US Patent 7520341 Drill head assembly
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Patent abstract
A drill housing rotatably supports a shaft having an internal cavity for receiving a drilling device, such as a drill steel, bolt driver, and rock anchor adaptor. The upper end of the housing is closed by a cover plate and a flinger having an opening for receiving pressurized fluid and a passageway for transporting the pressurized fluid into the shaft. The pressurized fluid axially displaces a collet mounted within the shaft against the bias of a spring to frictionally engage the drilling device to transmit rotation thereto.
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US Patent 07520341 Drill head assembly US Patent 7520341 Drill head assembly
Infobox
Patent Number
0752034100
Patent Number
752034100
Edits on 6 Apr, 2023
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
075203410
Date of Patent
April 21, 2009
0Patent Application Number
119041720
Date Filed
September 26, 2007
0Official Website
Patent Primary Examiner
Edits on 26 Sep, 2022
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
075203410
Date of Patent
April 21, 2009
0Patent Application Number
119041720
Date Filed
September 26, 2007
0Official Website
Patent Primary Examiner
Edits on 15 Jun, 2022
Golden AI
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US Patent 07520341 Drill head assembly
Infobox
Is a
Patent jurisdiction
Patent number
07520341
Date of patent
April 21, 2009
Patent application number
11904172
Date Filed
September 26, 2007
Patent primary examiner
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