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7614460 |
Impact tool with a movably supported impact mechanism
A portable power tool includes a housing, and an impact mechanism movably supported in the housing and having a front opening for receiving a working implement and a hammer piston for delivering...
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7604071 |
Power tool with vibration reducing means
The invention provides a power tool which includes a tool bit, a first operating mechanism that linearly drives the tool bit and thereby causes the tool bit to perform a predetermined operation,...
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7591325 |
Portable hand-guided power tool
A portable hand-guided power tool has a housing and a handle having a first leg and a second leg, wherein the handle is secured by the first and second legs to the housing such that the handle is...
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7540336 |
Vibration isolator for a pneumatic pole or backfill tamper
A vibration isolation assembly is provided for use with a backfill tamper. In use, the vibration isolation assembly can be disposed between a handle and a percussion mechanism of the tamper and...
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7533736 |
Vibration reduction apparatus for power tool and power tool incorporating such apparatus
A vibration reduction apparatus for use with a hammer tool having a hammer piston is disclosed. The hammer piston is caused to reciprocate in the cylinder by rotation of a gear wheel and crank...
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7523791 |
Impact power tool
An object of the invention is to provide an improved technique for lessening an impact force caused by rebound of a tool bit after its striking movement in an impact power tool. The representative...
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7500527 |
Hand-held power tool with a decoupling device
A hand-held power tool includes a spring-mounted decoupling device ( 16 ) for supporting a tool handle ( 14 ) on a tool housing ( 4 ) and having a first support arrangement ( 18 ) including a...
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7455121 |
Power tool
A power tool includes an impact damping mechanism for damping an impact in a direction of rotation of a speed reduction mechanism portion 8.
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7438140 |
Shock attenuating device for a rotary impact tool
A shock attenuating coupling device is provided for a rotary impact tool for drivingly connecting a hammer mechanism to a drive anvil. The shock attenuating coupling device includes a first...
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7401661 |
Lubricant pump for powered hammer
A vibration reduction and lubricating mechanism for a powered hammer includes a power driven piston in a cylinder that reciprocatingly drives a ram, which repetitively strikes a beat piece, which...
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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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7377331 |
Damping driving axle
A damping drive axle includes an output shaft divided into a first portion and a second portion, a mounting seat having a centrally defined hole, a first compartment to correspond to and receive...
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7357195 |
Power tool and gear unit assembled therein
A power tool including a gear unit provided with a load moderating mechanism capable of reducing noise and prolonging service life. A coupling is force fitted with a spindle at a predetermined...
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7357194 |
Percussion power tool
A percussion power tool includes a motor ( 6 ) located in the tool-housing ( 4 ) for driving the output member ( 12 ) and the percussion mechanism ( 10 ), a chuck ( 20 ) for receiving a working...
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7331408 |
Power tool housing
A transmission housing for a hammer drill comprises two clamshell halves and that mate to define a first transmission housing chamber and a second transmission housing chamber disposed on either...
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7287679 |
Powder activated setting tool piston retainer arrangement and method
Disclosed herein is a powder actuated setting tool piston retainer arrangement which includes a housing and firing mechanism and a piston having a piston retaining ring in operable communication...
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7152695 |
Power tool with air seal and vibration dampener
A power tool is provided including a resilient boot having a radial flange mounted in a seat formed by housing halves in order to provide a sealed barrier segregating air of an inlet vent of a...
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7118018 |
Fan motor suspension mount for a combustion-powered tool
A motor mount for suspending a fan motor in a combustion-powered tool includes an inner ring for securing to the motor, an outer ring that is secured to a portion of the tool, and a web portion...
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7080958 |
Vibratory pile driver/extractor with two-stage vibration/tension load suppressor
A method and apparatus for driving and extracting piles that includes a vibration/tension load absorber assembly mounted between a housing and the vibratory unit which includes shear-type vibration...
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7070009 |
Vibration isolation mount system (ISO)
A power tool includes vibration isolation material positioned between an engine shroud and a drive shaft housing. The vibration isolation material isolates the drive shaft housing from engine...
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7032683 |
Rotary hammer
A rotary hammer and a power tool. The rotary hammer is operable in an idle mode and a hammer mode and comprises a housing and a barrel positioned in the housing and having a forward portion. A ram...
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6964362 |
Shock-absorbing system for fastener driving tools
A combustion chamber assembly for use in a combustion-powered fastener driving tool, includes a cylinder body, a reciprocating probe assembly slidably disposed relative to the cylinder body between...
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6948571 |
Hammer
An electrically powered hammer comprising a hollow spindle within which spindle is reciprocatingly mounted a piston, a ram, a beatpiece having an increased external diameter mid-portion and located...
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6938705 |
Striking tool
A projected portion provided at a cylinder and projected in a radius direction is formed at an end face thereof on a side of a tool holding portion, and a holding portion on one side of holding...
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6810969 |
Hand machine tool
The invention is based on a hand power tool, in particular a drilling- and/or chipping hammer, having a machine housing ( 12 ), a tool guiding element ( 16; 54 ), a hammer tube ( 14; 52 ), and a...
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6779699 |
Pneumatically operated nail gun having cylinder floating prevention arrangement
A pneumatically operated nail gun having an arrangement for preventing a cylinder from floating due to impact of a piston against a piston bumper. When the piston is pneumatically moved toward its...
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6779698 |
Abrasion-resistant bumper for a nail-driving tool
A nail-driving tool includes a cylinder defining a chamber for reciprocatingly receiving a piston. A bumper is received in the chamber and includes a first bumper section and a second bumper...
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6705409 |
Reciprocating tool having a piston retaining system
Disclosed is a reciprocating pneumatic tool including first, second and third piston retaining mechanisms for preventing the piston from freely exiting the barrel of the tool when the retaining...
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6702037 |
Post pounder having lateral impact resistant floating anvil
A pile and/or post pounder utilizing a tracked floating anvil and having a continuous loop for lifting a tracked hammer. The pounder is adapted to be transported on, and powered by the hydraulic...
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6691797 |
Device for driving piles
A device for use in combination with a pile driving apparatus for driving piles into the ground. The device ( 1 ) including a main body ( 13 ) which carries side grippers ( 18 ) and ( 19 ) each of...
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6679411 |
Piston retention system for a fastener driving tool
In a fastener driving tool, a retention system for a piston comprises a buffer and a set of bearings in a cage, the bearings being abutted against the buffer. The buffer provides a force urging the...
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6675908 |
Drilling hammer or impact hammer
A drill hammer or riveter, includes a housing ( 11 ), in which a hammering mechanism ( 12 ) is accommodated that in an axially displaceably supported guide tube ( 13 ) has a reciprocating piston (...
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6662990 |
Buffer apparatus of electrical nailing gun
A buffer apparatus of a nailing gun, which controls the air flow in and out a chamber of a main body of the nailing gun, reduces the vibration of the nailing gun when nailing. The air will flow in...
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6648079 |
Protective apparatus for preventing the infiltration of contaminants in a fluid-operated percussion device
A protective apparatus for preventing the infiltration of contaminants in a fluid-operated percussion device, having a striking tool ( 3 ) that is guided to move in a housing ( 2 ) and is driven by...
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6637520 |
Component mounting method and apparatus for a percussion tool
There is provided a hammer assembly ( 10 ) comprising a hammer casing ( 11 ) having a bore ( 12 ) therethrough and a drive sub ( 13 ) and retainer ( 15 ) supporting a drill bit ( 14 ). A piston (...
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6619527 |
Combustion powered tool suspension for iron core fan motor
A suspension mechanism for a motor of a combustion chamber fan in a combustion powered hand tool constructed and arranged for driving a driver blade to drive a fastener into a work piece, the tool...
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6601655 |
Piercing apparatus
A piercing apparatus compact in size having a decreased number of hoses is suited for use as an iron runner port-opening machine for a blast furnace or the like furnace in an iron mill. The...
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6581524 |
Conversion device for converting a rotational motion into a reciprocal motion
A conversion device that is structured to be coupled to the rotating axle of a motor and to an output assembly. The output assembly has an elongated shaft with an axis extending generally...
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6561285 |
Breaking apparatus and tool
A breaking apparatus, which comprises a percussion device ( 1 ), and in the extension thereof, a tool ( 3 ) to which a percussion piston ( 2 ) belonging to a percussion device delivers impacts. In...
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6510904 |
Protected tool bushing for an impact hammer
An improved bushing for a heavy duty hydraulic hammer provides increased bushing life and provides cooler operation for the hammer. A Polymeric bushing is positioned near the lower end of the tool...
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6464018 |
Portable handheld drilling machine having an internal combustion engine
The invention relates to a portable handheld drilling machine having an internal combustion engine ( 21 ) and a transmission ( 2 ) accommodated in a housing ( 3 ). The output shaft ( 4 ) of the...
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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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6318239 |
Nailer and bumper provided therein for braking impact piston
A bumper for braking an impact piston is disposed at a lower part of an impact clinder for sidably housing the impact piston. The impact piston has a driver for driving a fastener and having a...
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6315060 |
Collet assembly for power tools
A collet assembly is provided that securely holds tool bit shafts therein while allowing them to be readily and easily interchanged. The collet assembly herein has a very few number of parts and is...
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6234256 |
Power screw driver with damping device between covered grip and housing
A tool, in particular a power screw driver, comprises an output shaft which is rotatably mounted in a housing and is driven by a motor. The output shaft extends substantially coaxially to a...
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6227307 |
Sound and dust proof breaker
A hydraulic breaker for absorbing and reducing vibration and noise generated from the breaker and for reducing debris and dust scattered from the impact tool during using the breaker is provided....
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6192997 |
Pneumatic hammer with buffers
A pneumatic hammer has a housing, a handle, an air passage, a sleeve, a cylinder, an actuating head, a reciprocating valve and two buffers. The handle extends from the housing. The air passage is...
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6186246 |
Method for adjusting drilling of drilling machine and rock drill
A method for adjusting percussion pressure and a drilling machine. In the method the percussion power of a drilling machine is adjusted by moving a shank in the longitudinal direction of the...
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