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Class Information
Number: 175/300
Name: Boring or penetrating the earth > Below-ground (1) hammer, or (2) impact members > With releasable means to detachably retain telescoping members against axial reciprocation
Description: Apparatus in which means are provided on one of the telescoping members for engaging and holding the other member against axial movement with said reciprocation limiting means in spaced relation, said holding means being selectively releasable to allow relative axial movement between the members.










Sub-classes under this class:

Class Number Class Name Patents
175/302 Condition for release adjustable 11
175/301 Frangible 6
175/304 Resiliently biased latch 30


Patents under this class:

Patent Number Title Of Patent Date Issued
8505653 Downhole apparatus Aug. 13, 2013
8302708 Rotational drill wrenches and drilling apparatuses including the same Nov. 6, 2012
8100200 Chuck assembly for a down-hole drill Jan. 24, 2012
7325631 Mill and pump-off sub Feb. 5, 2008
7299885 Downhole drill string having a collapsible subassembly and method of loosening a stuck drillstring Nov. 27, 2007
6827162 Self-retaining downhole-hammer drill bit Dec. 7, 2004
6810974 Quick release drill bit for down-hole drills Nov. 2, 2004
6789632 Rock drilling apparatus Sep. 14, 2004
6698537 Bit retention system Mar. 2, 2004
6516903 Drill bit stabilizer device Feb. 11, 2003
6308940 Rotary and longitudinal shock absorber for drilling Oct. 30, 2001
6182776 Overburden drilling apparatus having a down-the-hole hammer separatable from an outer casing/drill bit unit Feb. 6, 2001
6070678 Bit retention system Jun. 6, 2000
5647447 Bit retention device for a bit and chuck assembly of a down-the-hole percussive drill Jul. 15, 1997
5425430 Jar enhancer Jun. 20, 1995
5318139 Reduced waiting time hydraulic drilling jar Jun. 7, 1994
5086853 Large bore hydraulic drilling jar Feb. 11, 1992
4903785 Drilling and chiseling tool bit Feb. 27, 1990
4846273 Jar mechanism accelerator Jul. 11, 1989
4694917 Mechanical jarring devices for use in drilling Sep. 22, 1987
4662460 Rotary drilling jar May. 5, 1987
4607692 Wireline jar Aug. 26, 1986
4582148 Mechano-hydraulic double-acting drilling jar Apr. 15, 1986
4558976 Quick fix drill wrench Dec. 17, 1985
4545444 Jar mechanism energizer Oct. 8, 1985
4462471 Bidirectional fluid operated vibratory jar Jul. 31, 1984
4401161 Oil well tool retrieving device Aug. 30, 1983
4186807 Optional up-blow, down-blow jar tool Feb. 5, 1980
4142597 Mechanical detent jars Mar. 6, 1979
4113038 Drilling jar Sep. 12, 1978
4004643 Mechanical drilling jar Jan. 25, 1977











 
 
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