US3746304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve construction
Assignee: Bopp and Reuther GmbH
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Filing: 1971-02-26
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Granted: 1973-07-17
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Expires: 1991-02-26
Abstract
Abstract A gate valve comprises a valve housing having an annular valve seat which surrounds a passage for flow of a fluid. A valve disc is received in the housing and is movable to and from a sealing position engaging the valve seat. The valve disc has a circumferentially extending sealing surface and an axially directed sealing surface. A sealing element is carried by the valve disc on the sealing surfaces thereof. It comprises a first portion extending along the circumferentially extending surface and a second portion extending along the axially directed surface. The surface area of the second portion is greater than the surface area of the first portion and both portions engage the valve seat when the valve disc is in sealing position, the first portion under radial pressure and the second portion under axial pressure of the fluid.
Inventors
- 👤 K Matthias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:03
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
338 words
A gate for a gate valve having a passage through which a fluid is adapted to flow, comprising a valve disc movable across said passage between a valve opening position and a valve closure position, said valve disc having an upper projecting portion and a main body portion having an upper end and a lower end, said main body portion being provided with two substantially planar axially directed surfaces adapted to extend tranSversely of said passage and each formed with a downwardly curved first groove, and with a peripheral edge face extending in the region of said lower end from one to the other of said axially directed surfaces and formed with a second groove elongated intermediate said axially directed surfaces; upright elongated guide portions extending at opposite lateral sides of said main body portion intermediate said surfaces from said upper end toward said lower end and each having a lower end portion; and a sealing element carried by said main body portion and including a pair of downwardly curved first resilient strip-shaped sealing element portions each provided in one of said first grooves of said surfaces and being downwardly and inwardly inclined towards one another from said upper end more than half-way of the distance toward said lower end, and a single second resilient strip-shaped sealing element portion at least in part received in said second groove and merging with said first sealing element portions in the region below said lower end portions of said guide portions, said first sealing element portions having a combined sealing surface area equal to about two-thirds of the total sealing surface area of said sealing element and serving to provide axial sealing contact in said passage when said valve disc is in said valve closure position, and said second sealing element portion having a sealing surface area equal to about one-third of the total sealing surface area of said sealing element and serving to provide radial sealing contact in said passage when said valve disc is in said valve closure position.
Claim 2
Dependent Claim
338 words
A gate for a gate valve having a passage through which a fluid is adapted to flow, comprising a valve disc movable across said passage between a valve opening position and a valve closure position, said valve disc having an upper projecting portion and a main body portion having an upper end and a lower end, said main body portion being provided with two substantially planar axially directed surfaces adapted to extend tranSversely of said passage and each formed with a downwardly curved first groove, and with a peripheral edge face extending in the region of said lower end from one to the other of said axially directed surfaces and formed with a second groove elongated intermediate said axially directed surfaces; upright elongated guide portions extending at opposite lateral sides of said main body portion intermediate said surfaces from said upper end toward said lower end and each having a lower end portion; and a sealing element carried by said main body portion and including a pair of downwardly curved first resilient strip-shaped sealing element portions each provided in one of said first grooves of said surfaces and being downwardly and inwardly inclined towards one another from said upper end more than half-way of the distance toward said lower end, and a single second resilient strip-shaped sealing element portion at least in part received in said second groove and merging with said first sealing element portions in the region below said lower end portions of said guide portions, said first sealing element portions having a combined sealing surface area equal to about two-thirds of the total sealing surface area of said sealing element and serving to provide axial sealing contact in said passage when said valve disc is in said valve closure position, and said second sealing element portion having a sealing surface area equal to about one-third of the total sealing surface area of said sealing element and serving to provide radial sealing contact in said passage when said valve disc is in said valve closure position.
Claim 3
Dependent Claim
30 words
A gate as defined in claim 1; further comprising cavity means provided in said sealing element inwardly of the outer side thereof for facilitating elastic deformation of said sealing element.
Claim 4
Dependent Claim
23 words
A gate as defined in claim 2, said cavity means being provided at least in said first strip portions of said sealing element.
Claim 5
Dependent Claim
18 words
A gate as defined in claim 1, said first strip portions each having a partly concave outer side.
Claim 6
Dependent Claim
21 words
A gate as defined in claim 1, said second sealing element strip portion being integral with said first sealing element portions.
Claim 7
Dependent Claim
32 words
A gate as defined in claim 1, said main body portion being hollow; and further comprising aperture means communicating with the interior of said main body portion at said lower end thereof.
Claim 8
Dependent Claim
22 words
A gate as defined in claim 1, said first strip portions each having an outer side which is in part outwardly convex.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |