Hose end fitting

A hose end fitting for sealed connection to a multilayer hose, comprising:

• a first cylindrical member having a reduced diameter bore portion and an enlarged diameter bore portion connected to said reduced diameter bore portion, the reduced diameter bore portion being formed with an axial reduced bore extending therethrough and the enlarged diameter bore portion being formed with an axial enlarged bore extending therethrough;
• a second cylindrical member axially slidable within said axial enlarged bore of said enlarged diameter bore portion of said first cylindrical member and having a radial flange portion and an axial tubular portion extending from said radial flange portion, the radial flange portion being provided with a first sealing member, and the axial tubular portion being formed with a through bore communicating with said axial reduced bore of said reduced diameter bore portion of said first cylindrical member and provided with a second sealing member and said first sealing member serving so that said second cylindrical member is axially slid along and on said larger diameter bore portion of said first cylindrical member, as a piston, when internal pressure is applied to said hose fitting;
• hose end gripping means provided within said axial enlarged bore of said enlarged diameter bore portion of said first cylindrical member and radially expandable and constrictible, a hose within said hose gripping means and being gripped by said hose end gripping means which is radially constricted to grip said hose only by axial and outward movement to said second cylindrical member caused by internal fluid pressurization with the hose fitting;
• a plurality of receiving rings disposed adjacent to said hose end gripping means therebetween;
• and
• stopping means received in said enlarged diameter bore portion and adapted to limit axial movement of said second cylindrical member, said hose end gripping means and said receiving rings.

A method of coupling a multilayer hose end to a hose end fitting with a sealed connection wherein said fitting comprises:

• a first cylindrical member having a reduced diameter bore portion and an enlarged diameter bore portion connected to said reduced diameter bore portion, the reduced diameter bore portion being formed with an axial reduced bore extending therethrough and the enlarged diameter bore portion being formed with an axial enlarged bore extending therethrough;
• a second cylindrical member axially slidable within said axial enlarged bore of said enlarged diameter bore portion of said first cylindrical member and having a radial flange portion and an axial tubular portion extending from said radial flange portion, the radial flange portion being provided with a first sealing member, and the axial tubular portion being formed with a through bore communicating with said axial reduced bore of said reduced diameter bore portion of said first cylindrical member and provided with a second sealing member and said first sealing member serving so that said second cylindrical member is axially slid along and on said larger diameter bore portion of said first cylindrical member, as a piston, when internal pressure is applied to said hose fitting;
• hose end gripping means provided within said axial enlarged bore of said enlarged diameter bore portion of said first cylindrical member and radially expandable and constrictible;
• and
• stopping means received in said enlarged diameter bore portion and adapted to limit axial movement of said second cylindrical member and said hose end gripping means;
• comprising the steps of inserting said hose within said gripping means and radially constricting said hose end gripping means to grip said hose only by axial and outward movement of said second cylindrical member caused by internal fluid pressurization within the hose fitting.