Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1985-05-06
1987-01-13
Moon, Charlie T.
Metal working
Method of mechanical manufacture
Assembling or joining
292405, 29456, 29526R, 294265, B23P 1100
Patent
active
046353372
ABSTRACT:
The invention as shown herein includes an apparatus and method for positioning an anchoring device in the form of a coil in a pre-drilled hole for firmly engaging a lag screw or other member. The coil consists of a series of turns and may be made of steel or plastic or combination thereof which, in use circumferentially expands in the wall of the hole and helically elongates toward the bottom of the hole. The lag members used herewith can be removed and reinserted into the embedded coil as required. Depth indicating means is placed on the setting apparatus such as a lag screw or other tool so the anchor device or coil can be positioned to a precise depth. The anchor device or coil may be formed of a suitable diameter metallic wire or may be molded or die cast from a metal or plastic material. If molded the coil includes a thin membrane which provides stability to the coil during its storage and positioning in the hole while allowing the lag member to easily rupture the membrane for elongation and expansion of the coil during its use. A positioning tool is also included herein which allows the user to precisely and quickly position the coil into the hole whereupon once lowered to its correct depth the tool is then removed and the lag screw or other member is then inserted into the hole where it is firmly held by the anchor device.
REFERENCES:
patent: 556082 (1896-03-01), Boeddinghaus
patent: 806406 (1905-12-01), Farrington
patent: 906691 (1908-12-01), Chenoweth
patent: 1125186 (1915-01-01), Schneider
patent: 1438269 (1922-12-01), Sehrt
patent: 1966520 (1934-07-01), Raynes
patent: 2622466 (1952-12-01), Venden Bos et al.
patent: 2690693 (1954-10-01), Campbell
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