Claims
- 1. A ceramic cast-in bonded piston, comprising:
- a ceramic crown comprising a top surface, a bottom surface, and an annular notch formed in an outermost side peripheral surface thereof;
- an aluminum alloy piston main body cast-in bonded in contact with said bottom surface of said ceramic crown; and
- at least one metal annular member friction welded in said annular notch of said ceramic crown to seal an interface between said ceramic crown and said piston main body wherein said interface is protected from exposure to an outside environment and said outermost side peripheral surface of said ceramic crown is arranged flush with outermost side surfaces of said piston main body and said annular member, thereby preventing entry of gases between said ceramic crown and said piston main body through said interface.
- 2. A ceramic cast-in bonded piston, comprising:
- a ceramic crown comprising a top surface and a bottom surface;
- an aluminum alloy piston main body cast-in bonded in contact with said bottom surface of said ceramic crown, and said piston main body having an annular notch formed in an upper surface thereof at an outermost side peripheral portion thereof; and
- at least one metal annular member friction welded to said bottom surface of said ceramic crown and occupying said annular notch of said piston main body to seal an interface between said ceramic crown and said piston main body wherein said interface is protected from exposure to an outside environment and said outermost side peripheral portion of said piston main body is arranged flush with an outermost side surface of said annular member, thereby preventing entry of gases between said ceramic crown and said piston main body through said interface.
Priority Claims (2)
Number |
Date |
Country |
Kind |
63-268818 |
Oct 1988 |
JPX |
|
63-268819 |
Oct 1988 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 07/423,880 filed Oct. 19, 1989, now abandoned.
US Referenced Citations (5)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0111989 |
Jun 1984 |
EPX |
3506069 |
Sep 1985 |
DEX |
3626009 |
Feb 1987 |
DEX |
62-200147 |
Dec 1987 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan, vol. 3, No. 46 (C-43) Apr. 18, 1979. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
423880 |
Oct 1989 |
|