Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Construction
Class Information
Number: 175/421
Name: Boring or penetrating the earth > Bit or bit element > Symmetrical forked rotary type (e.g., fishtail)
Description: Apparatus comprising a rotary type bit provided with at least two axially extending branches terminating in cutting edges, the configuration of said axially extending branches and cutting edges being such that (1) more than one plane of bilateral symmetry may be passed through an axis coinciding with the rotary axis of the bit or (2) radial symmetry is presented about an axis coinciding with the rotary axis of the bit.










Patents under this class:

Patent Number Title Of Patent Date Issued
8689908 Drill bit having enhanced stabilization features and method of use thereof Apr. 8, 2014
8584777 Rotational drill bits and drilling apparatuses including the same Nov. 19, 2013
7537067 Rotary claw bit May. 26, 2009
7392866 Roof drilling system improvements Jul. 1, 2008
6454029 Rotary boring bit and borer Sep. 24, 2002
6227317 Garden auger having wings and cutters May. 8, 2001
5647448 Drill bit having a plurality of teeth Jul. 15, 1997
5303787 Rotary mining tools Apr. 19, 1994
5180022 Rotary mining tools Jan. 19, 1993
5103922 Fishtail expendable diamond drag bit Apr. 14, 1992
4986373 Post hole digger Jan. 22, 1991
4813500 Expendable diamond drag bit Mar. 21, 1989
4776241 Cutting tool Oct. 11, 1988
4712952 Drill for generating of holes in a work piece Dec. 15, 1987
4320925 Dredge cutterhead tooth Mar. 23, 1982
4252202 Drill bit Feb. 24, 1981
4074780 Earth auger Feb. 21, 1978
3960218 Grass-clearing device for lawn-sprinkler heads Jun. 1, 1976











 
 
  Recently Added Patents
Method and apparatus to select a profile of a digital communication line
Bacterial superantigen vaccines
Methods and kits for predicting the responsiveness of hepatocellular carcinoma patients to 5-fluorouracil-based combination chemotherapy
Light-emitting device, film-forming method and manufacturing apparatus thereof, and cleaning method of the manufacturing apparatus
Wind energy system having a connection protection device
Haloalky -substituted amides as insecticides and acaricides
Visibility radio cap and network
  Randomly Featured Patents
Fume hood for large containers
Head coil and neurovascular array for parallel imaging capable magnetic resonance systems
Device for asymmetric heating and cooling of reaction mixtures during centrifuging and rotor means therefore
Semiconductor device and signal terminating method thereof
Conformable backrest for a chair
Fluoroelastomers based on vinylidene fluoride exhibiting superior resistance to organic bases
Method and tester for verifying the electrical connection integrity of a component to a substrate
Semiconductor wafer inspection system
Compositions
Machine tool assembly having replicated support surfaces