Patent US4810591A successfully refreshed from Google Patents.
US4810591A
Expired / Lapsed
US
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Metal gasket
Assignee: Hamamatsu Gasket Seisakusho Ltd
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Filing: 1986-10-07
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Granted: 1989-03-07
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Expires: 2006-10-07
Abstract
Abstract In construction of a composite type metal gasket having a hard metal substrate, use of Cu, Cu-base alloy, Al or Al-base alloys for covering layers well enhances sealing effect and consolidates substrate-covering bonding.
Inventors
- 👤 Yakichi Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:14
CPC Classifications
F; F16; F16B; F16B15/00; F16B15/08; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0818; C; C09; C09K; C09K3/00; C09K3/10; F16J15/0806; C09K2200/00; C09K2200/02; C09K2200/0204; C09K2200/0213; F16J2015/085; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/1275; Y10T428/12757; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/1291; Y10T428/12917; Y10T428/12924; Y10T428/12937
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
77 words
A metal gasket comprising: a substrate made of heat resistant spring metal having a hardness of Hv 350 to 500; and covering layers clad to said substrate and covering both surfaces of said substrate and made of a material chosen from a group consisting of Cu, Cu-base alloys, Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket at a temperature in a range from 350° to 500° C.
Claim 2
Dependent Claim
77 words
A metal gasket comprising: a substrate made of heat resistant spring metal having a hardness of Hv 350 to 500; and covering layers clad to said substrate and covering both surfaces of said substrate and made of a material chosen from a group consisting of Cu, Cu-base alloys, Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket at a temperature in a range from 350° to 500° C.
Claim 3
Dependent Claim
39 words
A metal gasket as claimed in claim 1 in which said covering layers are made of one of Cu and Cu-base alloy, and heat treatment is carried out at a temperature in a range from 450° to 500° C.
Claim 4
Dependent Claim
40 words
A metal gasket as claimed in claim 1 in which said heat resistant spring metal is cold rolled spring steel which includes 0.4 to 1.0% by weight of C, 0.1 to 0.5% by weight of Si and Fe in balance.
Claim 5
Dependent Claim
43 words
A metal gasket as claimed in claim 3 in which said cold rolled spring steel further includes one or more of 1.0% by weight or less of Mn, 1.5% by weight or less of Cr and 0.5% by weight or less of V.
Claim 6
Dependent Claim
32 words
A metal gasket as claimed in claim 1 in which said heat resistant spring metal is spring stainless steel which includes 10 to 20% by weight of Cr and Fe in balance.
Claim 7
Dependent Claim
56 words
A metal gasket as claimed in claim 5 in which said spring stainless steel further includes one or more of 0.5% by weight or less of C, 1.0% by weight or less of Si, 2.0% by weight or less of Mn, 12% by weight or less of Ni and 2.0% by weight or less of Al.
Claim 8
Dependent Claim
40 words
A metal gasket as claimed in claim 1 in which said heat resistant spring metal is heat resistant spring steel which includes 30 to 46% by weight of Ni, 15 to 25% by weight of Cr and Fe in balance.
Claim 9
Dependent Claim
71 words
A metal gasket as claimed in claim 7 in which said heat resistant spring steel further includes one or more of 0.1% by weight or less of C, 1.0% by weight or less of Si, 1.5% by weight or less of Mn, 5.0% by weight or less of Mo, 3.0% by weight or less of Cu, 1.0% by weight or less of Al and 1.5% by weight or less of Ti.
Claim 10
Dependent Claim
34 words
A metal gasket as claimed in claim 1 in which said heat resistant spring metal is heat resistant Ni-base spring alloy which includes 10 to 25% by weight of Cr and Ni in balance.
Claim 11
Dependent Claim
75 words
A metal gasket as claimed in claim 9 in which said heat resistant Ni-base spring alloy further includes one or more of 30% by weight of Fe, 0.2% by weight of C, 1.0% by weight or less of Si, 1.0% by weight or less of Mn, 1.0% by weight or less of Cu, 2.0% by weight or less of Al, 3.0% by weight or less of Ti and 1.5% by weight or less of (Nb+Ta).
Claim 12
Dependent Claim
78 words
A metal gasket as claimed in claim 1 in which said covering layers are made of Cu-base alloy which includes one or more of 3.5% by weight or less of Fe, 3.0% by weight or less of Sn, 45% by weight or less of Zn, 12% by weight or less of Al, 2.0% by weight or less of Mn, 35% by weight or less of Ni and 0.5% by weight or less of P, and Cu in balance.
Claim 13
Dependent Claim
98 words
A metal gasket is claimed in claim 1 in which said covering layers are made of Al-base alloy which includes one or more of 1.2% by weight or less of Si, 1.0% by weight or less Fe, 5.0% by weight or less of Cu, 1.5% by weight or less of Mn, 5.0% by weight or less of Mg, 0.5% by weight or less of Cr, 5.0% by weight or less of Zn, 0.5% by weight or less of Ti, 0.5% by weight or less of V and 0.5% by weight or less of Zr, and Al in balance.
Claim 14
Dependent Claim
20 words
A metal gasket as claimed in claim 1 further comprising intermediate layers formed between said substrate and said covering layers.
Claim 15
Dependent Claim
30 words
A metal gasket as claimed in claim 13 in which said covering layers are made of one of Cu and Cu-base alloys, and said intermediate layers are made of Ni.
Claim 16
Dependent Claim
30 words
A metal gasket as claimed in claim 13 in which said covering layers are made of one of Al and Al alloys, and said intermediate layers are made of Cu.
Claim 17
Dependent Claim
24 words
A metal gasket as claimed in claim 1 in which the thickness of said substrate is in a range from 0.10 to 0.35 mm.
Claim 18
Dependent Claim
26 words
A metal gasket as claimed in claim 1 in which the thickness of each said covering layer is in a range from 0.03 to 0.15 mm.
Claim 19
Dependent Claim
88 words
A metal gasket comprising: a substrate made of cold rolled spring steel which includes 0.4 to 1.0% by weight of C, 0.1 to 0.5% by weight of Si and Fe in balance; and covering layers clad to said substrate and covering both surfaces of said substrate and made of alloys chosen from a group consisting of Cu, Cu-base alloys, Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket at a temperature in a range of 350° to 500° C.
Claim 20
Dependent Claim
88 words
A metal gasket comprising: a substrate made of cold rolled spring steel which includes 0.4 to 1.0% by weight of C, 0.1 to 0.5% by weight of Si and Fe in balance; and covering layers clad to said substrate and covering both surfaces of said substrate and made of alloys chosen from a group consisting of Cu, Cu-base alloys, Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket at a temperature in a range of 350° to 500° C.
Claim 21
Dependent Claim
43 words
A metal gasket as claimed in claim 18 in which said cold rolled spring steel further includes one or more of 1.0% by weight or less of Mn, 1.5% by weight or less of Cr and 0.5% by weight or less of V.
Claim 22
Dependent Claim
80 words
A metal gasket comprising: a substrate made of spring stainless steel which includes 10 to 20% by weight of Cr and Fe in balance; and covering layers clad to said substrate and covering both surfaces of said substrate and made of alloys chosen from a group consisting of Cu, Cu-base alloys, Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket at a temperature in a range of 350° to 500° C.
Claim 23
Dependent Claim
80 words
A metal gasket comprising: a substrate made of spring stainless steel which includes 10 to 20% by weight of Cr and Fe in balance; and covering layers clad to said substrate and covering both surfaces of said substrate and made of alloys chosen from a group consisting of Cu, Cu-base alloys, Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket at a temperature in a range of 350° to 500° C.
Claim 24
Dependent Claim
58 words
A metal gasket as claimed in claimed in claim 20 in which said spring stainless steel further includes one or more of 0.5% by weight or less of C, 1.0% by weight or less of Si, 2.0% by weight or less of Mn, 12% by weight or less of Ni and 2.0% by weight or loss of Al.
Claim 25
Dependent Claim
88 words
A metal gasket comprising: a substrate made of heat resistant spring steel which includes 30 to 46 by weight of Ni, 15 to 25% by weight of Cr and Fe in balance; and covering layers clad to said substrate and covering both surfaces of said substrate and made of alloys chosen from a group consisting of Cu, Cu-base alloys, Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket at a temperature in a range of 350° to 500° C.
Claim 26
Dependent Claim
88 words
A metal gasket comprising: a substrate made of heat resistant spring steel which includes 30 to 46 by weight of Ni, 15 to 25% by weight of Cr and Fe in balance; and covering layers clad to said substrate and covering both surfaces of said substrate and made of alloys chosen from a group consisting of Cu, Cu-base alloys, Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket at a temperature in a range of 350° to 500° C.
Claim 27
Dependent Claim
71 words
A metal gasket as claimed in claim 22, in which said heat resistance spring steel further includes one or more of 0.1% by weight or less of C, 1.0% by weight or less of Si, 1.5% by weight or less of Mn, 5.0% by weight or less of Mo, 3.0% by weight or less of Cu, 1.0% by weight or less of Al and 1.5% by weight or less of Ti.
Claim 28
Dependent Claim
82 words
A metal gasket comprising: a substrate made of heat resistant Ni-base spring alloy which includes 20 to 25% by weight of Cr and Ni in balance; and covering layers clad to said substrate and covering both surfaces of said substrate and made of alloys chosen from a group consisting of Cu, Cu-base alloys, Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket at a temperature in a range of 350° to 500° C.
Claim 29
Dependent Claim
82 words
A metal gasket comprising: a substrate made of heat resistant Ni-base spring alloy which includes 20 to 25% by weight of Cr and Ni in balance; and covering layers clad to said substrate and covering both surfaces of said substrate and made of alloys chosen from a group consisting of Cu, Cu-base alloys, Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket at a temperature in a range of 350° to 500° C.
Claim 30
Dependent Claim
76 words
A metal gasket as claimed in claim 24, in which said heat a resistant Ni-base spring alloy further includes one or more of 30% by weight of Fe, 0.2% by weight of C, 1.0% by weight or less of Si, 1.0% by weight or less of Mn, 1.0% by weight or less of Cu, 2.0% by weight or less of Al, 3.0% by weight or less of Ti and 1.5% by weight or less of (Nb+Ta).
Claim 31
Dependent Claim
81 words
A metal gasket comprising: a substrate made of metal; covering layers clad to said substrate and covering both surfaces of said substrate and made of a material chosen from a group consisting of Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket, at a temperature in a range of from 350° to 500° C.; and intermediate layers formed between said substrate and said covering layers, said intermediate layers being made of Cu.
Claim 32
Dependent Claim
81 words
A metal gasket comprising: a substrate made of metal; covering layers clad to said substrate and covering both surfaces of said substrate and made of a material chosen from a group consisting of Al and Al-base alloys, said covering layers and said substrate being heat treated during production of said gasket, at a temperature in a range of from 350° to 500° C.; and intermediate layers formed between said substrate and said covering layers, said intermediate layers being made of Cu.
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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) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |