초록 ▼

A high pressure fluid fitting is provided for repeated connection and disconnection. The fitting includes a threaded nipple and a flanged nipple configured for abutting end-to-end mating with one another. A thrust bearing formed from a metal harder than the flanged nipple is positioned adjacent the

A high pressure fluid fitting is provided for repeated connection and disconnection. The fitting includes a threaded nipple and a flanged nipple configured for abutting end-to-end mating with one another. A thrust bearing formed from a metal harder than the flanged nipple is positioned adjacent the flange and on the side thereof opposite the mating face of the flanged nipple. A coupling nut with an inwardly extending annular flange is disposed over the flanged nipple and is threadedly engageable with the threaded nipple. The flange of the coupling nut moves against the thrust bearing and urges the nipples into tight sealing engagement. The smoothness and hardness and chemical dissimilarity of the thrust bearing avoid galling and other friction related damage to the fitting, and hence lead to an extended life for the fitting.

대표청구항 ▼

A high seal integrity fluid fitting comprising: a first member having a mating end, a fluid passage extending therethrough from the mating end and an array of threads; an annular metallic seal releasably disposed in sealing engagement with the mating end of the first member; a second member having a

A high seal integrity fluid fitting comprising: a first member having a mating end, a fluid passage extending therethrough from the mating end and an array of threads; an annular metallic seal releasably disposed in sealing engagement with the mating end of the first member; a second member having a mating end releasably disposed in sealing engagement with the annular metallic seal, the second member having a fluid passage extending from the mating end thereof and communicating with the fluid passage of the first member, the second member including an annular bearing surface facing generally oppositely from the mating end of the second member, said annular bearing surface defining inside and outside diameters; a continuous integrally formed annular thrust bearing having inside and outside diameters approximately equal to the respective inside and outside diameters of the bearing surface, said thrust bearing further having opposed parallel planar bearing surfaces, said thrust bearing defining a thickness of approximately 0.005 inch, said thrust bearing being mounted around said second member and in abutting relationship to the bearing surface thereof, the thrust bearing being formed from a material having a hardness (HRC) at lest ten points greater than the second member; a coupling nut disposed around the mating ends of the first and second members, the coupling nut having an array of threads threadedly engaged with the threads of the first member and having a substantially planar bearing surface engaging the thrust bearing, the coupling nut being formed from a material having a hardness (HRC) at least ten points less than the thrust bearing, whereby threaded tightening of the coupling nut with the first member causes the bearing surface of the coupling nut to slidably engage the thrust bearing for urging the thrust bearing tightly into the bearing surface of the second member and for urging the mating ends of the first and second members into tight sealing engagement with said annular metallic seal.