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7484570 |
Percussion device
Percussion device including a machine housing ( 1 ), a forwards and backwards movable percussion piston ( 2 ) in the machine housing, and a reciprocatingly movable tubular valve body ( 6 ) inside...
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7410010 |
Hydraulic impact mechanism
A hydraulic impact mechanism includes a housing with a cylinder bore, a forward working chamber and a rear working chamber, a hydraulic fluid supply passage connected to the forward working chamber...
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7392855 |
Vibratory pile driving systems and methods
A drive system for driving and/or extracting an elongate member. The drive system comprises a piston drive assembly, a hydraulic system, and a vibration drive assembly. The piston drive assembly...
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7306047 |
Impact hammer drill
An impact hammer drill capable of performing drilling operation at a high speed with low noise and without requiring a large thrust. The drill includes a main shaft rotatable by an output shaft of...
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7156190 |
Impact tool
An impact tool has a slidable hammer that is driven by hydraulic oil under pressure inside a chamber. The hydraulic oil is pressurized by a piston driven by compressed gas on the opposite side of...
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7117779 |
Driver for power tools
A power source ( 10 ) for providing energy to drive a mechanical device including a receiving chamber ( 11 ) and discrete propellant charges ( 23 ) for selective detonation whereby gases generated...
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6994175 |
Hydraulic drill string
A hydraulic drill string device can be in the form of a percussive hydraulic in-hole drilling machine that has a piston hammer ( 50 ) with an axial through hole ( 51 ) into which a tube ( 35 )...
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6896071 |
Drive systems and methods for sheet piles
A drive system for driving a sheet pile member at a desired location in the ground. The drive system comprises a source of pressurized air, an actuator system defining a drive axis, and an adapter...
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6889777 |
Implement for driving posts
A post driving implement for use with a vehicle, such as a tractor or a skid loader, is disclosed. The post driving implement is comprised of a hammer, a hammer channel, and a hammer cylinder. The...
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6877569 |
Method for controlling operating cycle of impact device, and impact device
A method for controlling the operating cycle of an impact device, and an impact device. Percussion piston position is measured using a sensor ( 11 ) from which the measurement data is transmitted...
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6736218 |
Diesel hammer systems and methods
A diesel hammer system for driving piles. In one form of the invention, a control pinion is attached to a cam member employed to adjust the volume of a fuel portion of a pump chamber. A control...
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6702045 |
Drilling apparatus
There is provided drilling apparatus ( 10 ) comprising a hammer casing ( 11 ), a free piston motor piston guide and porting sleeve ( 12 ), a drive sub ( 13 ), a drill bit ( 15 ) splined by shank (...
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6499544 |
Percussive down-the-hole hammer for rock drilling, and a one-way valve used therein
A down-the-hole percussive hammer includes a casing, a drill bit attached to a lower end of the casing, and a reciprocable hammer for impacting against the drill bit. A top sub attached to an upper...
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6474421 |
Downhole vibrator
A vibratory impact tool for loosening downhole stuck objects in oil or gas wells, utilizing an internal piston spring which is repeatedly compressed by hydraulic pressure, and repeatedly released...
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6415876 |
Hand-held tool with a linear oscillating drive
A motor housing ( 11 ) is mounted in a handle body ( 10 ) so as to slide in the longitudinal direction. A tubular pipe ( 37 ) that can slide in a bore ( 38 ) of the body ( 10 ) projects from the...
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6328116 |
Arrangement in connection with a hydraulic breaking apparatus
The invention relates to an arrangement in connection with a hydraulic breaking apparatus, the arrangement comprising a housing (4) placed around a percussion hammer (1), and a changeable wearing...
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6318478 |
Damper pressure control apparatus for hydraulic rock drill
A damper pressure control apparatus for a hydraulic rock drill is automatically adjustable of damper pressure to be applied to a damping piston depending upon a thrust of a rock drill body and...
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6202757 |
Impact machine
When cutting metal rods, for instance, percussion machines are used that utilize stored kinetic energy which has been produced either mechanically or by the use of compressed gas. A drawback is the...
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6161631 |
Environmentally friendly horizontal boring system
A system for drilling a horizontal bore through frangible material includes a barrel mechanism containing a automatically reciprocating piston mechanism for automatically delivering hammering blows...
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6102133 |
RAM
For selective operation in a Diesel mode and a pressure air mode a Diesel type pile hammer is additionally equipped with a pressure air accumulator, which is connected to the working space of the...
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5944118 |
Pneumatic impact breaker
A pneumatic impact breaker comprises a housing (11) with a cylinder bore (20), a hammer piston (28) with a piston head (63) and an impact delivering stem portion (64), an anvil (14) displaceably...
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5944120 |
Hydraulic hammer assembly having low vibration characteristics
A hammer assembly which decreases the severity of impact shocks generated by the hammer assembly during operation thereof is disclosed. The hammer assembly includes a housing defining a chamber....
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5896937 |
Buffer mechanism of hydraulic impact apparatus
The present invention relates to a buffer mechanism of a hydraulic impact apparatus of a rock drill, and the like, and the buffer mechanism reduces damage by buffering the reflected energy from a...
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5887665 |
Striking element
The striking element (1) according to the invention serves for the production of shocks which act on a tool. It has a body (3) with a plurality of parallel bores (4). A piston (2), heavy in mass,...
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5566771 |
Reversible casing for a self-lubricating, fluid-actuated, percussive down-the-hole drill
A reversible casing for a fluid-actuated, percussive, down-the-hole drill is provided with a tubular body having an internal surface forming a bore extending along a longitudinal axis. The internal...
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5485887 |
Pneumatic impact tool and piston for a pneumatic impact tool
The impact tool is provided with a piston (15) oscillating within a cylinder (10). For selecting, with which piston impact surface the piston (15) impacts on the head (7) of a tool holder (2) and...
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5311948 |
Soft mount air distributor
A valveless percussive pneumatic drill includes a housing, a piston in the housing, reciprocating along the axis of the housing, a piston support bearing in the housing and an air distributor in...
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5279120 |
Hydraulic striking device
A hydraulic striking device requiring no complicated adjustment of the flow rate of hydraulic fluid from the hydraulic pressure source of a hydraulic construction machine, etc. and operable by...
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5249634 |
Impact borer for embedding lines, anchoring cables, and sinking wells
An impact borer having a shell and an air drive within the shell. The air drive includes a ram for reciprocation within the shell and a manifold joined to the shell. The manifold defining an inlet...
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5183121 |
Submersible pneumatic drilling unit
This heavy duty equipment comprises a working cylinder, a striking piston, an upper lid and a holder of a drill bit. An anterior side duct in the wall of an upper working space of the working...
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5163519 |
Pneumatically driven reverse impact device
A device for removing pins, nails, dowels, rods, and the like from material which includes wood, metal, concrete, and human and animal bone, includes a pneumatically actuated piston producing a...
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5154667 |
Power hammer improvements
Improvements to diesel power hammers which allow the hammers to be operated smokelessly are disclosed. Kerosene and synthetic oil replace diesel fuel and mineral oil as fuel and lubricant,...
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5152352 |
Pneumatic percussion tool, especially for the preparation of bones
A piston is oscillating periodically within a cylinder, propelled by compressed air. At at least one of its end positions, the piston generates a stroke that acts on a working tool, e.g. a rasp....
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5134989 |
Hydraulic breaker
A hydraulic breaker includes a piston which is designed in the five-staged configuration including a first stage, a second stage, a third stage, a fourth stage and a fifth stage. The second stage...
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5131476 |
Down hole percussion drill apparatus
A downhole percussion drill or hammer (100) is disclosed having an outer casing (2) in which a reciprocating piston (26) which periodically impacts a drilling bit (16) disposed at a bottom end of...
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5113950 |
For percussive tools, a housing, a pneumatic distributor, and a hammer piston means therefor
Replacing valves in prior percussive devices, the distributor is a simple tube, which can be of plastic construction, for admitting operative compressed air to drive and return chambers at opposite...
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5094303 |
Impact apparatus and process for the control of impact apparatus
In a device for controlling a pneumatic pile-driving or ram drilling apparatus having an internal, reciprocating ram, the control is effected in a forward stroke phase, a reverse stroke phase, and...
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5086848 |
Reversible impact hole driller and method of reversing
An improved reversing mechanism in an impact hole drilling tool having a tubular body with a forward ground piercing end and a rearward pneumatic supply end. The reversing mechanism includes a slot...
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5050687 |
Compression-vacuum action percussive machine
A compression-vacuum action percussive machine is proposed, which has a casing (1) accommodating a tool (7) and a cylinder (2) with a drive piston (3) and a striker (4) having a chamfer (10) on the...
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4923018 |
Percussion drill
A percussion drill comprises a drill bit and a reciprocable hammer piston for imparting blows to the bit. Pressurized air is supplied to the piston for reciprocating the piston. Some of the air is...
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4821813 |
Percussion drilling apparatus
A percussion drilling apparatus has a control unit in which a displacement reversing unit is arranged axially adjacent to a piston control unit, with the result that the control edges for the...
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4739837 |
Pneumatic impact tool
A pneumatic impact tool comprising a casing having an interior space in which is mounted a piston for reciprocations under the action of compressed air for delivering useful blows, and ports of at...
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4653596 |
Percussive air tool
A percussive air tool with a hollow cylindrical stepped housing having air inlet and air exhaust ports. A stepped hammer reciprocates inside the housing and has an axial central bore with a tube...
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4534422 |
Fluid operated hammer
In deep bore drilling it is usual to use a fluid operated percussive hammer to provide necessary drive for the boring operation. However a difficulty which is encountered with hammers which are...
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4520886 |
Rotary drilling tool with percussion device
A hollow rotary drilling tool is equipped with a percussion device which comprises a nozzle comprising a cylindrical annular duct followed by a divergent annular duct. The divergent duct opens into...
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4512417 |
Hydraulic reciprocating device
This invention pertains to a hydraulic reciprocating device having a housing and a piston in the housing. The piston has a first and second surface, and a means for intermittently communicating the...
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4506742 |
Vibrationless percussion tool
A vibrationless percussion tool is disclosed characterized by use of a piston mounted for reciprocal movement against a constant pressure force within a casing to cyclically impact an anvil...
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4496007 |
Compressed-air pile-driver
A compressed-air pile-driver, especially for axially insertable tools, including a ram arranged in a housing. The interior of the housing is divided by the ram respectively into an upper...
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4429751 |
Control system for pile hammers
An automatic, fluid actuated, external control system for a pile hammer or the like is provided that can vary the operating stroke length of a pile hammer and that can be used to operate the pile...
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4402370 |
Valveless pneumatic hammer
A valveless pneumatic hammer comprises a hollow casing having a backhead assembly at one end and a bit assembly at the other, and a piston reciprocable in the casing. There is a chamber divider at...
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