US3552439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug valve with resilient seal
Assignee: Individual
•
Filing: 1967-11-07
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Granted: 1971-01-05
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Expires: 1987-11-07
Abstract
Abstract There are disclosed plug valves having positive sealing means. The valves have a principal plug rotatably seated within an internal chamber of a housing, which has inlet and outlet openings, and a secondary plug slideably received in a channel of the principal plug. The principal plug has a flow path, generally perpendicular to the axis of the channel, and the secondary plug has a sealing face alignable with an outlet opening of the housing. The principal plug may be positioned so that the flow path aligns between an inlet and outlet, providing a conduit therebetween, or it may be rotated to align the channel, and hence the secondary plug, between the openings. In this position upstream fluid bears against the secondary plug and slides it against the surface of the housing about the outlet opening to produce sealing engagement therewith.
Inventors
- 👤 Chester A Siver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:51
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/08; F16K11/087; F16K11/0873; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86863; Y10T137/86871
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
326 words
In a plug valve for controlling the flow of fluids, the combination comprising: a housing having an internal chamber and inlet and outlet openings therefor; a principal plug having a channel therethrough, said plug being rotatably seated within said chamber and rotatable so as to align the ends of said channel with said inlet and outLet openings of said housing, said principal plug having at least two ports therein communicating with said channel and extending from opposite sides of said channel to the exterior of said principal plug, said ports being alignable with said inlet and outlet openings by rotation of said principal plug; and and a secondary plug slideably received in said channel of said principal plug so as to be rotatable therewith, said secondary plug having a flow passage therethrough and a pair of orifices communicating with said flow passage and aligned with said ports of said principal plug, said secondary plug being cooperatively dimensioned with respect to said principal plug for limited sliding movement of said secondary plug in said channel, said secondary plug being comprised of a body element and an insert of a material different therefrom retained on said body element against substantial relative movement in a recess at one end thereof, said insert providing part of a composite sealing face on said one end of said secondary plug dimensioned to close an outlet opening in said housing when said principal plug is rotated so as to align its channel and thereby said sealing face with said outlet opening, said sealing face being comprised of continuous concentric elements of both said body element and said insert, the flow of upstream fluid passing through an inlet opening of said housing bearing against said secondary plug to produce sliding movement thereof to bring said concentric elements of both said body element and said insert into sealing engagement with the surface of said housing about said outlet opening to provide highly effective sealing action.
Claim 2
Dependent Claim
326 words
In a plug valve for controlling the flow of fluids, the combination comprising: a housing having an internal chamber and inlet and outlet openings therefor; a principal plug having a channel therethrough, said plug being rotatably seated within said chamber and rotatable so as to align the ends of said channel with said inlet and outLet openings of said housing, said principal plug having at least two ports therein communicating with said channel and extending from opposite sides of said channel to the exterior of said principal plug, said ports being alignable with said inlet and outlet openings by rotation of said principal plug; and and a secondary plug slideably received in said channel of said principal plug so as to be rotatable therewith, said secondary plug having a flow passage therethrough and a pair of orifices communicating with said flow passage and aligned with said ports of said principal plug, said secondary plug being cooperatively dimensioned with respect to said principal plug for limited sliding movement of said secondary plug in said channel, said secondary plug being comprised of a body element and an insert of a material different therefrom retained on said body element against substantial relative movement in a recess at one end thereof, said insert providing part of a composite sealing face on said one end of said secondary plug dimensioned to close an outlet opening in said housing when said principal plug is rotated so as to align its channel and thereby said sealing face with said outlet opening, said sealing face being comprised of continuous concentric elements of both said body element and said insert, the flow of upstream fluid passing through an inlet opening of said housing bearing against said secondary plug to produce sliding movement thereof to bring said concentric elements of both said body element and said insert into sealing engagement with the surface of said housing about said outlet opening to provide highly effective sealing action.
Claim 3
Dependent Claim
31 words
The plug valve of claim 1 wherein said inlet and outlet openings for said internal chamber are aligned along an axis perpendicular to the axis of rotation of said principal plug.
Claim 4
Dependent Claim
35 words
The plug valve of claim 1 wherein said housing has sealing surfaces adjacent and about at least one of said outlet openings configured to cooperate with said secondary plug sealing face for optimum sealing action.
Claim 5
Dependent Claim
35 words
The plug valve of claim 1 wherein there is one inlet opening and one outlet opening, and wherein said openings are aligned along an axis perpendicular to the axis of rotation of said principal plug.
Claim 6
Dependent Claim
43 words
The plug valve of claim 1 wherein said principal plug is cylindrical and wherein said ports are perpendicular to said channel and cooperate with said channel to provide a passageway having an axis perpendicular to the axis of rotation of said principal plug.
Claim 7
Dependent Claim
32 words
The plug valve of claim 1 wherein said secondary plug is elongated and has a circular cross section, and wherein said secondary plug flow passage is perpendicular to the longitudinal axis thereof.
Claim 8
Dependent Claim
25 words
The plug valve of claim 1 wherein said secondary plug sealing face includes a generally annular ridge coaxial with the axis of said secondary plug.
Claim 9
Dependent Claim
51 words
The plug valve of claim 1 wherein said secondary plug has one of said inserts retained in a recess at each end of said secondary plug with each of said inserts providing part of a pair of composite sealing faces, one of which is on each end of said secondary plug.
Claim 10
Dependent Claim
34 words
The plug valve of claim 1 wherein said insert is of relatively hard and durable material providing part of said sealing face in cooperation with a resiliently deformable portion on said secondary plug thereabout.
Claim 11
Dependent Claim
15 words
The plug valve of claim 1 wherein said insert is of a resiliently deformable material.
Claim 12
Dependent Claim
50 words
The plug valve of claim 1 wherein said secondary plug has a rigid body element, an insert of relatively hard and durable material and an interlayer of resiliently deformable material, said interlayer cooperating with said insert to provide said sealing face and a resiliently deformable portion about said outlet opening.
Claim 13
Dependent Claim
38 words
The plug valve of claim 1 wherein there are three openings for said internal chamber and wherein said secondary plug has a third orifice therein communicating with said flow passage therein to provide a geneRally T-shaped flow passage.
Claim 14
Dependent Claim
96 words
The plug valve of claim 1 wherein there are one inlet opening and one outlet opening aligned on an axis perpendicular to the axis of said principal plug and wherein said principal plug is cylindrical with said ports lying on an axis perpendicular to the axis of said channel and lying in a common plane therewith, said common plane being perpendicular to the axis of rotation of said principal plug, and wherein said secondary plug is elongated with a circular cross section and has a flow passage with an axis perpendicular to the longitudinal axis thereof.
Claim 15
Dependent Claim
36 words
The plug valve of claim 13 wherein said body element is of relatively resiliently deformable material and said insert is of relatively hard and durable material cooperating with said body element to provide said sealing face.
Claim 16
Dependent Claim
41 words
The plug valve of claim 13 wherein said secondary plug includes a body element, an insert of relatively hard and durable material and an interlayer therebetween of relatively resiliently deformable material, said insert and interlayer cooperating to provide said sealing face.
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |