Static structures (e.g. – buildings) – With piercing or expanding earth anchor – Pivot means connecting separate fluke or hook
Patent
1986-08-04
1987-10-06
Pate, III, William F.
Static structures (e.g., buildings)
With piercing or expanding earth anchor
Pivot means connecting separate fluke or hook
411432, E02D 574
Patent
active
046973940
ABSTRACT:
Disclosed herein an improved ground anchor with recoverable steel rods which is characterized by the design of a socket having a plurality of tapered holes for fixing of steel rods from the top and two semi-conical wedges at the bottom of each hole to fix the steel rods by frictional force. The fixing holes are designed with external wall having tensile strength smaller than that of the steel rods so that application of any normal extractor to pull out the steel rods will distort and break the external wall of the holes first, the friction among the semi-conical wedges and steel rods will be overcome consequently, and thus the steel rods can be extracted and recovered easily. It is further characterized by the design of swingable arms, each with a left cutting edge in a form of slightly turning outward for cutting earth in order to ease its extension, and a recession at the external curved surface to reduce friction between the swingable arm and the earth. In case it is to be used at any place without ground water, drill bit, spring and spring-loaded ball may be omitted and a plurality of triangular blades can be installed at the front of the anchor head so that it can function as a drill bit simultaneously in order to lower construction cost.
REFERENCES:
patent: 1920141 (1935-07-01), Fischer
patent: 4592178 (1986-06-01), Lu
Pate III William F.
Smith Creighton
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