Patent application number | Description | Published |
20100045094 | Bit Holder Usable in Bit Blocks Having Either of a Cylindrical or Non-Locking Taper Bore - A bit holder for use in a bit assembly in road milling, mining and trenching equipment has a hollow generally cylindrical shank and first and second elongate slots positioned in spaced axial relation through the shank. The first slot extends along the shank to the distal end thereof. The second slot may be altered in length and/or shape to fine tune the outward radial force the shank exerts against the bore of a bit block into which it is inserted. | 02-25-2010 |
20100320003 | BIT FOR USE IN AT LEAST ONE OF MINING, TRENCHING AND MILLING APPLICATIONS - A bit includes a body portion having a first shape, a first length, a first end and a second end. A collar portion having a second shape, a thickness, a first surface disposed adjacent a second end of the body portion and a second surface forming a ledge for seating against a surface of a rotary cutting head of a mining machine. A shank portion, has a diameter and a second length. A first end of the shank is secured to the second surface of the collar portion. A groove formed around the shaft portion closely adjacent the second end thereof. A bit tip disposed adjacent the first end of the body portion to contact a hard surface. The bit tip tapers to a pointed end. A connecting means is disposed in the groove for connecting the bit to the working machine. A plurality of fins is disposed along an outer surface of the body portion. | 12-23-2010 |
20100320829 | Bit Holder Usable in Bit Blocks Having Either of a Cylindrical or Non-Locking Taper Bore - A bit holder for use in a bit assembly in road milling, mining and trenching equipment has a hollow generally cylindrical shank and first and second elongate slots positioned in spaced axial relation through the shank. The first slot extends along the shank to the distal end thereof. The second slot may be altered in length and/or shaped to fine tune the outward radial force the shank exerts against the bore of a bit holder block into which it is inserted. | 12-23-2010 |
20110204703 | Bit Assemblies for Road Milling Mining and Trenching Equipment - An improved bit assembly for road milling, mining and trenching equipment includes a streamlined tip assembly that is a combination of conical and cylindrical in shape and devoid of protrusions or annular indentations that might impede the flow of removed material over and around the bit assembly or provide space for removed material to become clogged or imbedded on the tip assembly. The generally cylindrical hollow shank that mounts the bit holder to the bit block includes at least one axially aligned slot along its side wall that allows the side wall to supply radial force to maintain the bit holder in the bit block. | 08-25-2011 |
20120181845 | Dual Slotted Holder Body for Removal Tool Access - A plurality of differing horizontal pairs of slot shapes are positioned in the upper body portion of a quick change type bit holder to provide access to a bit extractor tool for removing the bit holder from its associated bit block. | 07-19-2012 |
20140110991 | Combination Polycrystalline Diamond Bit and Bit Holder - A quick change type bit/bit holder includes several different structures for holding the item in a bit block without the necessity of a fastener. The bit portion of the bit/bit holder combination includes a ductile steel insert with a polycrystalline diamond coated tungsten carbide bit positioned therein. The ductility of the steel insert acts as a shock absorber to allow the bit to successfully remove concrete as well as asphalt in a road milling machine. | 04-24-2014 |
20150028656 | Bit Holder - An improved bit holder includes a larger bit shank bore and an enlarged upper shank segment or band with a taper of up to 7 degrees per side that provides an interference fit between the top of the shank and top of the bit block bore when the bottom of the bit holder body seats on the top of the bit block bore. An annular tapered void adjacent the bit holder tire portion provides for ease of bit holder extraction. | 01-29-2015 |
20150240634 | Bit Holder Shank and Differential Interference Between the Shank Distal Portion and the Bit Holder Block Bore - Improved bit holder/bit holder block structure provides increased access to the rear of the assembly allowing bit holder blocks to be mounted closer to each other for micro-milling operations. Shortened bit holder shanks are reconfigured from prior art to provide increased holding power between the bit holder shank and bit holder block bore. | 08-27-2015 |