US3985155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug valves
Assignee: Corning Ltd
•
Filing: 1975-06-06
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Granted: 1976-10-12
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Expires: 1995-06-06
Abstract
Abstract A plug valve having radial ports has a spindle comprising a mandrel having around it a plastics sleeve with integral upstanding ridges biased against the bore to form seals which subdivide the space between the sleeve and the bore and define the flow passages for alignment with selected ports to permit fluid flow therebetween. The valve may be a multiway valve or simply an on/off valve.
Inventors
- 👤 Douglas Daniel John Nightingale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:17
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/078; F16K11/065; F16K11/07; F16K3/00; F16K3/22; F16K3/24; F16K3/243; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86863; Y10T137/86879; Y10T29/00; Y10T29/49; Y10T29/49405; Y10T29/49412
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
179 words
A plug valve comprising a valve body having a bore and a plurality of radial ports communicating with the bore, and a spindle located within the bore, the spindle comprising a mandrel having around it a plastics sleeve with integral upstanding ridges standing proud of the rest of the sleeve surface between the ridges, each ridge overlying a resilient substrate between the mandrel and the sleeve, the free diameter of the spindle being greater than the diameter of the bore so that when the spindle is assembled in the bore the resilient substrate becomes compressed and biases the ridges against the bore to form sliding seals between the spindle and the bore, the diameter of the spindle in thet areas between the ridges being less than the diameter of the bore to provide space for fluid to flow therebetween when passing from one port to another, the configuration of the ridges being arranged to divide said space between the spindle and the bore and define at least one discrete passage alignable with selected ports to permit fluid flow therebetween.
Claim 2
Dependent Claim
179 words
A plug valve comprising a valve body having a bore and a plurality of radial ports communicating with the bore, and a spindle located within the bore, the spindle comprising a mandrel having around it a plastics sleeve with integral upstanding ridges standing proud of the rest of the sleeve surface between the ridges, each ridge overlying a resilient substrate between the mandrel and the sleeve, the free diameter of the spindle being greater than the diameter of the bore so that when the spindle is assembled in the bore the resilient substrate becomes compressed and biases the ridges against the bore to form sliding seals between the spindle and the bore, the diameter of the spindle in thet areas between the ridges being less than the diameter of the bore to provide space for fluid to flow therebetween when passing from one port to another, the configuration of the ridges being arranged to divide said space between the spindle and the bore and define at least one discrete passage alignable with selected ports to permit fluid flow therebetween.
Claim 3
Dependent Claim
15 words
A valve according to claim 1, in which the sleeve is keyed to the mandrel.
Claim 4
Dependent Claim
30 words
A valve according to claim 1, in which the resilient substrate is in the form of a single inner sleeve positioned to bias all the ridges against the bore simultaneously.
Claim 5
Dependent Claim
47 words
A valve according to claim 1, in which the sleeve has a plurality of discrete ridges and the substrate compises a plurality of separate resilient portions inserted into the mandrel surface, the surface of each insert being flush with or below the level of the mandrel surface.
Claim 6
Dependent Claim
31 words
A valve according to claim 4 in which the resilient inserts are of rectangular section, each being located in a rectangular sectioned slot of similar dimensions to those of the insert.
Claim 7
Dependent Claim
81 words
A valve according to claim 1, wherein the body has at least three ports and the spindle ridges are arranged to define one or more flow passages alignable with selected ports, the spindle being movable between at least two different positions in which the flow passages interconnect different ports to permit fluid flow therebetween, whereby the valve has a mulltiway function in that the different positions of the spindle provides a choice of flow paths through the valve between different ports.
Claim 8
Dependent Claim
70 words
A valve according to claim 1 wherein the body has two ports, and the spindle ridges define a flow passage alignable with the two ports simultaneously when in a first position, the spindle being movable to a second position wherein the flow passage is no longer in alignment with both ports, whereby the valve is operable between said first and second positions to provide on/off control of fluid flowing therethrough.
Claim 9
Dependent Claim
38 words
A valve according to claim 1, which is provided with ridges to form terminal seals outside all the ports, with intermediate ridges to subdivide the space between the spindle and the bore as bounded by the terminal seals.
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) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |