US1979910A - Valve - Google Patents
Valve Download PDFInfo
- Publication number
- US1979910A US1979910A US489736A US48973630A US1979910A US 1979910 A US1979910 A US 1979910A US 489736 A US489736 A US 489736A US 48973630 A US48973630 A US 48973630A US 1979910 A US1979910 A US 1979910A
- Authority
- US
- United States
- Prior art keywords
- valve
- parts
- disc
- seat
- treatment
- 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
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000005121 nitriding Methods 0.000 description 7
- 230000008961 swelling Effects 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 101100272279 Beauveria bassiana Beas gene Proteins 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
Images
Classifications
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
-
- 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
- Y10T29/49314—Poppet or I.C. engine valve or valve seat making with assembly or composite article making
Definitions
- This invention relates to a combination of metals and the process of combining them.
- Another object of the invention is to provide an extremely hard seating part in a member tougher, less hard and for certain purposes more yielding.
- Another object is to provide in a tough and yielding member a much harder, unyielding part.
- Another object is to provide about a hard metal part a tougher metal part which surrounds, supports and compresses the harder part.
- Another object of the invention is to provide aprocess for forming, uniting and assembling the parts and members above mentionedand for providing a construction in which a relatively compression, in a tougher material and in which the hardness and the compression is caused by treatment after assembly.
- Figure 2 is a plan view of a disc
- Figure 3 is a cross section taken at line of Figure 2.
- A is a disc provided with a perforation A and araised boss A
- the boss A has an enlarged cavity A formed within it.
- the cavity A communicates with and forms in efiect a continuation of the perforation A
- the disc is preferably formed ,of chrome nickel steel. It is capable of heat treatment and when so treated may be held in the austenitic state.
- B is a seat plug member formed with a reduced portion B which is adapted to lie within the perforation A of the disc.
- B is a perforation through the seat plug.
- the seat plug is preferably made of a material which may be hardened and during treatment acquires a hard case B It is made preferably of low carbon steel with high aluminum content.
- C is a needle point or valve member. It is modified form of formed preferably with a cavity C and is prefbrittle and hard material is supported, under 1930, Serial No. 489,736
- D is a needle point member positioned within the cavity C and preferably sharpened at its exposed end or point as at D It is preferably 9 made of the same sort of material as the seat plug B, and as the case D In Figures 2 and 3 a. modified form is shown which differs from the form shown in Figure 1 in details of design and construction but is 5 preferably the same in materials used and in the manner in which they are treated.
- E is a disc provided with a perforation E and having a raised boss E which is hollowed out to provide a cavity E which communicates with 7 the perforation E.
- I F is a seat plug perforated as at F and seated within the cavity E. This disc may be used with a needle point similar to that shown in Figure 1.
- the disc and the main needle parts are preferably made of high chrome nickel steel which may be held in the austenitic state by heat treatment,
- the relatively soft seat plug or needle point is inserted in the disc or needle which is formed of a tough material which is of such construction and nature that 5 it will not be appreciably affected by nitrogen or by any nitriding process.
- the parts thus assembled they are treated with nitrogen. In one example, they are subjected tonitrogen at a temperature of approximately 900 F. This heat 9 treatment may be carried on for about four hours. After this treatment, the austenitic steel retains is strength but the relatively softer seat plug or needle point member will absorb nitrogen and become gradually very hard. It will also swell in p 5 size somewhat, the amount of swelling depending upon the time of heat treatment with the hot nitrogen. In the four hour treament a case of approximately .003 inch in thickness is formed on the nitrided parts.
- the seat plugs and the needle points formed in this fashion are extremely hard and they are under compression which may beas high as the material permits and is controlled largely by the a length of time of the treatment. 1 5
- the swelling of the nitridable member within the non-nitridable member occurs in response to the nitriding treatment and the amount of the swelling is controlled to some degree by the extent of the nitriding action.
- the amount of expansion or swelling can be controlled in part by controlling the extent of the nitriding action and under some conditions it can conveniently be done by controlling the amount 01' time during which the member is subjected to nitriding treatment.
- the parts may initially be made without very close fits and undue strain as the result of the imperfect fits in the finished product may be largely avoided and it is ordinarily necessary only to know the closeness of the fit to fix the extent to which the'nitriding process should be carried out.
- a seat carrying member formed of chrome nickel steel, and a seat member supported therein and formed of aluminum steel
- a valve closing member formed of aluminum steel and a carrying part therefor, formed of chromium nickel steel, the parts being assembled and subsequently nitrided, whereby the seat member and the closing member are provided with a nitrided case of extreme hardness and are further caused to expand within their respective holding parts.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Fuel-Injection Apparatus (AREA)
Description
P. L. SCOTT Nov. 6, 1934.
VALVE Filed Oct. 20, 1930 I72 "06 72 LL07 fz'zzjy [0026 5006a QAL Patented Nov. 6, 1934 VALVE Philip Lane Scott, San Mateo, Calif., assignor to Super Diesel Tractor Corporation,
La Porte,
Ind., a corporation of New York Application October 20,
' -1 Claim.
This invention relates to a combination of metals and the process of combining them.
It has for one object to provide an apparatus in which extremely hard parts are carried by 5 and-to some extent reinforced by tougher and less hard parts.
Another object of the invention is to provide an extremely hard seating part in a member tougher, less hard and for certain purposes more yielding.
Another object is to provide in a tough and yielding member a much harder, unyielding part.
Another object is to provide about a hard metal part a tougher metal part which surrounds, supports and compresses the harder part.
Another object of the invention is to provide aprocess for forming, uniting and assembling the parts and members above mentionedand for providing a construction in which a relatively compression, in a tougher material and in which the hardness and the compression is caused by treatment after assembly.
Other objects will appear from time to time in the course of the specification and claim.
My invention is illustrated more or less diagrammatically in the accompanying drawing, wherein- Figure 1 is a vertical cross section, a perforated disc and needle point closing the perforation;
Figure 2 is a plan view of a disc;
Figure 3 is a cross section taken at line of Figure 2.
Like parts are designated by like characters throughout the specification and drawing.
A is a disc provided with a perforation A and araised boss A The boss A has an enlarged cavity A formed within it. The cavity A communicates with and forms in efiect a continuation of the perforation A The disc is preferably formed ,of chrome nickel steel. It is capable of heat treatment and when so treated may be held in the austenitic state.
B is a seat plug member formed with a reduced portion B which is adapted to lie within the perforation A of the disc. B is a perforation through the seat plug. The seat plug is preferably made of a material which may be hardened and during treatment acquires a hard case B It is made preferably of low carbon steel with high aluminum content.
. C is a needle point or valve member. It is modified form of formed preferably with a cavity C and is prefbrittle and hard material is supported, under 1930, Serial No. 489,736
erably made of chrome nickel steel similar to or identical with the disc A.
D is a needle point member positioned within the cavity C and preferably sharpened at its exposed end or point as at D It is preferably 9 made of the same sort of material as the seat plug B, and as the case D In Figures 2 and 3 a. modified form is shown which differs from the form shown in Figure 1 in details of design and construction but is 5 preferably the same in materials used and in the manner in which they are treated.
E is a disc provided with a perforation E and having a raised boss E which is hollowed out to provide a cavity E which communicates with 7 the perforation E. I
I F is a seat plug perforated as at F and seated within the cavity E. This disc may be used with a needle point similar to that shown in Figure 1.
The manner in which the parts are assembled and formed is as follows:'
The disc and the main needle parts are preferably made of high chrome nickel steel which may be held in the austenitic state by heat treatment,
and the seat plug and needle point plug are preferably made of low carbon steel, having a relatively high aluminum content. The relatively soft seat plug or needle point is inserted in the disc or needle which is formed of a tough material which is of such construction and nature that 5 it will not be appreciably affected by nitrogen or by any nitriding process. With the parts thus assembled they are treated with nitrogen. In one example, they are subjected tonitrogen at a temperature of approximately 900 F. This heat 9 treatment may be carried on for about four hours. After this treatment, the austenitic steel retains is strength but the relatively softer seat plug or needle point member will absorb nitrogen and become gradually very hard. It will also swell in p 5 size somewhat, the amount of swelling depending upon the time of heat treatment with the hot nitrogen. In the four hour treament a case of approximately .003 inch in thickness is formed on the nitrided parts.
The seat plugs and the needle points formed in this fashion are extremely hard and they are under compression which may beas high as the material permits and is controlled largely by the a length of time of the treatment. 1 5
If now such needle points and seat plugs are used together, because of their great hardness the efiect of wear is reduced to a minimum. If fracture takes place in the heart of the material the 1 pieces are so tightly held together by the com- 110 of parts.
While I have illustrated the use of my process and my device in connection with a disc valve of a type adaptable for use in furnishing fuel for an internal-combustion engine,'it is obvious that my invention is not limited to this use and it might be applied to any type of valve and, in fact, to any use where it is advantageous to provide an extremely hard part in a relatively tougher surrounding part and my invention is, therefore, not to be considered as limited to its use or application in connection with an internal-combustion engine valve or a valve of any sort. a
As mentioned above the swelling of the nitridable member within the non-nitridable member occurs in response to the nitriding treatment and the amount of the swelling is controlled to some degree by the extent of the nitriding action. Thus the amount of expansion or swelling can be controlled in part by controlling the extent of the nitriding action and under some conditions it can conveniently be done by controlling the amount 01' time during which the member is subjected to nitriding treatment. t
By reason of the swelling or expanding caused by the nitriding treatment the parts may initially be made without very close fits and undue strain as the result of the imperfect fits in the finished product may be largely avoided and it is ordinarily necessary only to know the closeness of the fit to fix the extent to which the'nitriding process should be carried out.
I claim:
In combination in a valve assembly, a seat carrying member formed of chrome nickel steel, and a seat member supported therein and formed of aluminum steel, 'a valve closing member formed of aluminum steel and a carrying part therefor, formed of chromium nickel steel, the parts being assembled and subsequently nitrided, whereby the seat member and the closing member are provided with a nitrided case of extreme hardness and are further caused to expand within their respective holding parts.
PHILIP LANE SCO'I'I.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US489736A US1979910A (en) | 1930-10-20 | 1930-10-20 | Valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US489736A US1979910A (en) | 1930-10-20 | 1930-10-20 | Valve |
Publications (1)
Publication Number | Publication Date |
---|---|
US1979910A true US1979910A (en) | 1934-11-06 |
Family
ID=23945065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US489736A Expired - Lifetime US1979910A (en) | 1930-10-20 | 1930-10-20 | Valve |
Country Status (1)
Country | Link |
---|---|
US (1) | US1979910A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2955614A (en) * | 1956-03-01 | 1960-10-11 | Meynig Robert Edward | Constant tubing pressure choke |
US2973183A (en) * | 1958-06-12 | 1961-02-28 | New York Air Brake Co | Low friction sliding valve with edge-sealed ports |
FR2442387A1 (en) * | 1978-11-27 | 1980-06-20 | Waertsilae Oy Ab | PROCESS FOR SEALING A VALVE AND A VALVE USING THE SAME |
US4754950A (en) * | 1984-10-30 | 1988-07-05 | Kabushiki Kaisha Toshiba | Valve |
US4801095A (en) * | 1985-08-10 | 1989-01-31 | Robert Bosch Gmbh | Fuel injection nozzle for internal combustion engines |
-
1930
- 1930-10-20 US US489736A patent/US1979910A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2955614A (en) * | 1956-03-01 | 1960-10-11 | Meynig Robert Edward | Constant tubing pressure choke |
US2973183A (en) * | 1958-06-12 | 1961-02-28 | New York Air Brake Co | Low friction sliding valve with edge-sealed ports |
FR2442387A1 (en) * | 1978-11-27 | 1980-06-20 | Waertsilae Oy Ab | PROCESS FOR SEALING A VALVE AND A VALVE USING THE SAME |
US4754950A (en) * | 1984-10-30 | 1988-07-05 | Kabushiki Kaisha Toshiba | Valve |
US4801095A (en) * | 1985-08-10 | 1989-01-31 | Robert Bosch Gmbh | Fuel injection nozzle for internal combustion engines |
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