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| Number | Title | Issue Date |
| 7392382 | Method and apparatus for verifying data timeliness with time-based derived cryptographic keys A method of verifying data timeliness with time-based derived cryptographic keys is disclosed. A master key is received. Based on both the master key and a current time, an interval key is derived. Data, which was encrypted with the interval key, is decrypted with t... | 06/24/2008 |
| 6651754 | Apparatus for moving earth boring machines Apparatus for moving an earth boring machine along a track includes a module which is releasably connected as a unit to the earth boring machine. The module includes a support plate releasably connected to the earth boring machine.... | 11/25/2003 |
| 6015112 | Arrangement for leading flexible elements to a rock drill, and a hose reel structure An arrangement for leading flexible elements, such as hoses, around a hose reel to a rock drill moving along a feed beam, in which the flexible elements are coupled immovably to the feed beam and to the rock drill, characterized in that the flexible eleme... | 01/18/2000 |
| 5050688 | Rock drill feed support A rock drill feed support beam comprises longitudinal side plates and a base member which are formed of folded metal plate welded together to form a channel-like support beam with a substantially clear unobstructed space between the members for containing... | 09/24/1991 |
| 4881604 | Computer aided anti-buckling device for mine roof bolting machines The apparatus comprises a mine shaft roof bolting machine for drilling holes in a mine shaft roof in combination with an apparatus for controlling the thrust applied to the drill rod, commonly known as a pinning rod, to ensure that a buckling failure of t... | 11/21/1989 |
| 4838362 | Apparatus for manipulating a tool Apparatus for manipulating a tool which is particularly suited for use in drilling and inserting bolts into thin seams of mine workings. The apparatus (100) comprises a reaction support member (4) to support the tool, a chuck (1) for holding the tool, mou... | 06/13/1989 |
| 4691787 | Earth auger An earth auger is provided which can be compacted, lightened and adjusted with respect to feed speed according to geology. The earth auger has a screw having a spiral blade provided with notches arranged axially linearly. A first rotary member and a secon... | 09/08/1987 |
| 4478290 | Anti-buckling device for mine-roof bolting machines The invention comprises generally apparatus for use with an underground mine-shaft roof-bolting machine having a torque motor, a pinning rod held for rotation by the torque motor, a controllable arrangement for exerting upward thrust on the torque motor t... | 10/23/1984 |
| 4476940 | Portable drilling apparatus A lightweight portable drilling apparatus capable of being assembled and disassembled for lifting and moving by helicopter. The apparatus includes a center vertically-oriented drilling tower equipped with a rotary drilling assembly, and having a base supp... | 10/16/1984 |
| 4340122 | Mounted drilling apparatus The drilling apparatus includes a mount in the form of a cylindrical member defining an elongated passageway and being provided with two opposite guiding rails each being formed with an elongated recessed channel communicating with the passageway; a rotar... | 07/20/1982 |
| 4328872 | Anti-buckling device for mine-roof bolting machines The invention comprises generally apparatus for use with an underground mine-shaft roof-bolting machine having a torque motor, a pinning rod held for rotation by the torque motor, a controllable arrangement for exerting upward thrust on the torque motor t... | 05/11/1982 |
| 4296819 | Cable tensioner for a downcrowding device for earth boring machines A downcrowding device for an earth boring apparatus has an improved take-up device for taking up slack in the downcrowding cable. The downcrowding device is of the type having a rotatable drum, hydraulic rams for moving the drum downwardly, a brake for pr... | 10/27/1981 |
| 4290494 | Flexible shaft and roof drilling system A system for drilling holes in the roof of a mine has a flexible shaft with a pair of oppositely wound, coaxial flat bands. One of the flat bands defines an inner spring that is wound right handed into a helical configuration, adjacent convolutions being ... | 09/22/1981 |
| 4192393 | Helicopter portable earth drilling apparatus A portable earth drilling apparatus adapted for helicopter transportation has been designed in light modular form and particularly adapted for use at high elevations under circumstances where prior art drill rigs are not capable of efficient operation.... | 03/11/1980 |
| 4151888 | Submergible pile driver with extension tube to accommodate tensioned cable string loops An elongated hollow tube 2 is secured to the top of a pile driver 1, and the assembled unit is lowered to the head of an anchoring pile 12on the sea bottom via spaced guide rings 13 on a submerged tower 10. The flexible hose string 5 for conveying hydraul... | 05/01/1979 |
| 4099787 | Mining machine A conveyor-mounted mining machine incorporates at least two driving units. Each unit comprises a linearly drivable member operatively engaged with a driven wheel coupled by a clutch to a driving wheel drivingly engaged with a stationary part of the convey... | 07/11/1978 |
| 4069877 | Mechanism for tensioning fluid hoses on a rock drill feed A tensioning mechanism for the fluid conductor hoses of a feed mounted rock drill comprises a plurality of fluid cylinders mounted stationary on a bracket supported midway along the length of the drill feed channel. Elongated tubular pistons are slidably ... | 01/24/1978 |
| 4057115 | Flexible shaft for a roof drill A flexible shaft with an inner sleeve defining a hollow core for chip removal. A cylindrical rod is wound right handed into a helical configuration about the sleeve, the convolutions of the rod being in close adjacency with one another. A flat band is wou... | 11/08/1977 |
| 4033419 | Vibrator and pushing apparatus for driving metal pins in rock faces in mines Method and apparatus for driving metal pins into a rock face in an underground mine to strengthen rock surfaces such as stratified overburden, or rock ribs, against failure. A cylinder containing a pin with its head resting on a driven member, and having ... | 07/05/1977 |
| 4015672 | Digger attachment Disclosed is a digger attachment for a tractor including a frame having at one end of a frame arm a three-point mount for securing the digger to the tractor. The opposite end of the frame arm supports an auger for pivotal movement about a transverse axis.... | 04/05/1977 |
| 3980144 | Rock drill feed mechanism A rock drill feed shell is slidably mounted on a support bracket and is connected to a feed screw which is threaded through a feed nut mounted on an elongated supporting tube disposed telescopically within the feed shell. The supporting tube is displaceab... | 09/14/1976 |
