US3856107A - Tools for use in percussive machines - Google Patents

Tools for use in percussive machines Download PDF

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Publication number
US3856107A
US3856107A US00105588A US10558871A US3856107A US 3856107 A US3856107 A US 3856107A US 00105588 A US00105588 A US 00105588A US 10558871 A US10558871 A US 10558871A US 3856107 A US3856107 A US 3856107A
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US
United States
Prior art keywords
stem
steel
collar
tool
rib
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
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US00105588A
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English (en)
Inventor
R Rabett
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Individual
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Individual
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Filing date
Publication date
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Publication of US3856107A publication Critical patent/US3856107A/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
    • B25D17/11—Arrangements of noise-damping 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
    • Y10S173/00—Tool driving or impacting
    • Y10S173/02—Sound muffling

Definitions

  • the steel is secured in a percussive machine -for the free end of its shank to be repeatedly impacted by a reciprocating hammer device.
  • a percussive machine is usually (but not necessarily) pneumati cally driven as, for example, in the well known handheld pneumatic road drill.
  • a considerable problem encountered with percussive machines is that during their use to drive a steel, a large amount of noise is emitted, the sound level of which'frequently approaches the threshold of pain'for the human ear. It has hitherto been proposed to reduce the noise level of percussive machines by substantially enclosing ormufiling the machine in a bag of sound absorbing material or with a layer of vibration. absorbing material as, for example, disclosed in British Pat.
  • the rib is preferably peripherally formed around and integral-with the stem, for example during forging of the steel andthe collar is preferably formed of substantially complementary shape to the rib to provide an efficient interference fit therewith.
  • the collar can be formed in two or more provided on the steel at a position between the stem I and shank, or when'the collar is to be secured on a rib.
  • the collar parts can be assembled and secured around the stem, for example when the collar comprises a mass of resilient material, by shrinking or swaging a metallic sleeve around the assembled parts to urge them into engagement with the stem (or the recess or rib provided thereon).
  • the mid-length position of the steel is located on the stem andsubstantially at said position the stem has secured thereto a collar the mass of which is sufficient to inhibit the primary mode of transverse vibration of the steel.
  • the collar may comprise a mass of resilient material secured to the stem which material may be additionally weighted by having high density, preferably particulate, material (such as lead shot) embedded in it.
  • the collar may comprise a sleeve of high density material such as steel resiliently mounted on the stem.
  • the stem may be provided with a recess or rib with which the collar engages as an interference fit to inhibit its longitudinal movement on the stem.
  • recess is preferably peripherally formed around the stem and the length of the collar may be partly or transverse vibration (or the lower frequency mode of inhibited.
  • the weighting of the steel at the 1 'mid-part of its length may also, to some extent,.mute
  • the collar may provide a shielding effect to diminish the efficiency of the radiation of noise reason for this being that the collar dissipates energy of vibration of thesteel prior to such vibration reaching the external peripheral surface of the collar.
  • FIG. 1 shows a conventional steel having secured thereto .
  • a collar shown in longitudinal section located in a peripheral recess of the stem and. of sufficient weight to inhibit the primary mode of transverse vibra* 'tion of the steel;
  • the steel comprises a bar (of the material steel) which is of polygonal or circular shape in transverse section and which is forged to provide a shank 1, a stem 2 and a chisel working head 3.
  • a transversely extending flange 4 is forged at the junction of the stem and shank.
  • the steel is secured in a percussive machine (not shown) by the shank l engaging in a complementary socket of the machine so that the free end of the shank may be impacted by a reciprocating hammer.
  • the steel is generally retained in engagement with the socket by a spring member of the machine engaging over the flange 4 in a known manner.
  • the stem 2 has a shallow peripheral recess 5 (conventiently formed during the forging of the steel) which is' located to extend longitudinally in the mid-length part of the steel.
  • a collar 6 comprising an annular block 7 of resilient material (in the present example a molded rubber element) and a rigid sleeve 8 of, for example, steel. the sleeve. 8 is swaged to compress the annular block 7 against the stem 2 and deform it into the recess,
  • the stem 2 has a transverselyextendingperipheral rib 10 which is located at the mid-length position of the steel and is conveniently formed during forging of the steel (in a similar manner to the flange 4).
  • the collar 6 Located around the stem 2 to overlie the rib 10 and adjacent part'lengths of the stem is the collar 6 which comprises a two-part structure of resilient material retained on the stem by a steel sleeve 11.
  • the two-part structure of the sleeve comprises two molded rubber elements 12 and 13 which are identical in shape and are each molded (as shown in FIG.
  • Both elements l2-and 13 are assembled on the stem 2 to encircle the rib 10 (see FIG. 3) and,
  • the elements l2 and 13 are conveniently bonded together and thereafter the steel-sleeve 11' is swaged on to the elements to urge them into close contact with the shank.
  • the elements 12 and 13 and sleeve 11 sufficiently weight the steel at its mid-length position to inhibit the primary mode of transverse vibration of the steel.
  • a percussion tool assembly comprising:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Forging (AREA)
US00105588A 1970-01-21 1971-01-11 Tools for use in percussive machines Expired - Lifetime US3856107A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2957/70A GB1291781A (en) 1970-01-21 1970-01-21 Improvements in or relating to tools for use in percussive machines

Publications (1)

Publication Number Publication Date
US3856107A true US3856107A (en) 1974-12-24

Family

ID=9749226

Family Applications (1)

Application Number Title Priority Date Filing Date
US00105588A Expired - Lifetime US3856107A (en) 1970-01-21 1971-01-11 Tools for use in percussive machines

Country Status (7)

Country Link
US (1) US3856107A (cg-RX-API-DMAC7.html)
AU (1) AU2446271A (cg-RX-API-DMAC7.html)
CA (1) CA979815A (cg-RX-API-DMAC7.html)
DE (1) DE2102819A1 (cg-RX-API-DMAC7.html)
FR (1) FR2075740A5 (cg-RX-API-DMAC7.html)
GB (1) GB1291781A (cg-RX-API-DMAC7.html)
ZA (1) ZA71138B (cg-RX-API-DMAC7.html)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030553A (en) * 1975-06-23 1977-06-21 Rockwell Thomas H Percussion tool with noise reducing characteristics and method of making
US4086984A (en) * 1975-10-09 1978-05-02 Atlas Copco Aktiebolag Vibration damper for impact tool
US4385665A (en) * 1979-10-23 1983-05-31 Fritz Knoll Kinetic energy absorber
US5020978A (en) * 1989-11-30 1991-06-04 Nashif Ahid D Apparatus and method for reducing vehicular fuel pump noise
USH1317H (en) 1990-10-03 1994-06-07 The United States Of America As Represented By The Secretary Of The Navy Ring damper for structureborne noise suppression in piping systems
US6412586B1 (en) * 1999-05-27 2002-07-02 International Truck Intellectual Property Company, L.L.C. Toroidal exhaust vibration absorber
US20030026669A1 (en) * 2001-07-06 2003-02-06 Marco Lang Chisel
US20050097708A1 (en) * 2003-11-08 2005-05-12 Crawford Bruce A. Shock-absorbing handle for impact tool
US20050103508A1 (en) * 2003-11-17 2005-05-19 Atkinson Glyn R. Powered tool
US20080283263A1 (en) * 2007-05-15 2008-11-20 Hsin Fa Kang Air tool
US20110080036A1 (en) * 2007-05-15 2011-04-07 Schlumberger Technology Corporation Spring Loaded Pick
USD637629S1 (en) * 2010-06-28 2011-05-10 Alex Clark Chisel tool for demolition hammer
USD642204S1 (en) * 2010-06-28 2011-07-26 Alex Clark Point tool for a demolition hammer
USD648356S1 (en) * 2010-09-17 2011-11-08 Alex Clark Broad faced chisel tool for a demolition hammer
US20110283985A1 (en) * 2010-05-20 2011-11-24 Valerio Michael P Demolition bit with bounce back bit extractor
US20130206525A1 (en) * 2010-09-10 2013-08-15 Daishowa Seiki Kabushiki Kaisha Vibration damping mechanism
US8689930B2 (en) * 2012-03-29 2014-04-08 Westerngeco L.L.C. Seismic vibrator having airwave suppression
US20140105701A1 (en) * 2011-07-15 2014-04-17 Kazuya Matano Anti-vibration member and cutting tool
EP3159085A1 (de) * 2015-10-19 2017-04-26 HILTI Aktiengesellschaft Werkzeug und herstellungsverfahren
US20190299384A1 (en) * 2018-03-31 2019-10-03 David Matherson Tool bit to be used with pneumatic air hammer

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US395700A (en) * 1889-01-08 Hand-guard for rock-drills
US931671A (en) * 1908-10-16 1909-08-17 Gustav Bank Shock-absorber.
US1362657A (en) * 1919-10-04 1920-12-21 Whyte William Sidney Tool-holder
GB166867A (en) * 1921-05-23 1921-07-28 John Joseph Rawlings An improved percussion tool
US1477855A (en) * 1922-04-18 1923-12-18 Fred W Thurston Drill
GB332914A (en) * 1929-04-12 1930-07-14 Johannesburg Cons Invest Compa Improvements in or relating to drill steels
DE895729C (de) * 1951-01-03 1953-11-05 Rudolf Hausherr & Soehne Masch Meissel od. dgl. fuer Presslufthaemmer mit einem den Meissel im Hammergehaeuse haltenden Bund
FR1119025A (fr) * 1954-11-08 1956-06-14 Rudolf Hausherr & Sohne G M B Pic ou analogue pour marteaux à air comprimé
FR1157386A (fr) * 1956-08-10 1958-05-29 Electro Chimie Soc D Nouveau mode d'emmanchement des outils de percussion
US2997024A (en) * 1960-01-13 1961-08-22 Lord Mfg Co Rock drill collar
US3662855A (en) * 1970-05-04 1972-05-16 Robert D Adams Muffled tool for vibratory or impact machines

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US395700A (en) * 1889-01-08 Hand-guard for rock-drills
US931671A (en) * 1908-10-16 1909-08-17 Gustav Bank Shock-absorber.
US1362657A (en) * 1919-10-04 1920-12-21 Whyte William Sidney Tool-holder
GB166867A (en) * 1921-05-23 1921-07-28 John Joseph Rawlings An improved percussion tool
US1477855A (en) * 1922-04-18 1923-12-18 Fred W Thurston Drill
GB332914A (en) * 1929-04-12 1930-07-14 Johannesburg Cons Invest Compa Improvements in or relating to drill steels
DE895729C (de) * 1951-01-03 1953-11-05 Rudolf Hausherr & Soehne Masch Meissel od. dgl. fuer Presslufthaemmer mit einem den Meissel im Hammergehaeuse haltenden Bund
FR1119025A (fr) * 1954-11-08 1956-06-14 Rudolf Hausherr & Sohne G M B Pic ou analogue pour marteaux à air comprimé
FR1157386A (fr) * 1956-08-10 1958-05-29 Electro Chimie Soc D Nouveau mode d'emmanchement des outils de percussion
US2997024A (en) * 1960-01-13 1961-08-22 Lord Mfg Co Rock drill collar
US3662855A (en) * 1970-05-04 1972-05-16 Robert D Adams Muffled tool for vibratory or impact machines

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030553A (en) * 1975-06-23 1977-06-21 Rockwell Thomas H Percussion tool with noise reducing characteristics and method of making
US4086984A (en) * 1975-10-09 1978-05-02 Atlas Copco Aktiebolag Vibration damper for impact tool
US4385665A (en) * 1979-10-23 1983-05-31 Fritz Knoll Kinetic energy absorber
US5020978A (en) * 1989-11-30 1991-06-04 Nashif Ahid D Apparatus and method for reducing vehicular fuel pump noise
USH1317H (en) 1990-10-03 1994-06-07 The United States Of America As Represented By The Secretary Of The Navy Ring damper for structureborne noise suppression in piping systems
US6412586B1 (en) * 1999-05-27 2002-07-02 International Truck Intellectual Property Company, L.L.C. Toroidal exhaust vibration absorber
US20030026669A1 (en) * 2001-07-06 2003-02-06 Marco Lang Chisel
US8215415B2 (en) * 2001-07-06 2012-07-10 Hawera Probst Gmbh Chisel
US20050097708A1 (en) * 2003-11-08 2005-05-12 Crawford Bruce A. Shock-absorbing handle for impact tool
US20050103508A1 (en) * 2003-11-17 2005-05-19 Atkinson Glyn R. Powered tool
US7013984B2 (en) * 2003-11-17 2006-03-21 Standall Tools Limited Powered tool
EP1533085B1 (en) * 2003-11-17 2010-04-14 Standall Tools Limited Method for providing a tool for a powered machine
US20110080036A1 (en) * 2007-05-15 2011-04-07 Schlumberger Technology Corporation Spring Loaded Pick
US20080283263A1 (en) * 2007-05-15 2008-11-20 Hsin Fa Kang Air tool
US8342611B2 (en) * 2007-05-15 2013-01-01 Schlumberger Technology Corporation Spring loaded pick
US20110283985A1 (en) * 2010-05-20 2011-11-24 Valerio Michael P Demolition bit with bounce back bit extractor
USD637629S1 (en) * 2010-06-28 2011-05-10 Alex Clark Chisel tool for demolition hammer
USD642204S1 (en) * 2010-06-28 2011-07-26 Alex Clark Point tool for a demolition hammer
US20130206525A1 (en) * 2010-09-10 2013-08-15 Daishowa Seiki Kabushiki Kaisha Vibration damping mechanism
US9027720B2 (en) * 2010-09-10 2015-05-12 Daishowa Seiki Kabushiki Kaisha Vibration damping mechanism
USD648356S1 (en) * 2010-09-17 2011-11-08 Alex Clark Broad faced chisel tool for a demolition hammer
US20140105701A1 (en) * 2011-07-15 2014-04-17 Kazuya Matano Anti-vibration member and cutting tool
US8689930B2 (en) * 2012-03-29 2014-04-08 Westerngeco L.L.C. Seismic vibrator having airwave suppression
EP3159085A1 (de) * 2015-10-19 2017-04-26 HILTI Aktiengesellschaft Werkzeug und herstellungsverfahren
US20190299384A1 (en) * 2018-03-31 2019-10-03 David Matherson Tool bit to be used with pneumatic air hammer

Also Published As

Publication number Publication date
ZA71138B (en) 1971-10-27
CA979815A (en) 1975-12-16
FR2075740A5 (cg-RX-API-DMAC7.html) 1971-10-08
DE2102819A1 (de) 1971-07-22
AU2446271A (en) 1972-07-27
GB1291781A (en) 1972-10-04

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