Gas recovery bag

JP1831424SActive Publication Date: 2026-07-13OSAKA GAS CO LTD
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Patent Information

Application Number
JP2026000497D
Authority / Receiving Office
JP · JP
Patent Type
Designs
Current Assignee / Owner
Filing Date
2026-01-14
Publication Date
2026-07-13
Estimated Expiration
2051-01-14

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Abstract

The article relating to the present design is primarily a gas recovery bag used to recover gas from inside gas pipes during gas pipe construction. The article relating to the present design has a bag body formed by heat-sealing the outer edges of a pair of overlapping flexible sheet materials together, and a nozzle attached to the front of the bag body and extending in an L-shape. As shown in Reference Figure 1, which shows the state of use, when the nozzle is connected to the inside of the gas pipe while the bag body is contracted, as shown in Reference Figure 2, which also shows the state of use, the gas inside the gas pipe flows into the bag body through the nozzle as the bag body expands.
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