Reusable type hose end fitting

In a reusable-type hose end fitting having a through-bored stem portion for location in part within the bore of a hose, and a ferrule portion for location about an end portion of the hose, the stem portion having a first zone which is formed with a male screw thread and a second zone which locates within the bore of the hose when the fitting is secured to the hose end, the ferrule portion having a first zone which is formed with a female screw thread which is engageable with the male thread on the stem portion and a second zone which locates about the second zone of the stem portion to define a generally annular space in which the hose wall is located when the fitting is secured to the end portion of the hose;

• the improvement which is characterized in that the second zone of the stem portion is formed with at least three tapered regions which taper convergently toward the end of the stem portion, in that adjacent tapered regions are separated by a land with a length in the axial direction of the stem portion which is less than the length of the adjacent tapered regions, in that the ferrule portion is formed in its second zone with at least two annular buttresses which are spaced apart in the axial direction of the ferrule portion by a distance approximately equal to the spacing between the lands of the stem portion and which are so disposed that, as the stem portion is advanced into the ferrule portion, each land advances in an axial direction past at least one of the buttresses, in that the crests of the buttresses have a diameter which increases in the direction of increasing diameter of the stem portion, and in that the crests of the buttresses lie around a first imaginary cone which subtends an angle .beta. which is smaller than an angle .alpha. of a second imaginary cone substantially along which the tapered regions of the stem portion are disposed.