US3124182A - Circle cutter for use with powered hand drills - Google Patents

Circle cutter for use with powered hand drills Download PDF

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US3124182A
US3124182A US3124182DA US3124182A US 3124182 A US3124182 A US 3124182A US 3124182D A US3124182D A US 3124182DA US 3124182 A US3124182 A US 3124182A
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shaft
bit
center pin
circle cutter
pivot member
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
    • B27C1/007—For cutting through a work-piece with a tool having a rotational vector which is parallel to the surfaces generated by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/48—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs and rotating pairs
    • B23Q1/4804—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs and rotating pairs a single rotating pair followed perpendicularly by a single sliding pair
    • B23Q1/4809—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs and rotating pairs a single rotating pair followed perpendicularly by a single sliding pair followed perpendicularly by a single rotating pair
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/83—Tool-support with means to move Tool relative to tool-support
    • Y10T408/85—Tool-support with means to move Tool relative to tool-support to move radially
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/86—Tool-support with means to permit positioning of the Tool relative to support
    • Y10T408/88—Tool-support with means to permit positioning of the Tool relative to support including central-lead
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/96—Miscellaneous
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/306216—Randomly manipulated, work supported, or work following device
    • Y10T409/306384—Randomly manipulated, work supported, or work following device with work supported guide means
    • Y10T409/30644—Randomly manipulated, work supported, or work following device with work supported guide means to guide tool to move in arcuate path

Definitions

  • This invention relates in general to large diameter circle cutters and, more particularly, to circle cutters which are used with a conventional electric hand drill to cut large diameter circles in wood or the like.
  • a large diameter Circular hole cutter which operates with an inexpensive hand drill, would be in great demand.
  • a large diameter portable hole cutter could be used by amature or professional boat builders to cut portholes in a wooden boat during its construction.
  • such a hole cutter could readily be used to cut disks from plywood to form chair bottoms or to cut disks from heavier wood to be used to make decorative lamp bases and the like. Thousands of other uses could be found for such a portable hole cutter.
  • Another object of this invention is to provide a circle cutter which more rapidly cuts a circle of a given size in a given type of wood.
  • Still another object of this invention is to provide a circle cutter which is easily adjusted to cut circles of different diameters.
  • a further object of this invention is to provide a more rugged circle cutter which may be more inexpensively manufactured.
  • FIGURE 1 is a side view of a circle cutter according to my invention with the bottom portion of the cutting bit broken away and with the chuck of an electric drill shown in broken lines engaging the circle cutter;
  • FIGURE 2 is a longitudinal vertical section through my circle cutter and a fragment of a wooden workpiece which is being cut by the circle cutter;
  • FIGURE 3 is a top view of my circle cutter
  • FIGURE 4 is a transverse section taken on line 4-4 of FIGURE 2 showing the cross section of a bit which may be most effectively used with my circle cutter.
  • FGURES l, 2 and 3 show my circle cutter.
  • the circle cutter has a beam which is substantially square in its cross section.
  • Beam 1@ extends slidably through the pivot member 11 so that the pivot member 11 may be positioned along the length of beam 11i and locked in any desired position by the tightening of set screw 12.
  • Formed integrally with and extending downward from pivot member 11 is the center pin 15.
  • a longitudinal hexagonal channel is broached in one end of beam 10 to receive the set screw wrench 13. Wrench 13 may be readily removed from beam 1t) so that it may be used to tighten or loosen set screw 12.
  • a transverse vertical aperture is formed in the other end of beam 10 to receive the flanged bushing 14 of bronze or any other suitable bearing material.
  • Extending upward through bushing 14 is the arbor shaft 16 havmg an enlarged lower portion 17 which extends beyond the lower 3,124,182 Patented Mar. 10, 1964 end of bushing 14 to bear against the lower surface of beam 10.
  • a retaining ring 18 is slipped downward over shaft 16 and locked to shaft 16 by means of a set screw 19. The retaining ring 18 bears on the top of the flanged bushing 14 and holds the arbor shaft 16 within beam 10.
  • a cutting bit 20 extends upward into a centrally located vertical aperture formed in the bottom of the enlarged lower portion 17 of shaft 16. Bit 20 is silver soldered or otherwise fixed in shaft 16. If it is desired, another set screw (not shown) could be turned laterally into the enlarged portion 17 to contact the upper end of bit 20 and lock it in shaft 16.
  • cutting bit 20v extends considerably lower than does the end of the center pin 15. This must be a distance greater than the thickness of the wood to be out. Therefore, as shown in FIGURE l, shaft 16 may be fixed within the chuck 21 of a conventional electric hand drill. When the hand drill is activated, chuck 21 rotates shaft 16 and cutting bit 2t) which may then be used to drill a center hole 22 in a wooden workpiece 23 in which a circular cut is to be made. So that bit 20 may drill a hole perpendicular to the top surface of workpiece 23, bit 2) must be suiiciently longer than center pin 15 to allow bit 2d to completely penetrate workpiece 23 before the end of center pin 15 contacts the workpiece.
  • Bit 20 is then withdrawn from the center hole 22.
  • Set screw wrench 13 may be slipped from the end of beam 11B and used to loosen set screw 12 so that pivot member 11 may be positioned along beam 10 to locate center pin 15 a desired radial distance from the cutting bit 20.
  • Set screw 12 is then tightened and set screw wrench 13 is replaced in the end of beam 10.
  • Center pin 15 is then placed over center hole 22 and the electric drill is started to rotate bit 21B to drill a circumferential hole in workpiece 23.
  • Bit 20 completely penetrates workpiece 23 and center pin 15 seats Within the center hole 22.
  • the electric drill continues to rotate shaft 16 and bit Ztl.
  • Set screw wrench 13 may now be used as a handle so that one hand of an operator contacts set screw wrench 13 and the other hand is held on the electric drill.
  • beam 1t is rotated about center pin 15.
  • Bit 20 now functions as a side cutter and makes a circular cut in workpiece 23 as beam 10 is rotated. When bit 20 has been forced through a complete revolution about center pin 15, it will have completed a circular cut in workpiece 23.
  • cutting bit 20 has ilukes 26 formed with a left hand twist so that wood chips 24 are urged downward and thrown clear and not packed against portion 17 of shaft 16. Since it is desirable to hold a pressure on the electric drill to urge shaft 16 against workpiece 23, the lower portion 17 of shaft 16 is forced against the top of workpiece 23 and would mar it unless the outer lower edges 25 of the lower portion 17 were curved smoothly upward. Thus the upward curved edge 25 of portion 17 cannot dig into the top of a workpiece being cut even when shaft 16 is unintentionally inclined away from a position perpendicular to workpiece 23.
  • FIGURE 4 shows a particularly satisfactory configuration for a cutting bit 2t).
  • the outer sides 27 of the iiukes 26 rake backward at an angle from the cutting tips 28. This greatly assists in the side cutting action of bit 20.
  • Bit 211 should be of the same size or of slightly greater diameter than the center pin 15 so that center pin 15 will snapped o in use.
  • bit 2 is preferably about 1/8 inch in diameter although it may vary between j/16 and 1A inch in diameter.
  • a bit 2t) which approaches or is smaller than 1A6 inch in diameter is -too thin and easily may be broken or Further, at conventional rotational speeds, the cutting speed of such a small bit will be so low as to unduly prolong the cutting of a circle of a given diameter. If bit 20 is larger than 1A inch in diameter, too much material is removed in making a circular cut so that the speed of the circle cutter is too greatly reduced. Therefore, in practice, using electric drills revolving between 650 and 2000 r.p.m., a 1A; inch bit 20 is the most satisfactory.
  • a circle cutter for use with a hand powered drill comprising, in combination,

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Drilling Tools (AREA)

Description

March 10, 1964 H. slLKEN 3,124,182
CIRCLE CUTTER FOR USE WITH POWERED HAND DRILLS Filed NOV. 28, 1962 as T; :5f 22 22,/ FIG.
FIG. 3
INVENTORI HOWARD SILKEN BY ).TY
ATTORNEY United States Patent C) 3,124,122 CRCLE CUTTER FR USE WITH PWERED HANB ERHJLS Howard Silken, 309 Alien Ave., Oceanside, NX. Filed Nov. 28, 13'62, Ser. No. 240,694 4 Claims. (Cl. 145-121) This invention relates in general to large diameter circle cutters and, more particularly, to circle cutters which are used with a conventional electric hand drill to cut large diameter circles in wood or the like.
It is often very desirable to cut large diameter circles in wood with light and easily portable hand tools. Since portable electric hand drills have become exceedingly common in both professional woodworking shops and in the tool boxes of home craftsmen, a large diameter Circular hole cutter, which operates with an inexpensive hand drill, would be in great demand. For example, such a large diameter portable hole cutter could be used by amature or professional boat builders to cut portholes in a wooden boat during its construction. In addition, such a hole cutter could readily be used to cut disks from plywood to form chair bottoms or to cut disks from heavier wood to be used to make decorative lamp bases and the like. Thousands of other uses could be found for such a portable hole cutter.
It is, therefore, an object of this invention to provide a circle cutter for use with an electric drill which is a more efcient and easily used circle cutter.
Another object of this invention is to provide a circle cutter which more rapidly cuts a circle of a given size in a given type of wood.
Still another object of this invention is to provide a circle cutter which is easily adjusted to cut circles of different diameters.
A further object of this invention is to provide a more rugged circle cutter which may be more inexpensively manufactured.
Many other objects, advantages and features of invention reside in the construction, arrangement and combination of parts involved in the embodiment of my invention and its practice otherwise as will be understood from the following description and accompanying drawing wherein:
FIGURE 1 is a side view of a circle cutter according to my invention with the bottom portion of the cutting bit broken away and with the chuck of an electric drill shown in broken lines engaging the circle cutter;
FIGURE 2 is a longitudinal vertical section through my circle cutter and a fragment of a wooden workpiece which is being cut by the circle cutter;
FIGURE 3 is a top view of my circle cutter; and,
FIGURE 4 is a transverse section taken on line 4-4 of FIGURE 2 showing the cross section of a bit which may be most effectively used with my circle cutter.
Referring to the drawing in detail, FGURES l, 2 and 3 show my circle cutter. The circle cutter has a beam which is substantially square in its cross section. Beam 1@ extends slidably through the pivot member 11 so that the pivot member 11 may be positioned along the length of beam 11i and locked in any desired position by the tightening of set screw 12. Formed integrally with and extending downward from pivot member 11 is the center pin 15. A longitudinal hexagonal channel is broached in one end of beam 10 to receive the set screw wrench 13. Wrench 13 may be readily removed from beam 1t) so that it may be used to tighten or loosen set screw 12.
A transverse vertical aperture is formed in the other end of beam 10 to receive the flanged bushing 14 of bronze or any other suitable bearing material. Extending upward through bushing 14 is the arbor shaft 16 havmg an enlarged lower portion 17 which extends beyond the lower 3,124,182 Patented Mar. 10, 1964 end of bushing 14 to bear against the lower surface of beam 10. A retaining ring 18 is slipped downward over shaft 16 and locked to shaft 16 by means of a set screw 19. The retaining ring 18 bears on the top of the flanged bushing 14 and holds the arbor shaft 16 within beam 10. A cutting bit 20 extends upward into a centrally located vertical aperture formed in the bottom of the enlarged lower portion 17 of shaft 16. Bit 20 is silver soldered or otherwise fixed in shaft 16. If it is desired, another set screw (not shown) could be turned laterally into the enlarged portion 17 to contact the upper end of bit 20 and lock it in shaft 16.
This invention is used in the following manner. As shown in FIGURE 2, cutting bit 20v extends considerably lower than does the end of the center pin 15. This must be a distance greater than the thickness of the wood to be out. Therefore, as shown in FIGURE l, shaft 16 may be fixed within the chuck 21 of a conventional electric hand drill. When the hand drill is activated, chuck 21 rotates shaft 16 and cutting bit 2t) which may then be used to drill a center hole 22 in a wooden workpiece 23 in which a circular cut is to be made. So that bit 20 may drill a hole perpendicular to the top surface of workpiece 23, bit 2) must be suiiciently longer than center pin 15 to allow bit 2d to completely penetrate workpiece 23 before the end of center pin 15 contacts the workpiece. Bit 20 is then withdrawn from the center hole 22. Set screw wrench 13 may be slipped from the end of beam 11B and used to loosen set screw 12 so that pivot member 11 may be positioned along beam 10 to locate center pin 15 a desired radial distance from the cutting bit 20. Set screw 12 is then tightened and set screw wrench 13 is replaced in the end of beam 10.
Center pin 15 is then placed over center hole 22 and the electric drill is started to rotate bit 21B to drill a circumferential hole in workpiece 23. Bit 20 completely penetrates workpiece 23 and center pin 15 seats Within the center hole 22. The electric drill continues to rotate shaft 16 and bit Ztl. Set screw wrench 13 may now be used as a handle so that one hand of an operator contacts set screw wrench 13 and the other hand is held on the electric drill. By means of the drill and the set screw wrench 13, beam 1t) is rotated about center pin 15. Bit 20 now functions as a side cutter and makes a circular cut in workpiece 23 as beam 10 is rotated. When bit 20 has been forced through a complete revolution about center pin 15, it will have completed a circular cut in workpiece 23.
If bit 20 has a right hand twist, chips of wood will be drawn upward and blocked by the lower portion 17 of shaft 16. These chips will be packed in the circular cut being made in the workpiece 23 and may slow down the rate of cutting and they will prevent the free and easy removal of the disk cut from workpiece 23. Therefore, as shown in FIGURE 2, cutting bit 20 has ilukes 26 formed with a left hand twist so that wood chips 24 are urged downward and thrown clear and not packed against portion 17 of shaft 16. Since it is desirable to hold a pressure on the electric drill to urge shaft 16 against workpiece 23, the lower portion 17 of shaft 16 is forced against the top of workpiece 23 and would mar it unless the outer lower edges 25 of the lower portion 17 were curved smoothly upward. Thus the upward curved edge 25 of portion 17 cannot dig into the top of a workpiece being cut even when shaft 16 is unintentionally inclined away from a position perpendicular to workpiece 23.
FIGURE 4 shows a particularly satisfactory configuration for a cutting bit 2t). The outer sides 27 of the iiukes 26 rake backward at an angle from the cutting tips 28. This greatly assists in the side cutting action of bit 20.
Bit 211 should be of the same size or of slightly greater diameter than the center pin 15 so that center pin 15 will snapped o in use.
easily iit snugly within a center hole 22 drilled by bit 20. Furthermore, bit 2) is preferably about 1/8 inch in diameter although it may vary between j/16 and 1A inch in diameter. A bit 2t) which approaches or is smaller than 1A6 inch in diameter is -too thin and easily may be broken or Further, at conventional rotational speeds, the cutting speed of such a small bit will be so low as to unduly prolong the cutting of a circle of a given diameter. If bit 20 is larger than 1A inch in diameter, too much material is removed in making a circular cut so that the speed of the circle cutter is too greatly reduced. Therefore, in practice, using electric drills revolving between 650 and 2000 r.p.m., a 1A; inch bit 20 is the most satisfactory.
While I have disclosed my invention in the best form known to me, it will nevertheless be understood that this is purely exemplary and that modications in the construction, arrangement and combination of parts may be made without departing from the spirit of the invention except as it may be more limited in the appended claims wherein I claim:
1. A circle cutter for use with a hand powered drill comprising, in combination,
(a) a beam,
(b) a pivot member slidably disposed on said beam,
(c) locking means fixing said pivot member to said beam,
(d) a center pin extending downward from said pivot member,
(e) an arbor shaft extending rotatably and vertically i through one end of said beam, the upper end of said arbor shaft being engageable by a power drill, said arbor shaft having an enlarged lower portion below said beam,
(f) a collar disposed about said shaft above said beam, said collar having means fixing said collar to said shaft to secure said shaft within said beam, and
(g) a cutting bit of substantially the diameter of said center pin extending downward from said arbor shaft below said center pin.
2. The combination according to claim 1 wherein said enlarged lower portion of said arbor shaft is cylindrical and has a smoothly upward curving lower edge.
3. The combination according to claim 2 wherein said pivot member is a vertical cylinder and said beam passes transversely through said pivot member, Said pivot member and said cylindrical lower portion of said arbor shaft extending an equal distance below said beam.
4. 'T he combination according to claim 3 wherein said cutting bit has flukes with a left hand twist.
References Cited in the le of this patent UNITED STATES PATENTS 982,740 Mullinnix Jan. 24, 1911 2,623,552 Compton et al. Dec. 30, 1952 2,693,134 Mole Nov. 2, 1954 2,986,814 Brinkman June 6, 1961

Claims (1)

1. A CIRCLE CUTTER FOR USE WITH A HAND POWERED DRILL COMPRISING, IN COMBINATION, (A) A BEAM, (B) A PIVOT MEMBER SLIDABLY DISPOSED ON SAID BEAM, (C) LOCKING MEANS FIXING SAID PIVOT MEMBER TO SAID BEAM, (D) A CENTER PIN EXTENDING DOWNWARD FROM SAID PIVOT MEMBER, (E) AN ARBOR SHAFT EXTENDING ROTATABLY AND VERTICALLY THROUGH ONE END OF SAID BEAM, THE UPPER END OF SAID ARBOR SHAFT BEING ENGAGEABLE BY A POWER DRILL, SAID ARBOR SHAFT HAVING AN ENLARGED LOWER PORTION BELOW SAID BEAM, (F) A COLLAR DISPOSED ABOUT SAID SHAFT ABOVE SAID BEAM, SAID COLLAR HAVING MEANS FIXING SAID COLLAR TO SAID SHAFT TO SECURE SAID SHAFT WITHIN SAID BEAM, AND (G) A CUTTING BIT OF SUBSTANTIALLY THE DIAMETER OF SAID CENTER PIN EXTENDING DOWNWARD FROM SAID ARBOR SHAFT BELOW SAID CENTER PIN.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276326A (en) * 1964-12-21 1966-10-04 Herbert E Gibbons Circular hole cutter
FR2439651A1 (en) * 1978-10-27 1980-05-23 Orblin Charles Portable motor driven cutting tool for e.g. concrete - comprises motor on which long bridge piece is mounted to support rotating cutter
US4397207A (en) * 1980-02-25 1983-08-09 Dalton Isaac Sheet metal cutting device for arcs and circles
US5895183A (en) * 1997-03-25 1999-04-20 Mcdaniel; Jamie Circular hole cutter
US20080092703A1 (en) * 2001-06-28 2008-04-24 Shaw Jack B Apparatus And Method For Cutting Using A Liquid Fluid Jet
US10105805B2 (en) 2013-11-05 2018-10-23 Tanjen Invent As Cutting tool and method for cutting openings in a body

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US982740A (en) * 1908-11-30 1911-01-24 John C Mullinnix Drill-press.
US2623552A (en) * 1949-12-30 1952-12-30 Sherman W Compton Side cutting rotary tool
US2693134A (en) * 1950-12-18 1954-11-02 Robert F Mole Hole and slot cutter
US2986814A (en) * 1958-12-11 1961-06-06 Brinkman Fred Robert Gasket cutting tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US982740A (en) * 1908-11-30 1911-01-24 John C Mullinnix Drill-press.
US2623552A (en) * 1949-12-30 1952-12-30 Sherman W Compton Side cutting rotary tool
US2693134A (en) * 1950-12-18 1954-11-02 Robert F Mole Hole and slot cutter
US2986814A (en) * 1958-12-11 1961-06-06 Brinkman Fred Robert Gasket cutting tool

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3276326A (en) * 1964-12-21 1966-10-04 Herbert E Gibbons Circular hole cutter
FR2439651A1 (en) * 1978-10-27 1980-05-23 Orblin Charles Portable motor driven cutting tool for e.g. concrete - comprises motor on which long bridge piece is mounted to support rotating cutter
US4397207A (en) * 1980-02-25 1983-08-09 Dalton Isaac Sheet metal cutting device for arcs and circles
US5895183A (en) * 1997-03-25 1999-04-20 Mcdaniel; Jamie Circular hole cutter
US20080092703A1 (en) * 2001-06-28 2008-04-24 Shaw Jack B Apparatus And Method For Cutting Using A Liquid Fluid Jet
US7806750B2 (en) * 2001-06-28 2010-10-05 Shaw Jack B Apparatus and method for cutting using a liquid fluid jet
US10105805B2 (en) 2013-11-05 2018-10-23 Tanjen Invent As Cutting tool and method for cutting openings in a body

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