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Class Information
Number: 173/135
Name: Tool driving or impacting > Impacting devices (e.g., hammers) > Hammer head constitutes piston of drive motor > Motive fluid applied to striking face
Description: Apparatus in which fluid motive material is applied to cause movement of the element, upon the surface of the element that strikes the blow.










Sub-classes under this class:

Class Number Class Name Patents
173/137 Reduced area striking face 35
173/136 Supplied through passage in striking face 42


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8613327 Fluid powered percussion tool Dec. 24, 2013
8453756 Rock drilling equipment and a method in association with same Jun. 4, 2013
8196676 Recoilless hammer Jun. 12, 2012
8151900 Percussion equipment driven by a pressurized incompressible fluid Apr. 10, 2012
8069928 Percussion device, drilling machine including such a percussion device and method for controlling such a percussion device Dec. 6, 2011
8033343 Water powered impulsive unit Oct. 11, 2011
8028772 Internally dampened percussion rock drill Oct. 4, 2011
8006776 Sliding pressure control valve for pneumatic hammer drill Aug. 30, 2011
7926690 Combustion powered driver Apr. 19, 2011
7484570 Percussion device Feb. 3, 2009
7410010 Hydraulic impact mechanism Aug. 12, 2008
7392855 Vibratory pile driving systems and methods Jul. 1, 2008
7306047 Impact hammer drill Dec. 11, 2007
7156190 Impact tool Jan. 2, 2007
7117779 Driver for power tools Oct. 10, 2006
6994175 Hydraulic drill string Feb. 7, 2006
6988564 Diesel hammer systems and methods Jan. 24, 2006
6896071 Drive systems and methods for sheet piles May. 24, 2005
6889777 Implement for driving posts May. 10, 2005
6877569 Method for controlling operating cycle of impact device, and impact device Apr. 12, 2005
6736218 Diesel hammer systems and methods May. 18, 2004
6702045 Drilling apparatus Mar. 9, 2004
6499544 Percussive down-the-hole hammer for rock drilling, and a one-way valve used therein Dec. 31, 2002
6474421 Downhole vibrator Nov. 5, 2002
6415876 Hand-held tool with a linear oscillating drive Jul. 9, 2002
6371223 Drill head for directional boring Apr. 16, 2002
6328116 Arrangement in connection with a hydraulic breaking apparatus Dec. 11, 2001
6318478 Damper pressure control apparatus for hydraulic rock drill Nov. 20, 2001
6202757 Impact machine Mar. 20, 2001
6161631 Environmentally friendly horizontal boring system Dec. 19, 2000
6102133 RAM Aug. 15, 2000
5944120 Hydraulic hammer assembly having low vibration characteristics Aug. 31, 1999
5944118 Pneumatic impact breaker Aug. 31, 1999
5896937 Buffer mechanism of hydraulic impact apparatus Apr. 27, 1999
5887665 Striking element Mar. 30, 1999
5566771 Reversible casing for a self-lubricating, fluid-actuated, percussive down-the-hole drill Oct. 22, 1996
5485887 Pneumatic impact tool and piston for a pneumatic impact tool Jan. 23, 1996
5311948 Soft mount air distributor May. 17, 1994
5279120 Hydraulic striking device Jan. 18, 1994
5259462 Soft mount air distributor Nov. 9, 1993
5249634 Impact borer for embedding lines, anchoring cables, and sinking wells Oct. 5, 1993
5183121 Submersible pneumatic drilling unit Feb. 2, 1993
5163519 Pneumatically driven reverse impact device Nov. 17, 1992
5154667 Power hammer improvements Oct. 13, 1992
5152352 Pneumatic percussion tool, especially for the preparation of bones Oct. 6, 1992
5134989 Hydraulic breaker Aug. 4, 1992
5131476 Down hole percussion drill apparatus Jul. 21, 1992
5113950 For percussive tools, a housing, a pneumatic distributor, and a hammer piston means therefor May. 19, 1992
5094303 Impact apparatus and process for the control of impact apparatus Mar. 10, 1992
5086848 Reversible impact hole driller and method of reversing Feb. 11, 1992

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