# US 2014/0190102 A1 · Hole boring tool > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190102 A1 - Document ID: US20140190102A1 - Status: Published application - Kind: A1 - Application number: 13/737,610 - Filed: 2013-01-09 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Assignees: Pesticide Delivery Systems, Inc. - Applicants: Pesticide Delivery Systems, Inc. - Inventors: Robert W. Haynes - Web page: https://patentgrep.com/patent/US20140190102A1 ## CPC - E02D 27/32: Foundations for special purposes {(for paving of roads E01C3/00)} - E21B 10/32: with expansible cutting tools - E02D: FOUNDATIONS; EXCAVATIONS; EMBANKMENTS (specially adapted for hydraulic engineering E02B); UNDERGROUND OR UNDERWATER STRUCTURES {(tunnels, tunnelling, mining E21)} - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A boring tool for digging holes having a vertical shaft of a first diameter extending from the soil surface to a suitable subsurface distance, and a void of a second diameter, larger than that of the first diameter, at the bottom, subsurface distance. ## Claims ### Claim 1 A hole boring tool having at least one laterally extendable cutting blade at a lower portion thereof, structured and arranged to bore a hole with a larger diameter void at the bottom than at the top of the tool. ### Claim 2 (depends on 1) The hole boring tool of claim 1, wherein extension of the cutting blade is controllable from the top of the tool. ### Claim 3 (depends on 1) The hole boring tool of claim 1, wherein the cutting blade is retractable within the diameter of the tool. ### Claim 4 (depends on 1) The hole boring tool of claim 1, wherein the cutting blade comprises metal, metal carbide or diamond. ### Claim 5 (depends on 1) The hole boring tool of claim 1, wherein the extended cutting blade is disposed at an angle to the axis of the hole. ### Claim 6 (depends on 1) The hole boring tool of claim 1, comprising at least two cutting blades disposed on opposite sides of the lower portion of said tool. ### Claim 7 (depends on 1) The hole boring tool of claim 1, wherein the lower portion of said tool comprises an inverted hollow cone and said cutting blade can be retracted within a diameter equal to that of an upper terminus of said cone or laterally extended from said diameter. ### Claim 8 (depends on 1) The hole boring tool of claim 1, wherein said cutting blade is laterally extendable to varying distances from a rotational axis of said tool. ### Claim 9 A hole boring tool having an axis of rotation, comprising: an inverted hollow cone having inner and outer surfaces, an axial tip located at a lower, soil penetrating portion of the tool, and an upper terminus; a drive frame attached to said upper terminus of said inverted hollow cone, comprising: a lower portion having two vertical side plates with upper and lower ends, the lower ends of said vertical side plates connected to opposing sides of said cone upper terminus, a horizontal plate connecting the upper ends of said side plates, with an axial hole in said horizontal plate, and a hollow outer shaft having upper and lower ends and an inner diameter, the lower end of said hollow outer shaft being connected to the upper surface of said horizontal plate, and said inner diameter communicating with said axial hole in said horizontal plate; an axial inner shaft having upper and lower ends, the lower end pivotally and centrally disposed within the tip of the inner surface of said cone, extending axially through said drive frame and hollow outer shaft, and having upper and lower pivot arms attached to a lower portion of said inner shaft within said drive frame; at least one laterally extendable blade assembly having a pivot end and a cutting end, the pivot end pivotally attached between said upper and lower pivot arms; and an indexing assembly, comprising: a pilot plate having upper and lower surfaces, an indexing plate having upper and lower surfaces, disposed axially adjacent to said pilot plate, and locking means which coact with said pilot plate and said indexing plate to control relative axial rotation between them, wherein the lower surface of one of said plates is connected to the upper end of said inner shaft, and the lower surface of the other of said plates is connected to the upper end of said hollow outer shaft such that the inner diameter thereof communicates with an axial hole in the plate connected thereto, said plates being rotatably moveable relative to each other on the axis of rotation. ### Claim 10 (depends on 9) The hole boring tool of claim 9, wherein the locking means comprises: a plurality of indexing holes disposed on a surface of said indexing plate, radially outward at a distance from the axis of rotation and within a selected angle relative to the axis, a pilot hole disposed on a surface of said pilot plate adjacent to said index plate, radially outward at said same distance from the axis of rotation on said pilot plate, and a moveable pilot pin configured to extend between said pilot hole and into said indexing holes. ### Claim 11 (depends on 9) The hole boring tool of claim 9, wherein the locking means comprises a pilot tooth assembly on said pilot plate, said pilot tooth assembly having a pilot tooth disposed at one end thereof and engaged with a series of indexing teeth disposed on a the adjacent surface of said indexing plate, said locking means having a control on said pilot plate to permit locking said pilot plate and said indexing plate against relative rotation, and to permit disengagement of said pilot tooth from said indexing teeth, to allow selective rotation of said pilot plate relative to said indexing plate. ### Claim 12 (depends on 9) The hole boring tool of claim 9, further comprising digging, scraping or boring apparatuses disposed on the outer surface of said inverted hollow cone. ### Claim 13 (depends on 9) The hole boring tool of claim 9, further comprising at least one vertically disposed brace between the upper terminus of said inverted cone and said horizontal plate of said drive frame, disposed opposite the blade assembly from said vertical side plates. ### Claim 14 (depends on 9) The hole boring tool of claim 9, wherein said indexing plate is a disk. ### Claim 15 (depends on 9) The hole boring tool of claim 9, wherein said pilot plate is a disk. ### Claim 16 (depends on 9) The hole boring tool of claim 9, wherein said inner shaft is hollow. ### Claim 17 (depends on 9) The hole boring tool of claim 9, further comprising a second laterally extendable blade assembly attached between said upper and lower pivot arms, wherein said pivot arms extend from either side of said inner shaft. ### Claim 18 (depends on 9) The hole boring tool of claim 9, wherein said indexing plate is connected to said hollow outer shaft, and the pilot plate is connected to said axial inner shaft and disposed above the indexing plate. ### Claim 19 (depends on 10) The hole boring tool of claim 10, wherein when said pilot pin is disposed through said pilot hole in said pilot plate and into a first of said indexing holes of said indexing plate, the cutting end of said blade assembly is contained substantially within said drive frame and between a vertical side plate and a vertical brace disposed between the upper terminus of said inverted cone and said horizontal plate of said drive frame. ### Claim 20 (depends on 9) The hole boring tool of claim 9, wherein upon rotation of said pilot plate relative to said indexing plate, the blade assembly pivots so as to move the cutting end of said blade assembly laterally and outside of said drive frame. ### Claim 21 (depends on 10) The hole boring tool of claim 10, wherein the indexing holes in said indexing plate are configured such that rotating said pilot plate relative to said indexing plate and placing said pilot pin through said pilot hole in said pilot plate and sequentially into said radially disposed indexing holes acts to pivot the blade assembly and sequentially force the cutting end of said blade assembly further outside of said drive frame. ### Claim 22 A method for boring a hole in soil, comprising placing a hole boring tool having an axis of rotation onto a surface of the soil, applying a vertical down force on said tool and rotating said tool while applying said down force to force said tool into the soil, said hole boring tool comprising at least one laterally extendable cutting blade at a lower portion thereof, structured and arranged to bore a hole with a larger diameter void at the bottom than at the top of the tool. ### Claim 23 (depends on 22) The method of claim 22, wherein said hole boring tool further comprises: an inverted hollow cone having inner and outer surfaces, an axial tip located at a lower, soil penetrating portion of the tool, and an upper terminus; a drive frame attached to said upper terminus of said inverted hollow cone, comprising: a lower portion having two vertical side plates with upper and lower ends, the lower ends of said vertical side plates connected to opposing sides of said cone upper terminus, a horizontal plate connecting the upper ends of said side plates, with an axial hole in said horizontal plate, and a hollow outer shaft having upper and lower ends and an inner diameter, the lower end of said hollow outer shaft being connected to the upper surface of said horizontal plate, and said inner diameter communicating with said axial hole in said horizontal plate; an axial inner shaft having upper and lower ends, the lower end pivotally and centrally disposed within the tip of the inner surface of said cone, extending axially through said drive frame and hollow outer shaft, and having upper and lower pivot arms attached to a lower portion of said inner shaft within said drive frame; said at least one laterally extendable blade assembly having a pivot end and a cutting end, the pivot end pivotally attached between said upper and lower pivot arms; and an indexing assembly, comprising: a pilot plate having upper and lower surfaces, an indexing plate having upper and lower surfaces, disposed axially adjacent to said pilot plate, and locking means which coact with said pilot plate and said indexing plate to control relative axial rotation between them, wherein the lower surface of one of said plates is connected to the upper end of said inner shaft, and the lower surface of the other of said plates is connected to the upper end of said hollow outer shaft such that the inner diameter thereof communicates with an axial hole in the plate connected thereto, said plates being rotatably moveable relative to each other on the axis of rotation, thereby boring a hole into the soil having a first diameter corresponding to that of the upper terminus of said cone. ### Claim 24 (depends on 23) The method of claim 23, wherein during said boring process said pilot plate and said indexing plate are rotationally aligned such that the cutting end of said blade assembly is maintained substantially within said drive frame. ### Claim 25 (depends on 24) The method of claim 24, further comprising reaching a predetermined depth within said soil, disengaging the locking means to permit said relative rotation, rotating the pilot plate relative to said indexing plate so as to force the cutting end of the blade assembly laterally outward from said drive frame, engaging said locking means so as to lock the pilot plate and indexing plate against said relative rotation, and rotating the digging apparatus such that the cutting end of said blade assembly increases the subsurface diameter of said hole in the soil, relative to said first diameter. ### Claim 26 (depends on 25) The method of claim 25, further comprising disengaging the locking means to permit further relative rotation between the pilot plate and the indexing plate, rotating the pilot plate relative to said indexing plate so as to further pivot and force the cutting end of said blade assembly laterally further outside the drive frame, engaging said locking means, and rotating the hole digging apparatus to form successively larger subsurface hole diameters. ### Claim 27 (depends on 23) The method of claim 23, further comprising withdrawing the hole boring tool during the boring process and removing soil deposited within said inverted hollow cone. ### Claim 28 (depends on 23) The method of claim 23, wherein the hole boring tool further comprises a second laterally extendable blade assembly attached between said upper and lower pivot arms, wherein said pivot arms extend from either side of said inner shaft. ### Claim 29 A construction footing comprising a bore hole in soil of a first diameter extending from a surface of the soil to a predetermined depth, and a subsurface void of a second diameter, larger than said first diameter, below said bore hole and filled with a suitable footing composition. ### Claim 30 (depends on 29) The construction footing of claim 29, wherein the bore hole is not back-filled to said first diameter.