Patent US3458845A successfully refreshed from Google Patents.
Patent US4062515A successfully refreshed from Google Patents.
US4062515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact gate valve
Assignee: Energy Research and Development Administration ERDA
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Filing: 1976-05-13
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Granted: 1977-12-13
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Expires: 1996-05-13
Abstract
Abstract This invention relates to a double-disc gate valve which is compact, comparatively simple to construct, and capable of maintaining high closing pressures on the valve discs with low frictional forces. The valve casing includes axially aligned ports. Mounted in the casing is a sealed chamber which is pivotable transversely of the axis of the ports. The chamber contains the levers for moving the valve discs axially, and an actuator for the levers. When an external drive means pivots the chamber to a position where the discs are between the ports and axially aligned therewith, the actuator for the levers is energized to move the discs into sealing engagement with the ports.
Inventors
- 👤 Gerald E. Bobo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:55
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/04; F16K3/10
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
117 words
A gate valve comprising: a casing enclosing annular seating surfaces defining first and second ports having a common axis; a gate assembly mounted in said casing for arcuate movement toward and away from said common axis and including: a. a pair of valve discs having frontal sealing surfaces for respectively engaging said seating surfaces to close said ports; b. levers respectively connected to said discs; c. means for operating said levers to move said discs along said axis to open and close said ports; and d. a housing isolating said levers and said means from said casing, said housing including flexible sealing means respectively connected to said discs for accommodating movement of said discs along said axis.
Claim 2
Dependent Claim
117 words
A gate valve comprising: a casing enclosing annular seating surfaces defining first and second ports having a common axis; a gate assembly mounted in said casing for arcuate movement toward and away from said common axis and including: a. a pair of valve discs having frontal sealing surfaces for respectively engaging said seating surfaces to close said ports; b. levers respectively connected to said discs; c. means for operating said levers to move said discs along said axis to open and close said ports; and d. a housing isolating said levers and said means from said casing, said housing including flexible sealing means respectively connected to said discs for accommodating movement of said discs along said axis.
Claim 3
Dependent Claim
23 words
The valve of claim 1 wherein said levers are generally L-shaped arms which are pivotally connected to one another intermediate of their ends.
Claim 4
Dependent Claim
22 words
The valve of claim 2 wherein the shorter legs of said levers are respectively connected to the backs of said valve discs.
Claim 5
Dependent Claim
12 words
The valve of claim 1 wherein said flexible sealing means are bellows.
Claim 6
Dependent Claim
26 words
The valve of claim 1 wherein said housing is provided with a pair of axially aligned support shafts which in turn are supported by said casing.
Claim 7
Dependent Claim
17 words
The valve of claim 1 wherein said housing carries stops for limiting axial movement of said discs.
Claim 8
Dependent Claim
20 words
The valve of claim 1 wherein said gate assembly includes guide means for promoting straight-line axial movement of said discs.
Claim 9
Dependent Claim
169 words
A gate valve comprising: a casing enclosing annular seating surfaces defining opposed valve ports having a common centerline; a gate assembly pivotally mounted in said casing for movement toward and away from said centerline, said assembly including: a. a pair of valve discs having frontal sealing surfaces for respectively engaging said seating surfaces to close said ports; b. at least two generally L-shaped levers coupled at an intermediate point for pivotal movement about a common axis, the shorter legs of said levers being pivotally connected to different valve discs; c. drive means for effecting relative movement of said levers about said axis to move said discs along said centerline to close and open said ports; d. a housing encompassing said levers and drive means for isolating said levers and drive means from said casing, said housing including bellows respectively connected to said discs for accommodating movement of said discs along said centerline; and e. a rotatable shaft in said casing affixed to said housing for pivoting said gate assembly.
Claim 10
Dependent Claim
169 words
A gate valve comprising: a casing enclosing annular seating surfaces defining opposed valve ports having a common centerline; a gate assembly pivotally mounted in said casing for movement toward and away from said centerline, said assembly including: a. a pair of valve discs having frontal sealing surfaces for respectively engaging said seating surfaces to close said ports; b. at least two generally L-shaped levers coupled at an intermediate point for pivotal movement about a common axis, the shorter legs of said levers being pivotally connected to different valve discs; c. drive means for effecting relative movement of said levers about said axis to move said discs along said centerline to close and open said ports; d. a housing encompassing said levers and drive means for isolating said levers and drive means from said casing, said housing including bellows respectively connected to said discs for accommodating movement of said discs along said centerline; and e. a rotatable shaft in said casing affixed to said housing for pivoting said gate assembly.
Claim 11
Dependent Claim
10 words
The valve of claim 8 wherein said shaft is hollow.
Claim 12
Dependent Claim
140 words
A gate valve comprising: a casing enclosing annular seating surfaces defining first and second ports having a common axis; a gate assembly in said casing including: a. a pair of valve discs having frontal sealing surfaces for respectively engaging said seating surfaces to close said ports; b. levers respectively connected to said discs; c. means for operating said levers to move said discs along said axis to open and close said ports; and d. a housing isolating said levers and said means from said casing, said housing including flexible sealing means respectively connected to said discs for accommodating movement of said discs along said axis, said housing being provided with a pair of axially aligned support shafts which in turn are supported by said casing, one of said shafts being hollow and being coupled to shaft-rotation means outside said casing.
Claim 13
Dependent Claim
140 words
A gate valve comprising: a casing enclosing annular seating surfaces defining first and second ports having a common axis; a gate assembly in said casing including: a. a pair of valve discs having frontal sealing surfaces for respectively engaging said seating surfaces to close said ports; b. levers respectively connected to said discs; c. means for operating said levers to move said discs along said axis to open and close said ports; and d. a housing isolating said levers and said means from said casing, said housing including flexible sealing means respectively connected to said discs for accommodating movement of said discs along said axis, said housing being provided with a pair of axially aligned support shafts which in turn are supported by said casing, one of said shafts being hollow and being coupled to shaft-rotation means outside said casing.
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) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |