Patent ID: 7490870

Claim:
A hydraulic flange connection having a formed, generally cylindrical, tube member in permanent physical conjointness with a captive contoured sleeve member, said conjointness including: i. said contoured sleeve member including: a. a body portion having an axial cylindrical bore portion of predetermined diametral and axial extents; b. a cylindrical outer portion, tapering at one axial end and, at an annular step thereof, into a generally conical portion merging into an outer annular end surface substantially perpendicular to and abutting an outer end of said body cylindrical bore portion; and c. said cylindrical outer portion, at another axial end thereof, merging into an annular outer end surface, the latter having an inner circular edge defining the maximum diametral extent of a formed, bowl-shaped, open, annular recess portion, with the minimum diametral extent thereof being defined by a raised annular inner end surface portion, axially recessed relative to said annular outer end surface, with said raised annular inner end surface portion being substantially perpendicular to an abutting inner end of said body cylindrical bore portion; and ii. said generally cylindrical tube member being in permanent physical conjointness with said contoured sleeve member and having: a. a predetermined outer diametral extent and a predetermined wall thickness; b. a tube member cylindrical portion extending into and through said outer end of said body cylindrical bore portion of said sleeve member; c. an upset, radial, integral flange portion on one end thereof and interconnected with said tube member cylindrical portion; d. said radial flange portion including an axially outwardly-directed, open, curved, circumferential, radial groove, with an inner surface of said flange portion conforming to and adjoining a complementary surface of said sleeve member bowl-shaped outer recess portion, both axially and radially; e. said radial flange portion also having spaced, concentric, annular end surfaces in a substantially parallel plane relationship with said sleeve member annular outer end surface; and f. said radial flange portion further including an inner recess portion that envelops said sleeve member raised annular, inner, end surface portion.