Patent US3570811A successfully refreshed from Google Patents.
US3570811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherical plug valve
Assignee: Istag AG Suhr AG
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Filing: 1969-01-03
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Granted: 1971-03-16
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Expires: 1989-01-03
Abstract
Abstract A spherical plug valve comprises a three-part casing, the middle part containing the spherical plug and an annular holding disc for sealing rings on either side of the plug. The holding discs are mounted in the planes of separation of the valve casing. Each annular holding disc carries at its inner periphery a sealing ring coacting with the spherical valve plug and at its outer periphery a sealing ring providing the seal between the two adjacent casing parts. The annular holding disc may be formed by two sheet metal discs which are axially flanged at their inner periphery to form two radially spaced axially extending flanges engaging between themselves the sealing ring coacting with the spherical valve plug. A supporting ring mounted in the middle part of the casing between the plug and the holding disc supports the holding disc against pressure when the valve is in closed position and allows a limited deformation of the holding disc.
Inventors
- 👤 Julius Kruschik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:48
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/20; F16K5/205; F16K5/208; F16K5/06; F16K5/0626; F16K5/0631; F16K5/0663; F16K5/0673
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
193 words
In a valve having a spherical plug which is rotatably mounted between two sealing rings surrounding the inlet and outlet openings in a valve casing, the valve casing being split in at least one plane extending at right angles to the direction of flow through the valve in the region of a sealing ring, an improvement comprising a holding disc mounted at the plane of separation in the part of the casing containing the spherical plug, said disc having inner and outer edges, a sealing ring at said inner edge in sealing contact with the spherical member and a sealing ring at said outer edge in sealing contact with adjacent casing portions, said holding disc comprising two sheet metal disc elements of identical outer diameter, said sealing ring at the outer edge of the holding disc embracing said disc elements to hold the same together in common while sealing against the adjacent casing portions, said disc elements including axial flanges at the inner edges thereof which are of different diameter, said ring at the inner edge of the holding disc being engaged between the axial flanges in sealing contact with the spherical member.
Claim 2
Dependent Claim
193 words
In a valve having a spherical plug which is rotatably mounted between two sealing rings surrounding the inlet and outlet openings in a valve casing, the valve casing being split in at least one plane extending at right angles to the direction of flow through the valve in the region of a sealing ring, an improvement comprising a holding disc mounted at the plane of separation in the part of the casing containing the spherical plug, said disc having inner and outer edges, a sealing ring at said inner edge in sealing contact with the spherical member and a sealing ring at said outer edge in sealing contact with adjacent casing portions, said holding disc comprising two sheet metal disc elements of identical outer diameter, said sealing ring at the outer edge of the holding disc embracing said disc elements to hold the same together in common while sealing against the adjacent casing portions, said disc elements including axial flanges at the inner edges thereof which are of different diameter, said ring at the inner edge of the holding disc being engaged between the axial flanges in sealing contact with the spherical member.
Claim 3
Dependent Claim
24 words
A valve according to claim 1 wherein said flanges are conically inclined towards their free end with respect to the axis of the casing
Claim 4
Dependent Claim
68 words
A valve according to claim 1 comprising a supporting ring mounted in the casing adjacent the holding disc at the side of the spherical member to define a free annular space with the outer of said axial flanges, said supporting ring defining a radial clearance between the holding disc and supporting ring which decreases linearly from the inner edge outwardly until the disc and ring make mutual contact.
Claim 5
Dependent Claim
56 words
A valve according to claim 1 comprising a supporting ring mounted in the casing adjacent the holding disc at the side of the spherical member and providing a clearance between the holding disc and the supporting ring which decreases progressively from the inner edge of the ring outwardly until the disc and ring make mutual contact.
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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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |