SEAL HEAD FOR LOCK BOLT PRESSURIZATION/EXPANSION

摘要

PROBLEM TO BE SOLVED: To provide a seal head for lock bolt pressurization/expansion capable of securely holding a sleeve and letting pressure fluid for pressurization/expansion flow in in even a lock bolt covered with the short sleeve. SOLUTION: A cylindrical housing 34 is composed of a space part 32 having a sleeve insertion port 31 and small diameter and a space part 33 having large diameter. An annular seal packing 35 on a sleeve insertion port side inserted into the space part 33 having large diameter, an annular seal packing 36 on a stopper side, and an adapter ring 37 arranged between them are pressed by a fixed ring 38 fitted from the opposite side to the sleeve insertion port 31. For this reason, length (depth) of a sleeve receiving clearance between an end part on a sleeve insertion side and a step 39 of the fixed ring 38 is reduced to cope with the lock bolt covered with the short sleeve. COPYRIGHT: (C)2005,JPO&NCIPI