US2724573A - Percussion attachment for portable drills - Google Patents

Percussion attachment for portable drills Download PDF

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Publication number
US2724573A
US2724573A US445741A US44574154A US2724573A US 2724573 A US2724573 A US 2724573A US 445741 A US445741 A US 445741A US 44574154 A US44574154 A US 44574154A US 2724573 A US2724573 A US 2724573A
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United States
Prior art keywords
barrel
shank
drill
anvil
driving
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Expired - Lifetime
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US445741A
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Axel E Lundquist
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/10—Means for driving the impulse member comprising a cam mechanism
    • B25D11/102—Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool
    • B25D11/106—Means for driving the impulse member comprising a cam mechanism the rotating axis of the cam member being coaxial with the axis of the tool cam member and cam follower having the same shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/005—Attachments or adapters placed between tool and hammer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2211/00—Details of portable percussive tools with electromotor or other motor drive
    • B25D2211/06—Means for driving the impulse member
    • B25D2211/062—Cam-actuated impulse-driving mechanisms
    • B25D2211/067—Cam-actuated impulse-driving mechanisms wherein the cams are involved in a progressive mutual engagement with increasing pressure of the tool to the working surface
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18024—Rotary to reciprocating and rotary

Definitions

  • This invention relates to drills for penetrating .rock or masonry work and, in particular, to a device adapted to be used with a portable drill and effective to impart successive impact blows to the shank of a drill as it is rotated continuously.
  • the object of the invention is to improve generally upon the device of Strobel Patent No. 1,925,289, by providing an attachment which is simpler and cheaper to manufacture, more durable and efficient in operation and capable of drilling a greater depth of hole before replacement of the drill becomes necessary.
  • I employ a driving barrel having a shank adapted to be engaged by the chuck of a conventional portable drill.
  • the bar rel is rotatable in one end of a holding sleeve and has endwise engagement with an anvil fixed therein, the contacting surfaces of the barrel and anvil being toothed or notched to produce a continuou s series of impact blows on relative rotation.
  • a driven barrel rotatable in the other end of the sleeve has a shank extending rearwardly through the anvil and a chuck or socket on the forward end for receiving the shank of a drill. I provide means to insure rotation of the driven barrel withthe driving barrel but permitting relative axial movement therebetween.
  • Fig. 4 is an end elevation ;of one of said contacting ends;
  • Fig. 5 is a view similar to Fig. 1 showing. a modifica tion; I
  • Fig. 6 is an end elevation thereof;
  • H Figs. 7 and 8 are views of the modified form conesponding to Figs. 3 and 4; and
  • Fig. 9 is a partial section through a modified form of the chuck in the driven barrel.
  • the device of my invention indi cated generally at 10, comprises a driving barrel 11 having a shank 12 adapted to be inserted in the chuck 13 of a portable drill of any conventional type, preferably provided with a built-in driving motor.
  • Barrel 11 has a bore 14 extending into the end thereof opposite shank 12.
  • the barrel 11 is rotatable in one end of a holding sleeve 15 having a handle 16.
  • An anvil 17 in the form of abored cylindrical block or plug is secured in sleeve 15 by a set screw 18.
  • a driven barrel 19 rotatable in the other end of sleeve 15 has a shank 20 extending rotatably and slidably through the bore in anvil 17.
  • Barrel 19 has a socket in ,the end opposite shank 20 for receiving the shank of a Un SWSPMCMO ice rock drill 21 secured therein by a set screw 22.
  • Shank 20 has a flat 23 milled therein.
  • a tapered set screw 24 in a radial tapped hole in barrel 11 has rotary driving engagement with shank 20 but is free from binding contact therewith when turned home, so as to allow relative sliding movement between the shank and barrel 11 limited to the length of the flat but sufficient to permit endwise engagement of the driving barrel and anvil.
  • the contacting ends of the driving barrel 11 and anvil 17 have teeth or notches 25 and 26, respectively, adapted to interfit, each tooth having an inclined. cam portion terminating in a step whereby rotation of the barrel relative to the anvil while their ends are yieldably held in contact by the force exerted on chuck 13 by the user, results in a series of sharp blows being imparted to the anvil. These blows are transmitted directly to driven barrel 19 and drill 21 since the normal forward pressure on handle 16 forces the anvil against the driven barrel. Drill 21 is thus caused to exert a highly effective drilling action by a combination of rotation and percussion.
  • the attachment is ready for use upon the gripping of shank 12 in chuck 13 and the securing of drill 21 in barrel 1 9.
  • the portable drill is then held by the usual handle in the users left hand while the right grips handle 16.
  • the drill motor When the drill motor is turned on, it drives shank 12 in a clockwise direction looking forward from the motor end to the drill end, the barrel 11 drives shank 20 and the teeth of the barrel ride over those of the anvil 17, causing repeated impact to be applied to the latter by the force exerted by the users left hand.
  • FIGs. 58 show a modification which is similar in all respects to the device already described except for the shape of the teeth or notches 27 and 28 and the details .of drill chuck 29 onthe driven barrel 30.
  • This chuck includes a frusto-conical portion 31 on the barrel, having a radial hole 32 therein, intersecting the axial socket for the shank of drill 33.
  • a wedging pin 34 is fitted in hole 32.
  • a sleeve 35 having a conical bore 36 is screwed on the outer end of barrel 30 which is threaded to receive it. When the sleeve is turned home, it causes the pin to bind against the shank of the drill, holding it firmly in the socket.
  • the inner end of sleeve 35 may be groovedas at 37 to form a finger grip and the outer end may be provided with flats 38 to afford a tool hold, to facilitate tightening and releasing the chucks grip on the drill shank.
  • teeth 27 and 28 as shown is such as to impart a light tattoo or vibration to drill 33 as contrasted with the more intensive hammering caused by teeth 25 and 26.
  • Fig. 9 shows a modified form of barrel 30, designated 39, having a conical socket 40 to accommodate a tapered drill shank 41, and a transverse hole 42 for the usual knockout pin.
  • a driven barrel extending rotatably into the other end of said sleeve so as to make endwise contact with said plug, said driven barrel having a shank extending rotatably through the bore of said plug and into said driving gagg ng I 7 barrel, the adjacent ends of said driving barrel and anvil plug having i'nterfitti'n'g sets ofteeth, at least one set of teeth having a sloping carniface adapted to contact the other set at teeth whereby, on relative. rotation between the driving barrel and anvil plug; the driving; barrel is' 5 moved axially away from the anvilplug, and means slida'hl'y but; non-rotatably relating, said shank. and said drivns ba L
  • An-vattachment as defined by claim 1 characterizedby saidmeanst including, a recess in said shank and a 10 projection extending from the interior. of the driving barrel into said recess.
  • An attachment as defined by claim 2 characterize by said recess being a Hat grilled in said shank and said projection being a radial screw threaded into the driving barrel.

Description

Nov. 22, 1955 2,724,573
A- E. LUNDQUIST PERCUSSION ATTACHMENT FOR PORTABLE DRILLS Filed July 26, 1954 INVENTOR. AX EL E. LUNDQUIST ATTORNEY Axel E. Lundquist, UnityTownship,
Westmoreland County, Pa.
Application July 26, 1954, Serial No. 445,741 3 Claims. (Cl. 25541) This invention relates to drills for penetrating .rock or masonry work and, in particular, to a device adapted to be used with a portable drill and effective to impart successive impact blows to the shank of a drill as it is rotated continuously.
The object of the invention is to improve generally upon the device of Strobel Patent No. 1,925,289, by providing an attachment which is simpler and cheaper to manufacture, more durable and efficient in operation and capable of drilling a greater depth of hole before replacement of the drill becomes necessary.
In a preferredembodiment of the invention, I employ a driving barrel having a shank adapted to be engaged by the chuck of a conventional portable drill. The bar rel is rotatable in one end of a holding sleeve and has endwise engagement with an anvil fixed therein, the contacting surfaces of the barrel and anvil being toothed or notched to produce a continuou s series of impact blows on relative rotation. A driven barrel rotatable in the other end of the sleeve has a shank extending rearwardly through the anvil and a chuck or socket on the forward end for receiving the shank of a drill. I provide means to insure rotation of the driven barrel withthe driving barrel but permitting relative axial movement therebetween.
A complete understanding of the invention may be ob- .tained from the following detailed description and exing the notched contacting ends of the driving barrel and anvil;
Fig. 4 is an end elevation ;of one of said contacting ends;
Fig. 5 is a view similar to Fig. 1 showing. a modifica tion; I
Fig. 6 is an end elevation thereof; H Figs. 7 and 8 are views of the modified form conesponding to Figs. 3 and 4; and
Fig. 9 is a partial section through a modified form of the chuck in the driven barrel.
Referring now in detail to the drawings and, for the present, to Figs. 1-4, the device of my invention, indi cated generally at 10, comprises a driving barrel 11 having a shank 12 adapted to be inserted in the chuck 13 of a portable drill of any conventional type, preferably provided with a built-in driving motor. Barrel 11 has a bore 14 extending into the end thereof opposite shank 12. The barrel 11 is rotatable in one end of a holding sleeve 15 having a handle 16. An anvil 17 in the form of abored cylindrical block or plug is secured in sleeve 15 by a set screw 18.
A driven barrel 19 rotatable in the other end of sleeve 15 has a shank 20 extending rotatably and slidably through the bore in anvil 17. Barrel 19 has a socket in ,the end opposite shank 20 for receiving the shank of a Un SWSPMCMO ice rock drill 21 secured therein by a set screw 22. Shank 20 has a flat 23 milled therein. A tapered set screw 24 in a radial tapped hole in barrel 11 has rotary driving engagement with shank 20 but is free from binding contact therewith when turned home, so as to allow relative sliding movement between the shank and barrel 11 limited to the length of the flat but sufficient to permit endwise engagement of the driving barrel and anvil.
The contacting ends of the driving barrel 11 and anvil 17 have teeth or notches 25 and 26, respectively, adapted to interfit, each tooth having an inclined. cam portion terminating in a step whereby rotation of the barrel relative to the anvil while their ends are yieldably held in contact by the force exerted on chuck 13 by the user, results in a series of sharp blows being imparted to the anvil. These blows are transmitted directly to driven barrel 19 and drill 21 since the normal forward pressure on handle 16 forces the anvil against the driven barrel. Drill 21 is thus caused to exert a highly effective drilling action by a combination of rotation and percussion.
The attachment is ready for use upon the gripping of shank 12 in chuck 13 and the securing of drill 21 in barrel 1 9. The portable drill is then held by the usual handle in the users left hand while the right grips handle 16. When the drill motor is turned on, it drives shank 12 in a clockwise direction looking forward from the motor end to the drill end, the barrel 11 drives shank 20 and the teeth of the barrel ride over those of the anvil 17, causing repeated impact to be applied to the latter by the force exerted by the users left hand.
.Figs. 58 show a modification which is similar in all respects to the device already described except for the shape of the teeth or notches 27 and 28 and the details .of drill chuck 29 onthe driven barrel 30. This chuck includes a frusto-conical portion 31 on the barrel, having a radial hole 32 therein, intersecting the axial socket for the shank of drill 33. A wedging pin 34 is fitted in hole 32. A sleeve 35 having a conical bore 36 is screwed on the outer end of barrel 30 which is threaded to receive it. When the sleeve is turned home, it causes the pin to bind against the shank of the drill, holding it firmly in the socket.
The inner end of sleeve 35 may be groovedas at 37 to form a finger grip and the outer end may be provided with flats 38 to afford a tool hold, to facilitate tightening and releasing the chucks grip on the drill shank.
The shape of teeth 27 and 28 as shown is such as to impart a light tattoo or vibration to drill 33 as contrasted with the more intensive hammering caused by teeth 25 and 26.
Fig. 9 shows a modified form of barrel 30, designated 39, having a conical socket 40 to accommodate a tapered drill shank 41, and a transverse hole 42 for the usual knockout pin.
It will be apparent from the foregoing that the percussion attachment of my invention is very simple and therefore inexpensive to manufacture. At the same time, t
a driven barrel extending rotatably into the other end of said sleeve so as to make endwise contact with said plug, said driven barrel having a shank extending rotatably through the bore of said plug and into said driving gagg ng I 7 barrel, the adjacent ends of said driving barrel and anvil plug having i'nterfitti'n'g sets ofteeth, at least one set of teeth having a sloping carniface adapted to contact the other set at teeth whereby, on relative. rotation between the driving barrel and anvil plug; the driving; barrel is' 5 moved axially away from the anvilplug, and means slida'hl'y but; non-rotatably relating, said shank. and said drivns ba L An-vattachment as defined by claim 1 characterizedby saidmeanst including, a recess in said shank and a 10 projection extending from the interior. of the driving barrel into said recess.
3. An attachment as defined by claim 2 characterize by said recess being a Hat grilled in said shank and said projection being a radial screw threaded into the driving barrel.
References Cited inther file of this patent v UNITED STATES PATENT S
US445741A 1954-07-26 1954-07-26 Percussion attachment for portable drills Expired - Lifetime US2724573A (en)

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942852A (en) * 1957-01-17 1960-06-28 Muthmann Dieter Electrically driven percussion drill, particularly for drilling rock, earth, and synthetic substances
US2979962A (en) * 1958-08-15 1961-04-18 John E Nindel Percussion attachments for rotary drills
US3023628A (en) * 1960-08-01 1962-03-06 Leander J Heppner Impact tool
US3256946A (en) * 1962-05-14 1966-06-21 Huygmetaal Nv Hammer drill
US5525097A (en) * 1994-08-09 1996-06-11 Uht Corporation Air motor
US5765652A (en) * 1996-07-05 1998-06-16 Ryobi North America, Inc. Universal joint for a motorized implement
EP0856371A2 (en) * 1997-01-30 1998-08-05 HILTI Aktiengesellschaft Device for transferring axial impulses on a drill tool
US5820312A (en) * 1995-03-24 1998-10-13 Hilti Aktiensellschaft Device for transmitting impulse-like blows to a continuously rotatable tool bit
CN104837427A (en) * 2012-11-14 2015-08-12 不列颠哥伦比亚癌症机构分部 Cannulated hammer drill attachment
US20160303729A1 (en) * 2015-04-14 2016-10-20 Robert Bosch Gmbh Tool attachment for a handheld power tool
US20180111257A1 (en) * 2016-10-20 2018-04-26 Brent Gordon Mc Arthur Electric chisel capable of being matched with domestic electric drill to be used
US20210129311A1 (en) * 2019-10-31 2021-05-06 Adam Carter Universal Chisel Attachment
US11072060B2 (en) * 2019-02-25 2021-07-27 Raymond A. Noeth Tool bit assemblies
US11529148B2 (en) 2011-11-14 2022-12-20 The University Of British Columbia Intramedullary fixation system for management of pelvic and acetabular fractures
US11832856B2 (en) 2018-10-17 2023-12-05 The University Of British Columbia Bone-fixation device and system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1660579A (en) * 1927-04-16 1928-02-28 Harold I Williams Drill attachment
US1925289A (en) * 1932-12-27 1933-09-05 Frank X Strobel Rotary vibrating drill

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1660579A (en) * 1927-04-16 1928-02-28 Harold I Williams Drill attachment
US1925289A (en) * 1932-12-27 1933-09-05 Frank X Strobel Rotary vibrating drill

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2942852A (en) * 1957-01-17 1960-06-28 Muthmann Dieter Electrically driven percussion drill, particularly for drilling rock, earth, and synthetic substances
US2979962A (en) * 1958-08-15 1961-04-18 John E Nindel Percussion attachments for rotary drills
US3023628A (en) * 1960-08-01 1962-03-06 Leander J Heppner Impact tool
US3256946A (en) * 1962-05-14 1966-06-21 Huygmetaal Nv Hammer drill
US5525097A (en) * 1994-08-09 1996-06-11 Uht Corporation Air motor
US5820312A (en) * 1995-03-24 1998-10-13 Hilti Aktiensellschaft Device for transmitting impulse-like blows to a continuously rotatable tool bit
US5765652A (en) * 1996-07-05 1998-06-16 Ryobi North America, Inc. Universal joint for a motorized implement
EP0856371A2 (en) * 1997-01-30 1998-08-05 HILTI Aktiengesellschaft Device for transferring axial impulses on a drill tool
EP0856371A3 (en) * 1997-01-30 2002-11-06 HILTI Aktiengesellschaft Device for transferring axial impulses on a drill tool
US11529148B2 (en) 2011-11-14 2022-12-20 The University Of British Columbia Intramedullary fixation system for management of pelvic and acetabular fractures
US20150297245A1 (en) * 2012-11-14 2015-10-22 British Columbia Cancer Agency Branch A drill attachment for cannulated surgical drills
EP2919689A4 (en) * 2012-11-14 2016-11-23 British Columbia Cancer Agency Cannulated hammer drill attachment
US9532789B2 (en) 2012-11-14 2017-01-03 British Columbia Cancer Agency Branch Cannulated hammer drill attachment
US9615835B2 (en) * 2012-11-14 2017-04-11 British Columbia Cancer Agency Branch Drill attachment for cannulated surgical drills
US20170164953A1 (en) * 2012-11-14 2017-06-15 British Columbia Cancer Agency Branch Drill attachment for cannulated surgical drills
CN104837427B (en) * 2012-11-14 2017-09-22 不列颠哥伦比亚癌症机构分部 Tubulose hammer drill accessory
CN104837427A (en) * 2012-11-14 2015-08-12 不列颠哥伦比亚癌症机构分部 Cannulated hammer drill attachment
US20160303729A1 (en) * 2015-04-14 2016-10-20 Robert Bosch Gmbh Tool attachment for a handheld power tool
US10661421B2 (en) * 2015-04-14 2020-05-26 Robert Bosch Gmbh Tool attachment for a handheld power tool
US20180111257A1 (en) * 2016-10-20 2018-04-26 Brent Gordon Mc Arthur Electric chisel capable of being matched with domestic electric drill to be used
US11832856B2 (en) 2018-10-17 2023-12-05 The University Of British Columbia Bone-fixation device and system
US11072060B2 (en) * 2019-02-25 2021-07-27 Raymond A. Noeth Tool bit assemblies
US20210129311A1 (en) * 2019-10-31 2021-05-06 Adam Carter Universal Chisel Attachment

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