US3323507A - Concrete cutting machine - Google Patents

Concrete cutting machine Download PDF

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Publication number
US3323507A
US3323507A US411462A US41146264A US3323507A US 3323507 A US3323507 A US 3323507A US 411462 A US411462 A US 411462A US 41146264 A US41146264 A US 41146264A US 3323507 A US3323507 A US 3323507A
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United States
Prior art keywords
carriage
saw
track
unit
bed plate
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US411462A
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English (en)
Inventor
Schuman Albert
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Individual
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Individual
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Filing date
Publication date
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Priority to US411462A priority Critical patent/US3323507A/en
Priority to GB4735065A priority patent/GB1053010A/en
Priority to DE1427765A priority patent/DE1427765C3/de
Priority to CH1577265A priority patent/CH429550A/de
Application granted granted Critical
Publication of US3323507A publication Critical patent/US3323507A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B23Q9/00—Arrangements for supporting or guiding portable metal-working machines or apparatus
    • B23Q9/0014—Portable machines provided with or cooperating with guide means supported directly by the workpiece during action
    • 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
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
    • B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
    • B23Q5/385—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously using a gear and rack mechanism or a friction wheel co-operating with a rail
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/045—Sawing grooves in walls; sawing stones from rocks; sawing machines movable on the stones to be cut

Definitions

  • the frame cannot be excessively heavy. This means that the frame must be relatively short. Since the track defined by the frames of existing machines is no longer than the frame, the cut must be made in several steps if the total length of the cut is longer than the permissible movement of the carriage along the frame. This means that the frame must be moved bodily after each segment of the cut has been made. Accordingly, the frame must be removed from the wall and reaflixed to the wall in a new location. Since a disc saw is used, great care must be taken that the frame is so located in its new position that the saw enters the end of the cut just previously made. It is seen, therefore, that existing devices are also time consuming to use, and a skilled operator is required if proper repositioning of the frame is to be obtained.
  • This invention provides an improved portable concrete saw for use on concrete or masonry walls and the like.
  • the improved saw is characterized by the feature that the track along which it moves is of indeterminate length. Once the track is located, the cut is made in one continuous operation.
  • the track is in segments which are so constructed to enable rapid, yet accurate, track erection. The saw moves along the track from track segment to track segment under its own power.
  • this invention provides apparatus for sawing substantially planar concrete structures.
  • the apparatus includes a guide track which is provided in units adapted to be engaged in end to end relation. Each track unit is adapted for direct connection to the structure to be sawed.
  • a carriage is provided and is equipped with means for mounting it to the guide track for movement along the track. Further, means are operatively engaged between the carriage and the track for moving the carriage along a given track unit and from that unit to the next.
  • a concrete saw is coupled to saw rotating means mounted to the carriage.
  • FIG. 1 is a perspective view of a concrete saw according to this invention showing the saw in operation;
  • FIG. 2 is a front elevation view of a second embodi- "ice ment of a concrete saw according to this invention with certain parts removed for the sake of clarity of illustration;
  • FIG. 3 is an end view of the saw shown in FIG. 2;
  • FIG. 4 is a cross-sectional elevation view of the saw drive motor, gear box and the saw mounting
  • FIG. 5 is an elevation view showing a plurality of track units according to this invention mounted to a wall or the like;
  • FIG. 6 is a semi-schematic diagram of the pneumatic system for a concrete saw according to this invention.
  • FIG. 7 is a cross-sectional elevation view of the carriage rollers and a rail element.
  • a concrete wall saw 10 as shown in FIG. 1, includes a track 11 secured to a concrete wall 12, or the like.
  • a carriage 13 is engaged with the track for guided movement along the track.
  • a movable frame 14 is mounted to the carriage for reciprocation toward and away from the wall along a. plurality of guide posts 15.
  • a circular concrete saw 16, preferably a diamond toothed disc saw, is rotated by a motor (not shown in FIG. 1) secured to frame 14.
  • a screw 17 is connected between the frame and a tieplate 18 secured to the end of posts 15 opposite from carriage 135. Rotation of the screw by operation of a crank 19 causes the frame to move along the posts.
  • the screw and crank provide a mechanism for moving the saw 16 and out of engage ment with wall 12.
  • FIGS. 2 and 3 illustrate a concrete wall saw 24 Saw 24 ⁇ includes a rectangular carriage 21 fitted at each corner with a roller mounting block 22.
  • Each roller mounting block mounts three rollers 23, 24, 25 which engage rail elements 50 and 51 secured to each track unit 11.
  • the track units, the rollers and the roller mountings will be described in greater d tail hereinafter.
  • a small pneumatic motor 26 is mounted to the carriage adjacent one end thereof for driving the carriage along the track.
  • a pair of parallel cylindrical guide posts 27 are mounted at spaced locations to carriage 21. At their ends opposite from the carriage, the guide posts are connected together by a tieplate 28.
  • a movable saw frame 29 is mounted to posts 27 for movement toward and away from carriage 21. To this end, each guide post is circumferentially engaged "by a pair of journal blocks 30 secured at spaced locations to opposite ends of rame 29.
  • a jackscrew 31 is connected between frame 29 and tieplate 28.
  • the jackscrew includes an externally threaded screw 32 rotatably mounted at one end in a block 33 connected to frame 29 between posts 27.
  • An internally threaded sleeve 33 engages the other end of screw 32.
  • Sleeve 33 is rotatably mounted in a suitable bearing 34 connected to the tieplate.
  • the end of jackscrew 31 opposite from the saw mounting frame is connected to a crank 35.
  • a saw drive motor 37 is mounted to frame 29 substantially centrally of journal blocks 30 and extends away from the frame.
  • the motor is connected to a gearbox 38 which, as shown in FIG. 4, has an output shaft 39 to which is keyed a clamp assembly 40 for a disc saw.
  • a pair of stays or braces 42 are connected from between the opposite ends of tieplate 28 adjacent saw clamp it? to the corners of the carriage opposite from saw clamp 40.
  • track units 11 are substantially identical to one another.
  • Each track unit includes an elongated rectangular 'bedplate 45.
  • a plurality of substantially identical rectangular lightning holes 46 are provided in the track units.
  • One of the lightning holes 46A having a length half as long as the other lightning holes, is disposed to open to one end 47 of each track unit.
  • the other end 43 of each tack unit defines a lightning hole 46B which has a length equal to one-half the length of holes 36 and which opens to end 48.
  • An insert member 49 is mounted in lightning hole 46B so that when one track unit, say track unit 11A (see FIG. 5), is engaged with another track unit, say track unit 11B, the insert member is snugly engaged in lightning hole 46A of track unit 113.
  • Insert member 49 and the recess defined by lightning hole 46A provides a tongue and groove mechanism for obtaining course alignment of track units 11A and MB.
  • a pair of linear rail elements 50 and 51 preferably provided in the form of steel flat bars, are secured to each track unit along the entire extent of the opposite elongated edges of each bedplate. The ends of the rail elements are coextensive with the ends of the bedplates.
  • each rail member has upper and lower surfaces 52 and 53, respectively, and an outer surface 54. Rollers 23, 24, and 25 are engaged with these surfaces, respectively.
  • the carriage when the carriage is engage-d with a given track unit, the carriage is movably mounted to the track unit so that the carriage has only one degree of freedom of movement relative to the track unit. This single degree of freedom of movement is along the track unit.
  • the carriage is constrained from movement in all other directions since rollers 23 and 24 engage the upper and lower surfaces of the rail elements and rollers 25 engage the outer surfaces of the rail elements.
  • rollers 23, 24 and 25 are mounted to cylindrical axles 56.
  • the axles for rollers 24, however, are engaged in eccentrically bored sleeves 57 which are engaged in holes 58 formed through the corresponding portions of each roller mounting block 22.
  • rollers 25 are similarly mounted to the roller mounting blocks so as to prevent lateral movement of the carriage relative to the track.
  • a rack 59 (see FIG. 5) is mounted to each track unit and extends along the entire length of the track unit.
  • each rack is mounted to the upper surface of rail member 51.
  • the rack is engageable with a pinion gear 69 mounted to the output shaft (not shown) of carriage drive motor 26. Accordingly, when the carriage is engaged with a track unit, operation of motor 26 causes pinion 60 to rotate and thereby drive the carriage along the track unit.
  • the racks are so arranged that the rack on one track unit continues the rack on the track unit abutted therewith. Accordingly, it is seen that the carriage can move smoothly from one track unit to the next in response to operation of the carriage drive motor.
  • Each track unit is independently secured to wall 12 which is to be cut by operation of saw or 20.
  • a plurality of bolting holes 64 is provided through each track unit bedplate.
  • the ends of holes 64 which open toward the rail members are countersunk as shown in FIG. 7.
  • the bedplates are bolted directly to the Wall by passing suitable bolts through holes 64 into holes drilled in the wall.
  • a tapped hole 65 is provided adjacent each bolting hole 64.
  • An externally threaded stud 66 is engaged in each of holes 65. As the bedplate is secured to the wall, studs 66 are adjusted to abut against the wall in such manner that the bedplate lies in a predetermined plane parallel to the generally planar surface of the wall.
  • FIG. 4 shows a gearbox 38 disposed between output shaft 67 of saw drive motor 37 and saw clamp assembly 40 to enable the apparatus described above to be used with concrete saws of various diameters. Regardless of the diameter of the saw used to cut a concrete structure, the operational peripheral speed of the saw falls within a generally predetermined range. Accordingly, motor 37 is selected so that motor output shaft 67 rotates (When air is supplied to the motor at the rated motor air pressure) at a rate greater than the rotational rate of the smallest saw to be used with the apparatus.
  • the saw motor output shaft 67 defines a pinion gear which is engaged with a reduction gear 68 secured to gearbox output shaft 39.
  • the gearbox output shaft is rotatably mounted in a gearbox housing 70 by suitable ball bearings 69, or the like.
  • a conventional saw clamp assembly 40 is secured to the gearbox output shaft.
  • gearbox 38 is interchanged with another similar gearbox defining a different gear ratio when the diameter of the saw engaged in clamp assembly 40 is changed. It is within the scope of this invention, however, that a single gearbox providing a variable reduction ratio may be used.
  • guard 71 Normally the saw engaged in clamp 40 is disposed in a guard 71, as shown in FIG. 1. For the purposes of clarity of illustration, however, the guard has been deleted from FIGS. 2 and 3.
  • a guard bracket 72 is secured to the upper ones of guide post journal blocks 30 for receiving a guard, however.
  • Pneumatic motors 26 and 37 have been described as components of the foregoing apparatus. It is within the scope of this invention, however, that electric motors may be used if desired.
  • a pneumatic pressure regulator 75 equipped with a pressure gauge 76, is mounted on a bracket 77 which, in turn, is secured to tieplate 28.
  • the pressure regulator has an inlet fitting 78 (see FIG. 3).
  • a pneumatic reversing valve 79 operated by a handle 80 is secured to bracket 77 below the regulator.
  • air is supplied to saw motor 37 through a suitable high pressure air conduit 81 connected directly to saw motor 37.
  • a bypass duct 82 is connected to the duct between duct 81 and inlet fitting 78 of the pressure regulator.
  • the pressure regulator is in turn connected to the reversing valve 79.
  • Suitable pneumatic ducts 83 and 84 are connected between the reversing valve and motor 26.
  • Operation of valve 79 determines which of ducts 83 or 84 has air supplied thereto, thereby controlling the direction of rotation of pinion 60.
  • air is supplied to the saw motor at a pressure around lbs. per square inch.
  • the pressure regulator is provided for throttling the pressure of the supply air to approximately 20 lbs. per square inch for use with the carriage drive motor.
  • a water cooling system for the concrete saw engaged in clamp 40 is provided.
  • a cooling system is conventional and, therefore, is not illustrated in the drawing.
  • a saw according to this invention is portable and has the feature that a cut of indeterminate length may be made.
  • Prior concrete wall saws as indicated above, have the disadvantageous feature that the length of the path over which the saw was movable is fixed. As seen from the foregoing description, this restriction is not present in the apparatus described. Moreover, the present apparatus is useful with circular saws of various diameters.
  • each track unit includes a rack extending along the unit parallel to the rail flanges, and the rotatable element comprises a pinion gear.
  • Apparatus according to claim 1 including a motor connected to the rotatable element for rotating the same for self-propelling the carriage along the track means.
  • rollers are mounted on axles carried by the carriage, at least some of the axles being adjustable angularly relative to the carriage about their axes, and the rollers carried by said adjustable axles are mounted to said axles for rotation about axes eccentric to the axes of said axles.
  • Apparatus according to claim 1 including means for aligning adjacent track units relative to each other so that adjacent units are colinear.
  • the aligning means includes a projection at one end of each track unit and a recess at the other end of each unit configured to mate with the projection on the one end of the adjacent unit.
  • the carriage includes a pair of spaced parallel posts mounted adjacent the saw and extending from the carriage in a common plane parallel to the plane of rotation of the saw, a frame slidably engaged with the posts for guided movement therealong and mounting the saw, means for moving the frame along the posts, and brace means rigidly connected from the ends of the posts opposite from the carriage to the carriage opposite from the saw.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US411462A 1964-11-16 1964-11-16 Concrete cutting machine Expired - Lifetime US3323507A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US411462A US3323507A (en) 1964-11-16 1964-11-16 Concrete cutting machine
GB4735065A GB1053010A (enrdf_load_stackoverflow) 1964-11-16 1965-11-08
DE1427765A DE1427765C3 (de) 1964-11-16 1965-11-11 Führungseinrichtung für eine Betonschneidmaschine
CH1577265A CH429550A (de) 1964-11-16 1965-11-16 Vorrichtung zum Sägen von flächigen Mauerstrukturen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US411462A US3323507A (en) 1964-11-16 1964-11-16 Concrete cutting machine

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US3323507A true US3323507A (en) 1967-06-06

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US411462A Expired - Lifetime US3323507A (en) 1964-11-16 1964-11-16 Concrete cutting machine

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US (1) US3323507A (enrdf_load_stackoverflow)
CH (1) CH429550A (enrdf_load_stackoverflow)
DE (1) DE1427765C3 (enrdf_load_stackoverflow)
GB (1) GB1053010A (enrdf_load_stackoverflow)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378307A (en) * 1965-07-22 1968-04-16 Concrete Cutting Equipment Co Circular saw for cutting concrete surfaces
US3692357A (en) * 1970-06-12 1972-09-19 Manuel Coelho Mendes Da Rocha Apparatus for cutting a slot in a foundation mass for determining deformability and residual stresses in the foundation mass
US3763845A (en) * 1972-02-22 1973-10-09 Continental Drilling Co Wall saw assembly
US4054179A (en) * 1976-05-26 1977-10-18 Destree Allen L Stone and concrete cutting machine
US4373299A (en) * 1981-02-13 1983-02-15 Glendo Corporation Tool finishing machine having improved support table
US4541404A (en) * 1982-03-03 1985-09-17 Dols Robert H Tile cutting apparatus
US4552122A (en) * 1983-12-16 1985-11-12 Kelly John M Portable apparatus for shaping glass by abrasion
WO1988005370A1 (en) * 1987-01-23 1988-07-28 Anders Johnsen A sawing machine
WO1988005369A1 (en) * 1987-01-23 1988-07-28 Anders Johnsen A sawing machine
US4998775A (en) * 1989-10-10 1991-03-12 Hollifield David L Apparatus for precision cutting of concrete surfaces
US5033347A (en) * 1989-08-25 1991-07-23 Hillestad Tollief O Boiler tube cutting apparatus
US5078119A (en) * 1988-05-06 1992-01-07 Cushion Cut, Inc. Chain saw cutting assembly
US5199221A (en) * 1992-02-13 1993-04-06 Hillestad Tollief O Tube cutting apparatus
US5582538A (en) * 1994-04-04 1996-12-10 Hillestad; Tollief O. Boiler tube cutting apparatus
US5960780A (en) * 1997-03-07 1999-10-05 Harris; K. Michael Lightweight stone cutting apparatus
WO2000064652A1 (en) * 1999-04-22 2000-11-02 Aktiebolaget Electrolux Guide device for cutting with power tools
US6293269B1 (en) * 1998-08-04 2001-09-25 Hilti Aktiengesellschaft Guide rail for equipment for working on concrete and rock
US6397831B1 (en) * 1999-05-17 2002-06-04 Hilti Aktiengesellschaft Saw for cutting of hard materials
WO2003000451A3 (en) * 2001-06-20 2003-04-17 Brian Brunt A guided power tool assembly
US20030172917A1 (en) * 2002-03-18 2003-09-18 Anthony Baratta Pavement working apparatus and methods of making
US6712061B1 (en) 2001-02-20 2004-03-30 Robert M. Kalb Portable apparatus for working, shaping and polishing stone and other hard materials
US20060169269A1 (en) * 2002-03-18 2006-08-03 Anthony Baratta Movable machinery, including pavement working apparatus and methods of making
US7373936B1 (en) 2006-12-06 2008-05-20 Viateheslav Zagorouiko Portable finishing apparatus for hard material
US20160031022A1 (en) * 2013-02-14 2016-02-04 Hilti Aktiengesellschaft Method for controlling a device system during the cutting of a workpiece along a cutting line
US9533430B1 (en) 2011-10-18 2017-01-03 Robert M. Kalb Portable adjustable cutting apparatus for cutting and shaping sink holes in stone countertops
US20170028486A1 (en) * 2014-04-09 2017-02-02 Mechanical & Electrical Concepts, Inc. Magnetically Attachable and Extendable Saw and Methods for Using the Same
CN111673915A (zh) * 2020-06-29 2020-09-18 北京城建一建设发展有限公司 一种清水混凝土墙体施工缝精准切割装置及其切割方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5015096U (enrdf_load_stackoverflow) * 1973-06-02 1975-02-17
GB8706139D0 (en) * 1987-03-16 1987-04-23 Brown R Cutting apparatus
DE19826353C1 (de) * 1998-06-12 1999-12-02 Michael Weis Vorrichtung zum Dachziegelschneiden
DE10239196B3 (de) * 2002-08-21 2004-03-18 Petra Hoormann Verfahren zum zerstörungsfreien Heraustrennen fest verklebter Fliesen sowie geführte elektrische Kreissäge zur Durchführung des Verfahrens
EP2277650A3 (de) * 2009-07-23 2017-04-19 Braun Maschinenfabrik GmbH Spezialsäge
CN103170901B (zh) * 2011-12-20 2015-04-15 苏州信能精密机械有限公司 一种珩磨机的中心调整机构及方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1411864A (en) * 1920-09-16 1922-04-04 John I Mitrovich Groove cutter
US2075369A (en) * 1935-09-30 1937-03-30 Stetler Lowell Marble refacing machine
US2079864A (en) * 1936-08-10 1937-05-11 Charles B Lansing Stone quarrying machine
US2766511A (en) * 1953-07-27 1956-10-16 Montreal Architectural Iron Wo Aluminum slitting apparatus
US2965094A (en) * 1958-12-05 1960-12-20 Joe B Carrier Sawing apparatus
US3011530A (en) * 1959-07-13 1961-12-05 Lamb Ellard Guide for portable saw

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1411864A (en) * 1920-09-16 1922-04-04 John I Mitrovich Groove cutter
US2075369A (en) * 1935-09-30 1937-03-30 Stetler Lowell Marble refacing machine
US2079864A (en) * 1936-08-10 1937-05-11 Charles B Lansing Stone quarrying machine
US2766511A (en) * 1953-07-27 1956-10-16 Montreal Architectural Iron Wo Aluminum slitting apparatus
US2965094A (en) * 1958-12-05 1960-12-20 Joe B Carrier Sawing apparatus
US3011530A (en) * 1959-07-13 1961-12-05 Lamb Ellard Guide for portable saw

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3378307A (en) * 1965-07-22 1968-04-16 Concrete Cutting Equipment Co Circular saw for cutting concrete surfaces
US3692357A (en) * 1970-06-12 1972-09-19 Manuel Coelho Mendes Da Rocha Apparatus for cutting a slot in a foundation mass for determining deformability and residual stresses in the foundation mass
US3763845A (en) * 1972-02-22 1973-10-09 Continental Drilling Co Wall saw assembly
US4054179A (en) * 1976-05-26 1977-10-18 Destree Allen L Stone and concrete cutting machine
US4373299A (en) * 1981-02-13 1983-02-15 Glendo Corporation Tool finishing machine having improved support table
US4541404A (en) * 1982-03-03 1985-09-17 Dols Robert H Tile cutting apparatus
US4552122A (en) * 1983-12-16 1985-11-12 Kelly John M Portable apparatus for shaping glass by abrasion
WO1988005369A1 (en) * 1987-01-23 1988-07-28 Anders Johnsen A sawing machine
WO1988005370A1 (en) * 1987-01-23 1988-07-28 Anders Johnsen A sawing machine
US4885966A (en) * 1987-01-23 1989-12-12 Anders Johnsen Sawing machine
US4979412A (en) * 1987-01-23 1990-12-25 Johnsen Anders Sawing machine
US5078119A (en) * 1988-05-06 1992-01-07 Cushion Cut, Inc. Chain saw cutting assembly
US5033347A (en) * 1989-08-25 1991-07-23 Hillestad Tollief O Boiler tube cutting apparatus
US4998775A (en) * 1989-10-10 1991-03-12 Hollifield David L Apparatus for precision cutting of concrete surfaces
US5199221A (en) * 1992-02-13 1993-04-06 Hillestad Tollief O Tube cutting apparatus
US5582538A (en) * 1994-04-04 1996-12-10 Hillestad; Tollief O. Boiler tube cutting apparatus
US5960780A (en) * 1997-03-07 1999-10-05 Harris; K. Michael Lightweight stone cutting apparatus
US6293269B1 (en) * 1998-08-04 2001-09-25 Hilti Aktiengesellschaft Guide rail for equipment for working on concrete and rock
WO2000064652A1 (en) * 1999-04-22 2000-11-02 Aktiebolaget Electrolux Guide device for cutting with power tools
US6397831B1 (en) * 1999-05-17 2002-06-04 Hilti Aktiengesellschaft Saw for cutting of hard materials
US6712061B1 (en) 2001-02-20 2004-03-30 Robert M. Kalb Portable apparatus for working, shaping and polishing stone and other hard materials
WO2003000451A3 (en) * 2001-06-20 2003-04-17 Brian Brunt A guided power tool assembly
US7018279B2 (en) 2002-03-18 2006-03-28 Electrolux Professional Outdoor Products, Inc. Movable machinery, including pavement working apparatus and methods of making
US20040007225A1 (en) * 2002-03-18 2004-01-15 Anthony Baratta Movable machinery, including pavement working apparatus and methods of making
WO2003080304A3 (en) * 2002-03-18 2004-12-09 Electrolux Professional Outdoor Products Inc Movable machines having a housing of a fibre-reinforced composite material
US6955167B2 (en) * 2002-03-18 2005-10-18 Electrolux Professional Outdoor Products, Inc. Pavement working apparatus and methods of making
US20030172917A1 (en) * 2002-03-18 2003-09-18 Anthony Baratta Pavement working apparatus and methods of making
US20060169269A1 (en) * 2002-03-18 2006-08-03 Anthony Baratta Movable machinery, including pavement working apparatus and methods of making
US7757684B2 (en) 2002-03-18 2010-07-20 Electrolux Professional Outdoor Products, Inc. Movable machinery, including pavement working apparatus and methods of making
US20080135033A1 (en) * 2006-12-06 2008-06-12 Viateheslav Zagorouiko Portable finishing apparatus for hard material
US7373936B1 (en) 2006-12-06 2008-05-20 Viateheslav Zagorouiko Portable finishing apparatus for hard material
US9533430B1 (en) 2011-10-18 2017-01-03 Robert M. Kalb Portable adjustable cutting apparatus for cutting and shaping sink holes in stone countertops
US20160031022A1 (en) * 2013-02-14 2016-02-04 Hilti Aktiengesellschaft Method for controlling a device system during the cutting of a workpiece along a cutting line
US10688574B2 (en) * 2013-02-14 2020-06-23 Hilti Aktiengesellschaft Method for controlling a device system during the cutting of a workpiece along a cutting line
US20170028486A1 (en) * 2014-04-09 2017-02-02 Mechanical & Electrical Concepts, Inc. Magnetically Attachable and Extendable Saw and Methods for Using the Same
US20190283153A1 (en) * 2014-04-09 2019-09-19 Mechanical & Electrical Concepts, Inc. Attachable and Extendable Saw and Methods for Using the Same
CN111673915A (zh) * 2020-06-29 2020-09-18 北京城建一建设发展有限公司 一种清水混凝土墙体施工缝精准切割装置及其切割方法

Also Published As

Publication number Publication date
DE1427765B2 (de) 1974-10-10
DE1427765A1 (de) 1968-12-19
GB1053010A (enrdf_load_stackoverflow) 1966-12-30
DE1427765C3 (de) 1975-05-28
CH429550A (de) 1967-01-31

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