Patent ID: 7469718
Filing Date: 2008-12-30
Classification: A61M,F16L,Y10S,Y10T

Abstract:
1. A quick disconnect coupler, operatively interconnected with a cryogenic fluid transfer apparatus, said coupler comprising in combination: a. a generally cylindrical coupler body having a through bore and a front cylindrical portion with a first cavity open on one end, separated from a rear portion with a second cavity open on another end, via an apertured intermediate wall portion perpendicular on a first side facing said first cavity and including a tapered wall portion on a second side facing said second cavity; b. said first cavity having an inner peripheral surface surrounding an outer peripheral surface of a laterally severed tubular bushing, with the condition of being severed permitting a predetermined amount of radial expansion and contraction of said bushing; c. a generally tubular adaptor having a second through bore and a cylindrical rear portion, operatively attached to said cryogenic fluid transfer apparatus, a cylindrical, apertured, intermediate portion including a valve guide, located in said through bore, and a cylindrical front portion sealingly, operatively, connected with to said coupler body rear portion; d. an annular interface seal, spaced from said coupler body intermediate wall portion, said spacing of said seal permitting a limited amount of axial movement of said tubular bushing; e. a valve, normally biased to a closed position, interposed between said valve guide and said coupler body tapered wall portion, with a valve head portion shutting said apertured intermediate wall portion in the closed position thereof; and f. a generally tubular coupling sleeve having a frusto-conical front inlet portion separated from a cylindrical outlet portion via an annular end face adjoining said front inlet portion, said coupling sleeve being operatively secured to said coupler body front portion, with said annular end face physically abutting said first cavity.