Mine roof expansion anchor and bail element

Details Mine roof expansion anchor and bail element Mine roof expansion anchor and bail element

E - Fixed Constructions

21

D

E21D 21/00 (2006.01) E02D 5/80 (2006.01) E21D 20/00 (2006.01)

Patent

CA 2090952

A bail element (10) having a medial portion (12) with a pair of legs (14, 16) extending integrally therefrom and a mechanical expansion anchor having a pair of shell halves (68, 70) and tapered plug (80) held in assembled relation by the bail. The bail legs are identical to one another and, prior to assembly with the shell halves and plug, have three distinct, linear portions (46, 48, 50) respectively extending at preferred angles or about 10°, 36° and 12.5° with respect to lines parallel to the bail centerline (A-A). The bail medial portion includes a pair of upstanding portions shown in a first embodiment (34, 36) and a second embodiment (54, 56) for puncturing a resin cartridge which may be installed with the anchor.

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