Expansible anchor and method of making the same

Details Expansible anchor and method of making the same Expansible anchor and method of making the same

1994-08-29

1996-07-16

Wilson, Neill R.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Made up of plural expansible segments or sections

411 55, 411 59, F16B 1304, F16B 1306

Patent

active

055361226

ABSTRACT:
An expansible anchor of metal for anchoring in a hole drilled in masonry has a bolt with several connected expander cones forming a thread and an expansible sleeve provided with an internal thread matching the expanding cones. To achieve high holding fores and low draw-in force, expansible portions are formed at uniform intervals along the internal thread of the expansible sleeve by U-shaped channels. The expansible sleeve is manufactured from powdered metal in an injection molding method using a system of binders combined with subsequent removal of binders and sintering, and an injection-molding tool having a removable thread core for the internal thread of the expansible sleeve.

REFERENCES:
patent: 2685221 (1954-03-01), Barrett
patent: 4270434 (1981-06-01), Bucheli
patent: 5413441 (1995-05-01), Heminger et al.

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