Patent US3256569A successfully refreshed from Google Patents.
Patent US3636971A successfully refreshed from Google Patents.
US3636971A
Expired / Lapsed
US
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Gate valve
Assignee: Ecolaire Inc
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Filing: 1970-09-25
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Granted: 1972-01-25
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Expires: 1990-09-25
Abstract
Abstract A gate valve with a self-flushing function for use in a pipeline in which solid material or particles are dispersed or entrained in a fluid is disclosed. The valve is composed of a housing having inlet and outlet ports defining an opening and a slidable gate adapted to move vertically in a channel in the interior wall of the housing so as to open or block the opening. A depression is provided in the top edge of each of the opposite walls of the channel, and the bottom edge of the gate contains recesses in correspondence with the depressions. As the slidable gate is lowered, the recesses and depressions will correspond to form an opening on the inlet side and an opening on the outlet side of the gate as the gate otherwise blocks the opening defined by the inlet and outlet ports. The fluid in the pipeline enters the opening formed in the inlet side, flows under the bottom edge of the gate and exits the opening formed in the outlet side and during the traverse under the gate flushes away any solid material clogging the channel below the level of the opening.
Inventors
- 👤 Donald K Hagar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:37
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/0281; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
242 words
In a gate valve having a housing with inlet and outlet ports and a gate having a bottom edge and being vertically slidable between said ports in a continuous channel formed in the interior wall of the housing, said channel being defined by two opposite walls and a bottom, and said channel extending across the bottom of said housing for receiving the gate when said gate is in a closed position, the improvement wherein one wall of the channel has a depression in its top edge somewhere in the region between 3 and 6 o''clock on said edge, the opposite wall has a depression in its top edge somewhere in the region between 6 and 9 o''clock thereon, and the bottom edge of the gate has two recesses, one of said recesses being vertically aligned with one of said depressions and the other of said recesses being vertically aligned with the other of said depressions, said alignment of said recesses with said depressions providing, when the gate is partially closed so that that portion of the gate''s bottom edge which extends between said recesses is below the top edges of the walls of the channel, a passageway between said depressions, said passageway being defined by the walls of the channel and the bottom edge of the gate and constituting a conduit for the passage of fluid from the inlet port, beneath the bottom edge of the gate and into the outlet port.
Claim 2
Dependent Claim
242 words
In a gate valve having a housing with inlet and outlet ports and a gate having a bottom edge and being vertically slidable between said ports in a continuous channel formed in the interior wall of the housing, said channel being defined by two opposite walls and a bottom, and said channel extending across the bottom of said housing for receiving the gate when said gate is in a closed position, the improvement wherein one wall of the channel has a depression in its top edge somewhere in the region between 3 and 6 o''clock on said edge, the opposite wall has a depression in its top edge somewhere in the region between 6 and 9 o''clock thereon, and the bottom edge of the gate has two recesses, one of said recesses being vertically aligned with one of said depressions and the other of said recesses being vertically aligned with the other of said depressions, said alignment of said recesses with said depressions providing, when the gate is partially closed so that that portion of the gate''s bottom edge which extends between said recesses is below the top edges of the walls of the channel, a passageway between said depressions, said passageway being defined by the walls of the channel and the bottom edge of the gate and constituting a conduit for the passage of fluid from the inlet port, beneath the bottom edge of the gate and into the outlet port.
Claim 3
Dependent Claim
20 words
The improvement of claim 1 wherein the bottom edge of the gate is, except for the recesses therein, substantially straight.
Claim 4
Dependent Claim
15 words
The improvement of clAim 2 wherein the interior wall of the housing is substantially round.
Claim 5
Dependent Claim
50 words
The improvement of claim 3 wherein the depression in the top edge of one of the channel walls is somewhere in the region between 4 and 5:30 o''clock and the depression in the top edge of the other channel wall is somewhere in the region between 6:30 and 8 o''clock.
Claim 6
Dependent Claim
14 words
The improvement of claim 4 wherein the depressions and recesses are arcuate in shape.
Claim 7
Dependent Claim
42 words
The improvement of claim 5 wherein the bottom portions of the channel walls are further apart from one another than are the top portions of those walls, thus defining a cavity in the bottom of the channel for retention of deposited solids.
Claim 8
Dependent Claim
15 words
The improvement of claim 1 wherein the interior wall of the housing is substantially round.
Claim 9
Dependent Claim
50 words
The improvement of claim 1 wherein the depression in the top edge of one of the channel walls is somewhere in the region between 4 and 5:30 o''clock and the depression in the top edge of the other channel wall is somewhere in the region between 6:30 and 8 o''clock.
Claim 10
Dependent Claim
14 words
The improvement of claim 1 wherein the depressions and recesses are arcuate in shape.
Claim 11
Dependent Claim
42 words
The improvement of claim 1 wherein the bottom portions of the channel walls are further apart from one another than are the top portions of those walls, thus defining a cavity in the bottom of the channel for retention of deposited solids.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |