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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Construction
Class Information
Number: 175/388
Name: Boring or penetrating the earth > Bit or bit element > Bit with leading portion (e.g., pilot) forming smaller diameter initial bore > Leading portion is a screw
Description: Apparatus in which the leading or pilot portion describes a helical convolution, said convolution extending through at least 180°.










Patents under this class:

Patent Number Title Of Patent Date Issued
8646547 Chisel ice drill Feb. 11, 2014
7887263 Ground anchor Feb. 15, 2011
7779938 Swivel for use in installing large diameter casing Aug. 24, 2010
7140456 Easy hold power auger Nov. 28, 2006
7128174 Drilling and anchoring device for diverse applications Oct. 31, 2006
6955234 Auger bit Oct. 18, 2005
6824331 Screw form anchor device Nov. 30, 2004
6457909 Multi-purpose anchor bolt assembly Oct. 1, 2002
6296068 Planting system Oct. 2, 2001
6283231 Soil displacing screw auger and method for making a concrete pile with this auger Sep. 4, 2001
6073710 Combination drilling member Jun. 13, 2000
5476149 Pilot bit Dec. 19, 1995
5454435 Device for facilitating insertion of a beach umbrella in sand Oct. 3, 1995
4901800 Cultivator tool for planting seedlings Feb. 20, 1990
4623025 Soil-displacement drill and method for manufacturing a pile Nov. 18, 1986
4496011 Tool for forming earth holes having fixed walls and method therefor Jan. 29, 1985
4214617 Stump cutter Jul. 29, 1980
4121668 Motor-driven cultivator with counter-rotating auger shafts Oct. 24, 1978
4031973 Placer mining tool Jun. 28, 1977











 
 
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