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| Number | Title | Issue Date |
| 7469751 | Pneumatic hammer A pneumatic hammer comprises an elongate hollow casing with operatively upper and lower ends and has a piston slidingly received within the casing and operable to reciprocate within the casing between upper and lower pressure chambers defined within the casing. The ... | 12/30/2008 |
| 7290691 | Pneumatic nail gun A pneumatic nail gun has a gun body having a main air housing; a cylinder fixed in the main air housing; a hitting piston slidably movable in the cylinder; a dish-shaped piston disposed at a top end portion of the cylinder; an upper slidable sleeve valve disposed at... | 11/06/2007 |
| 7267512 | Power assisted drill press A power assisted drill press having a feed cylinder fed by a variable pressure regulator which allows a user to controllably feed a bit and work material together while activating a drill motor to rotate the bit. An embodiment of the power assisted drill press utili... | 09/11/2007 |
| 7255257 | Pneumatically operated power tool having mechanism for changing compressed air pressure A pneumatically operated power tool such as a screw driver, a nail gun and an impact wrench those being driven by a pneumatic pressure. A pressure reduction valve is provided between a connector connected to a compressor and a compressed air chamber defined in an ou... | 08/14/2007 |
| 7165478 | Pneumatically operated screw driver A pneumatically operated screw driver ensuring a complete return of a piston to its top dead center. The screw driver has a compressed air return chamber for returning the piston to its top dead center by applying a compressed air in the return chamber to the piston... | 01/23/2007 |
| 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 the piston from the hydraulic oil. The gas in the gas chamber is compr... | 01/02/2007 |
| 7108459 | Power assisted drill press A power assisted drill press having a feed cylinder fed by a variable pressure regulator which allows a user to controllably feed a bit and work material together while activating a drill motor to rotate the bit. An embodiment of the power assisted drill press utili... | 09/19/2006 |
| 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 reactive forces to the operator's hand, thus reducing the risk of repetitiv... | 05/23/2006 |
| 7028784 | Motor-driven hand-held tool with functional step display A motor-driven hand-held tool includes a housing (4) having a switching recess (6) formed therein, an actuation member (8) displaceably arranged in the switching recess for shifting a functional unit between different functional steps, and and a... | 04/18/2006 |
| 7025150 | Air inlet for pneumatic tools An improved air inlet for pneumatic tools allows an air supply duct to supply compressed air smoothly to a pneumatic tool when in use at changing directions or angles without tangling with the pneumatic tool and affecting operation efficiency. The improved air inlet... | 04/11/2006 |
| 7007762 | Power tool It is an object of the present invention to provide a technique to increase efficiency of the output torque of the blushless motor to drive a power tool. A representative power tool may comprise a tool bit, a brushless motor to drive the tool bit, a battery to opera... | 03/07/2006 |
| 6961983 | Tooling for rivet gun Method and apparatus of back riveting construction for sections of aircraft structure utilizing the flush riveting wherein the back bar tooling for all the rivets in the entire section is a single piece of stationary tooling which conforms to the exterior shape of t... | 11/08/2005 |
| 6961982 | Rivet gun Method and apparatus of back riveting construction for sections of aircraft structure utilizing the flush riveting wherein the back bar tooling for all the rivets in the entire section is a single piece of stationary tooling which conforms to the exterior shape of t... | 11/08/2005 |
| 6959967 | Hammer with high pressure shut-off A fluid-powered impact vibrator (5), in particular a hydraulic hammer, comprising a fluid-powered percussion hammer (8) with a percussion piston (18) that is moved back and forth under the effect of a control means (10) and comprising a g... | 11/01/2005 |
| 6941627 | Adaptable fastener installation tool A system for installing fasteners into a workpiece. The system includes a fastener orientation system and an installation unit. The fastener orientation system receives the fastener from a fastener delivery tube and retains the fastener in a holding jaw. Specificall... | 09/13/2005 |
| 6926186 | Fastener insertion device A fastener insertion device includes an actuator that is either pneumatic or manually operated. The fastener insertion device is illustratively configured to receive either a staple magazine or a stake magazine. The stake magazine can house stakes of different dimen... | 08/09/2005 |
| 6923268 | Electric rotational tool driving switch system An electric or power rotational tool including a driving switch of a push operating system that switches the electric motor ON when the rotational tool contacts a work object such as a screw, etc. and is displaced by being pressed, and a driving switch of a lever op... | 08/02/2005 |
| 6904980 | Linerbolt removal tool A pneumatic linerbolt removing tool including a moil supported for reciprocal movement along a hammer axis within a housing, an inertial body movably mounted along the hammer axis, and a piston assembly moveable within the inertial body along the hammer axis between... | 06/14/2005 |
| 6851343 | Screwdriver A representative screwdriver may comprise a motor, a body, a first spindle, a first clutch member, a tool bit, a second spindle, a second clutch member, a clutch engagement preventing member. The representative screwdriver may be selectively operated in one of a fir... | 02/08/2005 |
| 6741051 | Power tool trigger control A trigger controller for an electric power tool including a motor and a pull-trigger movable along a path having a foremost home position comprises a mechanical switch and a solid-state switch connected in series to the motor, wherein the mechanical switch includes ... | 05/25/2004 |
| 6341482 | Cutting blade for reaper A cutting blade is provided for a reaper which can easily position members to be welded, can reduce a welding distortion, can fully ensure the strength of a shank member and can easily be manufactured. The cutting blade comprises a bar-shaped shank member... | 01/29/2002 |
| 6192995 | Rotary impacting apparatus A rotary impacting apparatus is provided that includes a housing, a rotor rotatable about an axis, a main reciprocative implement and an impact member. The impact member is arranged to exert an impacting force on the main reciprocative implement when the ... | 02/27/2001 |
| 5992536 | Hydraulic drive tool controlling apparatus When a start SW 3 is pressed, a one-shot multivibrator circuit 15 turns on and releases a pulse. The pulse is transmitted to a self-hold circuit 16 which in turn stays in self-hold mode and releases an H level output continuously until it is reset. This c... | 11/30/1999 |
| 5944117 | Fluid actuated impact tool An improved fluid actuated percussive impact tool of the valveless type adapted for down hole drilling is provided. The impact tool includes a casing, a back head, a distributor located at a first end of the casing, and an impact receiving device located ... | 08/31/1999 |
| 5918685 | Hand tool A hand tool (1) having a drive motor (12), a depth stop (16) by which the drive motor (12) can be automatically switched off when it is in contact with a workpiece (4), and a switching mechanism (21) in an electric circuit (22). The electric circuit (22) ... | 07/06/1999 |
| 5853052 | Hydraulic drive for rotation of a rock drill The invention provides an In-The-Hole hydraulic drive unit for rotating a rock drill. A hydraulic motor having a fixed rear trailing end and a rotating front drilling end converts hydraulic power into a rotational drive force. The hydraulic motor receives... | 12/29/1998 |
| 5797463 | Pneumatic hammer A pneumatic hammer comprises a rigid unit of construction, which comprises a housing, a handle, an operating cylinder resiliently supported in the housing, and a tool holder for receiving a tool movable in a striking direction by the operating cylinder. T... | 08/25/1998 |
| 5701961 | Electronic push to start nutrunner A latching magnetic switch is utilized to activate a push to start nutrunner or the like wherein the magnetic latching switch is deactivated first by one magnetic pole and thereafter upon engagement with the work piece and compression of the spindle and o... | 12/30/1997 |
| 5573073 | Compressed fluid operated tool with fluid metering device A vibration dampened percussive tool has a handle assembly and a cover surrounding a barrel and piston assembly which are caused to oscillate relatively to the handle assembly. The barrel assembly receives a tool retainer and a trigger controls primary ai... | 11/12/1996 |
| 5488997 | Rotary impacting apparatus A rotary impacting apparatus comprises a housing, a rotor rotated in the housing, an impact member eccentrically held by the rotor, and a main reciprocative implement held reciprocatively at a forward end portion of the housing. The rotor rotates to hit t... | 02/06/1996 |
| 5417294 | Pneumatic hammer A hammer of the type having an impact tool driven by pressurized fluid has a hammer body portion with a closed rearward end and an open forward end and a piston longitudinally movably housed within the hammer body portion for striking a tool mounted at th... | 05/23/1995 |
| 5360073 | Battery type screw driver A battery type screw driver has an auxiliary switch 39 in addition to a main switch 37. A clutch 30 is provided between a driving shaft 16 and a driven shaft 11. A central bore 32 is formed along the central axis of the driving shaft 16. The operation bar... | 11/01/1994 |
| 5320187 | Mechanical lockout for a pneumatic tool The invention is a safety mechanism for an air-powered tool. The mechanism senses the position of the tool's implement retainer and disables the air flow to the tool's motor if the retainer is not in its locked position. The mechanism employs a pushrod th... | 06/14/1994 |
| 5094133 | Screwdriver with switch-off means for screw-in depth and screw-in torque To improve a power-operated screwing tool machine comprising a drive arranged in a housing, a screwing tool and a switch-off means for the screw-in depth including a depth stop held on the housing for fixing a screw-in depth and a clutch arranged between ... | 03/10/1992 |
| 4688645 | Pressure medium operated impact tool A hand-held impact tool operated by a pressure medium includes a work cylinder, a piston movable in the work cylinder by the pressure medium, and an impact member. A pressure medium container, preferably a CO2 -cartridge, is immediately attache... | 08/25/1987 |
| 4583601 | Hammer drill A "hole bottom" hammer drill comprising a tubular body (1) supplied with compressed air, a drill bit (3) and a percussion piston (38) caused to move in an inner cylinder (7) by a mechanism distributing compressed air alternately below and above the piston... | 04/22/1986 |
| 4552227 | Reciprocating linear fluid motor Hydraulic fluid pressure moves a piston (22) against a body of incompressible fluid (14), compressing a spring (42). The pressure is released, and the force of the stored energy in the spring (42) is transmitted to the piston (22) by the body of fluid (14... | 11/12/1985 |
| 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 which is reciprocally mounted a drive piston. A driver for dri... | 06/18/1985 |
| 4497377 | Pneumatic tool A pneumatic tool is disclosed for use in puncturing or hammering applications, particularly cattle stunning and the like. The tool generally comprises a cylinder, a piston slidably mounted in the cylinder, a hammer or striker connected to the piston, an air ma... | 02/05/1985 |
| 4453773 | Pavement breaking apparatus Apparatus for breaking concrete and asphalt pavement and the like comprising a frame adapted to be supported by and above pavement to be broken. Power operated means move the frame in one and opposite directions relative to and in parallel relationship wi... | 06/12/1984 |
