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Class Information
Number: 175/417
Name: Boring or penetrating the earth > Bit or bit element > Impact or percussion type > With internal-fluid passage
Description: Apparatus in which the bit is provided with a drilling fluid passage enclosed within the body of the bit and having an inlet or exhaust port opening to the outside of the bit.










Sub-classes under this class:

Class Number Class Name Patents
175/419 Cruciform 11
175/418 Plural openings 75


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8640794 Pressurized fluid flow system for a normal circulation hammer and hammer thereof Feb. 4, 2014
8561730 Foot valve assembly for a down hole drill Oct. 22, 2013
8550191 Digging tool, digging bit, and device Oct. 8, 2013
8286736 Drill bit, a drill rod and a self drilling roof bolt Oct. 16, 2012
7712554 Percussive drill bit provided with an improved chuck assembly May. 11, 2010
7478648 Hydraulic pressure accumulator Jan. 20, 2009
7467675 Device for channeling solids and fluids within a reverse circulation drill Dec. 23, 2008
7441611 Pneumatic rock drill Oct. 28, 2008
7410013 Boring and drilling apparatus Aug. 12, 2008
7392857 Apparatus and method for vibrating a drill bit Jul. 1, 2008
7392863 Rock drill bit Jul. 1, 2008
7325633 Rock drill bit and a thread joint therefor Feb. 5, 2008
7290626 Transmission sleeve Nov. 6, 2007
7159676 Fluid distributor device for down-hole-drills Jan. 9, 2007
7143846 Method for drilling and drilling apparatus to enable reverse circulation Dec. 5, 2006
7128172 Drill string for upward drilling and components therefor Oct. 31, 2006
7055633 Concrete drill Jun. 6, 2006
7051822 Drill bit and drill tip having a tip-locating structure May. 30, 2006
7040421 Liquid driven downhole drilling machine May. 9, 2006
7004686 Rock bolts with expandable element Feb. 28, 2006
6971458 Drill bit Dec. 6, 2005
6886645 Liquid seal for wet roof bit May. 3, 2005
6712163 Rock drilling tool Mar. 30, 2004
6702045 Drilling apparatus Mar. 9, 2004
6502650 Percussive down-the-hole hammer for rock drilling, and a drill bit used therein Jan. 7, 2003
6454026 Percussive down-the-hole hammer for rock drilling, a top sub used therein and a method for adjusting air pressure Sep. 24, 2002
6435288 Rock drill bit Aug. 20, 2002
6431294 Percussive tool Aug. 13, 2002
6405723 Suction tool Jun. 18, 2002
6397956 Directional drilling tool Jun. 4, 2002
6138775 Boring machine Oct. 31, 2000
6125952 Percussive down-the-hole hammer and a drill bit therefor Oct. 3, 2000
6109377 Rotatable cutting bit assembly with cutting inserts Aug. 29, 2000
6102141 Rock drill having an internal flushing channel Aug. 15, 2000
6095266 Drill rod and method for its manufacturer Aug. 1, 2000
6092612 Rotary drilling systems Jul. 25, 2000
6044919 Rotary spade drill arrangement Apr. 4, 2000
6044920 Rotatable cutting bit assembly with cutting inserts Apr. 4, 2000
5947215 Diamond enhanced rock drill bit for percussive drilling Sep. 7, 1999
5927411 Connector with variable resistance retention member Jul. 27, 1999
5878634 Earth boring drill bit with shell supporting an external drilling surface Mar. 9, 1999
5873579 Protective device for a fluid-operated percussion tool Feb. 23, 1999
5833017 Cutting bit assembly for impinging an earth strata Nov. 10, 1998
5722495 Make up system of a down-the-hole hammer Mar. 3, 1998
5699867 Bit retention device for a bit and chuck assembly of a down-the-hole, percussive drill Dec. 23, 1997
5666864 Earth boring drill bit with shell supporting an external drilling surface Sep. 16, 1997
5645132 Drill bit having springless check valve and method of blocking backflow during drilling Jul. 8, 1997
5445232 Hydraulic breaking hammer Aug. 29, 1995
5441121 Earth boring drill bit with shell supporting an external drilling surface Aug. 15, 1995
5435401 Down-the-hole rock drill Jul. 25, 1995

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