US3586031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow-control and testing plug for pipelines
Assignee: Individual
•
Filing: 1969-02-18
•
Granted: 1971-06-22
•
Expires: 1989-02-18
Abstract
Abstract A flow control and testing plug adapted to be applied to a pipeline or the like for the purpose of pressure testing the same. The plug has a valving mechanism for preventing entrance of dirt or foreign matter and for controlling inflow and outflow of air into and out of the pipeline, such mechanism being operable either manually or automatically. The automatic operation of the valving mechanism is preferably effected by liquid which is pumped into the pipeline at another location and which expels the air therefrom through the valved plug.
Inventors
- 👤 Franz Muller
- 👤 Helmut Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:20
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/11; F16L55/1108; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3084; Y10T137/309; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7871
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
202 words
A discharge and testing plug for the temporary closing of the open ends of pipelines during pressure testing by liquid and during the continued interior finishing of building constructions comprising a plug body having means for securing it to the pipeline end and having an air passage means for permitting the outflow of air past it, said body having a controlled closing device for shutting off said air passage means, thEreby to enable deaeration and aeration of the pipeline, said closing device being capable of automatic actuation by liquid which is brought into the pipeline and comprising a check valve including a sealing seat on the plug body and a gasket held on that end surface of the plug which is facing the interior of the line, said gasket being axially movable elastically in front of the sealing seat and being pressed against the sealing seat by the pressure of the testing liquid in the pipeline, said sealing seat comprising a ring-shaped bulge on the said end surface of the plug, said plug having a channel means surrounding the bulge and having a connecting channel disposed in back of said gasket for connecting the channel means with the interior of the pipeline.
Claim 2
Dependent Claim
202 words
A discharge and testing plug for the temporary closing of the open ends of pipelines during pressure testing by liquid and during the continued interior finishing of building constructions comprising a plug body having means for securing it to the pipeline end and having an air passage means for permitting the outflow of air past it, said body having a controlled closing device for shutting off said air passage means, thEreby to enable deaeration and aeration of the pipeline, said closing device being capable of automatic actuation by liquid which is brought into the pipeline and comprising a check valve including a sealing seat on the plug body and a gasket held on that end surface of the plug which is facing the interior of the line, said gasket being axially movable elastically in front of the sealing seat and being pressed against the sealing seat by the pressure of the testing liquid in the pipeline, said sealing seat comprising a ring-shaped bulge on the said end surface of the plug, said plug having a channel means surrounding the bulge and having a connecting channel disposed in back of said gasket for connecting the channel means with the interior of the pipeline.
Claim 3
Dependent Claim
47 words
A discharge and testing plug according to claim 1, characterized by the fact that the gasket is a small rubber disc held within the area of its peripheral edge, said disc in its central area being bulgeable towards the sealing seat, against the effect of its self-elasticity.
Claim 4
Dependent Claim
45 words
A discharge and testing plug according to claim 2, characterized by the fact that there are means comprising a crown of clamping pins with inward-bent tips, disposed on the end face of the plug for holding the gasket within the area of its peripheral edge.
Claim 5
Dependent Claim
41 words
A discharge and testing plug according to claim 2, characterized by the fact that there are means comprising a ring disc inserted in the end face of the plug body, for holding the gasket within the area of its peripheral edge.
Claim 6
Dependent Claim
43 words
A discharge and testing plug according to claim 1, characterized by the fact that the plug body has at least one essentially axial air channel, and has an outside seal in its outside surface which is to be inserted into the pipeline end.
Claim 7
Dependent Claim
34 words
A discharge and testing plug according to claim 5, characterized by the fact that the outside seal of the plug body comprises a bulge seal adapted to coact with the outlet-edge of the pipeline.
Claim 8
Dependent Claim
30 words
A discharge and testing plug according to claim 6, characterized by the fact that the plug body and said outside seal is constituted in one piece out of resilient material.
References Cited (Backward Citations)
US2544476A
Cited
US3421534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |