Static structures (e.g. – buildings) – With piercing or expanding earth anchor
Patent
1976-07-26
1977-12-27
Purser, Ernest R.
Static structures (e.g., buildings)
With piercing or expanding earth anchor
85 11, 175 18, E02D 574
Patent
active
040646653
ABSTRACT:
An ice anchoring device, and particularly an ice hammer, having a relatively thin walled, partially open or fully closed channel, with opposed interior walls at at least a portion of the channel, and, preferably, parallel outer walls, which, when impacted upon ice, fractures the ice internally of the channel while producing a basically undisturbed void in the ice sufficient to accommodate the anchoring device. Preferably the channel is in the form of an initially closed tube having an inwardly sloping bevel from a cutting edge defined at the end of the tube, and an opening in the tube spaced back from the end of the tube to facilitate removal of fractured ice. The method is practiced by inserting the tube into ice with force and localizing the destructive forces inwardly to the volume within the channel thereby avoiding weakening and fracturing of the remaining exterior portion of the ice in which the device is anchored.
REFERENCES:
patent: 286599 (1883-10-01), Fitzgerald
patent: 1882906 (1932-10-01), Renfer et al.
patent: 2321101 (1943-06-01), Openshaw
patent: 2955805 (1960-10-01), Jones, Jr. et al.
patent: 3208538 (1965-09-01), Pitcher
patent: 3735434 (1973-05-01), Penberthy
Lowe Greg E.
Lowe Michael R.
Favreau Richard E.
Lowe Alpine Systems, Inc.
Purser Ernest R.
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