Patent ID: 8561426
Filing Date: 2013-10-22
Classification: F25B

Abstract:
1. A refrigeration system having a flow restriction, the flow restriction comprising: a threaded fitting having a beveled end that is convex; a tube that includes a flared tube end; a tubular insert comprising a flared insert end, an open end and a restricted throat therebetween, the tubular insert having selectively an inserted position and a prior-to-insertion position, the tubular insert in the inserted position extending into the tube, the tubular insert in the prior-to-insertion position being separated from the tube, the restricted throat existing in both the inserted position and the prior-to-insertion position, the tubular insert having an overall axial length that extends beyond the restricted throat when the tubular insert is in the prior-to-insertion position, the overall axial length of the tubular insert also extending beyond the restricted throat when the tubular insert is in the inserted position; and a nut with a tapered surface that is concave and substantially parallel to the beveled end of the threaded fitting, the nut being screwed onto the threaded fitting such that the flared tube end and the flared insert end are compressively clamped between the beveled end of the threaded fitting and the tapered surface of the nut, the flared tube end of the tube is substantially parallel to both the tapered surface of the nut and the beveled end of the threaded fitting.