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Class Information
Number: 173/206
Name: Tool driving or impacting > Impacting devices (e.g., hammers) > Hammer head constitutes piston of drive motor
Description: Apparatus in which the hammer head comprises or is rigidly connected to a disk or cylinder within a chamber, said disk or cylinder having a surface which is acted upon by a motive fluid in the chamber which causes the disk or cylinder to move and deliver a blow.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7581599 |
Percussive device for a rock drilling machine, method for achieving a reciprocating piston movement and rock drilling machine |
Sep. 1, 2009 |
| 7523791 |
Impact power tool |
Apr. 28, 2009 |
| 7484570 |
Percussion device |
Feb. 3, 2009 |
| 7481764 |
Self-advancing device |
Jan. 27, 2009 |
| 7410010 |
Hydraulic impact mechanism |
Aug. 12, 2008 |
| 7392855 |
Vibratory pile driving systems and methods |
Jul. 1, 2008 |
| 7322425 |
Method of generating stress pulse in tool by means of pressure fluid operated impact device, and impact device |
Jan. 29, 2008 |
| 7306047 |
Impact hammer drill |
Dec. 11, 2007 |
| 7252158 |
Pilot valve for a pneumatic tool |
Aug. 7, 2007 |
| 7207633 |
Scaling assembly |
Apr. 24, 2007 |
| 7201302 |
Driver blade with auxiliary combustion chamber for combustion powered fastener-driving tool |
Apr. 10, 2007 |
| 7131503 |
Impact driver having a percussion application mechanism which operation mode can be selectively switched between percussion and non-percussion modes |
Nov. 7, 2006 |
| 7073607 |
Operating system for hydraulic rock drill |
Jul. 11, 2006 |
| 7055621 |
Method and apparatus for replacement of underground pipe |
Jun. 6, 2006 |
| 7051995 |
Device for generating a reciprocating movement, valve arrangement therefore and pheumatic tool |
May. 30, 2006 |
| 7051568 |
Multi-purpose hydraulic tool |
May. 30, 2006 |
| 7032684 |
Method of opening joints between drilling components, and rock drill |
Apr. 25, 2006 |
| 7032688 |
Shock absorbing valve for a pneumatic tool |
Apr. 25, 2006 |
| 6988564 |
Diesel hammer systems and methods |
Jan. 24, 2006 |
| 6981558 |
Controller for an unbalanced mass adjusting unit of a soil compacting device |
Jan. 3, 2006 |
| 6966240 |
Hydraulic ratchet wrench with double-action hydraulic cylinder piston drive |
Nov. 22, 2005 |
| 6959967 |
Hammer with high pressure shut-off |
Nov. 1, 2005 |
| 6932166 |
Pneumatic tool |
Aug. 23, 2005 |
| 6913091 |
Method and apparatus for replacement of underground pipe |
Jul. 5, 2005 |
| 6904980 |
Linerbolt removal tool |
Jun. 14, 2005 |
| 6877569 |
Method for controlling operating cycle of impact device, and impact device |
Apr. 12, 2005 |
| 6860340 |
Rock drilling machine |
Mar. 1, 2005 |
| 6857482 |
Percussive implement of the rock breaker type |
Feb. 22, 2005 |
| 6799641 |
Percussive drill with adjustable flow control |
Oct. 5, 2004 |
| 6782956 |
Drive system having an inertial valve |
Aug. 31, 2004 |
| 6736218 |
Diesel hammer systems and methods |
May. 18, 2004 |
| 6698532 |
Piercing apparatus |
Mar. 2, 2004 |
| 6691798 |
Variable hand pressure activated power tool |
Feb. 17, 2004 |
| 6679340 |
Hydraulic tool |
Jan. 20, 2004 |
| 6672403 |
Method and apparatus for protecting a fluid-operated percussion device against no-load strokes |
Jan. 6, 2004 |
| 6619407 |
Air-operated hammer |
Sep. 16, 2003 |
| 6601655 |
Piercing apparatus |
Aug. 5, 2003 |
| 6578357 |
Regulating device for hydraulic working tools |
Jun. 17, 2003 |
| 6557652 |
Method for performing ground or rock work and hydraulic percussion device |
May. 6, 2003 |
| 6557647 |
Impact hammer systems and methods |
May. 6, 2003 |
| 6530435 |
Apparatus for a hand-held pneumatic impact tool |
Mar. 11, 2003 |
| 6523621 |
Delay-interruption connector for pneumatic tool |
Feb. 25, 2003 |
| 6508315 |
Small impact power tool |
Jan. 21, 2003 |
| 6491114 |
Slow start control for a hydraulic hammer |
Dec. 10, 2002 |
| 6439317 |
Device for breaking concrete |
Aug. 27, 2002 |
| 6401835 |
Drilling tool |
Jun. 11, 2002 |
| 6378951 |
Vibratory pavement breaker |
Apr. 30, 2002 |
| 6334495 |
Fluid operated percussion device |
Jan. 1, 2002 |
| 6321854 |
Power tool |
Nov. 27, 2001 |
| 6273199 |
Arrangement in rock drill and method of controlling rock drilling |
Aug. 14, 2001 |
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