US 2003/0196834 A1 · AUGER TOOL FOR BORING

Abstract

A tool for boring has a first shaft for drivingly linking at a first end to a portable rotatable machine. At a second end, the tool has a fastener to which a modular auger section can be drivingly linked. A second shaft of the tool has an outer surface to which a radially inwardly extending edge of a helical flight is attached. A cylindrical collar is attached to a radially outwardly extending peripheral edge of the flight and is mounted radially outwardly of the second shaft. An insulator interposed between the shafts electrically insulates the shafts from each other. The shafts can be unlinked through a shear pin breaking in response to a predetermined amount of relative torque to the shafts.

Drawings

Drawings are temporarily unavailable. Open the PDF at USPTO

Drawings

Claims28

Dependent claims

A tool for boring comprising:

a) a first shaft for drivingly linking at a first end to a portable rotatable machine, said first shaft having an axis defining a longitudinal axis of rotation;
b) a second shaft drivingly linked to said first shaft, said second shaft having a fastener to which a modular auger section can be drivingly linked, and an outer surface to which a radially inwardly extending edge of a helical flight is attached;
c) a cylindrical collar having an outer surface and an inner surface, said inner surface mounted to a radially outwardly extending peripheral edge of said helical flight, and said collar mounted radially outwardly of said second shaft;
d) means for electrically insulating said first shaft from said second shaft interposed between the first and second shaft;
and
e) mechanical release means drivingly linked to said shafts for rotatably unlinking said shafts upon the application of a predetermined amount of relative torque to said shafts.

3 more elements

A tool for boring comprising:

a) a first shaft for drivingly linking at a first end to a portable rotatable machine, said first shaft having an axis defining a longitudinal axis of rotation;
b) a second shaft drivingly linked to said first shaft, said second shaft having a fastener to which an auger tip section is drivingly linked, and an outer surface to which a radially inwardly extending edge of a helical flight is attached;
c) a cylindrical collar having an outer surface and an inner surface, said inner surface mounted to a radially outwardly extending peripheral edge of said helical flight, and said collar mounted radially outwardly of said second shaft;
d) means for electrically insulating said first shaft from said second shaft interposed between the first and second shaft;
and
e) mechanical release means drivingly linked to said shafts for rotatably unlinking said shafts upon the application of a predetermined amount of relative torque to said shafts.

3 more elements

A tool for boring comprising:

a) a first shaft for drivingly linking at a first end to a portable rotatable machine, said first shaft having an axis defining a longitudinal axis of rotation;
b) a second shaft drivingly linked to said first shaft, said second shaft having a fastener to which an auger tip section is drivingly linked, and an outer surface to which a radially inwardly extending edge of a helical flight is attached;
c) a cylindrical collar having an outer surface and an inner surface, said inner surface mounted to a radially outwardly extending peripheral edge of said helical flight, and said collar mounted radially outwardly of said second shaft;
d) an electrical insulator interposed between the first shaft and the second shaft, insulating said first shaft from said second shaft;
and
e) a shear pin drivingly linked to said shafts for rotatably unlinking said shafts upon the application of a predetermined amount of relative torque to said shafts.

3 more elements

A tool for boring comprising:

a) a first shaft having a first end and a second end, said first end being drivingly linking to a portable rotatable machine, said first shaft having an axis defining a longitudinal axis of rotation;
b) a second shaft drivingly linked to said first shaft, said second shaft having a first end and a second end, a fastener to which a modular auger section can be drivingly linked, and an outer surface to which a radially inwardly extending edge of a helical flight is mounted;
c) a cylindrical collar having an outer surface and an inner surface, said inner surface mounted to a radially outwardly extending peripheral edge of said helical flight, said collar mounted radially outwardly of said second end of said second shaft and extending substantially parallel to said longitudinal axis of rotation;
d) an electrical insulator interposed between the first shaft and the second shaft for insulating said first shaft from said second shaft, said insulator having
i) an electrically insulating body having an outer surface on which a longitudinal key is formed, said key matingly engaged in a longitudinal slot formed on an inner surface of a cylindrical housing in surrounding contact with said outer surface of said insulating body;
ii) a cavity formed centrally and longitudinally into said insulator, said cavity being occupied by the first end of said second shaft;
e) a cylindrical metal housing having:
i) an outer surface,
ii) an inner surface, said inner surface being in surrounding contact with said outer surface of said insulator and having a longitudinal slot to which said key of said insulator is matingly engaged,
iii) a pair of circular apertures aligned oppositely to each other and diametrically to said housing, each of said apertures having a diameter,
iv) a top end having a metal plug attached thereto, said plug having a central aperture in which said second end of said first shaft is matingly attached,
v) a bottom end having a cap attached thereto, said cap having a hole that is larger than the diameter of said first end of said second shaft extending through said hole,
f) a transverse passage formed through said insulating body and said second shaft, said passage having:
i) a width that is substantially smaller than a pair of aligned transverse apertures formed through said cylindrical housing;
ii) a force-bearing pin mounted in said passage for prohibiting longitudinal movement of said insulating body relative to said second shaft;
and,
g) a shear pin extending through said housing and said plug, said shear pin drivingly linking said shafts for rotatably unlinking said shafts upon the application of a predetermined amount of relative torque.

14 more elements

Dependencies are inferred from the claim text.

Description5,567 words

Summary1,394 words

#(Not Applicable)

Detailed description4,173 words

#In describing the preferred embodiment of the invention, which is illustrated in the drawings, specific terminology will be resorted to for the sake of clarity. However, it is not intended that the invention be limited to the specific term so selected, and it is to be understood that each specific term includes all technical equivalents that operate in a similar manner to accomplish a similar purpose. For example, the word connected or term similar thereto are often used. They are not limited to direct connection, but include connection through other elements where such connection is recognized as being equivalent by those skilled in the art.

#As illustrated in FIGS. 1-3, the invention is an auger tool 10 for boring into soil. The preferred embodiment of the tool 10 has a first shaft 12. The first shaft 12 is preferably a hexagonal rod having a first end 14, a second end 16, and a longitudinal axis that defines an axis of rotation extended through the tool 10, about which the tool 10 can be rotated in a hole-forming operation. The first end 14 is adapted to be drivingly linked to a portable rotatable machine, such as an industrial drill 9, the chuck of which is shown with phantom lines in FIG. 1. The tool 10 is made of steel or similarly rigid material commonly used for making heavy construction implements, unless otherwise noted.

#A second shaft 18 is a preferably hexagonal rod that is drivingly linked to the first shaft 12. The second shaft 18 has an upper end 24, a lower end 26, and an outer surface 22. The lower end 26 of the preferred second shaft 18 has a female fastener 20 with an insertion slot 21. The fastener 20 is either integral with the second shaft 18 or a separate piece into which the fastener 20 is formed. A radially inwardly extending edge 30 of a helical flight 28 is attached to the outer surface 22, such as by welding.

Facts

Application

10/126,313Filed 19 Apr 2002

Published

23 Oct 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

E21B 10/44
Drill bits: bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
Y10T 408/907
Tool or Tool with support: including detailed shank
E21B
Earth or rock drilling
Y10T
Technical subjects covered by former us classification

Auger tool for boring

Life of this patent

Auger tool for boring

Life of this patent

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims28

Description5,567 words

Drawings

Classification4 codes

Description5,567 words