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US3109673A
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Coupling for flareless tubes
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ES225161A1
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A quick separation coupling device (Machine-translation by Google Translate, not legally binding)
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US2837352A
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Swivel coupling with resilient ring to bias detent means
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US2828978A
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Locking ring structure for pipe couplings
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US2884981A
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Coupling nut with cam operated pin means for releasably engaging a nut locking means
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US2693377A
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Biting ring pipe coupling with helical cutting edge
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US2693375A
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Double-biting ring pipe coupling
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US2693376A
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Double-biting ring pipe coupling
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US2823935A
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Pipe coupling with deformable ring for flareless pipe
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US2693374A
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Pipe coupling with deformable ring for flareless pipe
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US2603175A
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Method and means for making wrought fittings
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US2500890A
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Metal working method and mechanism
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US2474178A
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Pipe coupling
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US2460667A
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Fitting
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US2460668A
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Fitting
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US2414995A
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Pipe coupling
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US2414184A
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Pipe coupling
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US2417536A
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Pipe coupling
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US2460666A
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Fitting
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US2460665A
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Solder fitting
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