Boring or penetrating the earth – Bit or bit element – Core forming type
Patent
1998-04-24
2000-10-10
Lillis, Eileen Dunn
Boring or penetrating the earth
Bit or bit element
Core forming type
175320, 175402, 408204, 408238, E21B 1000, E21B 1714
Patent
active
061291633
ABSTRACT:
A flightless rock auger For drilling postholes through rock without the use of hydraulic pressure. The rock auger has a plurality of teeth extending downwardly at a selected angle from the edge of a cylinder connected to a quick connect shaft. The rock auger is utilized for drilling through rock and used in combination with a conventional flighted auger used for drilling postholes in dirt and clay. During a posthole drilling operation, the rock auger is substituted for the flighted auger as needed for drilling through and remove rock or other hard material such as concrete fron the posthole. The rock auger is designed for use at very low revolutions per minute and utilizes only the weight of the auger and shaft and does not require any additional hydraulic pressure for cutting a circular hole through the rock and forming a plug which is to be lodged in the cavity of the rock auger cylinder to be removed from the posthole. The quick connection shaft enables the conventional flighted auger to be quickly substituted for the rock auger to facilitate fast removal of soft dirt from the posthole. The rock auger provides an alternative method for utility companies to drill postholes for electric poles, telephone poles, pilings, and the like without the use of explosives, thereby providing for safer excavation.
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Exhibit "A" shows an core drill auger haivng Road, Sheperdsville, KY 40165.
Hamilton Charles
Hamilton Gary
Carrithers David W.
Lee Jong-Suk
Lillis Eileen Dunn
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