US3829061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve seal
Assignee: BAGDAD PLASTICS Inc A CORP OF NEW MEXICO
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Filing: 1971-09-20
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Granted: 1974-08-13
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Expires: 1991-09-20
Abstract
Abstract A gate valve structure including a unitary molded plastic body with a horizontal flow passage and a vertical valve chamber intersecting the flow passage and projecting upwardly therefrom; said chamber having flat, axially spaced, substantially oppositely disposed downwardly convergent seat faces on planes transverse the axis of the flow passage to cooperatively accommodate a vertically shiftable valve gate with flat, substantially oppositely disposed, downwardly convergent sealing faces, said seat faces having annular flexible sealing face engaging sealing beads formed integrally therein, about the flow passage; said beads being of uniform major axial extent throughout their circumferential extent and having flat sealing surfaces, the upper and lower portions of which occur on planes substantially parallel with the axis of the chamber and converge downwardly and join the seat faces.
Inventors
- 👤 E Dayne
- 👤 W Land
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:52
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/04; F16K3/00; F16K3/02; F16K3/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
263 words
A gate valve, of homogeneous plastic material for controlling the flow of fluid, having an inlet and an outlet, a central chamber disposed intermediate the inlet and outlet, and a wedgeshaped member having opposed planar convergent faces and being selectively positionable witin the central chamber, said gate valve comprising: a. a first planar surface disposed within the central chamber parallel to one of said faces of said wedge-shaped member, said first planar surface having an inlet orifice disposed therein and communicating with the inlet; b. a second planar surface disposed within the central chamber parallel to another of said faces of said wedge-shaped member, said second planar surface having an outlet orifice disposed therein and communicating with the outlet; c. a resilient deformable annular inlet protrusion disposed about said inlet orifice, said inlet protrusion being formed as an integral part of said first planar surface, said inlet protrusion tapering in cross-sectional area to a point of substantially zero area; d. a resilient deformable annular outlet protrusion disposed about said outlet orifice, said outlet protrusion being formed as an integral part of said second planar surface, said outlet protrusion tapering in cross-sectional area to a point of substantially zero area; and e. means for positioning said wedge-shaped member into and out of contact with said inlet and said outlet protrusions; whereby, said wedge-shaped member, when in one position, compresses said inlet and said outlet protrusion to seal the inlet and the outlet and inhibits a flow of fluid therebetween, and, when in another position, permits a flow of fluid between the inlet and outlet.
Claim 2
Dependent Claim
263 words
A gate valve, of homogeneous plastic material for controlling the flow of fluid, having an inlet and an outlet, a central chamber disposed intermediate the inlet and outlet, and a wedgeshaped member having opposed planar convergent faces and being selectively positionable witin the central chamber, said gate valve comprising: a. a first planar surface disposed within the central chamber parallel to one of said faces of said wedge-shaped member, said first planar surface having an inlet orifice disposed therein and communicating with the inlet; b. a second planar surface disposed within the central chamber parallel to another of said faces of said wedge-shaped member, said second planar surface having an outlet orifice disposed therein and communicating with the outlet; c. a resilient deformable annular inlet protrusion disposed about said inlet orifice, said inlet protrusion being formed as an integral part of said first planar surface, said inlet protrusion tapering in cross-sectional area to a point of substantially zero area; d. a resilient deformable annular outlet protrusion disposed about said outlet orifice, said outlet protrusion being formed as an integral part of said second planar surface, said outlet protrusion tapering in cross-sectional area to a point of substantially zero area; and e. means for positioning said wedge-shaped member into and out of contact with said inlet and said outlet protrusions; whereby, said wedge-shaped member, when in one position, compresses said inlet and said outlet protrusion to seal the inlet and the outlet and inhibits a flow of fluid therebetween, and, when in another position, permits a flow of fluid between the inlet and outlet.
Claim 3
Dependent Claim
71 words
The gate valve as set forth in claim 1 wherein said positioning means comprises: a. a rotatable threaded stem; b. a threaded cavity disposed within said wedge-shaped member for receiving said threaded stem; c. guide means disposed within said gate valve to inhibit rotation of said wedge-shaped member; and d. means for rotating said stem; whereby, rotation of said stem causes said wedge-shaped member to be axially displaced along said stem.
Claim 4
Dependent Claim
53 words
The gate valve as set forth in claim 2 wherein said gate valve includes: a. a first load bearing surface; b. a second load bearing surface; and c. a thrust flange secured to said stem and positioned intermediate said first and second load bearing surfaces; whereby axial movement of said stem is inhibited.
Claim 5
Dependent Claim
37 words
The gate valve as set forth in claim 3 wherein said second load bearing surface comprises a cap threadedly engaging the body of said gate valve, said cap including an aperture disposed therein for receiving said stem.
Claim 6
Dependent Claim
33 words
The gate valve as set forth in claim 4 including first sealing means disposed intermediate said cap and said thrust flange for preventing a flow of fluid through said cap along said stem.
Claim 7
Dependent Claim
33 words
The gate valve as set forth in claim 5 further including second sealing means disposed intermediate said cap and said body for preventing a flow of fluid intermediate said body and said cap.
Claim 8
Dependent Claim
216 words
A gate valve for controlling the flow of fluid between an inlet port and an outlet port, said gate valve comprising: a. a positionable wedge shaped member having opposed convergent planar faces; b. a first planar surface defining the interior extension of said inlet port, said first surface being parallel to one of said faces of said member; c. a second planar surface defining the interior extension of said outlet port, said second surface being parallel to another of said faces of said member; d. a first resilient deformable annular protrusion disposed about said inlet port, said first annular protrusion being integral with said first planar surface and extending therefrom, said first annular protrusion tapering in cross-sectional area to a point of substantially zero area; e. a second resilient deformable annular protrusion disposed about said outlet port, said second annular protrusion being integral with said second planar surface and extending therefrom, said second annular protrusion tapering in cross-sectional area to a point of substantially zero area; f. positioning means for placing the opposed faces of said member in contact with corresponding annular protrusions disposed about said inlet and outlet ports; whereby, the opposed faces tend to compress said annular protrusions and effect a closure of said inlet and said outlet ports to prevent fluid flow therebetween.
Claim 9
Dependent Claim
216 words
A gate valve for controlling the flow of fluid between an inlet port and an outlet port, said gate valve comprising: a. a positionable wedge shaped member having opposed convergent planar faces; b. a first planar surface defining the interior extension of said inlet port, said first surface being parallel to one of said faces of said member; c. a second planar surface defining the interior extension of said outlet port, said second surface being parallel to another of said faces of said member; d. a first resilient deformable annular protrusion disposed about said inlet port, said first annular protrusion being integral with said first planar surface and extending therefrom, said first annular protrusion tapering in cross-sectional area to a point of substantially zero area; e. a second resilient deformable annular protrusion disposed about said outlet port, said second annular protrusion being integral with said second planar surface and extending therefrom, said second annular protrusion tapering in cross-sectional area to a point of substantially zero area; f. positioning means for placing the opposed faces of said member in contact with corresponding annular protrusions disposed about said inlet and outlet ports; whereby, the opposed faces tend to compress said annular protrusions and effect a closure of said inlet and said outlet ports to prevent fluid flow therebetween.
Claim 10
Dependent Claim
36 words
The gate valve as set forth in claim 7 wherein each of said annular protrusions and the associated one of each said first and the second planar surfaces are co-formed of a generally homogeneous plastic material.
Claim 11
Dependent Claim
25 words
The gate valve as set forth in claim 8 wherein each of said annular protrusions and said member are of similar generally homogeneous plastic material.
Claim 12
Dependent Claim
30 words
The gate valve as set forth in claim 7 wherein the cross section of each of said annular protrusions diminishes in width with increased distance from the corresponding planar surface.
Claim 13
Dependent Claim
22 words
The gate valve as set forth in claim 10 wherein the cross sectional configuration of each of said annular protrusions is uniform.
Claim 14
Dependent Claim
22 words
The gate valve as set forth in claim 10 wherein the cross sectional area of each of said annular protrusions is uniform.
Claim 15
Dependent Claim
22 words
The gate valve as set forth in claim 7 wherein each of said first and second annular protrusions are V-shaped in cross-section.
References Cited (Backward Citations)
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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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |