US4553015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating piston by welding
Assignee: Aisin Corp
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Filing: 1983-12-09
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Granted: 1985-11-12
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Expires: 2003-12-09
Abstract
Abstract A method of fabricating a piston for use in an automobile by welding. The head section and the skirt section of the piston are separately fabricated by casting such that these sections form the top wall portion of the piston when joined together and that the abutting surfaces of these sections form a portion of an oil circulating passage. Then, these sections are connected and welded together using an electron beam.
Inventors
- 👤 Masami Ishii
- 👤 Fuminao Arai
- 👤 Noriaki Hattori
- 👤 Junichi Mita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:05
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/10; B23K; B23K15/00; B23K15/04; F; F02; F02F; F02F3/00; F02F3/0015; F02F3/003
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
111 words
A method of fabricating a piston having an exterior portion by welding, the method comprising the steps of: fabricating the head section and the skirt section of the piston separately such that said sections form the top wall portion of the piston when joined together and the abutting surfaces of these sections form a portion of an oil circulating passage; causing the abutting surfaces of the head section and the skirt section to abut each other to form the oil circulating passage; and welding together the abutting surfaces by using an electron beam such that inner end portions of the weld seams are exposed to said exterior portion of said piston.
Claim 2
Independent Claim
111 words
A method of fabricating a piston having an exterior portion by welding, the method comprising the steps of: fabricating the head section and the skirt section of the piston separately such that said sections form the top wall portion of the piston when joined together and the abutting surfaces of these sections form a portion of an oil circulating passage; causing the abutting surfaces of the head section and the skirt section to abut each other to form the oil circulating passage; and welding together the abutting surfaces by using an electron beam such that inner end portions of the weld seams are exposed to said exterior portion of said piston.
Claim 3
Dependent Claim
34 words
A method of fabricating a piston by welding as set forth in claim 1, wherein the electron beam welding is effected at positions at short distances from a cross section of the circulating passage.
Claim 4
Dependent Claim
26 words
A method of fabricating a piston by welding as set forth in claim 1, wherein said abutting surfaces of said sections lie in the same plane.
Claim 5
Dependent Claim
26 words
A method of fabricating a piston by welding as set forth in claim 2, wherein said abutting surfaces of said sections lie in the same plane.
References Cited (Backward Citations)
DE146321C
Cited
US3319536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |