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Class Information
Number: 173/127
Name: Tool driving or impacting > Impacting devices (e.g., hammers) > Hammer head comprises plural parts or diverse materials > Piston of drive motor
Description: Apparatus in which the hammer head comprises or is rigidly connected to a mass of material forming an element which is received in a chamber, said element having surface which is acted upon by motive material in the chamber to cause the element to move and deliver a blow.

Patents under this class:

Patent Number Title Of Patent Date Issued
8353360 Pile driver Jan. 15, 2013
8286725 Drive mechanism for power tool Oct. 16, 2012
7527106 Method for operating the engine of fastening tool May. 5, 2009
7118507 Automatic reduction-ratio changing apparatus Oct. 10, 2006
6619407 Air-operated hammer Sep. 16, 2003
6224294 Tubular piling driving apparatus and piling installation method May. 1, 2001
6209659 Hand-held drill with a compressed air-operated hammer mechanism Apr. 3, 2001
6039231 Adjustable energy control valve for a fastener driving device Mar. 21, 2000
5231750 Fastener driving device with offset feed Aug. 3, 1993
5181450 Pneumatic fastener driving apparatus with piston holding detent Jan. 26, 1993
5000365 Adjustable piston-driver connection and method of adjusting Mar. 19, 1991
4669553 Percussion tool Jun. 2, 1987
4602689 Power tool Jul. 29, 1986
4530455 Piston and driver Jul. 23, 1985
4496007 Compressed-air pile-driver Jan. 29, 1985
4384623 Pneumatic fastener gun May. 24, 1983
4371042 Fluid operated ram Feb. 1, 1983
4367800 Subsea pile driver Jan. 11, 1983
4193459 Post-hole driver Mar. 18, 1980
4126191 Gas discharge type underwater hammer with liquid purge and reflood control Nov. 21, 1978
4122904 Pneumatic hammer driver Oct. 31, 1978
4100977 Drop hammers Jul. 18, 1978
4098355 Underwater hammer with circumferential flow seal Jul. 4, 1978
4056150 Ram device Nov. 1, 1977
4043405 Pile-driving arrangement Aug. 23, 1977
3965992 Internally silenced impact driven tools and impacting means therefor Jun. 29, 1976
3958647 Powerful submersible deepwater pile driver powered by pressurized gas discharge May. 25, 1976
3952813 Percussive device for driving holes in soil Apr. 27, 1976
3935908 Pile hammers Feb. 3, 1976

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