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AU440842B2 - Improvements in or relating toa percussion mechanism - Google Patents
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AU440842B2 - Improvements in or relating toa percussion mechanism - Google Patents

Improvements in or relating toa percussion mechanism

Info

Publication number
AU440842B2
AU440842B2 AU25771/71A AU2577171A AU440842B2 AU 440842 B2 AU440842 B2 AU 440842B2 AU 25771/71 A AU25771/71 A AU 25771/71A AU 2577171 A AU2577171 A AU 2577171A AU 440842 B2 AU440842 B2 AU 440842B2
Authority
AU
Australia
Prior art keywords
percussion mechanism
relating toa
toa
relating
percussion
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
Application number
AU25771/71A
Other versions
AU2577171A (en
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 filed Critical
Publication of AU2577171A publication Critical patent/AU2577171A/en
Application granted granted Critical
Publication of AU440842B2 publication Critical patent/AU440842B2/en
Expired legal-status Critical Current

Links

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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers
    • 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
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/06—Down-hole impacting means, e.g. hammers
    • E21B4/14—Fluid operated hammers
    • E21B4/145—Fluid operated hammers of the self propelled-type, e.g. with a reverse mode to retract the device from the hole

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Percussive Tools And Related Accessories (AREA)
AU25771/71A 1971-02-10 1971-02-23 Improvements in or relating toa percussion mechanism Expired AU440842B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11411571A 1971-02-10 1971-02-10

Publications (2)

Publication Number Publication Date
AU2577171A AU2577171A (en) 1972-08-24
AU440842B2 true AU440842B2 (en) 1973-09-17

Family

ID=22353427

Family Applications (1)

Application Number Title Priority Date Filing Date
AU25771/71A Expired AU440842B2 (en) 1971-02-10 1971-02-23 Improvements in or relating toa percussion mechanism

Country Status (2)

Country Link
US (1) US3732936A (en)
AU (1) AU440842B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261249A (en) * 1978-09-08 1981-04-14 Joy Manufacturing Company Hammer
WO2002044511A1 (en) * 2000-12-02 2002-06-06 Tracto-Technik Gmbh Pneumatic rock-boring device and method for starting such a device
US7588660B2 (en) * 2002-10-07 2009-09-15 Georgia-Pacific Consumer Products Lp Wet-pressed tissue and towel products with elevated CD stretch and low tensile ratios made with a high solids fabric crepe process

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US803877A (en) * 1903-06-15 1905-11-07 Joseph H Champ Implement for imparting vibratory impacts.
US1440082A (en) * 1918-10-05 1922-12-26 Babcock & Wilcox Co Fluid-actuated hammer
US2001190A (en) * 1932-12-05 1935-05-14 Aro Equipment Corp Nonsticking pneumatic hammer grease gun

Also Published As

Publication number Publication date
AU2577171A (en) 1972-08-24
US3732936A (en) 1973-05-15

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