Hose coupling

Claim 1

A hose end assembly comprising a metal hose coupling and a flexible, nonmetallic hose having an inner bore and an outer surface, said hose coupling including an insert member having an insert portion within said hose bore and a fitting portion to connect said hose end assembly with another part, said hose end assembly including a sleeve member extending over the outer surface of said hose for an axial length substantially coextensive with the insert portion within said hose bore, said sleeve member being deformably secured to said insert member intermediate said insert portion and said fitting portion, said sleeve member and said insert portion defining a radially extending abutment in engagement with the end of said hose, said insert having at least three annular ridges of uniform axial spacing on its surface in contact with said hose bore, said annular ridges being interspaced by annular grooves, said annular grooves having a relatively shallow inward slope on their outer sides, said sleeve member having a wall portion of substantially uniform wall thickness extending over said hose and being deformed radially inward at at least three annular crimp zones of uniform axial spacing to deform the hose portion radially inward of the crimp zone, the spacing between said crimp zones being slightly greater than the spacing between said annular ridges, said outermost crimp zone and said outermost annular ridge adjacent the end of said hose being in axial alignment, each successive crimp zone being spaced progressively further inwardly from each successive annular ridge and opposite a shallow inward slope whereby said hose is compressed radially to the greatest degree at said outermost crimp zone and is compressed a progressively lesser degree at each of the successive crimp zones progressing inwardly away from the end of the hose.