Patent ID: 7556065

Claim:
A flexible tube for use in transferring a high-pressure fluid of 70 MPa, said flexible tube comprising: a metal bellows tube including a first end, a second end and a bellows-shaped tube wall, said bellows-shaped tube wall including bellows having a ridge and a valley formed therein, said ridge and said valley having a V-shaped sectional shape, said bellows-shaped tube wall being formed from stainless steel and having a thickness of 0.1-0.5 mm, said ridge having a height of 1-4 mm, and said bellows having a pitch of 2 mm or less; and a tubular metal braid having a first end and a second end and covering an outside of said flexible tube, said first and second ends of said tubular metal braid joining with said first and second ends of said metal bellows tube, respectively, and said tubular metal braid being a densely braided layer superposed in 4 to 5 layers on an outside of said metal bellows tube, said densely braided layer comprising strands made of stainless steel and having a strand diameter of 0.3-0.6 mm and a crossing angle of 50-120 degrees, so that said tubular metal braid suppresses elongation of said bellows caused by the high-pressure fluid in said metal bellows tube.