Patent US3799182A successfully refreshed from Google Patents.
US3799182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Add-on stopper valve for existing piping
Assignee: Gas Technology Institute
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Filing: 1972-04-28
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Granted: 1974-03-26
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Expires: 1992-04-28
Abstract
Abstract The invention comprises an add-on valve which includes, generally, a holding chamber which is adapted to be fixedly secured to a pipe, a gate valve assembly which is adapted to be removably affixed to the holding chamber, a saw chamber assembly including a saw for sawing an opening into the pipe, a pipe plug assembly including a closure which is operable to block the flow of fluid in the pipe, an insertion chamber assembly for inserting the pipe plug assembly into the holding chamber, and a completion bonnet for completing the assembly of the add-on valve.
Inventors
- 👤 G Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:18
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/04; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/0441; Y10T137/0458; Y10T137/0463; Y10T137/0469; Y10T137/0486; Y10T137/598; Y10T137/612; Y10T137/6123
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
410 words
An add-on valve which can be added to an existing piping system at any point on a pipe in said system without interruption of the flow of fluid therein comprising, in combination: a cylinder shaped holding chamber formed to be fixedly secured to a pipe and having an opened end; a gate valve assembly adapted to be removably affixed to said opened end of said holding chamber and having a gate valve operable to seal said opened end; a saw chamber assembly having saw means disposed therein for sawing an opening in said pipe, said saw chamber assembly being adapted to be removably affixed to said gate valve assembly and to seal said opened end of said holding chamber when said gate valve is opened, means coupled to said saw means to operate said saw means when said gate valve is opened to saw an opening in said pipe; a pipe plug assembly including a pipe plug adapted to be secured within said holding chamber to seal the open end thereof to permit said gAte valve assembly to be removed, a pipe plug shaft extending through said pipe plug and longitudinally movable therein, and a closure valve affixed to one end of said pipe plug shaft and adapted to block the flow of fluid in said pipe when disposed therein; an insertion chamber assembly adapted to be removably affixed to said gate valve assembly to seal said opened end of said holding chamber and formed to receive therein said pipe plug assembly, an insertion shaft adapted to be coupled to the other end of said pipe plug shaft extending through said insertion chamber assembly and longitudinally movable therein to operate said pipe plug shaft, said insertion chamber being removably affixed to said gate valve assembly after sawing an opening in said pipe and after said saw chamber assembly has been removed and said gate valve has been closed, said pipe plug being affixed within the opened end of said holding chamber by opening said gate valve and operating said insertion shaft, said pipe plug sealing said opened end upon being affixed therein; and a completion bonnet adapted to be affixed to and to seal said opened end of said holding chamber after removing said gate valve assembly and formed to permit said pipe plug shaft to be operated to extend said closure valve into said pipe through said opening sawn therein to block the flow of fluid through said pipe.
Claim 2
Dependent Claim
410 words
An add-on valve which can be added to an existing piping system at any point on a pipe in said system without interruption of the flow of fluid therein comprising, in combination: a cylinder shaped holding chamber formed to be fixedly secured to a pipe and having an opened end; a gate valve assembly adapted to be removably affixed to said opened end of said holding chamber and having a gate valve operable to seal said opened end; a saw chamber assembly having saw means disposed therein for sawing an opening in said pipe, said saw chamber assembly being adapted to be removably affixed to said gate valve assembly and to seal said opened end of said holding chamber when said gate valve is opened, means coupled to said saw means to operate said saw means when said gate valve is opened to saw an opening in said pipe; a pipe plug assembly including a pipe plug adapted to be secured within said holding chamber to seal the open end thereof to permit said gAte valve assembly to be removed, a pipe plug shaft extending through said pipe plug and longitudinally movable therein, and a closure valve affixed to one end of said pipe plug shaft and adapted to block the flow of fluid in said pipe when disposed therein; an insertion chamber assembly adapted to be removably affixed to said gate valve assembly to seal said opened end of said holding chamber and formed to receive therein said pipe plug assembly, an insertion shaft adapted to be coupled to the other end of said pipe plug shaft extending through said insertion chamber assembly and longitudinally movable therein to operate said pipe plug shaft, said insertion chamber being removably affixed to said gate valve assembly after sawing an opening in said pipe and after said saw chamber assembly has been removed and said gate valve has been closed, said pipe plug being affixed within the opened end of said holding chamber by opening said gate valve and operating said insertion shaft, said pipe plug sealing said opened end upon being affixed therein; and a completion bonnet adapted to be affixed to and to seal said opened end of said holding chamber after removing said gate valve assembly and formed to permit said pipe plug shaft to be operated to extend said closure valve into said pipe through said opening sawn therein to block the flow of fluid through said pipe.
Claim 3
Dependent Claim
100 words
The add-on valve of claim 1, wherein said holding chamber has both interior and exterior threads formed on the opened end thereof, said gate valve assembly being threaded to threadingly engage with said exterior threads on said holding chamber, said pipe plug being threaded to threadingly engage with said interior threads on said holding chamber, said insertion chamber being provided with exterior threads and said gate valve assembly being interiorly threaded to threadingly engage with said exterior threads on said insertion chamber said completion bonnet having interior threads thereon for threading engagement with the exterior threads on said holding chamber.
Claim 4
Dependent Claim
48 words
The add-on valve of claim 1, wherein said pipe plug shaft is slidably received within said pipe plug whereby said pipe plug shaft is longitudinally movable with respect to said pipe plug by applying a longitudinal force on it by means of a piston, diaphragm or the like.
Claim 5
Dependent Claim
42 words
The add-on valve of claim 1, wherein said pipe plug and said pipe plug shaft are correspondingly threaded whereby said pipe plug shaft is longitudinally movable with respect to said pipe plug by rotating it to thread it through said pipe plug.
Claim 6
Dependent Claim
41 words
The add-on valve of claim 1, wherein said closure valve of said pipe plug assembly comprises a flexible cylinder which expands or balloons when forcibly urged against the interior of said pipe to thereby block passage of fluid through said pipe.
Claim 7
Dependent Claim
105 words
The add-on valve of claim 1, wherein said completion bonnet comprises a bonnet shaft adapted to be coupled to said other end of said pipe plug shaft extending through said completion bonnet and longitudinally movable therein to operate the latter, said completion bonnet being adapted to be affixed to and to seal said opened end of said holding chamber after removing said gate valve assembly, means affixed to said bonnet shaft to operate said bonnet shaft and said pipe plug shaft coupled thereto to extend said closure valve into said pipe through said opening sawn therein to block the flow of fluid through said pipe.
Claim 8
Dependent Claim
43 words
The add-on valve of claim 1, wherein said pipe plug shaft extends through said completion bonnet and has means affixed to its end for operating it to extend said closure valve into said pipe to block the flow of fluid through said pipe.
Claim 9
Independent Claim
265 words
A method of affixing an add-on valve to an existing piping system at any point on a pipe in said system without interruption of the flow of fluid therein comprising the steps of: affixing a cylinder shaped holding chamber having an open end to a pipe; removably affixing a gate valve assembly having a gate Valve to said open end of said holding chamber; affixing a saw chamber assembly having a chamber for sealing the open end of said holding chamber and saw means disposed within said chamber for sawing an opening in said pipe to said gate valve assembly; opening said gate valve of said gate valve assembly and operating said saw means to saw an opening in said pipe; withdrawing said saw means into said chamber of said saw chamber assembly, closing said gate valve, and removing said saw chamber assembly from said gate valve assembly; affixing within said gate valve assembly an insertion chamber having therein a pipe plug assembly including a pipe plug shaft, a pipe plug movably affixed on said pipe plug shaft and a closure valve affixed to one end of said pipe plug shaft; opening said gate valve and affixing said pipe plug within said holding chamber to seal the open end thereof; removing said insertion chamber and said gate valve assembly from said holding chamber; and affixing a completion bonnet to said open end of said holding chamber to permit said pipe plug shaft to be operated to extend said closure valve into and out of said pipe to block and permit the flow of fluid therein.
Claim 10
Independent Claim
265 words
A method of affixing an add-on valve to an existing piping system at any point on a pipe in said system without interruption of the flow of fluid therein comprising the steps of: affixing a cylinder shaped holding chamber having an open end to a pipe; removably affixing a gate valve assembly having a gate Valve to said open end of said holding chamber; affixing a saw chamber assembly having a chamber for sealing the open end of said holding chamber and saw means disposed within said chamber for sawing an opening in said pipe to said gate valve assembly; opening said gate valve of said gate valve assembly and operating said saw means to saw an opening in said pipe; withdrawing said saw means into said chamber of said saw chamber assembly, closing said gate valve, and removing said saw chamber assembly from said gate valve assembly; affixing within said gate valve assembly an insertion chamber having therein a pipe plug assembly including a pipe plug shaft, a pipe plug movably affixed on said pipe plug shaft and a closure valve affixed to one end of said pipe plug shaft; opening said gate valve and affixing said pipe plug within said holding chamber to seal the open end thereof; removing said insertion chamber and said gate valve assembly from said holding chamber; and affixing a completion bonnet to said open end of said holding chamber to permit said pipe plug shaft to be operated to extend said closure valve into and out of said pipe to block and permit the flow of fluid therein.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |