|
Match
|
Document |
Document Title |
|
|
8176995 |
Reduced-impact sliding pressure control valve for pneumatic hammer drill
A method and means of minimizing the effect of elastic valve recoil in impact applications, such as percussive drilling, where sliding spool valves used inside the percussive device are subject to...
|
|
|
8151900 |
Percussion equipment driven by a pressurized incompressible fluid
A percussion apparatus driven by a pressurized incompressible fluid includes a body with two coaxial bores for slidably mounting of a tool, and separately slidably mounting a striking piston having...
|
|
|
8118112 |
Rock breaking device, protection valve and a method of operating a rock breaking device
A hydraulic rock breaking device, a protection valve and a method of operating a hydraulic rock breaking device. The rock breaking device comprises a percussion device to which pressure fluid is...
|
|
|
8109348 |
Down-the-hole hammer drill
There is provided a downhole hammer including a drill bit (2) retained by short (4) and long (5) drive pins in the bore of a driver chuck (1). The chuck (1) and bit (2) shank have machined...
|
|
|
8051919 |
Fastening tool with automatic feeding of wire-collated fasteners
A method for loading coil collated fasteners into a fastening tool. The method includes providing internal access to the fastening tool by moving a door structure and a portion of a canister to...
|
|
|
8006776 |
Sliding pressure control valve for pneumatic hammer drill
A pneumatic device control apparatus and method comprising a ported valve slidably fitted over a feed tube of the pneumatic device, and using a compliant biasing device to constrain motion of the...
|
|
|
7992652 |
Fluid distributor cylinder for percussive drills
A fluid distributor cylinder is for a percussive drill assembly that includes a casing having an inner circumferential surface defining a central bore, a central axis extending through the bore, a...
|
|
|
7900420 |
Hammer drill attachment and method
A pressure joining method includes a hammer drill attachment device mountable within the chuck of a hand-held hammer drill. Using the hammer drill attachment, an operator installs flooring sheets...
|
|
|
7858219 |
Locking mechanism of battery pack
A locking mechanism of a battery pack A is provided with a hook 14 which can be locked to a mounting part B of an object equipment such as an electric tool in a state slid with respect to the...
|
|
|
7836969 |
Method for controlling pressure fluid operated percussion device, and percussion device
The invention relates to a method for controlling a pressure fluid operated percussion device comprising a working chamber for pressure fluid and in the working chamber a transmission piston...
|
|
|
7832504 |
Exhaust valve and bit assembly for down-hole percussive drills
A bit assembly is for a percussive drill that includes a casing with an interior chamber and includes a bit connectable with the casing and having a longitudinal bore and an axis through the bore....
|
|
|
7784561 |
Ground drilling hammer and the driving method
Disclosed herein is a pneumatic operated hammer for rock drilling, the hammer comprising a cylindrical casing, a back head mounted at an upper portion of the casing, a check valve for...
|
|
|
7757779 |
Compressed air percussive mechanism for a down hole hammer and down hole hammer
Pressure-air driven percussion device for a down-the-hole drill with a hammer-piston which is axially reciprocally movable in a hammer-piston chamber through a driving device. The hammer-piston in...
|
|
|
7694750 |
Hammer drill
A hammer drill includes a motor; a spindle rotatingly driven by the motor and holding an output bit; a motion conversion member for converting rotational movement of the motor to reciprocating...
|
|
|
7600578 |
Percussion adapter for positive displacement motors
A percussion adapter for a positive displacement motor including a housing, a torque tube and a reciprocating percussive piston operable by application of fluid pressure thereto. The piston can be...
|
|
|
7426965 |
Power transmission unit of an impactor, a hydraulic jet impactor and the application thereof
The invention discloses a fluid-driven impactor, a power transmission mechanism for the impactor and the use of the impactor. In the prior art, the working life of the impactor is short, since a...
|
|
|
7422074 |
Delayed compression sleeve hammer
A sleeve carried by and preferably slidable relative to the piston, for controlling air passages associated with a central air feed tube, whereby retraction pressure is applied to the piston...
|
|
|
7198115 |
Lead alignment attachment
A construction equipment attachment for driving an object, such as a timber piles, steel piles, pipe piles, steel sheet piles, h-beam and the like, is provided. In one embodiment, the attachment...
|
|
|
7063172 |
Grounding rod driving device
A driving assembly includes a driving device that is slidable along one or more vertical supports as the driving device drives a driving member into an object. The driving assembly may be suspended...
|
|
|
7040413 |
Hand power tool with a pneumatic striking mechanism
The striking mechanism has a hammer barrel (3), which has at least one control opening (23) through which, in an idle position, the air can escape from the hammer barrel (3), and which in a...
|
|
|
7013985 |
Pneumatically operated screw driver
A compact and light-weight pneumatically operated screw driver providing high speed screw fastening with high operability. A rotary member rotationally driven by a pneumatic motor includes a main...
|
|
|
6986394 |
Reciprocable impact hammer
In the field of borehole creation there is a need for a reciprocable impact hammer with a tool that is rotatable while under load. A reciprocable impact hammer (10) for use in a downhole location...
|
|
|
6942042 |
Pneumatic motor-controlled valve of screwdriver
A pneumatic motor-controlled valve of a screwdriver is installed between an air guide hole of a pneumatic motor and a main air valve gate in the screwdriver. A valve hole is formed on a guide seat...
|
|
|
6912932 |
Depth adjusting system for a screw gun
A depth adjusting system for a screw gun comprises a base supported on the screw gun, an on/off collar removably attached to the base, and an adjusting collar and a depth locator mounted to the...
|
|
|
6672404 |
Screw fastening machine
Two guide members cooperatively constitute a chuck portion for holding a screw head. Opening and closing of the chuck portion is regulated depending on a mutual position between a machine body and...
|
|
|
6655568 |
Setting tool
A setting tool including a bolt guide (2) secured in the tool housing (1) against displacement in an axial direction, a spring-biased press-on feeler (6) and an axially displaceable safety sleeve...
|
|
|
6619407 |
Air-operated hammer
The subject invention pertains to an improved air-operated hammer which can utilize a pressurized air reservoir located near a pressurized air entrance of the hammer. This pressurized air reservoir...
|
|
|
6505689 |
Arrangement for controlling rock drilling
The invention concerns an arrangement for controlling a hydraulic rock drilling device. The arrangement includes a pressure ratio valve that is used for adjusting the relation between the pressures...
|
|
|
6488264 |
Governor valve device in a pressure fluid operated tool
Governor valve device for a pressure fluid operated tool having a ball valve (23, 24), the valve ball (24) of which is provided in a cavity (25), open towards the seal ring (23) of the valve, in a...
|
|
|
6464023 |
Hydraulic in-the-hole percussion rock drill
A hydraulic percussion drill includes a piston hammer disposed in a cylinder for reciprocating movement in response to pressure fluid acting continuously on one transverse face of the piston hammer...
|
|
|
6283229 |
Impact device for directional boring
An impact boring tool according to the invention suitable for using with a directional boring machine has a tubular housing and a head mounted at a front end of the housing. The head preferably...
|
|
|
5971083 |
Pressure fluid operated impact mechanism
Pressure fluid operated impact mechanism having a reciprocating working member (5), a stop member (17) and, formed between said members, a drive chamber (18) with seals (15, 16) and a regulating...
|
|
|
5893419 |
Hydraulic impact tool
A hydraulically driven hammer has a piston which contains metal piston rings on a constant diameter section. The housing has a plurality of axially spaced apart radial ports that extend through the...
|
|
|
5806610 |
Apparatus for generating impacts
An apparatus for generating impacts which has a hydraulic cylinder and a reciprocating piston. The hydraulic cylinder has an impact chamber, a cavity which receives and diverts fluid, and a throat...
|
|
|
5794717 |
Rock drill percussion mechanism
A rock drill with a percussion mechanism which includes a piston, a body in which is formed a chamber, at least a first cylinder which is located in the chamber and which, on an inner side, forms...
|
|
|
5755292 |
Pressure medium operated impact mechanism
A pressure medium operated reciprocating impact mechanism has at least one working member (7) and at least one stop member (15), which are axially movable with respect to each other, and a working...
|
|
|
5680904 |
In-the-hole percussion rock drill
A hydraulic reciprocating percussion tool, particularly adapted for drilling applications, comprises an elongated cylinder, opposed fronthead and backhead members and a central bore in the cylinder...
|
|
|
5678641 |
Drilling and chipping tool
A drilling and/or chipping tool includes a housing (30) containing a guide tube (36) with a striking mechanism (28) located within the guide tube, with the guide tube and striking mechanism being...
|
|
|
5662174 |
Battery powered palm ratchet tool
A battery powered palm ratchet tool including a hemispherical palm grip. The palm grip has an upper body with a gripping ring and an under side interconnected to a stop. The upper body encases a...
|
|
|
5653294 |
Impact mechanism for a hammer drill
A hammer drill has a motor disposed in a housing, and the motor has a rotatable armature shaft. A pinion at an end of the armature shaft drives an axially displaceable intermediate gear mounted on...
|
|
|
5538089 |
Power tool clutch assembly
A power tool clutch assembly is provided. A first spindle is configured to rotate in a gear case. A drive clutch element is fixed to the first spindle. A second spindle rotates independently of the...
|
|
|
5533579 |
Shock preventive pneumatic tool as automatically shut off under no load condition
A pneumatic tool includes: a main cylinder having an operating lever for on-off control for the supply of compressed air into the pneumatic tool, a barrel member resiliently coupled to the main...
|
|
|
5531278 |
Power drill with drill bit unit capable of providing intermittent axial impact
A power drill includes a casing, a bit-carrying shaft provided with a front toothed member, a rear toothed member fixed on the casing, a driving unit, and a speed reduction device which...
|
|
|
5529132 |
Hydraulic control circuit for pile driver
A pile driver arrangement including a reciprocal impact member connected to a piston rod which is also connected to a reciprocal piston located in a hydraulic cylinder having a lower rod end and an...
|
|
|
5494115 |
Electric hammer drill
This invention relates to and electric hammer drill and in particular to one including a housing, a motor disposed in the housing, a trigger mounted in the housing and connected between the motor...
|
|
|
5450911 |
Safety arrangement for driving tools
A railroad spike driving tool (30) is adapted to be inserted by its shank (22') for cooperation into hand-held hammer machines of the type comprising a machine housing (10) with a cylinder (11), in...
|
|
|
5447205 |
Drill adjustment mechanism for a hammer drill
An adjusting mechanism for a hammer drill that will switch the drill from conventional drill only mode to a hammer drill mode by rotating an adjusting rod. The generally cylindrical adjusting rod...
|
|
|
5363835 |
Nose block assembly
In a rock-breaking apparatus of the type employing a striker pin and hammer providing shock absorbing means housed within the nose block to protect the nose block and its carrier from primary...
|
|
|
5337835 |
Drill and/or impact hammer
An impact hammer has a housing, a motor accommodated in the housing, an impacting mechanism accommodated in the housing and having a driver and a striker which is displaced by the driver in an...
|
|
|
5277259 |
Hammer drill with hammer drive action coupling
A power tool has a tool spindle, a hammer unit, a drive including a motor having a motor driven shaft, a motion conversion gear for generating reciprocating piston movement, and a disengageable...
|