Hose connecting assembly

Abstract

A hose connecting assembly of the present invention ensures a tight seal even when a hose 30 is bent and laid out in a narrow space and repeatedly is subject to vibrations under a low-temperature condition. The hose connecting assembly includes a connection tube 10, which is pressed into the hose 30. The hose 30 is designed to have an inner diameter change rate Dc of no greater than 23% under application of an inner pressure of about 0.49 MPa. Ring-shaped projections 21, 22, and 23 are formed on the outer circumferential surface of the connection tube 10. The ring-shaped projections 21, 22, and 23 are designed to make a diameter expansion rate T, which is defined by an inner diameter d1 of the hose 30 and an outer diameter D2 of the ring-shaped projections 21, 22, and 23, at least 25%. A hollow cylindrical end 18 is further formed on an end portion of the connection tube 10. It is preferable that the hollow cylindrical end 18 has a length of at least about 3 mm.

Dependencies are inferred from the claim text.