US3606558A - Support for portable drilling machines or the like - Google Patents

Support for portable drilling machines or the like Download PDF

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Publication number
US3606558A
US3606558A US842463A US3606558DA US3606558A US 3606558 A US3606558 A US 3606558A US 842463 A US842463 A US 842463A US 3606558D A US3606558D A US 3606558DA US 3606558 A US3606558 A US 3606558A
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US
United States
Prior art keywords
gage
column
arm
base
support
Prior art date
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
Application number
US842463A
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English (en)
Inventor
Herbert Dieterle
Alfred Hettich
Kurt Paule
Eberhard Vogel
Max Burklin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
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Publication of US3606558A publication Critical patent/US3606558A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • B25H1/0042—Stands
    • 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
    • Y10T408/21—Cutting by use of rotating axially moving tool with signal, indicator, illuminator or optical means
    • 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
    • Y10T408/65—Means to drive tool
    • 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
    • Y10T408/91—Machine frame
    • 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
    • Y10T82/00—Turning
    • Y10T82/25—Lathe
    • Y10T82/2572—Attachment
    • Y10T82/2574—Stop [e.g., carriage, tool, work, etc.]

Definitions

  • a support for portable drilling machines comprises a column extending upwardly from a work supporting base, a clamp movable along the column, an arm movable along the column with reference to the clamp and having means for holding a drilling machine so that the tip of the drilling tool extends toward the base, and a feed depth selecting device including an externally threaded gage in a vertical bore of the arm and a locking bolt having threads which normally mate with the threads of the gage.
  • the bolt can be disengaged from the gage in response to application of finger pressure and the gage abuts against the clamp when the arm moves the machine to the lowermost position in which a workpiece mounted on the base is formed with a hole of desired depth.
  • a scale on the arm cooperates with an index on the clamp to indicate the position of the arm with reference to the clamp.
  • the present invention relates to supports or stands for portable power tools, particularly to improvements in supports for portable drilling machines. Still more particularly, the invention relates to improvements in feed depth selecting devices which are provided on such supports to determine the depth of holes which are to b drilled into workpieces.
  • the feed depth gage of a conventional support normally comprises a smooth-surfaced pin which is mounted in a bore of the arm and is movable to an infinite number of positions in each of which it can be fixed by means of a locking screw or the like.
  • the tip of the smooth-surfaced pin engages a clamp which is adjustably mounted on and is movable lengthwise of the column.
  • an externally threaded gage which meshes with an internally threaded portion of the arm so that it can move to a selected position in response to rotation relative to the arm.
  • a drawback of the just described feed depth gages is that they cannot be properly adjusted without resorting to a trial and error procedure. Therefore, such gages are not practical for use in connection with drilling machines which are employed to drill holes of difierent depth into each of a series of successive workpieces. This is due to the fact that too much time is lost for adjustment of the gage prior to each drilling operation. Moreover, such gages are not suited for manipulation by tinkers in do-ityourself workships because an unskilled person is unlikely to properly adjust the gage prior to starting of a drilling operation. Another drawback of many presently known feed depth gages is that they are free to fall out of their bore by gravity as soon as the clamping screw is loosened.
  • An object of our invention is to provide a novel and improved support for portable power tools, particularly for portable drilling machines, wherein the device which carries the portable tool can be rapidly, accurately and conveniently moved to any one of a large number of positions to thus select the depth of holes which are to be drilled in a workpiece.
  • Another object of the invention is to provide a support for portable power tools with a novel and improved feed depth selecting device which can be readily manipulated not only by skilled workmen but also by persons having little technical skill.
  • a further object of the invention is to provide a feed depth selecting device which can be rapidly adjusted to effect substantial changes in depth of successively drilled holes but which is also capable of permitting precise setting of the drilling tool for drilling of bores having an accurately determined depth.
  • An additional object of the invention is to provide a support for portable power tools with novel tool carrying and clamping devices.
  • Still another object of the invention is to provide the support with a novel system of scales and pointers which facilitate visual observation of the position of the tool carrying device to thus enable an operator to rapidly and accurately set the feed depth selecting device prior to drilling of a hole.
  • An ancillary object of the invention is to provide the support with novel means for moving the tool carrying device with reference to the column.
  • the improved support comprises a base, a column extending upwardly from and preferably anchored in the base, a locating device (e.g., a clamping member) movable along the column, a capstan screw or other suitable means for releasably securing the locating device to the column, an arm or another suitable carrier device movable along the column relative to the locating device and provided with suitable tool supporting means which is preferably designed to support a power tool in such position that the tip of the material removing tool extends downwardly toward a workpiece which is mounted on the base, a lever or other suitable means for moving the carrier device with reference to the column, and feed depth selecting means including a preferably stud-shaped gage mounted on one of the devices for movement in the axial direction of the column to one of a plurality of positions in each of which the gage permits the carrier device to move through a different distance with reference to the locating device, and locking means mounted on the one device and movable between first and second positions in which it respectively engages with and is disengage
  • the gage and the locking means are provided with complementary threads which mate with each other in the first position of the locking means.
  • the axial position of the gage can be rapidly changed by moving the locking means to second position so that the gage is free to move in the axial direction of the column (coarse adjustment). If a fine adjustment is desired, the gage is rotated with reference to the locking means while the latter dwells in the first position.
  • FIG. 1 is a plan view of a support which embodies one form of the invention, with certain parts shown in sectron;
  • FIG. 2 is a side elevational view of the support, with a portion of the base shown in vertical section;
  • FIG. 3 is a horizontal sectional view as seen in the direction of arrows from the line IIIIII of FIG. 2;
  • FIG. 4 is an end elevational view of the support as seen from the left-hand side of FIG. 2;
  • FIG. 5 is a view of a detail as seen in the direction of arrow V in FIG. 4;
  • FIG. 6 is a view as seen in the direction of arrow VI in FIG. 1;
  • FIG. 7 is a fragmentary end elevational view of a second support.
  • FIG. 8 is a horizontal sectional view as seen in the direction of arrows from the line VIIIVIII of FIG. 7.
  • the support comprises a base 11 which preferably consists of cast aluminum or other light metal and is formed with grooves 12 for clamping devices which secure a workpiece, not shown.
  • the base 11 is further provided with recessed eyes 13 for the passage of bolts which secure it to a bench, table or the like, not shown.
  • the upper surface of the base 11 is flat and smooth and one of its narrower sides is formed with an upright sleeve or socket 14 having a bore 15 for a steel column 16 of cylindrical outline.
  • the column 16 may be a rod or a tube. The axis of this column is normal to the upper surface of the base 11.
  • the column 16 serves as a guide for a substantially rectangular clamping member 17 which is movable therealong and can be arrested and fixed in a selected position by a capstan screw 18 having a tommy bar 18a.
  • the stem 28 of the screw 18 meshes with a nut 19 which is provided on the clamping member 17.
  • the column 16 further supports a vertically movable supporting arm or carrier device 20 which has a bore 36 for reception of a portion of a portable drilling machine.
  • the clamping member 17 serves as a locating device for the arm 20, i.e., it determines the maximum extent to which the arm is movable relative to the column 16.
  • the arm 20 comprises a box-shaped end portion 23 provided with two eyes 21, 22 which flank the clamping member 17 and are slidably guided by the column 16.
  • the distance between the eyes 21, 22 and the height of the clamping member 17 determine the maximum extent to which the arm 20 is movable with reference to the column 16 when the clamping member is fixed in position by the screw 18.
  • the eyes 21, 22 respectively constitute the lower and upper parts of the box-shaped portion 23.
  • the aforementioned nut 19 of the clamping member 17 faces a vertically extending wall of the box-shaped portion 23, and such wall is provided with an elongated slot 24 extending in parallelism with the column 16.
  • the portion 23 carries or is integral with vertical Ways 25 which flank the slot 24 and have precision finished vertical surfaces serving to guide a rectangular follower 26 which is provided with a bore 27 for the stem 28 of the screw 18.
  • That portion of the stem 28 which is outwardly adjacent to the follower 26 is straddled by the prongs of the partially bifurcated end of a two-armed shifting lever 29.
  • the right-hand end portion of the lever 29 has an elongated slot 30 which receives the stem 28 of the screw 18.
  • a pressure transmitting stud 32 in the bore of the nut 19 serves to engage the peripheral surface of the column 16 when the screw 18 is applied to thereby hold the clamping member 17 against axial movement and to simultaneously locate the arm 20 at a desired level above the base 11 in such a way that the arm can move up and down in response to pivoting of the lever 29.
  • the other end portion of the lever 29 is provided with a manually operated handle 34.
  • That end portion 35 of the arm 20 which is remote from the box-shaped portion 23 serves as a power tool supporting means and is formed with a slot 3511 which communicates with the bore 36 for the drilling machine.
  • a second capstan screw 37, having a tommy bar 37a, is provided on the end portion 35 to facilitate proper clamping and rapid disengagement of a drilling machine from the arm 20.
  • a median portion of the arm 20 is provided with a horizontal pivot pin 38 for the lever 29.
  • the pivot pin 38 carries an elastic washer 39 which is outwardly adjacent to the lever 29.
  • a helical torsion spring 40 surrounds a sleeve 41 which forms part of the arm 20 and accommodates the pivot pin 38.
  • One end portion 401: of the spring 40 is hooked and engages the left-hand arm of the lever 29 (as viewed in FIGS. 1 or 2) to bias the lever in a clockwise direction.
  • the other end portion of the spring 40 is anchored in or otherwise secured to the arm 20.
  • the upper part of the box-shaped portion 23 of the arm 20 is thicker than the eye 21 and is provided with a vertical cylindrical bore 42 for a feed depth gage 43.
  • the gage 43 is a cylindrical stud and its major part is formed with external threads.
  • the upper end portion of the gage 43 is knurled or milled so that it can be readily engaged and rotated by fingers.
  • the lower end portion of the gage 43 can move into abutment with an upper surface of the clamping member 17.
  • the means for locating the gage 43 in selected position of axial adjustment with reference to the arm 20 comprises a locking bolt which extends through a blind rectangular horizontal passage or bore 44 of the portion 23 and is normally biased into locking engagement With the threaded portion of the gage 43. As shown in FIG.
  • FIG. 6 one of the vertical walls which surround the bore 44 is located in a plane which includes the axis of the gage 43, and FIG. 3 shows that one side surface of the locking bolt 45 has a notch 45a which can readily accommodate the adjoining threaded portion of the gage 43 so that the latter is then free to move up or down in parallelism with the column 16.
  • the locking bolt 45 is further provided with a smaller notch 45b which can receive the adjoining externally threaded portion of the gage 43 and is formed with internal threads which then mate with the threads of the gage so that the latter is held against uncontrolled axial movement in the bore 42.
  • the internal threads in the notch 45b of the locking bolt 45 preferably extend along an arc which does not exceed 90 degrees.
  • the operator simply depresses the locking bolt 45 so that the notch 45a receives the adjoining portion of the gage with sufiicient clearance to permit rapid axial displacement of the gage.
  • the combined length of the notches 45a, 45b (as seen in the longitudinal direction of the locking bolt 45) equals or approximates one-and-one-half times the diameter of the threaded portion of the gage 43.
  • That portion of the locking bolt 45 which is formed with the smaller notch 45b can be said to form part of a nut which can be brought into mesh with the gage 43 when the spring 46 is free to expand and which can be disengaged from the gage in response to depression of the bolt 45.
  • a part of the box-shaped portion 23 is formed with a rectangular window 47 which receives a transparent pane 48 preferably consisting of synthetic plastic material and permitting observation of an index 49 on the clamping member 17.
  • the pane 48 can be riveted onto the portion 23 so that it overlaps the window 47.
  • This pane is formed with a vertical scale whose graduations indicate the position of the lower end of the gage 43 and serve to facilitate proper setting of the arm 20 so as to insure that the material removing tool of the drilling machine which is affixed to the arm 20 can drill a hole of desired depth.
  • the index 49 of the clamping member 17 registers with the zero graduation on the scale of the pane 48 when the arm 20 is moved to the uppermost position with reference to the clamping member.
  • the lower end of the gage 43 registers with the zero graduation of such scale when the gage 43 is permitted to descend all the Way so that it abuts against the upper surface of the clamping member 17 Such upper surface is located at the level of the index 49.
  • a workpiece is placed onto the upper surface of the base 11 and is thereupon clamped to the base subsequent to proper orientation.
  • the drilling machine is assumed to be mounted on and secured to the arm 20 so that a portion thereof extends into the bore 30 and that the tip at the lower end of the tool exends downwardly toward the base 11.
  • the screw 18 is thereupon loosened so that the clamping member 17 can be shifted in order to move the arm 20 to one of a range of satisfactory positions for the drilling of a hole.
  • the tommy bar 18a is thereupon rotated to cause the stud 32 to move into requisite engagement with the column 16 and to thus hold the clamping member 17 against axial movement.
  • the operator must memorize the first reading and he must thereupon move the arm 20 downwardly to a second position beyond the memorized position through a distance which corresponds to the desired depth of the hole.
  • the locking bolt 45 is then released so that the gage 43 is automatically locked in a position which is indicative of the desired depth of the hole to be drilled in the particular position of the clamping member 17.
  • Accurate adjustments can be effected by rotating the gage 43 with reference to the bolt 45 and arm 20.
  • the arm 20 is then permitted to return to its upper end position (in which its lower eye 21 abuts against the clamping member 17) and the workpiece is again secured to the upper side of the base 11 in an optimum position for drilling of the hole.
  • the drilling then proceeds by starting the motor of the drilling machine and by pivoting the lever 29 until the tip of the gage 43 engages the upper surface of the clamping member 17 This prevents further penetration of the tool into the workpiece and the operator thereupon lifts the arm 20 and disengages the workpiece from the base 11.
  • a skilled workman can properly set the gage 43 without removing the workpiece from the base 11.
  • the workman rotates the gage 43 to move it to a position in which the distance between its lower end and the index 49 of the clamping member 17 corresponds to the desired depth of the hole to be drilled in the workpiece.
  • the lower end of the gage 43 can be observed through the pane 48. In reading the position of the lower end of the gage 43, the workman must take into consideration the parallax.
  • FIGS. 1-6 can be slightly modified for the purpose of insuring that even an unskilled or semi-skilled Workman need not remove the workpiece in order to properly set the gage 43 prior to drilling a hole of desired depth.
  • the gage 43 is then provided with an index 49' (FIGS. 7 and 8) which can be observed behind the pane 48 (without any consideration of the parallax) to indicate the position of the gage with reference to the scale on the pane 48.
  • the arm 20 is moved to one of a range of satisfactory positions and the lever 29 is then pivoted to move the arm 20 downwardly until the tip of the tool engages the workpiece.
  • the Workman then reads the position of the index 49' with reference to the scale on the pane 48.
  • the gage 43 is then adjusted in such a way that its index 49' registers with a graduation whose distance from the graduation pinpointed by the index 49 equals the desired depth of the hole to be drilled in the workpiece. Rapid setting of the gage 43 can be effected by depressing the locking bolt 45 and by thereupon moving the gage to desired position. If a precision adjustment is needed, the bolt 45 is released to move its nut (notch 45b) into mesh with the gage 43, and the latter is thereupon rotated with reference to the bolt 45 and arm 20. The drilling operation can begin as soon as the gage 43 assumes the desired position.
  • the gage 43 is thereupon adjusted so that its index 49 registers with that graduation which indicates the desired depth of the hole to be drilled in the workpiece (e.g., in millimeters).
  • the numeral 50 denotes a guide rail or frame member for the pane 48'.
  • the pane 48 or 48' can be mounted on the clamping member 17.
  • the pane 48 or 48 can be replaced by an opaque scale if the gage 43 and/or the clamping member 17 is provided with an index (e.g., a needle) which is movable in front of such opaque scale.
  • the gage 43 and the locking bolt 45 can be mounted on the clamping member 17.
  • a support for portable drilling machines or like power tools comprising a base; a column extending upwardly from said base; a locating device on said column; a carrier device movable along said column and having power tool supporting means; means for moving said carrier device with reference to said column; and feed depth selecting means including an externally threaded gage mounted on one of said devices for movement in the axial direction of said column to one of a plurality of positions in each of which the gage permits the carrier device to move through a different distance with reference to said locating device, and locking means having an internally threaded portion and confined in said one device for movement substantially tangentially of said gage between first and second positions in which said internally threaded portion thereof respectively engages with and is disengaged from the external threads of said gage, said gage being movable in the axial direction of said column in the first position of said locking means in response to rotation of the gage with reference to said one device and said gage being freely movable in the axial direction of said column in the second position of said locking means
  • a support for portable drilling machines or like power tools comprising a base; a column extending upwardly from said base; a locating device on said column;
  • feed depth selecting means including a gage mounted on one of said devices for movement in the axial direction of said column to one of a plurality of positions in each of which the gage permits the carrier device to move through a different distance with reference to said locating device, and locking means mounted on said one device and movable between first and second positions in which said locking device respectively engages with and is disengaged from said gage, said gage being movable in the axial direction of said columin in the first position of said locking means in response to rotation of the gage with reference to said one device; scale means provided with graduations indicating different feed depths; first index means arranged to pinpoint graduations on said scale means, said scale means being provided on one of said devices and said index means being provided on the other device; and second index means provided on said gage and arranged to pinpoint on said scale the position of said gage with reference to that device which is provided with said scale means.
  • a support for portable drilling machines or like power tool comprising a base; a column extending upwardly from said base; a locating device on said column;
  • feed depth selecting means including a gage mounted on said carrier device for movement in the axial direction of said column to one of a plurality of positions in each of which the gage permits the carrier device to move through a different distance with reference to said locating device, and locking means mounted on said carrier device and movable between first and second positions in which said locking means respectively engages with and is disengaged from said gage, said gage being movable in the axial direction of said column in the first position of said locking means in response to rotation of the gage with reference to said carrier device; scale means provided on said carrier device; and index means provided on said locating device adjacent to said scale means to indicate the position of said devices with reference to each other, said locating device being provided with a stop surface located at the level of said index means and arranged to arrest said gage when the latter descends by gravity in response to movement of said locking means to the second position thereof.
  • a support for portable drilling machines or like power tools comprising a base; a locating device on said column; a carrier device movable along said column and having power tool supporting means; means for moving said carrier device with reference to said column; feed depth selecting means including a gage mounted on one of said devices for movement in the axial direction of said column to one of a plurality of positions in each of which the gage permits the carrier device to move through a different distance with reference to said locating device, and locking means mounted on said one device and movable between first and second positions in which said locking means respectively engages with and is disengaged from said gage, said gage being movable in the axial direction of said column in the first position of said locking means in response to rotation of the gage with reference to said one device; scale means mounted on said carrier device for movement in the axial direction of said column; and index means provided on said locating device and cooperating with said scale means to pinpoint the position of said carrier device with reference to said locating device.
  • a support for portable drilling machines or like power tools comprising a base; a column extending upwardly from said base; a locating device on said column; a carrier device movable along said column and having power tool supporting means; means for moving said carrier device with reference to said column; feed depth selecting means including a gage mounted on one of said devices for movement in the axial direction of said column to one of a plurality of positions in each of which the gage permits said carrier device to move through a different distance With reference to said locating device, and locking means mounted on said one device and movable between first and second positions in which said locking means respectively engages With and is disengaged from said gage, said gage being movable in the axial direction of said column in the first position of said locking means in response to rotation of said gage with reference to said one device; light-transmitting scale means having a row of graduations extending in parallelism with said column; and index means located behind said scale 10 devices and said index means being provided on the other device.
  • said scale means being provided on one of said 15 82-34A; 408 -124, 234

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
US842463A 1968-07-24 1969-07-17 Support for portable drilling machines or the like Expired - Lifetime US3606558A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1752837A DE1752837C3 (de) 1968-07-24 1968-07-24 Bohrstaender

Publications (1)

Publication Number Publication Date
US3606558A true US3606558A (en) 1971-09-20

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ID=5692978

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Application Number Title Priority Date Filing Date
US842463A Expired - Lifetime US3606558A (en) 1968-07-24 1969-07-17 Support for portable drilling machines or the like

Country Status (5)

Country Link
US (1) US3606558A (de)
CH (1) CH490917A (de)
DE (1) DE1752837C3 (de)
FR (1) FR2013581A1 (de)
GB (1) GB1264247A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2701358C2 (de) * 1977-01-14 1982-12-02 Robert Bosch Gmbh, 7000 Stuttgart Arbeitsständer für Kraftwerkzeuge
DE3840018A1 (de) * 1988-11-26 1990-05-31 Werkzeug Gmbh Bohrstaender fuer handbohrmaschinen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE912519C (de) * 1945-06-06 1954-05-31 Tarex Sa Gewindeschneidautomat
DE961925C (de) * 1954-03-21 1957-04-11 Scheer & Cie C F Einrichtung an Vorsatzgeraeten fuer tragbare, durch elektrischen Handmotor angetriebene Werkzeuge
US3202190A (en) * 1959-07-14 1965-08-24 John B Gill Adjustable pipe machining tool

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Publication number Publication date
DE1752837B2 (de) 1974-04-04
CH490917A (de) 1970-05-31
FR2013581A1 (de) 1970-04-03
GB1264247A (de) 1972-02-16
DE1752837C3 (de) 1974-10-24
DE1752837A1 (de) 1971-04-08

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