US3698422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lined plug valve
Assignee: Clyde Union Inc
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Filing: 1970-05-06
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Granted: 1972-10-17
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Expires: 1990-05-06
Abstract
Abstract A plug valve whose chamber or bore and whose runs or port passages are fully lined with corrosion-resistant material, most preferably polytetrafluoroethylene, such valve having recesses in its runs, near their intersection with the bore, into which lining material distended by heat and pressure may creep, and with the valve body defining an internally rounded concave wall or dome at the bottom of the bore. The lining material is formed within the runs so as to be under tension longitudinally between the bore and the outer ends of the runs, and the lining material extends integrally upwardly from the bore and outwardly of the valve body to define a thick collar immediately above the neck of the bore. The valve is manufactured by use of an integral hollow rubber or like forming element comprised of tubular legs, and is placed inside the valve body with one such tubular leg extending through each run and through the bore. Different components of a multi-part mandrel are then inserted inside the tubular legs of the forming element and assembled together therewithin. Following this, the space between the rubber forming element and the inner walls of the valve body are filled with lining material, which is then compacted by resilient outer expansion of the forming element. Subsequently, the valve body and the compacted lining material are heated to coalesce or cure the latter in place.
Inventors
- 👤 Jacob B Freed
- 👤 Victor G Reiling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:26
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/02; F16K5/025; F16K27/00; F16K27/06; F16K27/062; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7036
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
140 words
In a lined valve, of the type having a valve body defining a chamber for a valving member which is movable therewithin to open and close a flow path through such chamber and defining at least two laterally-enclosed port passages of predetermined length communicating with and leading to and from said chamber, and of the type having liner means constituting a layer or coating of material covering said passages and at least portions of said chamber adjacent the intersection therewith of said passages, the improvement wherein said passages each have generally continuous side walls over at least certain longitudinal portions thereof, and wherein said side walls of each passage define at least one pocket-like recess comprising a lateral enlargement of such passage, for receiving liner material from within such passage which may be distended from heat, pressure, or like conditions.
Claim 2
Dependent Claim
140 words
In a lined valve, of the type having a valve body defining a chamber for a valving member which is movable therewithin to open and close a flow path through such chamber and defining at least two laterally-enclosed port passages of predetermined length communicating with and leading to and from said chamber, and of the type having liner means constituting a layer or coating of material covering said passages and at least portions of said chamber adjacent the intersection therewith of said passages, the improvement wherein said passages each have generally continuous side walls over at least certain longitudinal portions thereof, and wherein said side walls of each passage define at least one pocket-like recess comprising a lateral enlargement of such passage, for receiving liner material from within such passage which may be distended from heat, pressure, or like conditions.
Claim 3
Dependent Claim
30 words
The improvement in a lined valve according to claim 1, wherein said recess defined by said passage walls is positioned closely adjacent the intersection of such passage with said chamber.
Claim 4
Dependent Claim
28 words
The improvement in a lined valve according to claim 1, wherein said recess defined by said passage side walls has a width which is greater than its depth.
Claim 5
Dependent Claim
37 words
The improvement in a lined valve according to claim 1, wherein said recess has a dimension generally transverse to the longitudinal axis of said passage which is greater than its dimension in the direction of such axis.
Claim 6
Dependent Claim
30 words
The improvement in a lined valve according to claim 1, wherein the said side walls of each of said passages define a pair of said recesses in each such passage.
Claim 7
Dependent Claim
20 words
The improvement in a lined valve according to claim 1, wherein said chamber has a rounded concave internal bottom wall.
Claim 8
Dependent Claim
31 words
The improvement in a lined valve according to claim 6, wherein said chamber further has a side wall which intersects said bottom wall in a manner defining a smoothly curved surface.
Claim 9
Dependent Claim
123 words
In a fully lined plug valve, of the type having a valve body defining a generally cylindrical bore for receiving a plug-like valve member which is rotatable within such bore to open and close a flow path through the latter, and defining at least two laterally enclosed port passages communicating with and leading to and from said bore, the improvement comprising: an integral liner of corrosion-resistant material molded in place within and covering the internal surfaces of said port passages and said bore; and a bottom wall forming an end of said bore; said bottom wall having a rounded concave surface as seen from within the bore; and said liner covering said concave surface and the lower portions of the bore communicating therewith.
Claim 10
Dependent Claim
123 words
In a fully lined plug valve, of the type having a valve body defining a generally cylindrical bore for receiving a plug-like valve member which is rotatable within such bore to open and close a flow path through the latter, and defining at least two laterally enclosed port passages communicating with and leading to and from said bore, the improvement comprising: an integral liner of corrosion-resistant material molded in place within and covering the internal surfaces of said port passages and said bore; and a bottom wall forming an end of said bore; said bottom wall having a rounded concave surface as seen from within the bore; and said liner covering said concave surface and the lower portions of the bore communicating therewith.
Claim 11
Dependent Claim
42 words
The improvement in a fully lined plug valve according to claim 8, wherein said lower bore portions comprise generally cylindrical side walls of the bore and the intersection of said side walls and said rounded concave bottom wall defines a smooth curve.
Claim 12
Dependent Claim
220 words
In a lined valve, of the type having a one-piece valve body defining a chamber for a valving member and having a valving member which is movable therewithin to open and close a flow path through such chamber, and defining at least two laterally enclosed port passages of predetermined length communicating with and leading to and from said chamber, and of the type having liner means constituting a layer or coating of material covering at least a major portion of said chamber, the improvement comprising: an opening defined by said valve body in axial alignment with said chamber; said opening extending laterally through the valve body, and communicating with said chamber; and said liner means being a one-piece member of PTFE formed in place within said chamber and having an integral, generally tubular portion lining said opening and extending therethrough generally Parallel to the axis of said chamber a distance at least slightly greater than the typical or average thickness of the liner means within said chamber; said valving member projecting beyond said opening; said extending portion of said liner means forming an enlargement which is in contact both with said valve body outside said opening and with said valving member beyond said opening to effect a seal around at least part of said projecting portion of said valve member.
Claim 13
Dependent Claim
220 words
In a lined valve, of the type having a one-piece valve body defining a chamber for a valving member and having a valving member which is movable therewithin to open and close a flow path through such chamber, and defining at least two laterally enclosed port passages of predetermined length communicating with and leading to and from said chamber, and of the type having liner means constituting a layer or coating of material covering at least a major portion of said chamber, the improvement comprising: an opening defined by said valve body in axial alignment with said chamber; said opening extending laterally through the valve body, and communicating with said chamber; and said liner means being a one-piece member of PTFE formed in place within said chamber and having an integral, generally tubular portion lining said opening and extending therethrough generally Parallel to the axis of said chamber a distance at least slightly greater than the typical or average thickness of the liner means within said chamber; said valving member projecting beyond said opening; said extending portion of said liner means forming an enlargement which is in contact both with said valve body outside said opening and with said valving member beyond said opening to effect a seal around at least part of said projecting portion of said valve member.
Claim 14
Dependent Claim
49 words
The improvement in a lined valve according to claim 10, wherein said generally tubular portion of said liner means extending through said valve body opening has a lateral wall thickness which is greater at least at certain areas than the said thickness of the liner means within the chamber.
Claim 15
Dependent Claim
35 words
The improvement in a lined valve according to claim 11, wherein an area of said greater lateral wall thickness of said liner means portion is positioned at the outer periphery of said valve body opening.
Claim 16
Dependent Claim
52 words
The improvement in a lined valve according to claim 12, wherein said tubular liner means portion has an outer wall at said area of greater wall thickness which defines a lateral enlargement of such portion which is of greater effective diameter than the diameter of said opening, for circumferentially overlapping the latter.
Claim 17
Dependent Claim
48 words
The improvement in a lined valve according to claim 13, wherein said lateral enlargement of said liner means portion comprises a ridge-like formation having at least one angular side, such side comprising a wall surface which is disposed at an acute angle with respect to said chamber axis.
Claim 18
Dependent Claim
42 words
The improvement in a lined valve according to claim 10, wherein said generally tubular portion of said liner means extending through said valve body opening has an outer wall surface which is disposed at an angle with respect to said chamber axis.
Claim 19
Dependent Claim
72 words
The improvement in a lined plug valve according to claim 15, including a retainer means for said plug; said retainer means including an inner frusto-conical surface which is angled with respect to the longitudinal axis of said chamber at an angle similar to that of said outer wall surface; said inner frusto-conical surface bearing against said outer wall surface to further effect said seal around said projecting portion of said valving member.
Claim 20
Dependent Claim
46 words
The improvement in a lined valve according to claim 10, wherein said generally tubular portion of said liner means extending through said valve body opening has an inner tubular surface defining a generally annular groove-like recess disposed generally transversely of the axis of such tubular portion.
Claim 21
Dependent Claim
27 words
The improvement in a lined valve according to claim 17, wherein said groove-like recess is disposed outwardly of said valve body beyond the said opening defined thereby.
Claim 22
Dependent Claim
44 words
The improvement in a lined valve according to claim 10, including a retainer means for said plug; said retainer means including a portion bearing against said extending portion of said liner to further effect said seal around said projecting portion of said valving member.
Claim 23
Dependent Claim
207 words
In a lined plug valve, of the type having a one-piece valve body with walls defining a generally cylindrical chamber for receiving a plug-like valve member which is rotatable within such chamber to open and close a flow path through the latter and defining an opening in axial alignment with said chamber which extends laterally through the walls of the valve body and communicates with an end of said chamber, the improvement comprising: liner means covering at least a major portion of said chamber; said liner means being a one-piece member of PTFE formed in place within said chamber and having an integral, generally tubular portion lining said opening and extending through and beyond said opening generally parallel to the axis of said chamber; a plug-type valving member disposed within said chamber; said valving member having an upper portion extending through and beyond the said valve body opening aligned with said chamber; and Said generally tubular portion of said liner means which extends through and beyond said opening having a part which encircles and contacts said upper portion of said valving member along a predetermined axial length of such portion whereby a seal is formed around at least part of said upper portion of said valving member.
Claim 24
Dependent Claim
207 words
In a lined plug valve, of the type having a one-piece valve body with walls defining a generally cylindrical chamber for receiving a plug-like valve member which is rotatable within such chamber to open and close a flow path through the latter and defining an opening in axial alignment with said chamber which extends laterally through the walls of the valve body and communicates with an end of said chamber, the improvement comprising: liner means covering at least a major portion of said chamber; said liner means being a one-piece member of PTFE formed in place within said chamber and having an integral, generally tubular portion lining said opening and extending through and beyond said opening generally parallel to the axis of said chamber; a plug-type valving member disposed within said chamber; said valving member having an upper portion extending through and beyond the said valve body opening aligned with said chamber; and Said generally tubular portion of said liner means which extends through and beyond said opening having a part which encircles and contacts said upper portion of said valving member along a predetermined axial length of such portion whereby a seal is formed around at least part of said upper portion of said valving member.
Claim 25
Dependent Claim
54 words
The improvement in a lined plug valve according to claim 20, wherein said part of said liner means portion which encircles said valving member portion defines a pair of mutually spaced annular encirclements each contacting said valving member portion at a position spaced along the length of such portion from the other such encirclement.
Claim 26
Dependent Claim
26 words
The improvement in a lined plug valve according to claim 21, wherein said liner means portion defines a recess between said pair of spaced annular encirclements.
Claim 27
Dependent Claim
44 words
The improvement in a lined valve according to claim 22, including a retainer means for said plug; said retainer means including a portion bearing against said extending portion of said liner to further effect said seal around said projecting portion of said valving member.
Claim 28
Dependent Claim
49 words
The improvement in a lined plug valve according to claim 22, wherein said generally tubular portion of said liner means extending through said valve body opening has a lateral wall thickness which is greater at least at certain area than the thickness of the liner means within the chamber.
Claim 29
Dependent Claim
35 words
The improvement in a lined plug valve according to claim 24, wherein an area of greater lateral wall thickness of said liner means portion is positioned at the outer periphery of said valve body opening.
Claim 30
Dependent Claim
123 words
A fully-lined multi-port valve, comprising: a valve body defining a chamber for a valve member which is movable therewithin to open and close a flow path through such chamber; said valve body further defining at least three port passages communicating with and leading to and from said chamber; and a lining of PTFE material covering the interior surfaces of said chamber and of each of said passages; said lining comprising a unitary structure formed in place within said body; at least certain of said port passages including generally continuous side walls with at least one pocket-like recess therein comprising a lateral enlargement of such passage, for receiving liner material from within such passage which may be distended from heat, pressure, or like conditions.
Claim 31
Dependent Claim
123 words
A fully-lined multi-port valve, comprising: a valve body defining a chamber for a valve member which is movable therewithin to open and close a flow path through such chamber; said valve body further defining at least three port passages communicating with and leading to and from said chamber; and a lining of PTFE material covering the interior surfaces of said chamber and of each of said passages; said lining comprising a unitary structure formed in place within said body; at least certain of said port passages including generally continuous side walls with at least one pocket-like recess therein comprising a lateral enlargement of such passage, for receiving liner material from within such passage which may be distended from heat, pressure, or like conditions.
References Cited (Backward Citations)
US3148896A
Cited
US3263697A
Cited
US3206530A
Cited
CH420760A
Cited
US3336939A
Cited
US3438388A
Cited
US3407838A
Cited
US3472485A
Cited
US3498318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |