US2101917A - Method for making valve tappets - Google Patents
Method for making valve tappets Download PDFInfo
- Publication number
- US2101917A US2101917A US3456A US345635A US2101917A US 2101917 A US2101917 A US 2101917A US 3456 A US3456 A US 3456A US 345635 A US345635 A US 345635A US 2101917 A US2101917 A US 2101917A
- Authority
- US
- United States
- Prior art keywords
- core
- tappet
- head
- stem
- disc
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
-
- 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
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49298—Poppet or I.C. engine valve or valve seat making
- Y10T29/49304—Valve tappet making
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49298—Poppet or I.C. engine valve or valve seat making
- Y10T29/49307—Composite or hollow valve stem or head making
- Y10T29/49313—Composite or hollow valve stem or head making including casting
Definitions
- This invention relates to a method of making a valve tappet, and it is the prime object of the invention to provide a tappet which can be readily and economically manufactured, which is of minimum weight, and which has the necessary characteristics to insure a maximum life of bearing surfaces in an economical and eificient manner.
- Another object of the invention is to provide a method of making a tappet structure in which the various parts are rigidly united in one rugged and solid structure, and which requires no machine work other than grinding to finish.
- Another object is to provide a rugged tappet which readily withstands the sharp impacts to which tappets are subjected when used in internal combustion engines, and which is provided with means for deadening noise occasioned by the mechanical operation of the tappet.
- a further object is to provide a method of manufacture which is simple, practical, and economical, which requires a minimum of finish or machine work, and which provides a rigid onepiece unitary structure when assembled.
- FIG. 1 is a side view of my improved valve tappet.
- Fig. 2 is a central sectional longitudinal view through the tappet.
- Fig. 3 is a top plan view.
- Fig. 4 is a sectional view illustrating the casting of the head with the core inserted.
- Fig. 5 is a side view of the core.
- Fig. 6 is a plan view thereof.
- Fig. 7 is an opposite end View.
- Fig. 8 is a fragmentary part sectional view similar to Fig. 2, showing the one end of the stem formed similar to the core.
- Fig. 9 is a fragmentary view of the stem before the head has been cast thereon.
- the numeral Ill indicates a core member preferably cylindrical in shape and formed with a centrally disposed opening I l as shown.
- This is preferably formed from stock of uniform size and is turned to various diameters, the reduced section l2 terminating in an enlarged upper rim or flange I3, in which a plurality of spaced apart slots [4 are formed, these slots extending through the rim and section I 2 down to the section I5 which is of larger diameter than the section [2, the lower end N5 of the core being of approximately the same diameter as the upper rim or flange.
- cores are formed on automatic machines and are in turn cast in the head of the tappet, a preferably copper disc I! being pressed in the neck of the core, said disc limiting the flow of metal and deadens noise when the tappet is operating in an engine.
- the core Ill is first placed in a suitable flask l8 which is usually of disc shaped form, the moulten metal which forms the head being indicated at Hi. This moulten metal is poured into the flask, filling the slots and centrally disposed openingup to the copper disc l1, and when the metal cools, the core will be firmly anchored and embedded, forming a rigid unitary structure which requires no machining other than finish grinding.
- the projecting end It of the core forms a neck, the face 20 of which provides a smooth surface to which the end of a stem member 2
- the core proper may be in the form of a stamping if desired and that the head l9 can be cast thereon, after which it is welded to the stem in the usual manner.
- the method of forming a 'tappet which includes providing a hollow core, placing said core in a flask and casting a head upon one end portion thereof, so as to leave a hollow portion of the core exposed beyond the head, and then welding a stem to said hollow exposed end of the core.
- the method of forming a tappet which includes forming a tubular core, inserting a sound deadening disc in the core at a point intermediate the ends thereof to divide the same into hollow end portions, placing the core in a flask and casting a head upon one end thereof so that the material of the head extends in the hollow to said disc, and then welding a stem to the other exposed hollow end of the core.
- the method of forming a tappet which consists in first forming a tubular core with one shouldered and slotted end, inserting a sound ,deadening disc in the core intermediate the ends thereof, placing the core in a flask and casting a head on the shouldered and slotted end thereof 1 to fill the same at one side of the disc, welding a stem to the exposed projecting end of the core in a manner to leave the same unfilled at the opposite side of the disc, and then finish grinding said tappet.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Description
Dec. 14, 1937. A. s PLATER 2,101,917
METHOD FOR MAKING -VALVE TAPPETS Filed Jan. 25, 1935 ATTORNEY.
Patented Dec. 14, 1937 UNITED STATES PATENT OFFlCE 2,101,917 7 METHOD FOR MAKING VALVE TAPPETS Albert splitter, Saginaw, Mich. Application January 25,1935, Serial No. 3,456
4 Claims. (o1. 23456.7)
This invention relates to a method of making a valve tappet, and it is the prime object of the invention to provide a tappet which can be readily and economically manufactured, which is of minimum weight, and which has the necessary characteristics to insure a maximum life of bearing surfaces in an economical and eificient manner.
Another object of the invention is to provide a method of making a tappet structure in which the various parts are rigidly united in one rugged and solid structure, and which requires no machine work other than grinding to finish.
Another object is to provide a rugged tappet which readily withstands the sharp impacts to which tappets are subjected when used in internal combustion engines, and which is provided with means for deadening noise occasioned by the mechanical operation of the tappet.
A further object is to provide a method of manufacture which is simple, practical, and economical, which requires a minimum of finish or machine work, and which provides a rigid onepiece unitary structure when assembled.
The above and other objects will appear as the specification progresses, reference being had to the accompanying drawing in which I have shown the preferred embodiment of my invention, and in which like reference numerals indicate like parts throughout the several views thereof.
In the drawing- Fig. 1 is a side view of my improved valve tappet.
Fig. 2 is a central sectional longitudinal view through the tappet.
Fig. 3 is a top plan view.
Fig. 4 is a sectional view illustrating the casting of the head with the core inserted.
Fig. 5 is a side view of the core.
Fig. 6 is a plan view thereof.
Fig. 7 is an opposite end View.
Fig. 8 is a fragmentary part sectional view similar to Fig. 2, showing the one end of the stem formed similar to the core.
Fig. 9 is a fragmentary view of the stem before the head has been cast thereon.
Referring now more specifically to Figs. 1 to 7 of the drawing, the numeral Ill indicates a core member preferably cylindrical in shape and formed with a centrally disposed opening I l as shown. This is preferably formed from stock of uniform size and is turned to various diameters, the reduced section l2 terminating in an enlarged upper rim or flange I3, in which a plurality of spaced apart slots [4 are formed, these slots extending through the rim and section I 2 down to the section I5 which is of larger diameter than the section [2, the lower end N5 of the core being of approximately the same diameter as the upper rim or flange.
These cores are formed on automatic machines and are in turn cast in the head of the tappet, a preferably copper disc I! being pressed in the neck of the core, said disc limiting the flow of metal and deadens noise when the tappet is operating in an engine. In forming the head, the core Ill is first placed in a suitable flask l8 which is usually of disc shaped form, the moulten metal which forms the head being indicated at Hi. This moulten metal is poured into the flask, filling the slots and centrally disposed openingup to the copper disc l1, and when the metal cools, the core will be firmly anchored and embedded, forming a rigid unitary structure which requires no machining other than finish grinding.
In the construction shown in Figs. 1 to 7 inclusive the projecting end It of the core forms a neck, the face 20 of which provides a smooth surface to which the end of a stem member 2| is welded, and this stem can be solid, or can be hollow as shown in the drawing hereunto annexed, the opposite end of the stem being shouldered as at 22 and is internally threaded as at 23 to receive the usual adjustment screw (not shown).
In Figs. 8 and 9 of the drawing I have shown the end ofthe stem turned to substantially the same shape as the core l0, and this is treated in exactly the same manner, the disc I! being inserted in the neck, after which the turned end of the stem is placed in the flask and the head I9 cast thereon. Such construction eliminates any welding operation, and thereby materially lessens the cost of manufacture.
It will, of course, be obvious that the core proper may be in the form of a stamping if desired and that the head l9 can be cast thereon, after which it is welded to the stem in the usual manner.
This method and construction has many advantages over the conventional tappets in general use, inasmuch as the entire head can be uniformly chilled due to the fact that no machining is necessary after the head is cast in position. It provides a substantial unitary structure, the neck of which is rigid and strong, and. the entire tap pet requires no machining other than finish grinding, making it very economical to manufacture.
From the foregoing description it will be obvious that I have perfected a very simple, practical, and inexpensive tappet and method of producing it.
What I claim is:
1. The method of forming a 'tappet which includes providing a hollow core, placing said core in a flask and casting a head upon one end portion thereof, so as to leave a hollow portion of the core exposed beyond the head, and then welding a stem to said hollow exposed end of the core.
2. The method of forming a tappet which includes forming a tubular core, inserting a sound deadening disc in the core at a point intermediate the ends thereof to divide the same into hollow end portions, placing the core in a flask and casting a head upon one end thereof so that the material of the head extends in the hollow to said disc, and then welding a stem to the other exposed hollow end of the core.
3. The method of forming a tappet which inhollow end portions, placing the core in a flask and casting a head around one end portionv thereof to fill the same at one side of the disc, and then welding a stem to the other end of said core in a manner to leave the other hollow end portion unfilled.
4. The method of forming a tappet which consists in first forming a tubular core with one shouldered and slotted end, inserting a sound ,deadening disc in the core intermediate the ends thereof, placing the core in a flask and casting a head on the shouldered and slotted end thereof 1 to fill the same at one side of the disc, welding a stem to the exposed projecting end of the core in a manner to leave the same unfilled at the opposite side of the disc, and then finish grinding said tappet.
ALBERT S. PLATER.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3456A US2101917A (en) | 1935-01-25 | 1935-01-25 | Method for making valve tappets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3456A US2101917A (en) | 1935-01-25 | 1935-01-25 | Method for making valve tappets |
Publications (1)
Publication Number | Publication Date |
---|---|
US2101917A true US2101917A (en) | 1937-12-14 |
Family
ID=21705961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US3456A Expired - Lifetime US2101917A (en) | 1935-01-25 | 1935-01-25 | Method for making valve tappets |
Country Status (1)
Country | Link |
---|---|
US (1) | US2101917A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2471936A (en) * | 1944-01-21 | 1949-05-31 | Thompson Prod Inc | Method of making poppet valves |
US2734495A (en) * | 1956-02-14 | yielding spacer | ||
US2809407A (en) * | 1955-02-11 | 1957-10-15 | Gen Motors Corp | Method of making a composite metal article |
US2988805A (en) * | 1954-07-29 | 1961-06-20 | Earl A Thompson | Art of making a tappet |
US3149410A (en) * | 1960-11-02 | 1964-09-22 | Gen Motors Corp | Valve lifter |
US3182362A (en) * | 1961-12-12 | 1965-05-11 | Berg Airlectro Products Co | Method of forming a member and shaft assembly |
US3209437A (en) * | 1962-04-13 | 1965-10-05 | Voorhies Carl | Method of securing together two members |
-
1935
- 1935-01-25 US US3456A patent/US2101917A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2734495A (en) * | 1956-02-14 | yielding spacer | ||
US2471936A (en) * | 1944-01-21 | 1949-05-31 | Thompson Prod Inc | Method of making poppet valves |
US2988805A (en) * | 1954-07-29 | 1961-06-20 | Earl A Thompson | Art of making a tappet |
US2809407A (en) * | 1955-02-11 | 1957-10-15 | Gen Motors Corp | Method of making a composite metal article |
US3149410A (en) * | 1960-11-02 | 1964-09-22 | Gen Motors Corp | Valve lifter |
US3182362A (en) * | 1961-12-12 | 1965-05-11 | Berg Airlectro Products Co | Method of forming a member and shaft assembly |
US3209437A (en) * | 1962-04-13 | 1965-10-05 | Voorhies Carl | Method of securing together two members |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2101917A (en) | Method for making valve tappets | |
US1848083A (en) | Method of forming valve tappets | |
US2480966A (en) | Apparatus for making cast bodies with inserted coils | |
US3237480A (en) | Reinforced casting and method for making the same | |
US1835863A (en) | Method of forming pistons | |
US1829900A (en) | Golf club | |
US2677160A (en) | Core box dowel pin | |
US3456330A (en) | Method of making and assembling a dead-blow hammerhead | |
US2324006A (en) | Valve tappet | |
US2032906A (en) | Valve tappet | |
US1606181A (en) | Valve tappet | |
US1345943A (en) | George l | |
US2037340A (en) | Composite metal article of manufacture | |
US1905879A (en) | Valve seat ring driver | |
US1570023A (en) | Cam follower and method of making same | |
US2232526A (en) | Mold for casting a brake head | |
US1619901A (en) | Method of making two-piece valves | |
US1547125A (en) | Valve manufacture | |
US1987048A (en) | Chaplet | |
US2143176A (en) | Valve tappet and method of making same | |
US1695981A (en) | Method of making valve tappets | |
US408632A (en) | Thirds to john n | |
US1710996A (en) | Method of making valve tappets | |
US1710997A (en) | Process of making valve tappets | |
US2118446A (en) | Method of making tappets |