| 摘要 |
<P>PROBLEM TO BE SOLVED: To equip a cap with a vent hole so as to alleviate resistance for a coupler at the time of mounting the cap on the coupler, thus to eliminate such a problem of a mounted cap being loosened or removed by the pressure of air, and to make it possible to carry a flawless coupler into a construction field. <P>SOLUTION: A coupler cap with a vent hole is intended to be mounted at the opening of a pipe coupler as the front face or skirt section of the coupler cap is formed with a vent hole. A cap 6A, the skirt section 6a of the cap, the front face 6b of the cap, protrusions 6c, 6d and the vent hole 10 are shown in Fig. <P>COPYRIGHT: (C)2008,JPO&INPIT |
