Matches 1 - 50 out of 103 1 2 3 >


Match Document Document Title
8955612 Fence post driver  
A driver 10 for a fence post is disclosed. The driver comprises an elongate hollow body 12 having an open in-use lower end 14. A guide 16 is removably locatable at the lower end.
8936105 Electric motor driven tool for orthopedic impacting  
An orthopedic impacting tool comprises a motor, an energy storage chamber, a striker, and an anvil. The motor stores energy in the energy storage chamber and then releases it, causing the striker...
8844646 Integrated cylinder and reversing assembly of a reciprocating pneumatic tool  
An integrated module of a cylinder and reversing assembly of a reciprocating pneumatic tool is arranged between an air pressure control module and a guide outlet of a piston rod in a groove of the...
8789283 Reciprocating saw  
A reciprocating saw includes a motor and a drive shaft driven by the motor. The drive shaft defines a longitudinal axis. The reciprocating saw also includes a wobble plate coupled to the drive...
8733467 Rock drilling machine and axial bearing module  
A rock drilling machine equipped with an axial bearing having at least one axial piston for setting the axial position of a drill shank and for damping stress pulses returning from the rock. The...
8640787 Portable post driving apparatus  
An improved valve for a portable post driver. The post driver has an inner hollow cylinder open at both ends and adapted to receive a post through a lock clamp located at its lower end. An outer...
8636088 Rock drilling machine and axial bearing module  
A rock drilling machine and an axial bearing module. The rock drilling machine is equipped with an axial bearing having at least one axial piston for axially positioning a drill shank and for...
8540034 Pneumatic drill device  
Pneumatic drill device comprising an outer casing, an assembly of a cylinder and a movable piston actuating a pick element, a device for supplying the cylinder with compressed air, an air exhaust...
8534376 Pneumatic-spring percussion mechanism with a variable rotary drive  
A percussion mechanism that has a motor, a drive piston which can be moved to and fro in a guide cylinder by the motor, and a percussion piston. A coupling device is active between the drive...
8490715 Hand-held machine tool  
The invention relates to a hand-held machine tool, in particular a hammer drill and/or chipping hammer. The tool according to the invention has a transmission device with a drive bearing that has...
8464806 Fastening tool with depth of drive adjustment  
The tool comprises an engine for propelling a piston including a shaft for driving a fastening member into a supporting material and through a pin guide, with means for adjusting the depth of...
8292003 Handheld tool with a linear oscillating drive  
A handheld tool with a pneumatically operated linear oscillating drive is provided. The handheld tool has a motor housing and a piston movable in the motor housing, which separates the two working...
8210274 Vibration hammer  
A vibration hammer is provided, including a main body; a striking unit having a piston housing installed to be elevated by a hydraulic pressure controlling valve unit installed in the main body, a...
8191649 Impact screwdriver having a shaft locking device  
The present invention provides both an impact switching function and a shaft locking function for use in an impact screwdriver. The impact screwdriver includes a housing, a motor located in the...
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...
8156655 Pneumatically powered pole saw  
A pneumatically powered pole saw, comprising: an extendable pole; a head member secured to the extendable pole; a cutting blade movably mounted to the head member; a piston linked to the cutting...
8122972 Drive mechanism for a power tool  
A hollow piston drive mechanism for a hammer drill comprises a crank pin 54 having a cylindrical link member 68 rigidly connected to a part-spherical bearing 70. The part-spherical bearing 70 is...
8061434 Percussion device  
A method for controlling the operation of a pressure fluid operated percussion device and to a pressure fluid operated percussion device. The method includes influencing the shape of a stress wave...
7828072 Impact tool  
An impact tool for simultaneously providing a rotational force and an impact force to an object has an output shaft rotated by a motor, hammer for intermittently providing an impact force to the...
7823654 Electric post driver  
An impact driver for driving elongate objects into a body has, a chassis, a ram supported by the chassis in a manner allowing rectilinear movement of the ram relative to the chassis between two...
7735575 Hammer drill with hard hammer support structure  
A drill housing supports an output spindle comprising a material that is relatively soft. The non-rotating hammer member can be mounted around the output spindle, adjacent its forward end, and...
7677325 Pneumatic tool  
The invention of this application provides a pneumatic tool with a simple structure. The tool has a tubular housing, a stationary shaft, a first piston slidable along the stationary shaft, a...
7677327 Percussion mechanism for a repetitively hammering hand power tool  
A percussion mechanism for a repetitively hammering hand power tool in the form of a rotary hammer has a striker movable axially forward and backward in a guide barrel and imparting impacts...
7654338 Powered hammer having beat piece with lubricant seal  
A powered hammer includes a housing, a tool holder coupled to the housing and configured to hold a tool, a motor within the housing, a piston slideably mounted within the housing, a drive...
7628220 Impact motorized wrench  
An impact motorized wrench includes a tool-holder shaft arranged on a front side of the wrench and pivoting around a rotation axis, a rotary motion producing motor unit arranged on a rear side of...
7581599 Percussive device for a rock drilling machine, method for achieving a reciprocating piston movement and rock drilling machine  
A percussion device (1) with a reciprocating percussion piston (3), includes a first chamber (5) that can be pressurized for forward driving of the percussion piston (3) and a second chamber (8)...
7516801 Impact mechanism for a repeatedly striking hand-held machine tool  
A percussion mechanism for a repetitively hammering hand power tool, whose striking frequency and striking intensity are controllable independently of one another, has a striker (2), movable...
7503923 Impact head assembly for percussive therapeutic device  
An impact head for a chiropractic adjustment tool or tapper that is easy to install, remains stable during lateral movements and easily exchangeable. The impact head comprises a central bore...
7398835 Rotary hammer having both a reciprocating hammer mechanism and a ratcheting hammer mechanism  
A rotary hammer incorporating both a reciprocating drive for generating a first hammering action transmittable to a tool bit and ratcheting mechanism for generating a second hammering action...
7191847 Drive for a motor-driven hand-held tool  
A drive for a motor-driven hand-held tool includes a motor (17) and a gear mechanism (20) for converting a rotational movement of the motor (17) into a reciprocating movement of the reciprocating...
7191848 Rolling hammer drill  
A hammer drill with rolling contact at the contact surfaces for transmission of axial force between a drive shaft and wave race. By using roller bearings, line contact is obtained. The area of...
7168169 Anti-rotation drive mechanism for a reciprocating saw  
An anti-rotation reciprocating drive apparatus for a reciprocating saw utilizes a wobble plate assembly that includes a drive shaft and an elongated arm with an interface structure for engaging a...
7143840 Impact tool  
An impact tool enables a front cover part to be easily attached to and detached from a housing body, with a device having a simplified structure. The front cover part has an annular fastening...
7121360 Hand-held power tool  
A hand-held power tool includes a percussion mechanism (3) arranged in the tool housing (2), and a motor (4) for driving the percussion mechanism and connected therewith by a gear unit (5), with...
7096972 Hammer drill attachment  
Power tools of the type under consideration include hammer drills, for example, which are electric or battery powered and includes two modes of operation: a rotation mode and a rotation-hammer...
7073608 Power tool  
A portable tool comprising a spindle defining a longitudinal axis, a spring extending around the spindle in the axial direction for biasing a component of the tool, a stop ring extending around...
7059423 Jackhammer system  
A jackhammer system for reducing the vibration and noise experienced by an operator of the jackhammer. The jackhammer system includes a housing, a chisel movably positioned within a lower neck of...
7025183 Pneumatic spring percussion mechanism with an electro-dynamically actuated driving piston  
The invention relates to a pneumatic spring percussion mechanism comprising a driving piston moving back and forth in a housing of the percussion mechanism and a percussion piston, wherein a...
6955230 Hammer drill and/or chipping hammer  
The invention is based on a hand power tool, in particular a drill- and/or chipping hammer, comprising a striking mechanism (10) that has a drivable pot-type piston (12) with at least one idle...
6926095 Power tool transmission device  
A power tool transmission device includes a base, a switch portion, a vibration member, a press portion, a transmission shaft and a casing. When the projections press the position plates, bosses...
6907942 Percussion tool  
In a percussion tool such as an electric hammer or a hammer drill in which the axial direction of a motor 8 is substantially perpendicular to that of a tool bit 1 attached to a tool holder 2, a...
6868918 Power tool driven by linear motor  
A power tool includes a linear motor and a maximum reciprocal movement amount setting unit. The linear motor has a movable member driven to move reciprocally and a tool connector for connecting...
6863134 Rotary tool  
A rotary tool, such as an impact wrench, includes a housing having a forward end and supporting a motor. The motor has a motor shaft extending axially through the housing and defining an axis. The...
6789630 Electric hand tool  
The present invention relates to an electric hand tool, in particular a drill or a screwdriver, comprising a housing, an electric motor accommodated therein and having a motor shaft, a tool shaft...
6742266 Miniature reciprocating saw device  
A small reciprocating saw device is provided which is adapted for one hand operation and which enables delicate sawing or filing work to be carried out. An eccentric drive arrangement includes a...
6712156 Switch assembly for a combined hand tool device  
A switch assembly (1) for centrally arranged operating mode selection for an at least partially rotary and percussion combination hand tool device (2) is comprised of a first switch sleeve (11)...
6705408 Power tool with a linear motor  
A power tool has a linear motor which includes a movable element having a tool mounted on its one end and having magnotic poles installed at a fixed pitch along the direction of movement, magnetic...
6695070 Magnetic impact device and method for magnetically generating impact motion  
A magnetic impact device includes at least one hammer relatively movable with respect to at least one chuck. One of the at least one hammer and the at least one chuck has at least one magnet....
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 a...
6626247 Mechanism to fasten adaptors to a head portion of a post driver  
The present invention provides a post driver which includes various post adaptors having different cross-sections. The post adaptors can be attached to, and detached from, a head portion of the...

Matches 1 - 50 out of 103 1 2 3 >