Matches 1 - 50 out of 84 1 2 >
Match Document Document Title
7413027 Impact power tool with a precision controlled drive system  
An improved impact power tool for carving and engraving an article comprises an air delivery system operable to communicate with a pressurized air source; a drive assembly operable to receive air...
7140450 Percussion tool  
A percussion tool is described and which includes a housing mounting a tool bit; a reciprocally moveable hammer borne by the housing and which is operable to repeatedly strike the tool bit; and a...
7048073 Fastener installation systems  
A fastener installation tool to install fasteners, such as rivets, risers, standoffs, and other types of fasteners operates upon vacuum and air pressure. Fasteners are installed with minimal...
6966390 Pile hammer  
A power tool ( 1 ) has a percussive driving implement for driving an impact tool ( 8 ). The driving implement, which may be hydraulic or pneumatic, retracts the impact tool ( 8 ) on its return...
6691798 Variable hand pressure activated power tool  
A hand-held power tool for use in hand working operations including a hand pressure sensing element for adjusting the power of the tool. More specifically, the invention provides a hand engraving...
6672403 Method and apparatus for protecting a fluid-operated percussion device against no-load strokes  
Depending on the working and application conditions, it may be desirable to equip fluid-operated percussion devices with a mechanism that protects against no-load strokes, particularly in the...
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...
6520266 Percussion electrical hand-held tool  
A percussion electrical hand-held tool including a housing ( 10 ), a percussion element ( 2 ) located in the housing, and a planetary gear unit ( 5 ) located in the housing ( 10 ) for converting a...
6508315 Small impact power tool  
A hand-held pneumatic impact tool for use in fine hand working operations includes a mechanism for adjusting impacting characteristics of the device that is conveniently located and adjusted by the...
6488102 Hand-held pneumatic impact power tool  
A hand-held pneumatic impact tool for use in fine hand working operations includes a mechanism for adjusting impacting characteristics of the device that is conveniently located and adjusted by the...
6439317 Device for breaking concrete  
The present invention provides a device for breaking up a paved surface which attaches to a host transport, such as a skid steer or backhoe, having a hydraulic power supply and preferably comprises...
6334495 Fluid operated percussion device  
A fluid-operated percussion device ( 1 ) having a percussive piston ( 3 ), which alternately executes a work stroke and a return stroke due to the effect of a control. To avoid no-load strikes, in...
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...
6095256 Hand-held pneumatic impact tool and method of controlling the same  
A hand-held pneumatic impact tool and method of controlling the same for use in fine hand working operations includes a handpiece, a foot-operated flow control valve and a hand operated flow...
6029753 Increased efficiency percussion piston and method for operating same  
A percussion piston for use in a drilling apparatus includes a drill bit and at least three tubular parts which increase in diameter in a direction extending from the drill bit toward a rear end of...
5984021 Porting system for back chamber of pneumatic hammer  
A pneumatic downhole impact drill has a porting system for automatically supplying pneumatic pressure fluid from a fluid delivery tube received within an axial bore in the impact piston to the...
5715724 Adaptive, self-regulating forging hammer control system  
In forging hammers, according to the present invention, more than one inlet valve is employed and more than one exhaust may be employed. The force of impact for a particular blow is controlled by...
5662175 Sea water pile hammer  
A pile hammer for driving down hollow piles from an upper end thereof includes a hollow pile cap adapted to rest and support the hammer on a upper end of the pile being driven. The cap has an anvil...
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...
5515930 Handheld pneumatic power tool apparatus  
A handheld pneumatic power tool apparatus is provided for use with a supply of pressurized air. The apparatus includes a handpiece and a pressure regulator assembly for regulating the pressure of...
5419403 Pneumatic hammer  
A pneumatic hammer is provided which includes a working piston (16) movable in a working cylinder (22) and defining therewith front and rear cylinder working chambers (23, 24, respectively). The...
5407017 Hammer for removing gates or risers from castings  
An air-operated hammer is provided for removing risers or gates from castings. The hammer includes a piston having a rod to which an impact member is releasably latched. Operation of the piston is...
5086849 Apparatus useful in driving electrical ground rods  
Three tubular elements are rigidly bundled together so as to have, in use, a common upper end elevation. The first element is closed at its upper end by a rigid cap element and depnds from the...
4951757 Hydraulic striking device with impact frequency control  
In the hydraulic breaker according to the present invention, oil pressure at a fixed value always flows in the circuit at a low pressure side whenever the piston is raised or lowered, to prevent...
4817733 Hydraulic pile driver  
In a hydraulic pile driver (10), the lifting cylinder (34) acting on the driving weight (12) has an attached position indicator (46, 50), which produces a signal corresponding to the momentary...
4802538 Piling hammer  
A hammer for driving a pile into the ground has a cylindrical barrel and an anvil sealed to an end of the barrel, a hammer piston mounted for reciprocation within the barrel towards and away from...
4694912 Controlled impact power tool  
An impact power tool for delicate hand working operations is provided which is especially adapted for detailed engraving, carving, and delicate stone setting applications. The power tool preferably...
4693732 Piston vibrator  
A piston vibrator adapted for use in vibrating insulated structures through a rod or other vibration-transmitting structure, the vibrator including a piston slidably disposed in a cylinder defined...
4651833 Pneumatic impact tool  
A pneumatic impact tool wherein a two-stage piston is reciprocable in the two-stage chamber of a cylinder. The tool which is to penetrate into a bone is mounted in the front portion of the cylinder...
4645015 Powered impact instrument  
A powered impact instrument comprising a spring-loaded head mounted at one end of a housing; a spring-loaded striker mounted within the housing; a block which slides reciprocally within the housing...
4627627 Percussion or impact drill chuck  
A drill chuck is secured on a drill spindle so as to be actuated thereby. The drill chuck has an axial passage through which the impact effect of a central anvil shaft is transferred to the end of...
4534419 Method for pile driving and dragging  
A method and apparatus for guiding a body into the ground by means of a single hammer acted on by a reaction mass which is driven by a double-acting piston-cylinder unit via a controlled,...
4523646 Fastener driving tool  
A fastener driving tool includes a housing defining a handle portion and a head portion with a nose portion extending therebelow. Mounted within the head portion is a cylindrical sleeve within...
4401168 Impact applying mechanism  
There is disclosed an impact applying mechanism, particularly as applied in a subterranean drilling apparatus, and comprising a cylinder (13) arranged with its axis substantially vertical and...
4327485 Pistol grip tool  
A tool is disclosed which has a variable tool stroke useful for inserting a wire conductor into and along a conductor terminating slot of an electrical terminal of the type disclosed in U.S. Pat....
4278135 Variable volume pneumatic drill  
A Pneumatic impact drilling tool, particularly useful as a downhole pneumatic drill, includes a housing structure adapted to be connected to a string of drill pipe and supplied with compressed air...
4196780 Hydraulic percussion drill  
A percussion drill comprising a cylinder housing, a striker piston slidably accommodated within said housing, a shank rod slidably mounted within said housing, said shank rod being adapted to be...
4131164 Adaptive valve control system for an impact device  
Switch means on the frame of a forging device senses when the ram and piston enter a first zone of a pneumatic cushion during retraction to initiate timing. If a predetermined time has expired...
4109621 Internal combustion type pile driver  
An internal combustion type pile driver which has a cylinder, a ram adapted to slide within this cylinder, an anvil fitted into the bottom end of the cylinder and an air intake/exhaust port fixedly...
4086968 Pile driver  
In a pile driving hammer including a striker elevatable on guides by fluid pressure delivered to an operating fluid cylinder, and capable of being dropped to deliver a pile driving blow by...
4062411 Hydraulic percussion tool with impact blow and frequency control  
A hydraulic percussion tool for developing repeated impact blows for rock drilling and other high force applications is characterized by a piston hammer reciprocably disposed in a cylinder bore and...
4050526 Post driving machine  
A portable hydraulic actuated machine for driving posts, ground anchors, concrete breakers, core drills and the like work pieces into the ground, pavements, or wall structures, maintains a...
4006783 Hydraulic operated rock drilling apparatus  
A rock drilling apparatus comprises a hydraulically rotated drill, a percussion motor having a piston which transfers impact energy to the drill, the piston defining together with the machine...
3995700 Hydraulic rock drill system  
In a hydraulic percussion rock drill the operation of the working fluid distributing valve is controlled to effect a variation in percussive blow energy and blow frequency by varying the piston...
3990522 Rotary percussion drill  
A drill housing is pivotally connected to the forward end portion of a boom member that swings upwardly from a frame of a mobile drilling machine. A hydraulic motor is secured to the gear housing...
3924690 Percussion drill control means  
The impact delivered to the bit of a fluid-powered hammer-type drill, especially a down-the-hole rock drill, is automatically adjusted in accordance with the load on the bit so as to maintain...
3838741 PILE HAMMERS  
Power hammer for driving piling, and the like, free of valve mechanism likely to require attention and comprising a working cylinder having an anvil at the lower end of the same and a ram operative...
3788403 POWERED IMPACT TOOL  
A powered impact tool, such as an automatic hammer, chisel, star drill, or the like, is provided which comprises a spring loaded anvil mounted at one end of a housing; a spring loaded plunger, or...
3780814 SETTING DEVICE FOR THE STROKE POSITION OF A RECIPROCATING TOOL  
A reciprocating tool, such as a stamping or nibbling die, has an adjustment which is driven by an electric motor. An electromechanical, photoelectric, or air pressure checking device checks the...
3695365 TORQUE AND IMPULSE TRANSMITTING MACHINE  
A torque and impulse transmitting machine with a built-in motor wherein the tool supporting spindle receives impulses from a rotary impeller gear which drives the spindle in response to rotation of...
Matches 1 - 50 out of 84 1 2 >