing and with the tappet body being skirted over the periphery of the roller to obtain a maximum wearing surface for the tappet body with respect to the block to thus obtain a maximum support for the tappet in its up and down movement thus permitting the tappet body to be formed of a light weight meal and reducing the reciprocating weight of the valve train and to permit an internal combustion engine to operate at much higher speeds.
  • the valve tappet operates through the openings of the engine block and is so constructed that it collects oil from conventional oil channels and the construction is such that no appreciable amount of oil will be collected into the tappet that would additionally increase its weight.
  • FIGURE 1 is a side elevation of a pair of valve tappets constructed in accordance with the invention and with a portion of the engine block being shown in section,
  • FIGURE 4 is a sectional view taken substantially on line 4-4- of FIGURE 2,
  • FIGURE 5 is an enlarged horizontal section taken substantially on line 55 of FIGURE 1, and
  • the block 15 is provided with the usual oil port 16 whereby oil under pressure is delivered to all of the tappets in the group.
  • the body 2 is further circumferentially grooved at 17 to reduce the frictional engagernent between the body and the openings 14 and to constitute an oil passage to the next tappet.
  • the cams ll will force the body 2 upwardly against the tension of the conventional valve springs and at all times, regardless of the speed of the engine, the tappets will partake of vertical movement without rotation and will maintain the rollers 9 in accurate engagement with the cams 11.
  • the pistons 28 may or" course be free to rotate since the lubrication to the recess 32 will be maintained at all times through the medium of the ports 27 and the groove 29.
  • the device is simple in construction, is strong, durable, permits of the device being manufactured of light weight metal, such as aluminum, has a definite hearing at all times through the openings 14 of the block due primarily to the skirts 13.
  • the structure primarily is to prevent rotation of the tappets and to permit the rise and fall of the tappets under the influence of the cams 11 and has few and simple parts that may be economically manufactured and installed within a minimum of etlort.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Description

Oct. 29, 1963 J, CRANE, JR 3,108,580 I NON-ROTATABLE VALVE TAPPET I Filed March 13, 1963 FIG.1 FIG.5
IN VENTOR FIG.3 Fl6.4
HARVEY J. CRANE JR.
United States Patent 3,ll 8,580 NUN-RQTATABLE VALVE TAPPET Harvey 5. Crane, Pin, RU, Box 175, Hallandaie, Fla. Filed Mar. 13, I963, Ser. No. 264,853 (Ilaims. Cl. 123-9tb) This invention relates to automati-ve valve lifters and has particular reference to a valve lifter that is freely operable without rotation.
The present invention contemplates a valve litter of the type that is guided in cylindrical openings of the engine block and with the valve lifters being provided with a roller for engagement with the conventional cams formed on the cam shaft of the engine and with ad jacent lifters, comprising inlet and exhaust vialves, there has been provided a plate that extends between the two adjacent lifters and whereby the lifters may be reciprocated up and down without axial rotation.
Preventing rotation of the valve lifter is absolutely essential when the tappets or lifters have a roller contacting the cam shaft which provides the correct timing and lift. The principal application of this invention is for use with special cam shafts and the nonarotating tappet is provided with an alignment bar or plate that seats upon a surface of the engine block and that is held in position against vertical movement by compression springs and with the tappets being connected with respect to the alignment bar in a manner to prevent the rotation of the tappet.
A further object of the invention is to provide a tappet of the type that has a hollow cylindrical body that is forked at its lower end to receive a roller bearing and with a piston disposed within the body to engage a conventional valve stem and with the body at its upper portion being cut away at two opposite sides to receive a forked end of an alignment bar.
A further object of the invention is to provide a tappet of cylindrical hollow shape that is cut away at its lower end to receive a journaled roller bearing and with the tappet body being skirted over the periphery of the roller to obtain a maximum wearing surface for the tappet body with respect to the block to thus obtain a maximum support for the tappet in its up and down movement thus permitting the tappet body to be formed of a light weight meal and reducing the reciprocating weight of the valve train and to permit an internal combustion engine to operate at much higher speeds. The valve tappet operates through the openings of the engine block and is so constructed that it collects oil from conventional oil channels and the construction is such that no appreciable amount of oil will be collected into the tappet that would additionally increase its weight.
Novel features of construction and operation of the device will be more clearly apparent during the course of the following description, reference being had to the accompanying drawings wherein has been illustrated a preferred form of the device and wherein like characters of reference are employed to denote like parts throughout the several figures In the drawings:
FIGURE 1 is a side elevation of a pair of valve tappets constructed in accordance with the invention and with a portion of the engine block being shown in section,
FIGURE 2 is a top plan view of the tappet assemblies illustrated in FIGURE 1,
FIGURE 3 is a vertical section taken substantially on line 33 of FIGURE 1,
FIGURE 4 is a sectional view taken substantially on line 4-4- of FIGURE 2,
FIGURE 5 is an enlarged horizontal section taken substantially on line 55 of FIGURE 1, and
FIGURE 6 is a perspective view of an alignment bar.
Referring specifically to the drawings, there has been illustrated a pair of adjacent tappet devices 1. Each tappet is substantiaily identical and a description of one will suflice for both. The tappets each embody a tubular cylindrical body 2 having a cylindrical bore 3. The bore 3 terminates downwardly at a shoulder 3. The body 2 is open at its upper end and its lower end is forked to provide a pair of side flanges i. The flanges 4 are apertured at 5 to receive a sleeve 6. The sleeve 6 is held against displacement from the apertures 5 by split rings 7, having a snapping engagement into cut grooves 8. Rotatable upon the sleeve 6 is a roller 9, anti-frictionally supported by needle bearings 14 The roller projects below the flanges 4 for contacting engagement with cams II, formed upon the usual cam shaft 12 and through the medium of which the body 2 is oscillated in a vertical manner. The body 2 at its lower end is skirted at 13 to partially overlie the periphery of the roller and whereby to increase the bearing of the body 2 through the guide openings 14,
fonrned in the engine block 15, fragmentarily illustrated in FIGURE 1. The block 15 is provided with the usual oil port 16 whereby oil under pressure is delivered to all of the tappets in the group. The body 2 is further circumferentially grooved at 17 to reduce the frictional engagernent between the body and the openings 14 and to constitute an oil passage to the next tappet.
T he body portion 2 at its upper portion is reduced in diameter as shown at 18, forming a shoulder 19 and an upper flange 2t). Disposed upon the reduced portion 18 is a coil spring 21. The coil spring 21 at its upper end bears against a split ring 22 that engages within an undercut groove 23 below the flange 20. The upper portion of the body 2 is cut away and slotted to form relatively fiat side walls 24. In each pair of tappets 1, the flat side walls are engaged by legs 25 of an alignment bar 26. The alignment bar extends between two adjacent tappets 1 and prevents the rotation of the tappets during their oscillatory movement and the bar 26 rests upon the top surface of the engine block '15 and is held in such engagement by the springs 21. As the tappet is raised by the earns 11, the bar 26 is biased toward the surface of the block 15 at all times and the engagement of the legs 25 upon the opposite fiat sides of the tappet prevent any rotation of the tappet. 'I wo opposite sides of the body 2 are apertured at 27 to constitute oil ports that receive oil from the oil ports 16 and whereby oil is conducted for lubrication of a tappet piston, to be described.
Siidable Within the bore 3 of the body 2,, is a piston 23, normally resting upon the shoulder 3'. The piston is circumferentially grooved adjacent its upper end as indicated at 2*? and with the groove being substantially in alignment with the apertures 27. The piston 28 is transversely bored from the groove 29 as indicated at St and the bore 3% communicates with a port 31 that enters a concave portion 32 formed in the upper end of the piston tor the seating engagement of the lower end of a valve push rod, not shown and whereby the push rod will be lubricated with respect to the piston. Lubricating oil will flow through the ports 27, to the groove 29 and through the port 31 through the recess 32 during the oscillatory movement of the tappet.
The tappet is assembled with respect to the block 15 in the usual manner and such assembly requires no exceptional mechanical skill. When the tappet is inserted through the openin s 14, their upper fiat sides are engaged with the bars 26 and the springs 21 then engaged over the upper portion of the body to bear against the bar 26. The ring 22 is then engaged within the groove 23 below the flange 2t maintaining the spring in bearing engagement with respect to the bar 26. The conventional push rods are then inserted through the block of the engine with their lower ends hearing within the recess 32 and with the rollers 9 bearing against the cams 11. As the engine is operated, the cams ll will force the body 2 upwardly against the tension of the conventional valve springs and at all times, regardless of the speed of the engine, the tappets will partake of vertical movement without rotation and will maintain the rollers 9 in accurate engagement with the cams 11. The pistons 28 may or" course be free to rotate since the lubrication to the recess 32 will be maintained at all times through the medium of the ports 27 and the groove 29. The device is simple in construction, is strong, durable, permits of the device being manufactured of light weight metal, such as aluminum, has a definite hearing at all times through the openings 14 of the block due primarily to the skirts 13. The structure primarily is to prevent rotation of the tappets and to permit the rise and fall of the tappets under the influence of the cams 11 and has few and simple parts that may be economically manufactured and installed within a minimum of etlort.
It is to be understood that the invention is not limited to the precise construction shown, but that changes are contemplated as readily fall within the spirit of the invention as shall be determined by the scope of the subjoined claims.
I claim:
r1. A non-rotatable valve tappet for internal combustion engines wherein a pair of adjacent tappets are employed to actuate alternately the intake and exhaust valves of the engines, each tappet comprising a cylindrical hollow housing open at its upper end, the housing being reciprocatable through a cylindrical opening formed in a portion of an engine block, a lower portion of the housing being bifurcated to rotatably receive a roller that engages a cam device formed. upon a cam shaft of the engine, the housing being biased upwardly by a coil spring that is disposed upon the upper portion of the housing that extends above the engine block, the opposite sides of the upper portion of the housing being formed fiat, a plate disposed upon the top of the block and with the plate having its ends bifurcated to simultaneously engage the flat sides of two adjacent tappets whereby the tappets are prevented from rotation during the reciprocating movement, a piston device seated within the housing of each tappet and with the upper end of the piston being concave to receive the lower end of a valve push-rod and means to lubricate the housing and the concave piston.
2. A non-rotatable valve tappet for internal combustion engines that comprises, a cylindrical body portion that reciprocates through a cyclindrical opening formed in an engine block, the lower end of the housing being bifurcated, a hollow shaft extending through the bifurcations, a roller anti-frictionally supported upon the shaft, the roller adapted to engage a cam formed upon a cam shaft of the engine, an upper portion or" the housing extending above the opening of the engine block, a compression spring engaging over the upper end of the housing, two opposite sides of the housing at it supper end being formed fiat, a fiat plate adapted to rest upon the engine block and having its opposite ends bifurcated and whereby the plate and its ends extend between tWo adjacent tappets for preventing rotation of the tappets, the housing having an axial bore and with the bore terminating in a shoulder intermediate the length of the tappet, the bore being cylindrical and with the bore opening at the top of the tappet, a piston engaging within the bore and seating upon the shoulder, the upper end of the piston having a concave recess for engagement with a lower end of a valve push-rod, the piston having a circumferential groove that communicates :with opposite openings formed in the side walls of the housing and whereby to receive lubricating oil from an oil channel formed in the engine block, the said springs being fixed upon upper extensions of the housings against displacement therefrom and with the springs bearing upon the bifurcations of the plate.
3. The structure according to claim 2 wherein the lower portion of the housing between the bifurcations thereof is provided with a skirt, the housing, the bifurcations thereof and the skirt being molded integral, the upper extension of the housing being circumferentially grooved to receive a C-ring and thereby fixing the spring from displacement from the housing.
4. The structure according to claim 2 wherein the circumferential groove of the piston is ported transversely of the piston and a second port extends from the last named port to transmit oil to the concave recess of the piston.
5. The structure according to claim 2 wherein the hollow shaft is held within openings in the bifurcations of the housing by C-rinigs, the said roller being rotatable upon needle bearings.
References Cited in the file of this patent UNITED STATES PATENTS 1,802,330 Boland Apr. 28, 1931 2,089,478 l-leiss Aug. 10, 1937 2,107,456 Trapp Feb. 8, 1938 2,846,988 lskenderian Aug. 12, 1958

Claims (1)

1. A NON-ROTATABLE VALVE TAPPET FOR INTERNAL COMBUSTION ENGINES WHEREIN A PAIR OF ADJACENT TAPPETS ARE EMPLOYED TO ACTUATE ALTERNATELY THE INTAKE AND ECHAUST VALVES OF THE ENGINES, EACH TAPPET COMPRISING A CYLINDRICAL HOLLOW HOUSING OPEN AT ITS UPPER END, THE HOUSING BEING RECIPROCATABLE THROUGH A CYLINDRICAL OPENING FORMED IN A PORTION OF AN ENGINE BLOCK, A LOWER PORTION OF THE HOUSING BEING BIFURCATED TO ROTATABLY RECEIVE A ROLLER THAN ENGAGES A CAM DEVICE FORMED UPON A CAM SHAFT OF THE ENGINE, THE HOUSING BEING BIASED UPWARDLY BY A COIL SPRING THAT IS DISPOSED UPON THE UPPER PORTION OF THE HOUSING THAT EXTENDS ABOVE THE ENGINE BLOCK, THE OPPOSITE SIDES OF THE UPPER PORTION OF THE HOUSING BEING FORMED FLAT, A PLATE DISPOSED UPON THE TOP OF THE BLOCK AND WITH
US264853A 1963-03-13 1963-03-13 Non-rotatable valve tappet Expired - Lifetime US3108580A (en)

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Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267919A (en) * 1965-06-21 1966-08-23 Gen Motors Corp Tappet anti-rotating device
US3523459A (en) * 1967-09-25 1970-08-11 Cav Ltd Reciprocating mechanisms
US3795229A (en) * 1972-12-26 1974-03-05 Caterpillar Tractor Co Engine valve lifter guide
US3886808A (en) * 1972-12-26 1975-06-03 Caterpillar Tractor Co Engine valve lifter guide
US3977370A (en) * 1974-10-23 1976-08-31 Sealed Power Corporation Roller tappet
US4095460A (en) * 1976-07-20 1978-06-20 Cuff Calvin I Device for converting rotary motion into unidirectional motion
US4173954A (en) * 1977-12-13 1979-11-13 Speckhart Frank H Limited rotation roller tappet
DE3039946A1 (en) * 1979-10-26 1981-05-07 Cummins Engine Co., Inc., 47201 Columbus, Ind. DEVICE FOR PREVENTING THE ROTATION OF PISTONS IN INTERNAL COMBUSTION ENGINES
US4339234A (en) * 1979-08-03 1982-07-13 Lucas Industries Limited Drive cam and follower for a liquid fuel injection pumping apparatus
US4361120A (en) * 1980-05-02 1982-11-30 Sealed Power Corporation Roller tappet and method of making same
EP0202448A2 (en) * 1985-05-15 1986-11-26 Eaton Corporation Roller follower hydraulic tappet
EP0221284A1 (en) * 1985-10-30 1987-05-13 Eaton Corporation Roller follower axle retention
DE3618240A1 (en) * 1986-05-30 1987-12-03 Kloeckner Humboldt Deutz Ag Lifting appliance
US4809651A (en) * 1988-04-04 1989-03-07 Gerchow James R Valve tappet apparatus
US4846121A (en) * 1988-10-05 1989-07-11 Ford Motor Company Variable friction roller tappets
US5010856A (en) * 1990-10-15 1991-04-30 Ford Motor Company Engine finger follower type rocker arm assembly
US5022356A (en) * 1990-10-05 1991-06-11 Gear Company Of America, Inc. Roller valve lifter with anti-rotation member
DE4115670A1 (en) * 1991-05-14 1992-11-19 Bayerische Motoren Werke Ag IC engine with valve pushers protected against twisting - has profiled member partially U=shaped in cross=section and wrapping around web by cylinder head
US5188068A (en) * 1991-02-04 1993-02-23 Crane Cams Roller tappet
DE4337952A1 (en) * 1993-11-06 1995-05-11 Schaeffler Waelzlager Kg Cam follower for a valve gear of an internal combustion engine
DE4444479A1 (en) * 1994-12-14 1996-06-20 Schaeffler Waelzlager Kg Cam follower for IC engine valve drive
US5546899A (en) * 1995-02-10 1996-08-20 Air Flow Research Heads, Inc. Valve train load transfer device for use with hydraulic roller lifters
US5678514A (en) * 1996-04-02 1997-10-21 Ford Global Technologies, Inc. Valve lifter retainer for an internal combustion engine
US5934232A (en) * 1998-06-12 1999-08-10 General Motors Corporation Engine valve lift mechanism
US5960758A (en) * 1998-05-05 1999-10-05 General Motors Corporation Roller cam follower bearing shaft retention
US6357407B2 (en) * 1998-12-01 2002-03-19 Competition Cams Anti-rotation valve lifter guide apparatus
US6405699B1 (en) * 2001-08-09 2002-06-18 Eaton Corporation Roller follower guide orientation and anti-rotation feature
DE10163411A1 (en) * 2001-12-21 2003-07-03 Ina Schaeffler Kg Guide rail for the valve train of an internal combustion engine
US6782858B2 (en) 2002-03-21 2004-08-31 Ina-Schaeffler Kg Valve drive for an internal combustion engine
US20040211375A1 (en) * 2003-04-24 2004-10-28 Spath Mark J. Anti-rotation guide for a deactivation hydraulic valve lifter
US20050120989A1 (en) * 2002-02-06 2005-06-09 Norbert Geyer Switch element for valve actuation in an internal combustion engine
US20060005797A1 (en) * 2004-07-08 2006-01-12 Schubeck Joseph J Roller valve lifter
US7263956B2 (en) 1999-07-01 2007-09-04 Delphi Technologies, Inc. Valve lifter assembly for selectively deactivating a cylinder
WO2009007225A1 (en) * 2007-07-09 2009-01-15 Schaeffler Kg Anti-rotation locking mechanism for controlling mechanical play
US20090159029A1 (en) * 2007-11-21 2009-06-25 Mario Kuhl Switchable Tappet
US7568461B1 (en) * 2008-06-20 2009-08-04 Gm Global Technology Operations, Inc. Tappet roller end shape for improved lubrication and combination with fuel pump and engine
US20110061615A1 (en) * 2009-09-17 2011-03-17 Hendriksma Nick J Apparatus and Method for Setting Mechanical Lash in a Valve-Deactivating Hydraulic Lash Adjuster
USRE44864E1 (en) 2001-09-19 2014-04-29 Ina Schaeffler Kg Switching element for a valve train of an internal combustion engine
FR2998614A1 (en) * 2012-11-29 2014-05-30 Skf Ab CAM FOLLOWER WITH ANTI-ROTATION DEVICE
EP2955342A1 (en) * 2014-06-13 2015-12-16 Aktiebolaget SKF Cam follower unit
US20170175591A1 (en) * 2015-12-17 2017-06-22 Aktiebolaget Skf Cam follower roller device
DE102017107100B3 (en) 2017-04-03 2018-06-14 Schaeffler Technologies AG & Co. KG Lightweight roller tappet
DE102017107099B3 (en) 2017-04-03 2018-06-28 Schaeffler Technologies AG & Co. KG Multi-part roller tappet for a high-pressure fuel pump

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US1802330A (en) * 1929-05-24 1931-04-28 Aeromarine Plane & Motor Compa Valve mechanism
US2089478A (en) * 1935-05-23 1937-08-10 Gen Motors Corp Tappet spring retainer
US2107456A (en) * 1935-07-31 1938-02-08 Automotive Prod Co Ltd Cam and follower mechanism
US2846988A (en) * 1956-10-30 1958-08-12 Iskenderian Edward Guide means for non rotatable valve lifters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1802330A (en) * 1929-05-24 1931-04-28 Aeromarine Plane & Motor Compa Valve mechanism
US2089478A (en) * 1935-05-23 1937-08-10 Gen Motors Corp Tappet spring retainer
US2107456A (en) * 1935-07-31 1938-02-08 Automotive Prod Co Ltd Cam and follower mechanism
US2846988A (en) * 1956-10-30 1958-08-12 Iskenderian Edward Guide means for non rotatable valve lifters

Cited By (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3267919A (en) * 1965-06-21 1966-08-23 Gen Motors Corp Tappet anti-rotating device
US3523459A (en) * 1967-09-25 1970-08-11 Cav Ltd Reciprocating mechanisms
US3795229A (en) * 1972-12-26 1974-03-05 Caterpillar Tractor Co Engine valve lifter guide
US3886808A (en) * 1972-12-26 1975-06-03 Caterpillar Tractor Co Engine valve lifter guide
US3977370A (en) * 1974-10-23 1976-08-31 Sealed Power Corporation Roller tappet
US4095460A (en) * 1976-07-20 1978-06-20 Cuff Calvin I Device for converting rotary motion into unidirectional motion
US4173954A (en) * 1977-12-13 1979-11-13 Speckhart Frank H Limited rotation roller tappet
US4339234A (en) * 1979-08-03 1982-07-13 Lucas Industries Limited Drive cam and follower for a liquid fuel injection pumping apparatus
US4326484A (en) * 1979-10-26 1982-04-27 Cummins Engine Company, Inc. Floating tappet guide plate
DE3039946A1 (en) * 1979-10-26 1981-05-07 Cummins Engine Co., Inc., 47201 Columbus, Ind. DEVICE FOR PREVENTING THE ROTATION OF PISTONS IN INTERNAL COMBUSTION ENGINES
FR2468729A1 (en) * 1979-10-26 1981-05-08 Cummins Engine Co Inc DEVICE FOR PREVENTING THE ROTATION OF PUSH BUTTONS IN AN INTERNAL COMBUSTION ENGINE
US4361120A (en) * 1980-05-02 1982-11-30 Sealed Power Corporation Roller tappet and method of making same
EP0202448A3 (en) * 1985-05-15 1987-12-16 Eaton Corporation Roller follower hydraulic tappet
EP0202448A2 (en) * 1985-05-15 1986-11-26 Eaton Corporation Roller follower hydraulic tappet
EP0221284A1 (en) * 1985-10-30 1987-05-13 Eaton Corporation Roller follower axle retention
DE3618240A1 (en) * 1986-05-30 1987-12-03 Kloeckner Humboldt Deutz Ag Lifting appliance
US4809651A (en) * 1988-04-04 1989-03-07 Gerchow James R Valve tappet apparatus
US4846121A (en) * 1988-10-05 1989-07-11 Ford Motor Company Variable friction roller tappets
US5022356A (en) * 1990-10-05 1991-06-11 Gear Company Of America, Inc. Roller valve lifter with anti-rotation member
US5010856A (en) * 1990-10-15 1991-04-30 Ford Motor Company Engine finger follower type rocker arm assembly
US5188068A (en) * 1991-02-04 1993-02-23 Crane Cams Roller tappet
DE4115670A1 (en) * 1991-05-14 1992-11-19 Bayerische Motoren Werke Ag IC engine with valve pushers protected against twisting - has profiled member partially U=shaped in cross=section and wrapping around web by cylinder head
DE4337952A1 (en) * 1993-11-06 1995-05-11 Schaeffler Waelzlager Kg Cam follower for a valve gear of an internal combustion engine
DE4444479A1 (en) * 1994-12-14 1996-06-20 Schaeffler Waelzlager Kg Cam follower for IC engine valve drive
US5546899A (en) * 1995-02-10 1996-08-20 Air Flow Research Heads, Inc. Valve train load transfer device for use with hydraulic roller lifters
US5678514A (en) * 1996-04-02 1997-10-21 Ford Global Technologies, Inc. Valve lifter retainer for an internal combustion engine
US5960758A (en) * 1998-05-05 1999-10-05 General Motors Corporation Roller cam follower bearing shaft retention
US5934232A (en) * 1998-06-12 1999-08-10 General Motors Corporation Engine valve lift mechanism
US6357407B2 (en) * 1998-12-01 2002-03-19 Competition Cams Anti-rotation valve lifter guide apparatus
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