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Class Information
Number: 175/394
Name: Boring or penetrating the earth > Bit or bit element > With helical-conveying portion
Description: Apparatus in which the bit is provide with a screw shaped surface extending axially thereof for conveying cuttings away from the end of the bit, said screw shaped surface extending through a convolution of at least 180°.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4974688 |
Steerable earth boring device |
Dec. 4, 1990 |
| 4967855 |
Drilling tool |
Nov. 6, 1990 |
| 4953642 |
Rock drill bit |
Sep. 4, 1990 |
| 4951761 |
Rock drill |
Aug. 28, 1990 |
| 4949795 |
Rotary rapid excavation system |
Aug. 21, 1990 |
| 4942931 |
Drilling tool having frictionally rotatable drilling head |
Jul. 24, 1990 |
| 4942932 |
Auger drilling system |
Jul. 24, 1990 |
| 4924953 |
Rock drill |
May. 15, 1990 |
| 4917196 |
Excavating tooth for an earth auger |
Apr. 17, 1990 |
| 4915182 |
Cutter elements for hollow drill bit |
Apr. 10, 1990 |
| 4913246 |
Rotary gad for ground drill |
Apr. 3, 1990 |
| 4901800 |
Cultivator tool for planting seedlings |
Feb. 20, 1990 |
| 4889200 |
Rock drill |
Dec. 26, 1989 |
| 4883135 |
Apparatus for rock drill |
Nov. 28, 1989 |
| 4848489 |
Drag drill bit having improved arrangement of cutting elements |
Jul. 18, 1989 |
| 4807710 |
Earth auger for planting bulbs |
Feb. 28, 1989 |
| 4794994 |
Drag drill bit having improved flow of drilling fluid |
Jan. 3, 1989 |
| 4793740 |
Drilling system |
Dec. 27, 1988 |
| 4742656 |
Earth anchor with multi-sided blade |
May. 10, 1988 |
| 4727943 |
Rotary drill bit |
Mar. 1, 1988 |
| 4699226 |
Interchangeable conveying spiral for rock drills |
Oct. 13, 1987 |
| 4697959 |
Method and apparatus for installing an in-ground support footing around an upstanding elongate object |
Oct. 6, 1987 |
| 4667754 |
Flexible plug for obtaining soil samples during drilling operations |
May. 26, 1987 |
| 4653245 |
Ground anchor and apparatus to set and remove same |
Mar. 31, 1987 |
| 4623025 |
Soil-displacement drill and method for manufacturing a pile |
Nov. 18, 1986 |
| 4595322 |
Spade drill bit |
Jun. 17, 1986 |
| 4593772 |
Rotary cutter for cable following apparatus |
Jun. 10, 1986 |
| 4579180 |
Drilling bit |
Apr. 1, 1986 |
| 4549616 |
Rock drill |
Oct. 29, 1985 |
| 4543019 |
Boring tool |
Sep. 24, 1985 |
| 4503920 |
Masonry bit |
Mar. 12, 1985 |
| 4496011 |
Tool for forming earth holes having fixed walls and method therefor |
Jan. 29, 1985 |
| 4494613 |
Method and apparatus for driving hollow piles into the ground |
Jan. 22, 1985 |
| 4488605 |
Extendible shank auger |
Dec. 18, 1984 |
| 4484640 |
Tool for formation of holes in macroporous compressible soils |
Nov. 27, 1984 |
| 4458769 |
Rock drill |
Jul. 10, 1984 |
| 4458765 |
Tool for forming a hole in macroporous compressible soil |
Jul. 10, 1984 |
| 4444278 |
Rotatable drilling head |
Apr. 24, 1984 |
| 4403665 |
Sonic system for propelling pilings, drills and the like into the earth employing screw device |
Sep. 13, 1983 |
| 4402371 |
Rotatable drilling head |
Sep. 6, 1983 |
| 4397363 |
Rotary drill bits and method of use |
Aug. 9, 1983 |
| 4380271 |
Earth auger with removable cutting tooth support structure |
Apr. 19, 1983 |
| 4364441 |
Hole cleaning device for augers |
Dec. 21, 1982 |
| 4363366 |
Screened hollow stem auger for use in well drilling and testing process |
Dec. 14, 1982 |
| 4352400 |
Drill bit |
Oct. 5, 1982 |
| 4314616 |
Die-cast masonry drill with leading hard insert |
Feb. 9, 1982 |
| 4285410 |
Broach for incorporation in a drill string |
Aug. 25, 1981 |
| 4282943 |
Lawn aerator |
Aug. 11, 1981 |
| 4282943 |
Lawn aerator |
Aug. 11, 1981 |
| 4278296 |
Coal mining drum with adjustable linier edge cutters |
Jul. 14, 1981 |
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