| Patent Number |
Title Of Patent |
Date Issued |
| D525995 |
Portion of a drill bit |
August 1, 2006 |
|
| 6767156 |
Thread joint and threaded components for percussive drilling components |
July 27, 2004 |
| Two components used in a percussive drill string include a spigot and a sleeve, respectively. The spigot includes a male thread connected to a female thread of the sleeve to form a thread joint. The male and female threads are dimensioned such that axially inner and outer end areas of th |
| 6681875 |
Guide tube of a drill string configured to facilitate unscrewing thereof from a member of the dr |
January 27, 2004 |
| A guide tube for use in a rock drill string includes a main portion, a sleeve disposed at a first end of the main portion, and a male thread portion disposed at a second end of the main portion. The sleeve forms a recess having a female thread. A flush channel extends through the guide |
| 6530440 |
Percussive drilling apparatus |
March 11, 2003 |
| A percussive drill for extension drilling includes a drill bit, a tube having a male screw thread attached to a female screw thread of the drill bit, and a rod having a male screw thread attached to a female screw thread of the tube. Central passages of the rod and tube are aligned with |
| 6494275 |
Rock drill bit having retrac teeth and method for its manufacturing |
December 17, 2002 |
| A rock drill bit for percussive drilling, especially top hammer drilling, includes a bit head provided with front rock crushing buttons and a skirt. The bit head is provided with a number of grooves formed in the outside of the skirt and extending in the axial direction of the drill bit. |
| 6164392 |
Percussive drilling apparatus |
December 26, 2000 |
| A percussive drill for extension drilling includes a drill bit, a tube having a male screw thread attached to a female screw thread of the drill bit, and a rod having a male screw thread attached to a female screw thread of the tube. Central passages of the rod and tube are aligned with |
| 5984030 |
Rock drilling tool, drill bit and a method of transferring percussive energy |
November 16, 1999 |
| A rock drilling tool for percussive drilling includes a drill bit and a drill tube cooperating by means of shoulder abutment in a threaded connection. The connection includes at least one male thread and a female thread. The male thread is provided on a shank being an integral part of |
| 5782278 |
Cant forming device |
July 21, 1998 |
| The invention is meant for a cant forming arrangement of the kind with at least two rotational chipping heads with a basic cut off conical form where they each have a basic conical main surface and a small end, whereby the chipping heads are arranged in pairs with the small ends turned |
| 5603997 |
Packaging material process for producing same and use thereof |
February 18, 1997 |
| The present invention relates to a packaging material for reduced transfer from a package to its content of substances causing undesirable taste and/or hazardous substances, this reduction being due to the packaging material containing a hydrophobic zeolite. More specifically, the in |
| 4255102 |
Machine for treatment of lignocellulose containing board materials with gaseous agents |
March 10, 1981 |
| A machine for treatment of board material with gaseous substances under the influence of negative pressure in which the upper zone of treatment applying the treating gas has a greater surface area applied to the board than the surface area of the lower negative pressure zone applied to t |
