Patent US3920360A successfully refreshed from Google Patents.
US3920360A
Expired / Lapsed
US
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Aluminum-iron composite rotor housing for a rotary combustion engine and method of making the same
Assignee: Motors Liquidation Co
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Filing: 1974-05-30
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Granted: 1975-11-18
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Expires: 1994-05-30
Abstract
Abstract An aluminum rotor housing, having a chromium plated steel liner inner surface, is formed in a preferred embodiment hereof by first providing a thin steel strip with a thin, porous layer of copper and nickel powder metallurgically bonded to one surface. The strip is then shaped to define the generally epitrochoidal inner surface of the housing of a Wankel type rotary engine with the ends of the strip welded together and the porous layer on the outside. The shaped strip then is positioned on a core member in a die casting machine and a suitable aluminum alloy is cast into and over the porous layer bonded to the steel strip, thereby infiltrating the porous layer and forming a main body portion of the housing mechanically bonded to a steel liner portion. A coating of chromium may then be electroplated or otherwise applied to the steel liner to provide a hard, strong wear surface in the operation of a rotary combustion engine.
Inventors
- 👤 Carl A Bierlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:12
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/10; F01C21/104; F01C21/106; B; B22; B22D; B22D19/00; B22D19/0009; B22D19/0081; B23; B23P; B23P15/00; F02; F02B; F02B53/00; F02B2053/005; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49231; Y10T29/49234; Y10T29/4998; Y10T29/49982; Y10T29/49984
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
A COMPOSITE ROTOR HOUSING MEMBER FOR A ROTORY ENGINE OF THE TYPE CHARACTERIZED BY A ROTOR HOUSING DEFINING A CLOSED PERIPHERAL SURFACE, A SIDE HOUSING MEMBER ON EACH SIDE OF SAID ROTOR HOUSING, SAID ROTOR HOUSING AND SIDE HOUSING MEMBERS COOPERATING TO DEFINE A CAVITY IN WHICH A ROTARY PISTON IS ROTATABLY MOUNTED IN SEALING ENGAGEMENT WITH SAID PERIPHERAL SURFACE, A SAID ROTOR HOUSING MEMBER COMPRISING: AN ALUMINUM OR ALUMINUM ALLOY DIE CAST BODY PORTION HAVING A FERROUS METAL LINER ON THE INNER SURFACE OF SAID BODY PORTION, SAID LINER DEFINING THE CONFIGURATION OF A SAID PERIPHERAL SURFACE OF SAID ROTOR CAVITY, AND AN INTERMEDIATE SPONGE-LIKE LAYER OF COPPER BRAZED METAL PARTICLES FUSED TO EACH OTHER AND TO SAID FERROUS METAL LINER, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON AND NICKEL, THE ALUMINUM BODY PORTION PENETRATING PORES
Claim 2
Dependent Claim
140 words
A COMPOSITE ROTOR HOUSING MEMBER FOR A ROTORY ENGINE OF THE TYPE CHARACTERIZED BY A ROTOR HOUSING DEFINING A CLOSED PERIPHERAL SURFACE, A SIDE HOUSING MEMBER ON EACH SIDE OF SAID ROTOR HOUSING, SAID ROTOR HOUSING AND SIDE HOUSING MEMBERS COOPERATING TO DEFINE A CAVITY IN WHICH A ROTARY PISTON IS ROTATABLY MOUNTED IN SEALING ENGAGEMENT WITH SAID PERIPHERAL SURFACE, A SAID ROTOR HOUSING MEMBER COMPRISING: AN ALUMINUM OR ALUMINUM ALLOY DIE CAST BODY PORTION HAVING A FERROUS METAL LINER ON THE INNER SURFACE OF SAID BODY PORTION, SAID LINER DEFINING THE CONFIGURATION OF A SAID PERIPHERAL SURFACE OF SAID ROTOR CAVITY, AND AN INTERMEDIATE SPONGE-LIKE LAYER OF COPPER BRAZED METAL PARTICLES FUSED TO EACH OTHER AND TO SAID FERROUS METAL LINER, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON AND NICKEL, THE ALUMINUM BODY PORTION PENETRATING PORES
Claim 3
Dependent Claim
160 words
A composite rotor housing member for a rotary engine of the type characterizeD by a rotor housing defining a closed peripheral surface, a side housing member on each side of said rotor housing, said rotor housing and side housing members cooperating to define a cavity in which a rotary piston is rotatably mounted in sealing engagement with said peripheral surface, a said rotor housing member comprising: an aluminum or aluminum alloy die cast body portion having a carbon steel liner on the inner surface of said body portion, said liner defining the configuration of a said peripheral surface of a said rotor cavity, and an intermediate sponge-like layer of copper brazed metal particles fused to each other and to said steel liner, said metal being selected from the group consisting of iron and nickel, the aluminum body portion penetrating pores between particles of said intermediate layer in a strong coextensive interlocking mechanical and heat conductive bond with said steel liner.
Claim 4
Dependent Claim
160 words
A composite rotor housing member for a rotary engine of the type characterizeD by a rotor housing defining a closed peripheral surface, a side housing member on each side of said rotor housing, said rotor housing and side housing members cooperating to define a cavity in which a rotary piston is rotatably mounted in sealing engagement with said peripheral surface, a said rotor housing member comprising: an aluminum or aluminum alloy die cast body portion having a carbon steel liner on the inner surface of said body portion, said liner defining the configuration of a said peripheral surface of a said rotor cavity, and an intermediate sponge-like layer of copper brazed metal particles fused to each other and to said steel liner, said metal being selected from the group consisting of iron and nickel, the aluminum body portion penetrating pores between particles of said intermediate layer in a strong coextensive interlocking mechanical and heat conductive bond with said steel liner.
Claim 5
Independent Claim
181 words
A method of forming a composite rotor housing member for a rotary engine comprising: providing a ferrous metal strip, depositing a loose but uniformly mixed powder composition comprising copper and a material taken from the group consisting of iron and nickel in a thin layer on a surface of said strip, heating said powder mixture to fuse the copper portion thereof and bond the other metal particles to each other and to said strip in an adherent porous sponge layer, cutting said strip, if necessary, to a desired predetermined length and shaping it to define the closed inner surface portion of a said housing member, the ends of said strip then being in abutting relationship and said sintered layer being on the outside surface of said strip, joininig the abutting ends of said strip, and die casting aluminum metal around the shaped ferrous metal strip member to form the body portion of a said housing member on said ferrous strip member, molten aluminum permeating said porous sponge layer to form upon solidification a strong bond with said ferrous metal strip liner.
Claim 6
Independent Claim
181 words
A method of forming a composite rotor housing member for a rotary engine comprising: providing a ferrous metal strip, depositing a loose but uniformly mixed powder composition comprising copper and a material taken from the group consisting of iron and nickel in a thin layer on a surface of said strip, heating said powder mixture to fuse the copper portion thereof and bond the other metal particles to each other and to said strip in an adherent porous sponge layer, cutting said strip, if necessary, to a desired predetermined length and shaping it to define the closed inner surface portion of a said housing member, the ends of said strip then being in abutting relationship and said sintered layer being on the outside surface of said strip, joininig the abutting ends of said strip, and die casting aluminum metal around the shaped ferrous metal strip member to form the body portion of a said housing member on said ferrous strip member, molten aluminum permeating said porous sponge layer to form upon solidification a strong bond with said ferrous metal strip liner.
Claim 7
Independent Claim
198 words
A method of forming a composite rotor housing member for a rotary engine comprising: providing a carbon steel strip, depositing a loose but uniformly mixed powder composition comprising, by weight, 55 to 85 parts copper and 45 to 15 parts of a material taken from the group consisting of iron and nickel in a thin layer on a surface of said strip, heating said powder mixture to fuse the copper portion thereof and bond the other metal particles to each other and to said strip in an adherent porous sponge layer, cutting said strip, if necessary, to a desired predetermined length and shaping it to define the closed inner surface portion of a said housing member, the ends of said strip then being in abutting relationship and said sintered layer being on the outside surface of said strip, joining the abutting ends of said strip, and die casting aluminum metal around the shaped carbon steel strip member to form the body portion of a said housing member on said steel strip member, molten aluminum permeating said porous sponge layer to form upon solidification a strong interlocking mechanical bond with said porous layer and thus with said steel liner.
Claim 8
Independent Claim
198 words
A method of forming a composite rotor housing member for a rotary engine comprising: providing a carbon steel strip, depositing a loose but uniformly mixed powder composition comprising, by weight, 55 to 85 parts copper and 45 to 15 parts of a material taken from the group consisting of iron and nickel in a thin layer on a surface of said strip, heating said powder mixture to fuse the copper portion thereof and bond the other metal particles to each other and to said strip in an adherent porous sponge layer, cutting said strip, if necessary, to a desired predetermined length and shaping it to define the closed inner surface portion of a said housing member, the ends of said strip then being in abutting relationship and said sintered layer being on the outside surface of said strip, joining the abutting ends of said strip, and die casting aluminum metal around the shaped carbon steel strip member to form the body portion of a said housing member on said steel strip member, molten aluminum permeating said porous sponge layer to form upon solidification a strong interlocking mechanical bond with said porous layer and thus with said steel liner.
Claim 9
Independent Claim
253 words
A method of forming a composite rotor housing member for a rotary engine, the said engine being of the type in which a rotor housing cooperates with side housing members to define a cavity in which an eccentrically mounted working rotor rotates and orbits, the rotor housing having a relatively high temperature side during operation of said engine at which combustion takes place and a relatively low temperature side opposite said high temperature side, said method comprising: depositing a loose but uniformly mixed powder composition comprising copper and a material taken from the group consisting of iron and nickel in a thin layer on a ferrous metal strip, heating said powder mixture to fuse the copper portion thereof and bond the other metal particles to each other aNd to said strip in an adherent porous sponge layer, cutting said strip, if necessary, to a desired predetermined length and shaping it to define the closed inner surface portion of a said housing member, the ends of said strip then being in abutting relationship and said sintered layer being on the outside surface of said strip, joining the abutting ends of said strip, and die casting aluminum metal around the shaped ferrous metal strip member to form the body portion of a said housing member on said ferrous strip member, molten aluminum permeating said porous sponge layer to form upon solidification a strong bond with said ferrous metal strip liner, the joint in said strip being located at said low temperature side of said housing.
Claim 10
Independent Claim
253 words
A method of forming a composite rotor housing member for a rotary engine, the said engine being of the type in which a rotor housing cooperates with side housing members to define a cavity in which an eccentrically mounted working rotor rotates and orbits, the rotor housing having a relatively high temperature side during operation of said engine at which combustion takes place and a relatively low temperature side opposite said high temperature side, said method comprising: depositing a loose but uniformly mixed powder composition comprising copper and a material taken from the group consisting of iron and nickel in a thin layer on a ferrous metal strip, heating said powder mixture to fuse the copper portion thereof and bond the other metal particles to each other aNd to said strip in an adherent porous sponge layer, cutting said strip, if necessary, to a desired predetermined length and shaping it to define the closed inner surface portion of a said housing member, the ends of said strip then being in abutting relationship and said sintered layer being on the outside surface of said strip, joining the abutting ends of said strip, and die casting aluminum metal around the shaped ferrous metal strip member to form the body portion of a said housing member on said ferrous strip member, molten aluminum permeating said porous sponge layer to form upon solidification a strong bond with said ferrous metal strip liner, the joint in said strip being located at said low temperature side of said housing.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |