Fluid operated drilling device and a method for drilling a hole using a fluid operated drilling device
Number of patents in Portfolio can not be more than 2000
United States of America
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Apr 19, 2022
Grant Date -
Nov 5, 2020
app pub date -
Aug 30, 2018
filing date -
Aug 30, 2018
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A fluid operated drilling device for drilling a hole said device having a hammer, a rotation device and a drill rod. The hammer includes a tubular main body, a back head, a cylindrical piston housing, a reciprocating piston, a space, a valve unit and a fluid pressure supply unit. A hollow portion of the piston is open to lead pressurized operating fluid directly to the hollow portion from the fluid pressure supply passage. The hammer includes an axial exhaust passage formed between the main body and the piston housing. The valve unit includes a valve exhaust passage and the piston has a lower part and an upper part detachably connected to each other. The invention also relates to a method for drilling a hole using the fluid operated drilling device.
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