Pressurized fluid flow system having multiple work chambers for a DTH hammer and normal circulation hammer thereof
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United States of America Patent
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Nov 16, 2021
Grant Date -
Nov 26, 2020
app pub date -
Dec 13, 2017
filing date -
Dec 13, 2017
priority date (Note) -
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Abstract
A pressurized fluid flow system for a down the hole drill hammer has main and auxiliary chambers that exert work on the piston. The auxiliary chambers are formed around respective waists on the piston and externally delimited by respective cylinders which are arranged longitudinally in series. A set of supply chambers filled with the pressurized fluid are defined by annular recesses in the external surface of the piston for supplying said fluid to the chambers. Supply channels and discharge channels are formed in between the outer casing and the cylinders for respectively supply pressurized fluid through exit ports in the cylinders to the supply chambers and emptying the chambers through discharge ports in the cylinders. The supply and discharge of the chambers is controlled in a cooperative way by the piston and the cylinders. A normal circulation drill hammers is provided having this system.
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