E - Fixed Constructions – 04 – C
Patent
E - Fixed Constructions
04
C
26/165, 24/9
E04C 5/12 (2006.01) B24B 31/00 (2006.01) B24B 31/14 (2006.01) G09B 29/00 (2006.01)
Patent
CA 1276777
ABSTRACT OF THE DISCLOSURE An annular steel anchor grip divided into individual wedge sections is used to anchor a tension element in a prestressed concrete structure. Prior to forming the in- dividual wedge sections from an axially extending annular wedge blank, the inside surface of the blank is threaded forming circumferentially extending teeth so that the wedge can grip the tension element and provide the requisite friction co- efficient in the anchorage. To prevent the sharp teeth formed in the threading step from cutting into the surface of the tension element, the teeth are ground down in a tumbling operation in which the wedge sections are mixed together with ceramic grinding bodies in a tumbling drum. The grinding bodies have bends in at least a portion of their surfaces and the bends have a smaller radius than the radius of the threaded inside surface of the wedge.
487360
Langwadt Otmar
Westerweller Wolfgang
Dywidag-Systems International Gmbh
Fetherstonhaugh & Co.
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