Expanding anchoring device

Details Expanding anchoring device Expanding anchoring device

1988-08-11

1990-02-13

Safavi, Michael

Static structures (e.g., buildings)

With piercing or expanding earth anchor

Spreader cam or plate

52155, 52159, E02D 580

Patent

active

048995010

ABSTRACT:
An expanding anchoring device comprising a shaft, base plate, and two pivotally mounted expansion members for engaging the inner surface of a pre-drilled hole.
The expansion members, in two forms of the anchoring device, can penetrate and expand into the sidewall of a pre-drilled hole by cutting a lateral notch in the sidewall.
In another form of this expanding anchoring device, the expansion members spring open when they are aligned with a pre-cut lateral notch in the sidewall of a pre-drilled hole.

REFERENCES:
patent: 825587 (1906-07-01), Cook
patent: 857751 (1907-06-01), Parker
patent: 1455163 (1923-05-01), Blackburn
patent: 1643769 (1927-09-01), Heinrich
patent: 1899520 (1933-02-01), Nettenstrom
patent: 2490187 (1949-12-01), Young
patent: 2660276 (1953-11-01), McKee
patent: 2672961 (1954-03-01), Mead et al.
patent: 2899029 (1959-08-01), Ballew
patent: 3349526 (1967-10-01), Schuster
patent: 3778943 (1973-12-01), Day
patent: 4491447 (1985-01-01), Smith et al.

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