CRIMPED TUBE-TO-PORT HYDRAULIC FITTINGS

摘要

The present invention relates to an improved hydraulic coupling which forms contact seals to fluidly connect a tube to a tapered port by crimping (tube-to--port). The contact seal includes a metal-to-metal seal with a secondary elastomeric seal. A crimped collar (409) of the port retains a compression ring (308) in a metal-to-metal contact. Another embodiment of the invention provides a transverse fluid coupling (401) for a tube (405) with the port (404) being part of the bolt/body assembly (402/403) of a "banjo" coupling. The crimped collar of the present invention is removed from the contact seal so that flexural forces and vibration of the coupling can be better resisted. The port, tube, and compression ring define a pocket (413) for the location of a sealing ring (407) disposed in the pocket. The pocket has a cross-sectional area larger than the cross- sectional area of the sealing ring. The tube may include a lip (410) having an outwardly facing tapered surface substantially complementary to the tapered surface (406) of the port. The compression ring includes an internal angled seat (414) contacting the tube. The compression ring also includes a reverse taper (417) contacting the collar so that the reverse taper facilitates the collar retaining the compression ring into sealingcontact with the tapered surface.