US5035959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel body having ceramic tip soldered thereto
Assignee: Niterra Co Ltd
•
Filing: 1989-12-18
•
Granted: 1991-07-30
•
Expires: 2009-12-18
Abstract
Abstract A body, like a rocker arm, is disclosed which comprises a base body fabricated of a Ni-Cr-Mo type steel which contains less than 8 wt % Cr; and a ceramic tip soldered to a given portion of the base body. The soldering is so made as to increase the hardness of the base body.
Inventors
- 👤 Masaya Ito
- 👤 Masato Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:13
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K35/004; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; F; F01; F01L; F01L1/00; F01L1/12; F01L1/18; F01L1/181; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/124; C04B2237/125; C04B2237/126; C04B2237/127; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/368; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/70; C04B2237/708; C04B2237/72; C04B2237/76; F01L2301/00; F01L2301/02; F02; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12771; Y10T428/12861; Y10T428/12896; Y10T428/12944; Y10T428/12951; Y10T428/12972
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
162 words
A rocker arm for use in an internal combustion engine, comprising: a base body fabricated of a Ni-Cr-Mo steel comprising about 0.3 to 1.5 wt % Mn, about 1 to 5 wt % Ni, less than about 8 wt % Cr, less than about 1.5 wt % Mo, about 1 wt % Si, less than about 1 wt % W, less than about 1 wt % V, not less than about 0.04 wt % C and a trace of S and P an unavoidable impurities; a silicon nitride base ceramic tip; a buffer plate selected from a group consisting of a copper plate and a nickel plate, said buffer plate being interposed between said ceramic tip and a portion of said base body; and a solder bonding said ceramic tip to said portion of said base body with said buffer plate interposed therebetween, said solder being selected from a group consisting of a Ag-Cu solder, a Ti-Cu solder and a Ti-Ag-Cu solder.
Claim 2
Dependent Claim
162 words
A rocker arm for use in an internal combustion engine, comprising: a base body fabricated of a Ni-Cr-Mo steel comprising about 0.3 to 1.5 wt % Mn, about 1 to 5 wt % Ni, less than about 8 wt % Cr, less than about 1.5 wt % Mo, about 1 wt % Si, less than about 1 wt % W, less than about 1 wt % V, not less than about 0.04 wt % C and a trace of S and P an unavoidable impurities; a silicon nitride base ceramic tip; a buffer plate selected from a group consisting of a copper plate and a nickel plate, said buffer plate being interposed between said ceramic tip and a portion of said base body; and a solder bonding said ceramic tip to said portion of said base body with said buffer plate interposed therebetween, said solder being selected from a group consisting of a Ag-Cu solder, a Ti-Cu solder and a Ti-Ag-Cu solder.
Claim 3
Dependent Claim
28 words
A rocker arm according to claim 1, wherein said buffer plate between said ceramic tip and base is a copper plate and said solder is an Ag-Cu solder.
Claim 4
Dependent Claim
28 words
A rocker arm according to claim 1, wherein said buffer plate between said ceramic tip and base is a copper plate and said solder is a Ti-Cu solder.
Claim 5
Dependent Claim
28 words
A rocker arm according to claim 1, wherein said buffer plate between said ceramic tip and base is a copper plate and said solder is a Ti-Ag-Cu solder.
Claim 6
Dependent Claim
13 words
A rocker arm according to claim 1, comprising at least about 1.4% Cr.
Claim 7
Dependent Claim
28 words
A rocker arm according to claim 5, wherein said buffer plate between said ceramic tip and base is a copper plate and said solder is an Ag-Cu solder.
Claim 8
Dependent Claim
28 words
A rocker arm according to claim 5, wherein said buffer plate between said ceramic tip and base is a copper plate and said solder is a Ti-Cu solder.
Claim 9
Dependent Claim
28 words
A rocker arm according to claim 5, wherein said buffer plate between said ceramic tip and base is a copper plate and said solder is a Ti-Ag-Cu solder.
Claim 10
Dependent Claim
15 words
A rocker arm according to claim 1, having a Rockwell hardness of at least 20.
Claim 11
Dependent Claim
15 words
A rocker arm according to claim 9, having a Rockwell hardness between 20 and 35.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |