Fluid handling – Processes – Cleaning – repairing – or assembling
Patent
1997-02-04
1998-07-14
Walton, George L.
Fluid handling
Processes
Cleaning, repairing, or assembling
137317, 137318, 138 93, 138 97, F16L 55128, F16K 4300
Patent
active
057789193
ABSTRACT:
These objects and advantages are achieved by the inflatable gas pipeline stopper of the present invention, which is used to stop gas flowing through a pipeline when effecting repairs of the pipeline. The invention includes an attachment for attachment to a gas pipeline. A quick connect is provided to form an airtight seal between the stopper and the attachment. A junction box is attached at the other end of the quick connect. The junction box has two receptacles on the upper end thereof for receiving two shafts therein. Each shaft has a port and a valve. At the top of each shaft is a quick connect for attachment of a stuffing box thereto for insertion of air lines therethrough. Within the two shafts, and attached to the air lines, extend two moveable bag inserting and retracting plunger assemblies attached to an air source at the tops thereof. After the device is attached to a Mueller machine or other similar type machine, or a tee, the moveable bag inserting and retracting plunger assemblies are pushed through the shafts and the junction box to extend into the gas pipeline. Air is then supplied to the moveable bag inserting and retracting plunger assemblies to inflate the air bags to stop the flow of gas through the gas pipeline. One bag may be deflated to allow gas to flow into the pipeline flow stopper and up one of the shafts to a port to which another pipe may be attached to re-route the flow of gas about a break on a pipline.
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Custom Service Laboratories of N.J., Inc.
Walton George L.
LandOfFree
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