US3575377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure seal for gate valve and method
Assignee: Willamette Iron and Steel Co
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Filing: 1969-02-20
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Granted: 1971-04-20
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Expires: 1989-02-20
Abstract
Abstract This invention is concerned with the structure of the gate in a fabricated gate valve where the gate is moved vertically to the open or closed position as the case may be, and is directed primarily to the method and means for effecting the closure seal of the gate. The closing portion of the gate is counterbored in stepped relation on both faces with an annular deeper portion forming a socket adjacent the periphery of the bore. A loosely fitting sealing disc is inserted into the counterbore, without bottoming, and in sealing relation with the cut of the counterbore at its perimeter. The sealing in the closed position is accomplished by an annular O-ring in the face of the sealing disc engaging in the area of the inner end of the through flow pipe segment of the valve body and the line pressure acting on the inner face of the disc having an area larger than the area of the cross section of the flow.
Inventors
- 👤 Sydney E Carlton
- 👤 Max L Moody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:59
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/16; F16K3/18; F16K3/188; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
120 words
A gate for a fabricated gate valve having a lower portion with an opening therethrough of the same diameter as the through flow pipe and an upper solid portion for blocking the flow through a valve, said solid portion having substantially equal counterboring over the entire area on both sides of greater diameter than the flow when positioned in the closed position with a valve, discs loosely fitting within said counterbore without bottoming therein and having a central opening therethrough, peripheral sealing means on said discs for sealing engagement with the peripheral walls of said counterbores, and sealing means on the outer face of each disc of larger diameter than the flow but less than the diameter of the discs.
Claim 2
Dependent Claim
120 words
A gate for a fabricated gate valve having a lower portion with an opening therethrough of the same diameter as the through flow pipe and an upper solid portion for blocking the flow through a valve, said solid portion having substantially equal counterboring over the entire area on both sides of greater diameter than the flow when positioned in the closed position with a valve, discs loosely fitting within said counterbore without bottoming therein and having a central opening therethrough, peripheral sealing means on said discs for sealing engagement with the peripheral walls of said counterbores, and sealing means on the outer face of each disc of larger diameter than the flow but less than the diameter of the discs.
Claim 3
Dependent Claim
14 words
The gate of claim 1 wherein the counterboring is annularly deeper at the perimeter.
Claim 4
Dependent Claim
41 words
The gate of claim 1 wherein the counterboring is annularly deeper at the perimeter and wherein the discs have an annular land on their inner faces at the perimeter thereof but not as wide as the annular cut of the counterbore.
Claim 5
Dependent Claim
61 words
The gate of claim 3 wherein there are a flexible spacer rings inwardly of disc lands and extending adjacent to the inner perimeter of deeper annular portions of the counterbores. with the peripheral walls of said counterbores, and sealing means on the outer face of each disc of larger diameter than the flow but less than the diameter of the discs.
Claim 6
Dependent Claim
197 words
A fabricated gate valve having a narrow interNal body cavity for the vertical movement of the gate and a flow through passage, a gate for said valve, said gate having a solid portion for blocking the through flow when in the closed position and an opening therethrough corresponding to the diameter of the through flow when in the open position, said closing portion of the gate having substantially equal counterboring in each opposite face over the entire area greater than the diameter of the flow in the closed position, disc means loosely filling in each of the counterbores without bottoming therein, said discs having an O-ring groove and seal in the perimeter for sealing between the edge of the disc and the peripheral wall of the counterbore and an O-ring groove and seal on the outer face thereof of a diameter larger than the through flow passage but not as large as that of the counterbore for sealing in the valve cavity in the closed position, said discs also having an axial opening therethrough, and means for raising and lowering the gate within the valve body cavity from the open to the closed positions and vice versa.
Claim 7
Dependent Claim
197 words
A fabricated gate valve having a narrow interNal body cavity for the vertical movement of the gate and a flow through passage, a gate for said valve, said gate having a solid portion for blocking the through flow when in the closed position and an opening therethrough corresponding to the diameter of the through flow when in the open position, said closing portion of the gate having substantially equal counterboring in each opposite face over the entire area greater than the diameter of the flow in the closed position, disc means loosely filling in each of the counterbores without bottoming therein, said discs having an O-ring groove and seal in the perimeter for sealing between the edge of the disc and the peripheral wall of the counterbore and an O-ring groove and seal on the outer face thereof of a diameter larger than the through flow passage but not as large as that of the counterbore for sealing in the valve cavity in the closed position, said discs also having an axial opening therethrough, and means for raising and lowering the gate within the valve body cavity from the open to the closed positions and vice versa.
Claim 8
Dependent Claim
21 words
The gate valve of claim 5 wherein the counterbore in each face of the gate is annularly deeper adjacent the perimeter.
Claim 9
Dependent Claim
44 words
The gate valve of claim 5 wherein the counterbore in each face of the gate is annularly deeper adjacent the perimeter thereof and where the discs have annular lands on their inner faces but not as wide as the annular bore which receives them.
Claim 10
Dependent Claim
32 words
The gate valve of claim 7 wherein there is a resilient spacer ring between the inner diameter of the lands and the inner diameter of the annular deeper portion of the counterbore.
Claim 11
Dependent Claim
27 words
The gate valve of claim 8 wherein the spacer rings are biased to urge the discs into sealing relation with the valve cavity in the closed position.
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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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |