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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....
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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...
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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...
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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...
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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...
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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)...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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3907042 |
Traverse head for rotary drill rig
A traverse head for a rotary drill rig includes a motor and gearcase supported by and drivably connected to a rotatable shaft disposed on a frame. The shaft includes a pair of spaced apart pinions...
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3884591 |
Automatic hydraulic tool slide cam assist for a machine tool
Machine tools such as boring machines have been provided with slide assemblies in the prior art which have been controlled by a cam and cam follower having the advantage of positive mechanical...
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3870109 |
Hydraulic drilling or servicing rig
A fluid operator extends and retracts vertically, elevators with or without the rotary head for placing and pulling drill pipe by the combination of scissor type linkage which moves the head...
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3869003 |
PILE DRIVERS
Cylinder stoppers and tower receiving blocks are automatically or self-operatively engaged or disengaged in the inventive pile drivers through cylinder operation so as to press a pile and to drop...
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3825075 |
DRILL ASSEMBLY
A drill assembly particularly suitable for use in building construction. The assembly includes an upright framework supporting a vertically moveable carriage. A rotatable, first threaded rod...
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3757638 |
FIVE-AXIS SHAPER
A heavy-duty combination vertical and horizontal metal-cutting shaper constituted of a machine bed provided at its back with a massive upright column having two vertical ways traversed by a saddle....
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3692124 |
FEED DEVICE FOR A ROCK DRILL
A feed device which is extendible by means of two cooperating feed screws and which comprises a coupling for locking the screws against rotation relative to each other or one of them relative to a...
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3682261 |
TUNNEL BORING MACHINE
A tunnel boring machine has a carriage which slides along a track. The carriage includes a spindle for attachment to a boring auger, and a power supply which drives the spindle and also drives an...
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3642078 |
EARTH-DRILLING EQUIPMENT
Earth-drilling equipment comprising a drilling table constructed for use in drilling boreholes and for use in lining boreholes with borehole lining tubes so that both operations may be carried out...
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3568779 |
UNDERGROUND ROTARY DRILL
A rotary drilling apparatus of the portable type having a two-part frame including a base and head which are pivotally adjustable relative to one another with the headframe carrying the drill and...
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3565185 |
SLIDE SUPPORTED ROCK DRILL
Bayonet lock elements for a rock drill on the slide of a feed shell are disposed in a plane substantially parallel with the rock drill guide means of the shell and constitute together with...
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3533478 |
DRILLING MACHINE,IN PARTICULAR FOR OFFSHORE DRILLING
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3508619 |
HOSE GUIDE FOR ROCK DRILLS
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3500941 |
FEED MECHANISM FOR ROCK DRILL HOSE GUIDE
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3480091 |
FEED APPARATUS FOR ROCK DRILLS
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3247913 |
Feed bar arrangement for rock drills
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3244240 |
Drill rigs
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3236316 |
Earth boring apparatus
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3205951 |
Face drilling machine
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3190369 |
Rotary percussion rock drilling apparatus
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3132705 |
Post hole digger accessory for tractors
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3131916 |
Feed for deep mine auger machine
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3118509 |
Trench drill
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3101006 |
Drill mounting
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2979143 |
Vertical drill system for installing pipe
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2969844 |
Earth boring implement
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2915923 |
Power feed mechanism for machine tools
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2907550 |
Feeding device for rotary well drill
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2902890 |
Boring machines
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2895715 |
Drilling and similar machines
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