Patent ID: 6764109
Filing Date: 2004-07-20
Classification: F16L

Abstract:
A hammer union comprisinga thread end having a conduit section providing a first flow passage, a set of coarse external threads, a first groove for receiving a seal assembly and an outwardly diverging mouth merging with the first groove, a nut end having a first terminus providing a nose having a seal seat transverse to the first flow passage and an outwardly diverging body merging with the seal seat and abutting the outwardly diverging mouth, a second terminus and a second flow passage, between the first and second termini, communicating with the first flow passage, a seal assembly comprising an annular metal insert received in the first groove and providing a second groove facing the thread end and facing the seal seat, and a resilient seal in the second groove sealably abutting the thread end and abutting the seal seat and substantially isolated by the annular metal insert from the first flow passage, and a hammer nut comprising a collar surrounding the nut end and having coarse internal threads mating with the coarse external threads thereby captivating the thread end to the nut end, drawing the outwardly diverging body into abutting relation with the outwardly diverging mouth and compressing the resilient seal and at least one ear projecting from the exterior of the collar for receiving an impact from a hammer.