US4269391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve sealing device and a valve
Assignee: Nippon Carbon Co Ltd
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Filing: 1978-04-24
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Granted: 1981-05-26
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Expires: 1998-04-24
Abstract
Abstract A valve sealing device is proposed consisting of two parts, one of which contacts the body of the valve and is made of an expanded graphite compact or an expanded graphite-inorganic binder composite compact, and the other of which contacts the valve member and is made of a carbonaceous material-metallic material composite, a carbonaceous material impregnated with an inorganic binder, or a metallic material; a valve using such a sealing device is also proposed.
Inventors
- 👤 Tutomu Saito
- 👤 Hiroshi Yamazoe
- 👤 Hidenori Yamaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:23
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2263; F16K1/2266; F16J; F16J15/00; F16J15/16; F16J15/26; F16J15/30; F16K3/00; F16K3/02; F16K3/16; F16K3/18; F16K3/184; F16K5/00; F16K5/06; F16K5/0663; F16K5/0673
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
143 words
A sealing device for a valve comprising a valve body and a valve member, which is adapted to be situated between the valve body and the valve member, comprising: a valve body contact member; and a valve member contact member situated between said valve member and said valve body contact member, said valve body contact member including a surface facing and engaging said valve body, said surface in assembly being uniformly compressed against said valve body; wherein the material from which the valve body contact member is fabricated consists of an expanded graphite compact having a bulk density no less than 1.1 gm/cm 3 ; and wherein the material from which the valve member contact member is fabricated consists of a carbonaceous material/metallic material composite in which said metallic material is represented in amounts equal to 10-40% by volume of the entire amount.
Claim 2
Dependent Claim
143 words
A sealing device for a valve comprising a valve body and a valve member, which is adapted to be situated between the valve body and the valve member, comprising: a valve body contact member; and a valve member contact member situated between said valve member and said valve body contact member, said valve body contact member including a surface facing and engaging said valve body, said surface in assembly being uniformly compressed against said valve body; wherein the material from which the valve body contact member is fabricated consists of an expanded graphite compact having a bulk density no less than 1.1 gm/cm 3 ; and wherein the material from which the valve member contact member is fabricated consists of a carbonaceous material/metallic material composite in which said metallic material is represented in amounts equal to 10-40% by volume of the entire amount.
Claim 3
Dependent Claim
39 words
A sealing device according to claim 1, wherein the carbonaceous material of the carbonaceous material--metallic material composite, which is used, is selected from the group consisting of a non-graphitic carbonaceous material and a graphitic carbonaceous material excluding expanded graphite.
Claim 4
Dependent Claim
31 words
A sealing device according to claim 1, wherein the metallic material of the carbonaceous material metallic material composite, which is used, has a melting point of from 200° to 1300° C.
Claim 5
Dependent Claim
36 words
A sealing device according to claim 1, wherein a wetting agent for the carbonaceous material, selected from the group consisting of titanium and zirconium, is added to the carbonaceous material metallic material composite, which is used.
Claim 6
Dependent Claim
25 words
A sealing device according to claim 4, wherein the wetting agent is used in amounts of 0.5% to 25% by weight of the metallic material.
Claim 7
Dependent Claim
24 words
A sealing device according to claim 1, wherein the valve body contact member is fitted into and extends from the valve member contact member.
Claim 8
Dependent Claim
24 words
A sealing device according to claim 1, wherein the valve body contact member is attached to and extends from the valve member contact member.
Claim 9
Dependent Claim
26 words
A sealing device according to claim 1, wherein the valve body contact member includes at least one groove on its contact surface to the valve body.
Claim 10
Dependent Claim
30 words
A sealing device according to claim 1, wherein the valve body contact member is divided into several sealing pieces arranged substantially concentrically to one another around an axis of symmetry.
Claim 11
Dependent Claim
29 words
A sealing device according to claim 1, wherein the valve member contact member is formed with at least one annular groove in its contact surface with the valve member.
Claim 12
Dependent Claim
36 words
A sealing device according to claim 10, wherein only one annular groove is provided and wherein one side of the groove opens outwards so that the groove is provided as a depression with one side wall.
Claim 13
Dependent Claim
16 words
A sealing device according to claim 10, wherein the annular groove has a V-shaped cross section.
Claim 14
Dependent Claim
15 words
A sealing device according to claim 10, wherein the annular groove has a rectangular cross-section.
Claim 15
Dependent Claim
24 words
A sealing device according to claim 13, wherein at least one of the possibly plural annular grooves has a supplementary ring inserted into it.
Claim 16
Dependent Claim
35 words
A sealing device according to claim 14, wherein the supplementary ring is made of a material selected from the group consisting of (a) an expanded graphite compact; and (b) an expanded graphite--inorganic binder composite compact.
Claim 17
Dependent Claim
28 words
A sealing device according to claim 1, wherein an annular reinforcing ring is provided around the combination of said valve body contact member and valve member contact member.
Claim 18
Dependent Claim
14 words
A sealing device according to claim 1, which is used in a ball valve.
Claim 19
Dependent Claim
11 words
A ball valve comprising a sealing device according to claim 1.
References Cited (Backward Citations)
FR1517596A
Cited
US3563265A
Cited
US3592440A
Cited
US3907514A
Cited
US4006881A
Cited
US4004776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |