Static structures (e.g. – buildings) – Assembled in situ-type anchor or tie
Patent
1987-01-20
1987-11-17
Perham, Alfred C.
Static structures (e.g., buildings)
Assembled in situ-type anchor or tie
52704, 405259, 411 75, 411 78, 411 79, 411 80, E04B 138, F21D 2000, F16B 1304
Patent
active
047064374
ABSTRACT:
The invention is an improved anchor for machine bolts and other similar fastening devices in masonry or other materials. The improved anchor consists primarily of a two-piece body structure. When in use the two-piece body structure is arranged for receiving a fastening device, such as a machine bolt or other similar fastener. The two-piece body structure is cylindrical on the exterior thereof with the offset between the first and second of the two pieces of the body structure being a cut or separation through the body structure at an angle to the longitudinal centerline of the two-piece body structure. Each of the two pieces of the two-piece body structure has a plurality of saw tooth-like cuts or serrations on a portion of the exterior surface. The saw tooth-like cuts on the first piece of the two-piece body structure being located 180.degree. from the saw tooth-like cuts on the second piece. The first piece, which is the bottom portion of the two-piece anchor, is threaded to receive a threaded fastening device; the second piece, which is the top portion of the two-piece anchor, has an elongated passage way therethrough to allow movement of the second piece when the threaded fastening device is screwed into and tightened in the threaded portion of the first piece. The tightening causes the two pieces to slide in opposite directions on the angled offset surface so that the saw tooth-like cuts bite or grip into the sides of the hole in the masonry or other material of the structure in which the improved anchor has been inserted. The improved anchor is easily removed by loosening the fastening device and tapping it.
REFERENCES:
patent: 737555 (1903-08-01), Dorn
patent: 922980 (1909-05-01), Vernon et al.
patent: 2706499 (1955-04-01), Grable
patent: 3478641 (1969-11-01), Dohmeier
Finch Walter G.
Perham Alfred C.
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