US3848931A - Tool bit for vibration attenuation - Google Patents

Tool bit for vibration attenuation Download PDF

Info

Publication number
US3848931A
US3848931A US00295928A US29592872A US3848931A US 3848931 A US3848931 A US 3848931A US 00295928 A US00295928 A US 00295928A US 29592872 A US29592872 A US 29592872A US 3848931 A US3848931 A US 3848931A
Authority
US
United States
Prior art keywords
tool bit
sleeve
rigid sleeve
shank
work tip
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
US00295928A
Other languages
English (en)
Inventor
J Swisher
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.)
INT TOOL SALES
INT TOOL SALES INC US
Original Assignee
INT TOOL SALES
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 INT TOOL SALES filed Critical INT TOOL SALES
Priority to US00295928A priority Critical patent/US3848931A/en
Priority to IL42788A priority patent/IL42788A0/xx
Priority to DE19732338072 priority patent/DE2338072A1/de
Priority to ZA735103A priority patent/ZA735103B/xx
Priority to RO7375805A priority patent/RO65541A/fr
Priority to IT69487/73A priority patent/IT994632B/it
Priority to AU59625/73A priority patent/AU5962573A/en
Priority to JP48096538A priority patent/JPS4986973A/ja
Priority to NL7312025A priority patent/NL7312025A/xx
Priority to FR7331817A priority patent/FR2201952B3/fr
Priority to BE135389A priority patent/BE804545A/fr
Application granted granted Critical
Publication of US3848931A publication Critical patent/US3848931A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/36—Percussion drill bits
    • 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
    • B25D17/02—Percussive tool bits
    • 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
    • B25D17/04—Handles; Handle mountings
    • B25D17/046—Sleeve-like handles surrounding the tool bit
    • 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
    • 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
    • Y10T279/17094—Sleeve type retainer
    • Y10T279/17102—Sleeve in socket

Definitions

  • the present invention relates to the dampening of vibrations in percussion tool bits and especially to such dampening where the tool bits are utilized to penetrate into materials. Hitherto, many different approaches have been taken to attenuate the frequency response of tool bits in achieving either increased fatigue life or re- Most dampening collars have a greater outer diame- 2O ter than the tool bit and where penetration operations are performed, they limit the depth of penetration attainable. Such collars are also subjected to much physical abuse when operating at the penetration limit. To minimize the penetration limit encounter, some collars are disposed immediately adjacent that portion of the tool bit which secures into the driving unit.
  • a tool bit with such a collar is not interchangeably compatible for use with the holding provisions of all driving units.
  • the holding provisions most utilized to attain such compatibility is the conventional arrangement wherein a latch on the driving unit interlocks with an annular flange on the tool bit.
  • this interlock is only effective over a small portion of the annular flange due to the presence of the collar in the arrangement and, therefore, undistributed wear and. more limited tool life are encountered.
  • dampening collars are merely bonded to the tool bit and separate therefrom when the bond breaks under extremely abusive environments. This problem is further aggravated at the elevated temperatures encountered under some operating conditions or when the work tip of a single piece tool bit is reshaped. Furthermore, many dampening collars include compressible materials which encounter deleterious effects to their elastic properties at elevated temperatures.
  • the dampening collar from a compressible sleeve disposed around a portion of the tool bit and compressively encasing the compressible sleeve in a rigid sleeve which engages into an annular groove on the tool bit.
  • the compressible sleeve is fabricated of silicon based compounds to enhance the life expectancy of the collar where elevated temperatures are anticipated.
  • This shield is attained by configuring the work tip with a boring diameter of greater magnitude than the rigid sleeve and, therefore, the tool bit generates a clearance chamber for the collar upon penetration into materials. Hang up of the tool bit in penetrated materials is prevented by disposing a conical surface on the detachable work tip between its boring diameter and the collar.
  • FIG. 1 is a perspective view of a single piece tool bit to which the dampening collar of this invention is affixed;
  • FIG. 2 is a partial sectional view thereof, taken sub- I stantially along line 2-2 of FIG. 1 to illustrate the compressible and rigid sleeves of the dampening collar along with the groove by which the dampening collar is interlocked to the tool bit;
  • FIG. 3 is a perspective view of a two-piece tool bit to which the dampening collar of this invention is affixed.
  • FIG. 4 is a partial sectional view thereof, taken substantially along line 44 of FIG. 3 to illustrate the compressible and rigid sleeves of the dampening collar, the groove by which the dampening collar is interlocked to the shank and the configuration of the work tip.
  • FIG. 1 there is illustrated a single piece percussion tool bit 10 to which a dampening collar 12 in accordance with this invention is affixed.
  • One end of the tool bit 10 includes a hexagonal portion 14 for insertion into the tool holding provisions of a driving unit (not shown). These holding provisions generally include a latch or a spring for interlocking to an annular flange 16 on the tool bit 10.
  • a work tip 18 is disposed at the I other end of the tool bit 10 and is configured in accor The construction'of the dampening collar 12 is illustrated in FIG.
  • a compressible sleeve 22 is intimately disposed about a portion of the shaft 20 and a rigid sleeve 24 is disposed to compressibly encase the compressible sleeve 22.
  • An annular groove 26 is disposed around the shaft' 20 and one end of the rigid sleeve 24 is configured to engage therein.
  • Any material having suitable elastic properties may be used in fabrieating the compressible sleeve 22, however, ferrous oxide silicon based materials have been found to belowering the flexural response of the tool bit 10.
  • the dampening collar 12 serves to lower the flexural response thereof.
  • the compressible sleeve 22 is forced to bear against the tool bit by the rigid sleeve 24 and, therefore, must vibrate at the same frequency as the tool bit 10 or dampening will occur. Since the compressible sleeve 22 has a very low flexural response, it will not follow any high frequency vibrations propagated through the tool bit 10, so that such vibrations are dampened thereby. Therefore, the dampening collar 12 has the effect of lowering the flex- .ural response of the'tool bit 10.
  • the dampening effect achieved by the dampening collar 12 depends on'numerous factors and many combinations of these factors can be utilized to accomplish the particular dampening effect desired. Therefore, it would only confuse the matter to discuss any particular combination. Once a combination is determined however, the dampening collar 12 is of maximum effectiveness only so long as it remains affixed to the tool bit 10 at a precise location and the elastic properties of the compressible sleeve 22 do not deteriorate. Permanent affixment of the dampening collar 12 on the tool bit 10 is assured by the engagement of the rigid sleeve 24 into the annular groove 26 which creates an interlock therebetween.
  • the primary cause of elastic deteriorationin the dampening collar 12 is elevated temperatures and, therefore, ferrous oxide silicon based materials which present stable elastic properties at very high temperatures are used for the compressible sleeve 22.
  • the dampening collar 12 of this invention can be applied to a two piece percussion tool bit 30 having a shank 32 and a detachable work tip 34.
  • the shank 32 includes both a hexagonal portion 36 for insertion into the tool holding provisions of the driving unit (not shown) and an annular flange 38 for interlocking therewith.
  • the other end of the shank 32 is specially contoured to retain the detachable work tip 34 through an interference fit therewith.
  • the exterior of the detachable work tip 34 is configured to perform a penetration operation, however, it could be configured to perform many other operations, such as tamping or riveting.
  • FIG. 4 Construction of the dampening Collar 12 on the twopiece tool bit 30 is essentially identical to that described previously for the single piece tool bit 10. This construction is illustrated in FIG. 4 where the identical reference numerals are used to designate the dampening collar 12 and its parts as were used in FIG. 2.
  • the compressible sleeve 22 is intimately disposed about a portion of the shank 32 with the rigid sleeve 24 disposed to compressibly encase the compressible sleeve 22.
  • An annular groove 40 is disposed around the shank 32 and one end of the rigid sleeve 24 is configured to engage therein.
  • the detachable work tip 34 of the tool bit 30 is configured to have a boring diameter X of greater magnitude than the outer diameter of the rigid sleeve 24.
  • a conical surface 42 is disposed on the work tip 34 between the boring diameter X and the dampening collar 12, with the taper of the conical surface 42 decreasing in the direction of the dampening collar 12.
  • the dampening collar 12 on the shank 32 lowers the flexural response of the two-piece tool bit 30 and maintains its maximum effectiveness in the exact same manner as was discussed previously for the single piece tool bit 10.
  • the boring diameter X of the detachable work tip 34 creates a clearance channel for the rigid sleeve 24 as the tool bit 30 penetrates into a material. Because of this clearance channel, the dampening collar 12 can follow the work tip 34 into penetrated materials without limiting the depth of penetration. Also, the dampening collar 12 is shielded from physical abuse due to theclearance provided.
  • the conical surface 42 serves to reduce the stepped overhang of the detachable work tip 34 relative to the dampening collar 12 and, therefore, is effective in minimizing hang up between the work tip 34 and penetrated materials. As hang up is minimized, withdrawal of the tool bit 30 after penetration is facilitated and inadvertent removal of the detachable work tip 34 during penetration is avoided.
  • the clearance channel and reduction in the stepped overhang will still be accomplished to some degree where these parts are separated by a significant distance.
  • the conical surface 42 may be tapered to a minimum periphery of no greater diameter thanthe outer diameter of the rigid sleeve 24 to eliminate the stepped overhang.
  • dampening collar embodied by this invention may be applied to any percussion tool bit for lowering the flexural response thereof with maximum effectiveness.
  • a special configuration can be applied thereto for shielding the dampening collar from damage during penetration operations and eliminating the penetration limitation otherwise encountered.
  • a conical surface can be included on the detachable work tip to avoid its inadvertent removal during penetration and to facilitate its withdrawal after penetration.
  • a percussion tool bit for attenuating operational vibrations comprising:
  • a rigid sleeve disposed to compressibly encase said compressible sleeve, said rigid sleeve being configured for engagement into said groove on said shank to interlock therewith;
  • said work tip is configured to perform penetrating operations and includes a conical surface, said conical surface being oriented to present a decreasing taper in the direction of said rigid sleeve to reduce hang up of said work tip in penetrated materials.
  • said work tip is configured to perform penetrating operations and includes a conical surface and a boring diameter, said boring diameter being of greater magnitude than the outer diameter of said rigid sleeve to create a clearance channel for said rigid sleeve during penetration, said conical surface being oriented to present a decreasing taper from said boring diameter in the direction of said rigid sleeve to reduce hang up of said work tip in pene- LII trated materials.
  • a vibration dampening collar for a percussion tool bit comprising:
  • a compressible sleeve configured to fit about a portion of the tool bit in intimate contact therewith
  • a rigid sleeve disposed to encase said compressible sleeve, said rigid sleeve being configured to compress said compressible sleeve on the tool bit and having an interlocking portion thereon for engagement into a groove on the tool bit.
  • a percussion tool bit for attenuating operational vibrations comprising:
  • a work tip detachably affixed to one end of said shank, said work tip being configured to perform penetrating operations and including a boring diameter of greater magnitude than the outer diameter of said rigid sleeve, said boring diameter being effective to create a clearance channel for said rigid sleeve during penetration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Earth Drilling (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Drilling Tools (AREA)
  • Vibration Prevention Devices (AREA)
US00295928A 1972-10-10 1972-10-10 Tool bit for vibration attenuation Expired - Lifetime US3848931A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
US00295928A US3848931A (en) 1972-10-10 1972-10-10 Tool bit for vibration attenuation
IL42788A IL42788A0 (en) 1972-10-10 1973-07-19 Tool bit for vibration attenuation
DE19732338072 DE2338072A1 (de) 1972-10-10 1973-07-26 Meisseleinsatz zur vibrationsabschwaechung
ZA735103A ZA735103B (en) 1972-10-10 1973-07-26 Tool bit for vibration attenuation
RO7375805A RO65541A (fr) 1972-10-10 1973-08-15 Port-outile percutante antivibrateur
IT69487/73A IT994632B (it) 1972-10-10 1973-08-21 Utensile a punta azionabile a percussione atto ad attenuare le vibrazioni durante l impiego
AU59625/73A AU5962573A (en) 1972-10-10 1973-08-24 Tool bit for vibration attenuation
JP48096538A JPS4986973A (fr) 1972-10-10 1973-08-28
NL7312025A NL7312025A (fr) 1972-10-10 1973-08-31
FR7331817A FR2201952B3 (fr) 1972-10-10 1973-09-04
BE135389A BE804545A (fr) 1972-10-10 1973-09-06 Fleuret d'outil a percussion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00295928A US3848931A (en) 1972-10-10 1972-10-10 Tool bit for vibration attenuation

Publications (1)

Publication Number Publication Date
US3848931A true US3848931A (en) 1974-11-19

Family

ID=23139823

Family Applications (1)

Application Number Title Priority Date Filing Date
US00295928A Expired - Lifetime US3848931A (en) 1972-10-10 1972-10-10 Tool bit for vibration attenuation

Country Status (11)

Country Link
US (1) US3848931A (fr)
JP (1) JPS4986973A (fr)
AU (1) AU5962573A (fr)
BE (1) BE804545A (fr)
DE (1) DE2338072A1 (fr)
FR (1) FR2201952B3 (fr)
IL (1) IL42788A0 (fr)
IT (1) IT994632B (fr)
NL (1) NL7312025A (fr)
RO (1) RO65541A (fr)
ZA (1) ZA735103B (fr)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918530A (en) * 1972-11-22 1975-11-11 Atlas Copco Ab Eccentric element for silencing tool and method
US4044845A (en) * 1975-03-03 1977-08-30 Hilti Aktiengesellschaft Drilling tool with a two part input unit
US4068742A (en) * 1976-02-04 1978-01-17 Atlas Copco Aktiebolag Vibration damper for impact tool
US4086984A (en) * 1975-10-09 1978-05-02 Atlas Copco Aktiebolag Vibration damper for impact tool
US4168754A (en) * 1976-05-07 1979-09-25 Nyholm Bengt V Impact tool
US4310055A (en) * 1978-10-10 1982-01-12 Robert Bosch Gmbh Percussion hammer with a one piece striker
US4336848A (en) * 1978-10-10 1982-06-29 Robert Bosch Gmbh Tool holder for impact device
US4591009A (en) * 1983-10-24 1986-05-27 Charbonnages De France Drill soundproofing device
WO1993025065A1 (fr) * 1992-06-15 1993-12-23 Kennametal Inc. Pointe de penetration dans le sol, a bossage et a faces triangulaires
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
US20080025805A1 (en) * 2004-05-07 2008-01-31 Peter Mihic Tool Holder with Vibration Damping Means and a Method for Manufacturing the Same
US20080145162A1 (en) * 2004-02-03 2008-06-19 Peter Mihic Vibration-Damped Tool Holder
CN100423906C (zh) * 2006-08-22 2008-10-08 朱清明 电锤用冲击凿
US20100143051A1 (en) * 2007-03-23 2010-06-10 Guehring Ohg Ball raceway milling device, tool having a ball raceway milling device, and method for the application of a ball raceway milling device
US20110217185A1 (en) * 2010-03-08 2011-09-08 Trane International Inc. System and Method For Reducing Compressor Noise
US20110283985A1 (en) * 2010-05-20 2011-11-24 Valerio Michael P Demolition bit with bounce back bit extractor
US20130236254A1 (en) * 2010-11-29 2013-09-12 Techspace Aero S.A. Two-material one-piece cutting tool
US20130259584A1 (en) * 2010-12-28 2013-10-03 Korea Basic Science Institute Long shaft bit having vibration preventing structure
US20140105701A1 (en) * 2011-07-15 2014-04-17 Kazuya Matano Anti-vibration member and cutting tool
US20180036851A1 (en) * 2015-02-27 2018-02-08 Rattunde & Co Gmbh Method for Reducing the Regenerative Chatter of Chip-Removal Machines
US20190299384A1 (en) * 2018-03-31 2019-10-03 David Matherson Tool bit to be used with pneumatic air hammer
US11448015B2 (en) * 2018-03-15 2022-09-20 Baker Hughes, A Ge Company, Llc Dampers for mitigation of downhole tool vibrations
US11519227B2 (en) 2019-09-12 2022-12-06 Baker Hughes Oilfield Operations Llc Vibration isolating coupler for reducing high frequency torsional vibrations in a drill string
US11603714B2 (en) 2019-09-12 2023-03-14 Baker Hughes Oilfield Operations Llc Vibration isolating coupler for reducing vibrations in a drill string
US12084924B2 (en) 2018-03-15 2024-09-10 Baker Hughes, A Ge Company, Llc Dampers for mitigation of downhole tool vibrations and vibration isolation device for downhole bottom hole assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1525145A (en) * 1975-10-09 1978-09-20 Atlas Copco Ab Vibration-damped impact tool
DE2851160A1 (de) * 1978-11-25 1980-06-04 Wacker Werke Kg Vorrichtung zum mindern der geraeuschentwicklung an den werkzeugen von bohr- und aufbruchhaemmern
DE3809558A1 (de) * 1988-03-22 1989-10-12 Hauptverband Der Gewerblichen Daempfungseinrichtung zur reduktion der uebertragung der von vibrierenden geraeten erzeugten schwingungen auf das hand-arm-system
DE20021233U1 (de) * 2000-12-15 2002-04-25 Weha - Ludwig Werwein GmbH, 86343 Königsbrunn Meißel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2043442A (en) * 1935-03-21 1936-06-09 James E Mcneil Tool holder
US2997024A (en) * 1960-01-13 1961-08-22 Lord Mfg Co Rock drill collar
US3655244A (en) * 1970-07-30 1972-04-11 Int Tool Sales Impact driven tool with replaceable cutting point
US3662855A (en) * 1970-05-04 1972-05-16 Robert D Adams Muffled tool for vibratory or impact machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2043442A (en) * 1935-03-21 1936-06-09 James E Mcneil Tool holder
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
US3655244A (en) * 1970-07-30 1972-04-11 Int Tool Sales Impact driven tool with replaceable cutting point

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918530A (en) * 1972-11-22 1975-11-11 Atlas Copco Ab Eccentric element for silencing tool and method
US4044845A (en) * 1975-03-03 1977-08-30 Hilti Aktiengesellschaft Drilling tool with a two part input unit
US4086984A (en) * 1975-10-09 1978-05-02 Atlas Copco Aktiebolag Vibration damper for impact tool
US4068742A (en) * 1976-02-04 1978-01-17 Atlas Copco Aktiebolag Vibration damper for impact tool
US4168754A (en) * 1976-05-07 1979-09-25 Nyholm Bengt V Impact tool
US4310055A (en) * 1978-10-10 1982-01-12 Robert Bosch Gmbh Percussion hammer with a one piece striker
US4336848A (en) * 1978-10-10 1982-06-29 Robert Bosch Gmbh Tool holder for impact device
US4591009A (en) * 1983-10-24 1986-05-27 Charbonnages De France Drill soundproofing device
WO1993025065A1 (fr) * 1992-06-15 1993-12-23 Kennametal Inc. Pointe de penetration dans le sol, a bossage et a faces triangulaires
US5314029A (en) * 1992-06-15 1994-05-24 Kennametal Inc. Pyramidal shaped, hardened insert for an agricultural tool
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
US20080145162A1 (en) * 2004-02-03 2008-06-19 Peter Mihic Vibration-Damped Tool Holder
US8020474B2 (en) * 2004-02-03 2011-09-20 Microna Ab Vibration-damped tool holder
US20080025805A1 (en) * 2004-05-07 2008-01-31 Peter Mihic Tool Holder with Vibration Damping Means and a Method for Manufacturing the Same
US8240961B2 (en) * 2004-05-07 2012-08-14 Mircona Ab Tool holder with vibration damping means and a method for manufacturing the same
CN100423906C (zh) * 2006-08-22 2008-10-08 朱清明 电锤用冲击凿
US20100143051A1 (en) * 2007-03-23 2010-06-10 Guehring Ohg Ball raceway milling device, tool having a ball raceway milling device, and method for the application of a ball raceway milling device
US20110217185A1 (en) * 2010-03-08 2011-09-08 Trane International Inc. System and Method For Reducing Compressor Noise
US8616860B2 (en) * 2010-03-08 2013-12-31 Trane International Inc. System and method for reducing compressor noise
US20110283985A1 (en) * 2010-05-20 2011-11-24 Valerio Michael P Demolition bit with bounce back bit extractor
US20130236254A1 (en) * 2010-11-29 2013-09-12 Techspace Aero S.A. Two-material one-piece cutting tool
US20130259584A1 (en) * 2010-12-28 2013-10-03 Korea Basic Science Institute Long shaft bit having vibration preventing structure
US8978527B2 (en) * 2010-12-28 2015-03-17 Korea Basic Science Institute Long shaft bit having vibration preventing structure
US20140105701A1 (en) * 2011-07-15 2014-04-17 Kazuya Matano Anti-vibration member and cutting tool
US20180036851A1 (en) * 2015-02-27 2018-02-08 Rattunde & Co Gmbh Method for Reducing the Regenerative Chatter of Chip-Removal Machines
US10562143B2 (en) * 2015-02-27 2020-02-18 Rattunde Ag Method for reducing the regenerative chatter of chip-removal machines
US11448015B2 (en) * 2018-03-15 2022-09-20 Baker Hughes, A Ge Company, Llc Dampers for mitigation of downhole tool vibrations
US12084924B2 (en) 2018-03-15 2024-09-10 Baker Hughes, A Ge Company, Llc Dampers for mitigation of downhole tool vibrations and vibration isolation device for downhole bottom hole assembly
US20190299384A1 (en) * 2018-03-31 2019-10-03 David Matherson Tool bit to be used with pneumatic air hammer
US11519227B2 (en) 2019-09-12 2022-12-06 Baker Hughes Oilfield Operations Llc Vibration isolating coupler for reducing high frequency torsional vibrations in a drill string
US11603714B2 (en) 2019-09-12 2023-03-14 Baker Hughes Oilfield Operations Llc Vibration isolating coupler for reducing vibrations in a drill string
US11692404B2 (en) 2019-09-12 2023-07-04 Baker Hughes Oilfield Operations Llc Optimized placement of vibration damper tools through mode-shape tuning

Also Published As

Publication number Publication date
AU5962573A (en) 1975-02-27
RO65541A (fr) 1980-01-15
JPS4986973A (fr) 1974-08-20
NL7312025A (fr) 1974-04-16
FR2201952B3 (fr) 1976-08-06
IL42788A0 (en) 1973-10-25
IT994632B (it) 1975-10-20
FR2201952A1 (fr) 1974-05-03
BE804545A (fr) 1974-01-02
DE2338072A1 (de) 1974-04-18
ZA735103B (en) 1974-07-31

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