Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1979-04-11
1981-03-10
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
29271, 29526R, 403408, 411368, 411401, B23Q 300, B25B 2714, F16B 3500
Patent
active
042545420
ABSTRACT:
A combination structural steel erection bolt, drift pin and nut assembly replaces heretofore required long erection bolts and drift pins or pry bars in erecting floor beams to upright columns of steel framework for buildings and the like to form the initial connection between the floor beams and columns and to align the bolt holes for receiving the permanent bolts. The assemblies of this invention include a bolt having a head with an elongated shank divided into an enlarged diameter smooth surfaced grip portion adjacent the head to snugly fit the bolt holes, a tapered central portion for directing the structural steel elements to the grip portion, and an elongated externally threaded portion projecting from the small end of the tapered portion for freely fitting into the bolt holes. A sleeve loosely embraces the shank and a nut threaded on the threaded portion of the shank forces the sleeve against a structural element causing it to ride up the tapered portion to the grip portion thereby aligning the holes of the structural elements that are to be bolted together. When the structural elements are thus drawn together the other bolt holes on these elements are aligned and shorter permanent bolts are then used to permanently secure the elements together. The combination nut and bolt assembly of this invention is then removed for reuse.
REFERENCES:
patent: 2768434 (1966-10-01), Taylor
patent: 3962775 (1976-06-01), King
patent: 4005629 (1977-02-01), Franklin
patent: 4014089 (1977-03-01), Sato et al.
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