US4235418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ball valve having metal seat rings
Assignee: ITT Inc
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Filing: 1978-07-20
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Granted: 1980-11-25
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Expires: 1998-07-20
Abstract
Abstract This relates to a ball valve of the top entry non-spherical type. A soft metal coating is deposited on that portion of the seat ring which contacts the valve member or ball. The ball and seat assembly is inserted into a valve chamber such that the seat rings are in an unstressed condition. After insertion, the ball is rotated 90° causing the ball to engage the soft metal coating, thereby crushing the soft metal to form a tight seal with the ball. In this manner, the lapping process, generally required when metal seats are employed, is eliminated. Further, the seats may be replaced without replacing the ball.
Inventors
- 👤 Angelo Natalizia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:41
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/20; F16K5/201; F16K27/00; F16K27/06; F16K27/067; F16K5/06; F16K5/0626; F16K5/0663; F16K5/0668
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
A metallic valve seat, for use in a valve housing defining a chamber and inlet and outlet ports, said chamber having a closure member therein, comprising: a first metal portion, stamped from a sheet of resilient metal and having a substantially U-shaped cross-section with a base and first and second concentrically disposed legs, for engaging said housing around one of said inlet and outlet openings; and a soft deformable metal layer deposited on said base for engaging said closure member.
Claim 2
Dependent Claim
80 words
A metallic valve seat, for use in a valve housing defining a chamber and inlet and outlet ports, said chamber having a closure member therein, comprising: a first metal portion, stamped from a sheet of resilient metal and having a substantially U-shaped cross-section with a base and first and second concentrically disposed legs, for engaging said housing around one of said inlet and outlet openings; and a soft deformable metal layer deposited on said base for engaging said closure member.
Claim 3
Dependent Claim
15 words
A metallic valve seat according to claim 1 wherein said first metal is stainless steel.
Claim 4
Dependent Claim
15 words
A metallic valve seat according to claim 1 wherein said first metal is Iconel 718.
Claim 5
Dependent Claim
26 words
A metallic valve seat according to claim 1 wherein said soft deformable metal is selected from the group consisting of silver, gold, cadmium, nickel and copper.
Claim 6
Dependent Claim
33 words
A metallic valve seat according to claim 1, wherein said first leg is longer than said second leg by a predetermined amount and said first leg provides a metal contact for said housing.
Claim 7
Dependent Claim
25 words
A metallic valve seat according to claim 5 wherein said first leg has an end having a soft metal coating thereon for contacting said housing.
Claim 8
Dependent Claim
25 words
A metallic valve seat according to claim 5 wherein said second leg substantially engages said housing when said seat is stressed by said closure member.
Claim 9
Dependent Claim
109 words
A metallic valve seat, for use in a valve housing, defining a chamber and inlet and outlet ports, said chamber having a closure member therein, comprising: a first metal portion stamped from a metal sheet and having a substantially U-shaped cross-section with first and second legs and a base, said first leg being longer than said second leg by a predetermined amount and having a beveled end for engaging said housing around one of said inlet and outlet openings for providing a line contact therewith to provide a high pressure seal; and a soft metal layer deposited on a region of said first portion for engaging said closure member.
Claim 10
Dependent Claim
109 words
A metallic valve seat, for use in a valve housing, defining a chamber and inlet and outlet ports, said chamber having a closure member therein, comprising: a first metal portion stamped from a metal sheet and having a substantially U-shaped cross-section with first and second legs and a base, said first leg being longer than said second leg by a predetermined amount and having a beveled end for engaging said housing around one of said inlet and outlet openings for providing a line contact therewith to provide a high pressure seal; and a soft metal layer deposited on a region of said first portion for engaging said closure member.
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) | 1983-11-25 | 1984-05-26 | 1984-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-25 | 1988-05-26 | 1988-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-25 | 1992-05-26 | 1992-11-25 | $7700.00 | Window Closed / Lapsed |