US3910590A - Tool retainer - Google Patents

Tool retainer Download PDF

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Publication number
US3910590A
US3910590A US482238A US48223874A US3910590A US 3910590 A US3910590 A US 3910590A US 482238 A US482238 A US 482238A US 48223874 A US48223874 A US 48223874A US 3910590 A US3910590 A US 3910590A
Authority
US
United States
Prior art keywords
latch
tool
sleeve
resilient
locking means
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
US482238A
Other languages
English (en)
Inventor
Gosta Ivar Ekstrom
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.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
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 Atlas Copco AB filed Critical Atlas Copco AB
Application granted granted Critical
Publication of US3910590A publication Critical patent/US3910590A/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
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/08—Means for retaining and guiding the tool bit, e.g. chucks allowing axial oscillation of the tool bit
    • B25D17/082—Retainers consisting of a swinging yoke or latching 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S279/00—Chucks or sockets
    • Y10S279/904—Quick change socket
    • 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
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17042—Lost motion
    • Y10T279/17051—Swinging external yoke or detent
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/57—Distinct end coupler
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/60—Biased catch or latch
    • Y10T403/608—Pivoted

Definitions

  • ABSTRACT A tool retainer adapted for impacting machines and [52] 279/l9'l; 279/1 403/300 comprising a latch mounted in a s1eeve of resilient ma- I t C 2 1 3632 terial.
  • the latch is releasably locked in a tool securing n b t 58 Field of Search 279/191, 19.6, 19, 19.2, y Snap ac 279/19.5,1 Q, 77, 78; 403/300, 305, 12 Clalms, 5 a g Figures 3 L Z I II III US. Patent Oct. 7,1975 Sheet 2 of2 3,910,590
  • TOOL RETAINER This invention relates to a tool retainer, particularly for use with hand-held impacting machines.
  • a tool retainer for retaining a tool having a shank with a collar thereon, comprising a sleeve of resilient material, a latch for retaining the tool mounted in the sleeve, the latch having a working surface for abutting the collar of the tool to retain the tool, the latch being movable between an active position where it projects into the axial passage through the sleeve to retain the tool and an inactive position where it is substantially withdrawn from said axial passage to allow withdrawal of the tool, and locking means for locking the latch in the active position by snappingit past a portion of the sleeve.
  • the tool retainer can be made from a small number of parts, and that insertion of the tool and subsequent locking of the latch is a very simple operation.
  • the latch is pivotable about a latch pin mounted in part of the resilient sleeve, so that impacts of the tool collar on the working surface of the latch are at least partly absorbed by the resilient latch mounting.
  • the locking means is provided by a space between two resilient lugs, the space having a wider portion of similar or larger cross-section than a handle of the latch and a narrower portion through which the handle can only pass when the lugs are resiliently displaced relative to each other.
  • the sleeve, locking means and latch pin mounting are all formed from one piece of resilient material.
  • the sleeve rear end portion is secured around a relatively non-resilient tool holder in which the rear end portion of the tool can slide.
  • FIG. 1 is a section through the end of an impacting machine incorporating a tool retainer in accordance with the invention
  • FIG. 2 is a section on the line II-II of FIG. 1;
  • FIG. 3 is a section on the line III-III of FIG. 1;
  • FIG. 5 is a section on the line VV of FIG. 4.
  • a sleeve 1 of resilient material is fitted tightly around a tool holder 2 forming part of the housing of an impacting machine such as a concrete breaker, a rock drill or the like. At its other end, the sleeve, has an axial passage 3 of larger diameter than the diameter of a collar 4 of a tool shank 5.
  • the sleeve 1 may all be molded as a single piece, and can be a snap fit on the tool holder 2. When it is necessary to separate the two parts,
  • the tool shank 5 has a suitably shaped, preferably hexagonal portion 6 which is a sliding fit in the tool holder 2.
  • a latch 7 with a handle 8 is journalled on a pivot pin 9, the pivot pin being of example, with reference to the accompanying drawmounted in lugs 10 made of resilient material with resilient retaining shoulders 17.
  • the latch 7 has a working surface 11 arranged at right angles to the direction of movement of the tool, and the sleeve 1 has a recess 12 with an abutment surface 16 for the surface 11 to receive the working surface 11 when the latch is opened to allow the tool to be inserted or removed.
  • the resilient material referred to above may for instance be a plastic material such as caprolactan, polyether urethane, or other materials of the polyeth'er or polyester type.
  • FIG. 2 shows how the handle 8 is held in the locking means to retain the working surface 11 in the working position.
  • lugs 13,14 must be pushed apart sufficiently to allow the handle 8 to pass between them, after which they snap back into position, and the handle 8 is secured.
  • the handle 8 can conveniently be operated by the operators foot, and the rigidity of the lugs 13,14 is designed in accordance with this.
  • the latch 7 is pivoted so that the surface 11 is accommodated in the recess 12.
  • the hexagonal portion 6 of the tool can then be pushed into the tool holder 2, and the collar 4 will be able to pass the latch 7.
  • the latch 7 is again pivoted so that the surface 11 projects into the passage 3 and abuts against the collar 4 if the tool moves in the direction of the arrow 15.
  • FIG. 4 A second embodiment of a tool retainer is shown in FIG. 4.
  • similar parts to those shown in FIG. 1 are given the same reference numerals.
  • the latch 20 is movable along its own axis between active and inactive positions.
  • the latch 20 has a working surface 21 shaped to fit with the collar 4 of the tool, and a projection 22 for helping to move the latch 20 along its axis.
  • a resilient stop arrangement is indicated at 23. When the narrow or necked down portion of the latch 20 is held by the stop arrangement 23, the surface 21 is in its active position, and will prevent removal of the tool from the sleeve 1.
  • the projection 22 is pushed away from the sleeve 1 This can be done with the .foot.
  • the stop arrangement 23 disengages and the working surface 21 moves out of the passage 3'.
  • a secondary stop arrangement is shown at 24,25,26 which prevents the latch 20 from falling completely out of the sleeve, and from falling back into the active postion.
  • lugs are provided on the end of the sleeve 1 which cooperate with correspond ing metal lugs projecting from the tool holder 2. This configuration prevents rotation of the sleeve 1 on the tool holder 2, and also allows the orientation of the latch with respect to the impact machine to be altered, for instance to suit a rightor left-handed operator.
  • FIG. 5 shows an alternative arrangement for achiev-' ing the same object.
  • the tool holder 2 can be placed in four different angular positions relative the sleeve 1.
  • the tool is hit at the rear end of the hexagonal portion 6 and the impact thus received is transmitted in the direction shown by the arrow 15 to the working surface against which the tool is urged by the machine operator.
  • the collar 4 does not hit against the surfaces 11 (FIG. 1) or 21 (FIG. 4) on the outward stroke.
  • the collar 4 will hit the surface 11 (or 21). If and when the collar 4 reaches the surface 11 (or 21), the tool is stopped and the energy is absorbed partly by the resilient sleeve 1, which may stretch a little along the direction 15 and partly in the FIG. 1 embodiment by the resilient pivot pin lugs which may allow the latch to move a small distance relative to the sleeve 1.
  • the metal latch member can be made of a much harder and more wear-resistant material than was hitherto possible.
  • the shock produced by impacts of the tool collar on the latch is absorbed by the resilient material and there is thus a considerably reduced tendency to crack the latch.
  • the latch may, for instance, be case-hardened. This makes the metal more suscepti ble to cracking, but this is not so important with a resilient sleeve.
  • a resilient sleeve also makes operation of the impacting machine less noisy, and contributes towards a lower overall weight of the machine.
  • a tool retainer for retaining a tool having a shank with a collar thereon comprising:
  • a sleeve of resilient material having an axial passage therethrough for receiving said tool therein
  • a latch movably mounted in the sleeve for retaining the tool in the sleeve, the latch having a working surface for abutting the collar of the tool to retain the tool, the latch being movable between an active position where it projects into the axial passage throughthe sleeve to retain the tool and an inactive position where it is substantially withdrawn from said axial passage to allow withdrawal of the tool, and
  • a tool retainer for retaining a tool having a shank with a collar thereon comprising:
  • a sleeve of resilient material having an axial passage therethrough for receiving said tool therein
  • a latch pivotally mounted to the sleeve for retaining the tool in the sleeve, the pivotable latch having a working surface movable upon pivoting of said latch to a working position for abutting the collar of the tool to retain the tool, the latch being pivotable to move the working surface towards and away from the axial passage through the sleeve, and
  • locking means including a resilient sleeve portion normally projecting in the path of movement of said latch for lockingly engaging said latch in the working position by moving said latch past said projecting sleeve portion, said projecting sleeve portion snapping substantially back to its normally projecting position after passage of said latch, thereby locking said latch in said working position.
  • a tool retainer as claimed in claim 2 comprising a latch pin mounted in part of the resilient sleeve and about which said latch is pivotally mounted, so that impacts of the tool collar on the working surface of the latch are, at least partly, absorbed by the resilient latch mounting.
  • a tool retainer as claimed in claim 2 wherein said latch has a handle, and wherein the locking means comprises two resilient lugs having a space therebetween, the space having a wider portion of similar or larger cross-section than the handle of the latch, and a narrower portion through which the handle can only pass when the lugs are resiliently displaced relative to each other.
  • a tool retainer as claimed in claim 3 wherein said latch has a handle, and wherein the locking means comprises two resilient lugs having a space therebetween, the space having a wider portion of similar or larger cross-section than the handle of the latch, and a narrower portion through which the handle can only pass when the lugs are resiliently displaced relative to each other.
  • a tool retainer as claimed in claim 11 wherein said locking means comprises a first locking means for locking said latch in said active position and a second locking means for locking said latch in said inactive position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
US482238A 1973-07-11 1974-06-24 Tool retainer Expired - Lifetime US3910590A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3315973A GB1382019A (en) 1973-07-11 1973-07-11 Tool retainer

Publications (1)

Publication Number Publication Date
US3910590A true US3910590A (en) 1975-10-07

Family

ID=10349306

Family Applications (1)

Application Number Title Priority Date Filing Date
US482238A Expired - Lifetime US3910590A (en) 1973-07-11 1974-06-24 Tool retainer

Country Status (5)

Country Link
US (1) US3910590A (sv)
CA (1) CA1001396A (sv)
FR (1) FR2237426A7 (sv)
GB (1) GB1382019A (sv)
SE (1) SE405328B (sv)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4067400A (en) * 1976-07-29 1978-01-10 Igor Vladimirovich Nikolaev Pneumatic hammer
US4081038A (en) * 1975-04-22 1978-03-28 Atlas Copco Aktiebolag Hand held impact device
US4231580A (en) * 1978-08-07 1980-11-04 Henri Emonet Lost motion tool retainer
WO1988001199A1 (en) * 1986-08-14 1988-02-25 Vita-Mix Corporation An agitator for a food mixer
US4946287A (en) * 1986-08-14 1990-08-07 Vita-Mix Corporation Agitator for a food mixer and method of use thereof
US5288161A (en) * 1992-02-14 1994-02-22 The Wooster Brush Company Quick release lock mechanisms
US6935436B1 (en) * 2003-08-01 2005-08-30 The United States Of America As Represented By The Secretary Of The Air Force Double-headed tent stake driver and puller having twin release levers
US20070024012A1 (en) * 2005-07-28 2007-02-01 Hilti Aktiengesellschaft Percussion tool chuck with a retaining stirrup
US20110216624A1 (en) * 2010-03-04 2011-09-08 Vita-Mix Corporation Agitator release for a food mixer
US20120038119A1 (en) * 2009-01-30 2012-02-16 Hilti Aktiengesellschaft Tool holder
CN102922488A (zh) * 2012-10-23 2013-02-13 嘉兴大工匠机械有限公司 一种可调打钉深度的打钉机保险机构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2377520A1 (fr) * 1977-01-12 1978-08-11 Maco Meudon Sa Dispositif pour le montage d'un decaleur sur le corps d'un marteau brise-beton
GB2394202A (en) 2002-10-18 2004-04-21 Black & Decker Inc Tool holder for impacting machine
US20170173765A1 (en) * 2015-12-17 2017-06-22 Yih Cheng Factory Co., Ltd Combinative connector

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1176343A (en) * 1915-07-07 1916-03-21 Charles Christiansen Tool-retainer for percussive hammers.
US2298719A (en) * 1940-12-12 1942-10-13 Chicago Pneumatic Tool Co Implement retainer
US3525531A (en) * 1967-12-27 1970-08-25 Atlas Copco Ab Tool retainer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1176343A (en) * 1915-07-07 1916-03-21 Charles Christiansen Tool-retainer for percussive hammers.
US2298719A (en) * 1940-12-12 1942-10-13 Chicago Pneumatic Tool Co Implement retainer
US3525531A (en) * 1967-12-27 1970-08-25 Atlas Copco Ab Tool retainer

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4081038A (en) * 1975-04-22 1978-03-28 Atlas Copco Aktiebolag Hand held impact device
US4067400A (en) * 1976-07-29 1978-01-10 Igor Vladimirovich Nikolaev Pneumatic hammer
US4231580A (en) * 1978-08-07 1980-11-04 Henri Emonet Lost motion tool retainer
WO1988001199A1 (en) * 1986-08-14 1988-02-25 Vita-Mix Corporation An agitator for a food mixer
US4946287A (en) * 1986-08-14 1990-08-07 Vita-Mix Corporation Agitator for a food mixer and method of use thereof
US5288161A (en) * 1992-02-14 1994-02-22 The Wooster Brush Company Quick release lock mechanisms
US6935436B1 (en) * 2003-08-01 2005-08-30 The United States Of America As Represented By The Secretary Of The Air Force Double-headed tent stake driver and puller having twin release levers
US20070024012A1 (en) * 2005-07-28 2007-02-01 Hilti Aktiengesellschaft Percussion tool chuck with a retaining stirrup
US20120038119A1 (en) * 2009-01-30 2012-02-16 Hilti Aktiengesellschaft Tool holder
US9067312B2 (en) * 2009-01-30 2015-06-30 Hilti Aktiengesellschaft Tool holder
US20110216624A1 (en) * 2010-03-04 2011-09-08 Vita-Mix Corporation Agitator release for a food mixer
US8801266B2 (en) * 2010-03-04 2014-08-12 Vita-Mix Corporation Agitator release for a food mixer
CN102922488A (zh) * 2012-10-23 2013-02-13 嘉兴大工匠机械有限公司 一种可调打钉深度的打钉机保险机构

Also Published As

Publication number Publication date
FR2237426A7 (sv) 1975-02-07
GB1382019A (en) 1975-01-29
CA1001396A (en) 1976-12-14
SE7408156L (sv) 1975-01-13
SE405328B (sv) 1978-12-04

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