US3359615A - Method of making a die cast cylinder for internal combustion engines - Google Patents

Method of making a die cast cylinder for internal combustion engines Download PDF

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Publication number
US3359615A
US3359615A US263313A US26331363A US3359615A US 3359615 A US3359615 A US 3359615A US 263313 A US263313 A US 263313A US 26331363 A US26331363 A US 26331363A US 3359615 A US3359615 A US 3359615A
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US
United States
Prior art keywords
reinforcing elements
coating
core
casting
housing
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
Application number
US263313A
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English (en)
Inventor
Alfred F Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Farley Metals Inc
NL Industries Inc
Original Assignee
Nat Lead Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nat Lead Co filed Critical Nat Lead Co
Priority to US263313A priority Critical patent/US3359615A/en
Priority to SE13166/63A priority patent/SE300673B/xx
Priority to CH1579863A priority patent/CH418060A/fr
Priority to LU45079D priority patent/LU45079A1/xx
Priority to GB5627/64A priority patent/GB1006814A/en
Priority to DE19641433914 priority patent/DE1433914A1/de
Application granted granted Critical
Publication of US3359615A publication Critical patent/US3359615A/en
Assigned to FARLEY METALS, INC. reassignment FARLEY METALS, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: NL INDUSTRIES, INC. A NJ CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/02—Surface coverings of combustion-gas-swept parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0009—Cylinders, pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/106—Stators; Members defining the outer boundaries of the working chamber with a radial surface, e.g. cam rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B55/00—Internal-combustion aspects of rotary pistons; Outer members for co-operation with rotary pistons
    • F02B55/08—Outer members for co-operation with rotary pistons; Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
    • F02B2053/005—Wankel engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2730/00—Internal-combustion engines with pistons rotating or oscillating with relation to the housing
    • F02B2730/01—Internal-combustion engines with pistons rotating or oscillating with relation to the housing with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber
    • F02B2730/018—Internal-combustion engines with pistons rotating or oscillating with relation to the housing with one or more pistons in the form of a disk or rotor rotating with relation to the housing; with annular working chamber with piston rotating around an axis passing through the gravity centre, this piston or the housing rotating at the same time around an axis parallel to the first axis
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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
    • Y10T29/49231—I.C. [internal combustion] engine making
    • Y10T29/49234—Rotary or radial engine 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
    • Y10T29/4927—Cylinder, cylinder head or engine valve sleeve making

Definitions

  • This invention relates to cylinders or housings for rotary piston internal combustion engines and to a method of making same.
  • the invention is particularly directed to cylinders or housings which will permit higher engine outputs and much prolonged engine life. While the invention is of a special utility in connection with the trochoid cylinders or housings of so-called Wankel engines, it is useful in other engines as well where heat, pressure and corrosive fuel components create unusual problems.
  • the Walls of the trochoid housings are subject to extremely high localized temperatures and pressures.
  • combustion occurs repeatedly at a single area of the housing which never receives the benefit of cool gases between cycles as in a reciprocating engine.
  • These engines operate at relatively high speeds so that the application of heat to the housing wall at the combustion point is virtually continuous.
  • the cylinder is scavenged between power strokes and the heat of combustion is dissipated to the exhaust system as well as to the engine water jacket so that there is ample opportunity to provide adequate cooling.
  • the primary object of the present invention is to remove this limitation and to provide a housing having greatly improved heat transfer characteristics and strength characteristics at the critical or crucial points of the trochoid housing.
  • a pressure seal is used on the tips of the multi-lobe rotor which bears against the walls of the housing with a force that increases as the engine speed increases (see Wankel Patent 2,880,045).
  • the motion of the rotor is not uniform, but accelerates and decelerates as the rotor turns relative to the driving shaft. Because of this, the centrifugal force of the rotor seals vary and certain areas of the housing tend to wear more than others.
  • the wear resistance of the housing surface is an important factor in determining engine life.
  • One of the objects of the present invention is to improve the wearing qualities of the housing surface against which the rotor seals bear while the engine is in operation.
  • FIGURE 1 is a diagrammatic central, vertical, sec- "ice tional view of a portion of a die casting machine with the dies in place, ready for the injection of metal;
  • FIG. 2 is a central, vertical, sectional view of a reinforced trochoid housing constructed in accordance with the present invention
  • FIG. 3 is an enlarged transverse sectional view of a portion of a housing wall showing a modified form of reinforcing element
  • FIG. 4 is a perspective view of one form of reinforcing element shown in FIG. 2;
  • FIG. 5 is a perspective view of a coated die core ready for insertion in the die casting machine
  • FIG. 6 is a central, vertical, sectional view of a completed housing having reinforcing elements applied in the combustion chamber area only;
  • FIG. 7 is a sectional view taken on line 77 of FIG. 6.
  • the present invention comprises a method of die casting a trochoid housing for a rotary piston engine including the steps of providing a physical reinforcement at areas of high housing stress by overlaying those portions of a die core with reinforcing elements, covering said reinforcing elements with a metal having a higher melting point than the metal to be die cast, inserting the covered core in a die casting machine as a part of a die cavity, and casting metal of lower melting point such as aluminum or magnesium around and into intimate contact with the covered areas, whereby the reinforcing elements become cast into the housing.
  • Said reinforcing elements may serve the dual purpose of (a) conducting heat away from the area of the casting in which they are embedded and (b) adding greatly to the strength of such area against deflection and distortion.
  • the method of the present invention further comprises the application of a micro-porous coating or covering to the die core which is transplanted to the housing by the die casting operation and which is subsequently electroplated for wear resistance or to impart other desirable surface properties to the housing.
  • a micro-porous coat of a ferrous or cuprous alloy for example, accepts a chrome plate more readily and holds such plate more tenaciously than a dense non-porous body.
  • a molybdenum coat or plate also has highly desira-ble surface characteristics. The surface properties of the housing are thus greatly improved.
  • the trochoid housing is indicated generally at 10 and includes cooling fins 11 die cast integral therewith in a pattern and spacing determined by the engine designer. If the housing is water cooled as in some engines, the fins will, of course, be replaced by water jackets. Inasmuch as the present invention pertains to the engine housing, no disclosure has been made of the rotor, gearing, bearings or other elements.
  • the housing 10 At the top of the housing 10, provision is made for the seating of a spark plug or fuel injector in a radial boss 12. If the rotor rotation is clockwise with respect to the housing in the position shown in the drawings, the part of the housing immediately beyond the spark plug or injector boss 12 represents an area at which combustion occurs.
  • the intake and exhaust ports of the engine are not shown since they are usually disposed in one of the side cover plates that are bolted to the housing and are controlled by the face of the rotor.
  • the exhaust ports occur at about around the housing from the combustion chamber.
  • the housing part that serves as the combustion chamber never receives the benefit of a flow of cooling gases as in a normal reciprocating fourstroke cycle engine.
  • the temperature of this part runs higher than the remainder of the housing and limits the power output of the engine by limiting the quantity of fuel that can be burned without destroying the housing. As more and more heat enters the cycle with 1 increased fuel the higher will be the operating tempera- 3 ture of the housing. If the housing is an aluminum alloy die casting, its physical properties will deteriorate as the temperature increases.
  • the present invention is directed to a housing, and a method of making same, which overcomes the aforementioned difiiculty by reinforcing the housing at the critical area or areas.
  • FIGURE 1 shows diagrammatically, a die for making the improved housing, in place in a die casting machine.
  • the die includes a cover half 13, an ejector half 14 and side cores 15 and 16 to form the fins 11.
  • a shot plunger 17 forces metal from a shot sleeve 18 through an appropriate gate 19 into the die cavity.
  • a die core 20 is removably seated in one of the die halves, being shown in the ejector half and held in place by an extension 21 which fits immediately in a socket 22 in the die body.
  • Ejector pins 23 are shown diagrammatically for removing a completed casting.
  • the die core 20 is initially coated with a metal having a higher melting point than aluminum.
  • This metal is preferably a ferrous alloy and is applied by a spray method so that as deposited, the, metal layer contains not only the ferrous metal but oxides thereof.
  • the metal layer is designated generally 24. Brass or other copper containing alloy may also be deposited on the core in certain instances, particularly when the added step of electro-plating the interior of the housing is to be employed.
  • reinforcing members are applied thereto.
  • the reinforcing members may comprise structural shapes such as angles, bars, Ts or channel shapes as shown in FIG. 2 or may comprise a circumferentially extending wire 26 as shown in FIG. 3.
  • a third form of structural reinforcing member comprises a corrugated sheet of expanded metal or perforated metal as shown in FIG. 5.
  • the structural shapes used as reinforcing members 25 may also be made of a ferrous metal. If such a metal is selected, the bars or shapes may be magnetized for temporary adherence to the metal layer 24. The core 20 with the reinforcing elements adhering thereto is then sprayed again with metal to unite the reinforcing elements to the layer 24. If the initial layer 24 is, for example, 0.020" thick, only a very thin layer of a few thousandths of an inch need be added to anchor the reinforcing elements in place. The metal layer that is applied over the reinforcing elements need only be thick enough to anchor them temporarily until the metal is die cast around the coated core. If the disposition of the reinforcing elements in the die with respect to the gate is such that the pressure of the incoming metal would tend to displace them, the added anchoring coat should be heavier.
  • the reinforcing wire may be wound around the core 20 while it is still in the coating machine.
  • the wire is applied over a predetermined thickness of coating metal 24. and held in place by additional metal of the same or different composition.
  • the wire is preferably of a ferrous alloy.
  • the corrugated and perforated sheet designated 26 is attached to the coating by spraying additional coating metal around and over the segments, but not filling all of the grooves and interstices therein.
  • the die cast metal will be forced under and around the reinforcing segments as shown in the sectional view, FIG. 7.
  • the reinforcement obtained by this form of the invention is especially advantageous for a localized area.
  • the core is placed in the die, the shot made, and the completed casting removed as shown and described in my co-pending application Ser. No. 811,611.,now Patent No. 3,083,424.
  • the metal coat 24 will 4 be found to transplant from the core 20 to form the inner wall of the housing 10.
  • the running surface swept by the engine rotor is subject to wear by friction imposed by the rotor seals and it is desirable to improve the wearing qualities of this surface. It has been found that the metalized coating applied by spraying is micro-porous even though the interior is smooth to about 15 R.M.S. The porosity is very fine, but is sufficient to provide a very effective holding surface for plating of a desired friction-resisting metal such as chromium or molybdenum. Chrome plating of engine cylinders has been a common expedient in recent years, but in the past the plating has been applied directly to the cast metal. If the cylinder is cast in aluminum, it is more difficult to obtain a satisfactory plate than if the cylinder were to be cast in a ferrous metal.
  • the present invention provides, in effect, an aluminum cylinder with a ferrous (or cuprous) face to be plated and has all of the desirable properties of cylinders of both metals. While the improvement of wearing qualities is of significant importance in the trochoid housing above described, it has also been found that the wearing qualities of a cylinder for a reciprocating engine can likewise be improved by chrome plating the microporous transplanted coat.
  • the method of making a reinforced light metal cylinder for an internal combustion engine which includes depositing a coating of a metal having a higher melting point than the light metal on a core piece, applying reinforcing elements over said coating on at least those areas where high stress occurs during engine operation, depositing additional coating material over at least portions of said reinforcing elements to retain their position with respect to said core piece, introducing the core piece with the coating and reinforcing elements thereon into a die casting die, casting light metal around said core and reinforcing elements under die casting pressures to embed said reinforcing elements and to unite the light metal with the exposed surface of said coating, and stripping said casting from said core whereby said coating and reinforcing elements remain with said casting and said core can be returned for subsequent casting cycles.
  • the method of making a reinforced light metal cylinder for an internal combustion engine which includes, depositing a coating of a ferrous metal alloy having a higher melting point than the light metal on a core piece, magnetizing magnetizable ferrous alloy reinforcing elements, applying said magnetized reinforcing elements over said coating on at least those areas where high stress occurs during engine operation, depositing additional coating material over at least portions of said reinforcing elements to ret in heir position with respect to said core piece, introducing the core piece With the coating and reinforcing elements thereon into a die casting die, casting light metal around said core and reinforcing elements under die casting pressures to embed said reinforcing elements and to unite the light metal with the exposed surface of said coating, and stripping said casting from said core whereby said coating and reinforcing elements remain with said casting and said core can be returned for subsequent casting cycles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
US263313A 1963-03-06 1963-03-06 Method of making a die cast cylinder for internal combustion engines Expired - Lifetime US3359615A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US263313A US3359615A (en) 1963-03-06 1963-03-06 Method of making a die cast cylinder for internal combustion engines
SE13166/63A SE300673B (cg-RX-API-DMAC7.html) 1963-03-06 1963-11-28
CH1579863A CH418060A (fr) 1963-03-06 1963-12-21 Procédé de fabrication d'un cylindre renforcé en métal léger pour moteur à combustion interne à piston rotatif
LU45079D LU45079A1 (cg-RX-API-DMAC7.html) 1963-03-06 1963-12-21
GB5627/64A GB1006814A (en) 1963-03-06 1964-02-11 Die cast housings for rotary piston internal combustion engines and method of makingsame
DE19641433914 DE1433914A1 (de) 1963-03-06 1964-03-04 Verfahren zur Herstellung eines aus einem Aluminiumgusskoerper bestehenden Trochoidzylindergehaeuses fuer Rotationskolbenmaschinen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US263313A US3359615A (en) 1963-03-06 1963-03-06 Method of making a die cast cylinder for internal combustion engines

Publications (1)

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US3359615A true US3359615A (en) 1967-12-26

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US263313A Expired - Lifetime US3359615A (en) 1963-03-06 1963-03-06 Method of making a die cast cylinder for internal combustion engines

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US (1) US3359615A (cg-RX-API-DMAC7.html)
CH (1) CH418060A (cg-RX-API-DMAC7.html)
DE (1) DE1433914A1 (cg-RX-API-DMAC7.html)
GB (1) GB1006814A (cg-RX-API-DMAC7.html)
LU (1) LU45079A1 (cg-RX-API-DMAC7.html)
SE (1) SE300673B (cg-RX-API-DMAC7.html)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886637A (en) * 1971-11-17 1975-06-03 Chromalloy American Corp Method of producing heat treatable titanium carbide tool steel coatings on cylinders of internal combustion engines
US3892028A (en) * 1972-02-01 1975-07-01 Daimler Benz Ag Method for producing a housing casing for a rotary piston internal combustion engine
US3920360A (en) * 1974-05-30 1975-11-18 Gen Motors Corp Aluminum-iron composite rotor housing for a rotary combustion engine and method of making the same
US3973883A (en) * 1972-07-25 1976-08-10 Vandervell Products Limited Rotary piston machines
US4044589A (en) * 1973-07-20 1977-08-30 Vandervell Products Limited Rotary piston machines
FR2668403A1 (fr) * 1990-10-30 1992-04-30 Peugeot Insert metallique a la coulee dans une culasse de moteur a combustion interne.
US20090250036A1 (en) * 2008-03-09 2009-10-08 Jonathan Lauter Rotary Engine
US20100300394A1 (en) * 2009-05-28 2010-12-02 Gm Global Technology Operations, Inc. Metal alloy castings with cast-in-place tubes for fluid flow
CN111287842A (zh) * 2018-12-07 2020-06-16 通用汽车环球科技运作有限责任公司 具有受控径向热膨胀的发动机壳体和发动机组件

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4099490A (en) * 1972-02-01 1978-07-11 Daimler-Benz Aktiengesellschaft Method for producing a housing casing for a rotary piston internal combustion engine
EP0424109A3 (en) * 1989-10-18 1991-10-02 Izumi Industries Ltd. Aluminium alloy matrix composite for internal combustion engines
DE19737601A1 (de) * 1997-08-28 1999-03-04 Bayerische Motoren Werke Ag Verfahren zur Steigerung der Dämpfung eines Gußbauteiles aus einem Leichtmetallwerkstoff

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US868785A (en) * 1905-11-13 1907-10-22 Eugene Malcolm Johnson Composite pipe.
US1021180A (en) * 1911-01-19 1912-03-26 Archer E Clifton Construction of rotary blowers and pumps.
US1271211A (en) * 1916-04-19 1918-07-02 Berlin Mills Company Manufacture of pipes, tubes, and like hollow bodies.
US1293341A (en) * 1917-11-20 1919-02-04 Louis Coatalen Cylinder for internal-combustion engines.
US1516911A (en) * 1923-06-13 1924-11-25 Canfield Wallace Reenforcing sleeve for rotary drill pipe
US1830202A (en) * 1930-05-29 1931-11-03 American Concrete Pipe Co Reenforcement cage
US2769226A (en) * 1950-04-24 1956-11-06 Studebaker Packard Corp Method of welding cylinder to head
US2805683A (en) * 1950-02-17 1957-09-10 Lock Joint Pipe Co Pipe and method for making the same
US2938260A (en) * 1954-04-02 1960-05-31 Curtiss Wright Corp Method of fabricating cylinder barrels
US2988065A (en) * 1958-03-11 1961-06-13 Nsu Motorenwerke Ag Rotary internal combustion engine
US3083424A (en) * 1959-05-07 1963-04-02 Nat Lead Co Method for producing coated die castings
US3155313A (en) * 1962-10-01 1964-11-03 Cuertiss Wright Corp Rotor housing construction of rotating combustion engine
US3289649A (en) * 1963-09-26 1966-12-06 Daimler Benz Ag Rotary piston engine

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US868785A (en) * 1905-11-13 1907-10-22 Eugene Malcolm Johnson Composite pipe.
US1021180A (en) * 1911-01-19 1912-03-26 Archer E Clifton Construction of rotary blowers and pumps.
US1271211A (en) * 1916-04-19 1918-07-02 Berlin Mills Company Manufacture of pipes, tubes, and like hollow bodies.
US1293341A (en) * 1917-11-20 1919-02-04 Louis Coatalen Cylinder for internal-combustion engines.
US1516911A (en) * 1923-06-13 1924-11-25 Canfield Wallace Reenforcing sleeve for rotary drill pipe
US1830202A (en) * 1930-05-29 1931-11-03 American Concrete Pipe Co Reenforcement cage
US2805683A (en) * 1950-02-17 1957-09-10 Lock Joint Pipe Co Pipe and method for making the same
US2769226A (en) * 1950-04-24 1956-11-06 Studebaker Packard Corp Method of welding cylinder to head
US2938260A (en) * 1954-04-02 1960-05-31 Curtiss Wright Corp Method of fabricating cylinder barrels
US2988065A (en) * 1958-03-11 1961-06-13 Nsu Motorenwerke Ag Rotary internal combustion engine
US3083424A (en) * 1959-05-07 1963-04-02 Nat Lead Co Method for producing coated die castings
US3155313A (en) * 1962-10-01 1964-11-03 Cuertiss Wright Corp Rotor housing construction of rotating combustion engine
US3289649A (en) * 1963-09-26 1966-12-06 Daimler Benz Ag Rotary piston engine

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886637A (en) * 1971-11-17 1975-06-03 Chromalloy American Corp Method of producing heat treatable titanium carbide tool steel coatings on cylinders of internal combustion engines
US3892028A (en) * 1972-02-01 1975-07-01 Daimler Benz Ag Method for producing a housing casing for a rotary piston internal combustion engine
US3973883A (en) * 1972-07-25 1976-08-10 Vandervell Products Limited Rotary piston machines
US4044589A (en) * 1973-07-20 1977-08-30 Vandervell Products Limited Rotary piston machines
US3920360A (en) * 1974-05-30 1975-11-18 Gen Motors Corp Aluminum-iron composite rotor housing for a rotary combustion engine and method of making the same
FR2668403A1 (fr) * 1990-10-30 1992-04-30 Peugeot Insert metallique a la coulee dans une culasse de moteur a combustion interne.
EP0484197A1 (fr) * 1990-10-30 1992-05-06 Automobiles Peugeot Culasse de moteur à combustion interne munie d'un insert métallique disposé à la coulée
US20090250036A1 (en) * 2008-03-09 2009-10-08 Jonathan Lauter Rotary Engine
US8033264B2 (en) * 2008-03-09 2011-10-11 Rotary Power LLC Rotary engine
US20100300394A1 (en) * 2009-05-28 2010-12-02 Gm Global Technology Operations, Inc. Metal alloy castings with cast-in-place tubes for fluid flow
CN111287842A (zh) * 2018-12-07 2020-06-16 通用汽车环球科技运作有限责任公司 具有受控径向热膨胀的发动机壳体和发动机组件

Also Published As

Publication number Publication date
DE1433914A1 (de) 1968-11-28
CH418060A (fr) 1966-07-31
GB1006814A (en) 1965-10-06
DE1433914B2 (cg-RX-API-DMAC7.html) 1970-09-10
SE300673B (cg-RX-API-DMAC7.html) 1968-05-06
LU45079A1 (cg-RX-API-DMAC7.html) 1964-06-21

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