| 摘要 |
Closure means for fastening a cover over the open end of a cylindrical drum, utilizing an annular split ring contoured to mate the cover to the drum. Included are a pair of depending lugs, extending from the ring on opposite sides of the split. Each of the lugs has a substantially parallel lateral face and a transverse opening therethrough. Spacer means are provided between the lugs. A tie bolt mounted through the openings of the lugs is tightened so the lugs are drawn together, contracting the ring. The spacer means between the lugs form a pivot point with the lugs, drawing the ring in a direction toward the pivot point.
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