Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
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| Number | Title | Issue Date |
| 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 a stepped configuration. A control device varies a stroke of the str... | 04/10/2012 |
| 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 bit movably coupled with the casing and a piston movably disposed wit... | 08/09/2011 |
| 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 rubber primary seal and an upper fluid-diverging lid for the fluid-driv... | 09/23/2008 |
| 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 substantially at impact. It is the impact itself of the piston against the ... | 09/09/2008 |
| 7338051 | Tool holder for a rotary hammer A tool holder (1) for a rotary hammer which has a tube like tool holder main body (10) having a side wall formed with through holes (11) for receiving corresponding locking bodies (12) and formed with additional through holes (40).... | 03/04/2008 |
| 7325711 | Electrically operated drive-in tool A drive-in tool drives in fastening elements and includes a driving ram and a drive unit. The driving ram is displaceably supported in a guide. The drive unit has a drive flywheel and a return device. The drive flywheel is set in rotation by an electric motor, and t... | 02/05/2008 |
| 7322506 | Electric driving tool with driver propelled by flywheel inertia A tool with a driver, which is translatable along a driver axis, and a motor assembly having an electric motor, a flywheel, a roller and an actuator. The electric motor is selectively operable for driving the flywheel. The actuator is selectively operable for transl... | 01/29/2008 |
| 7308949 | Concrete drill A concrete drill for drilling concrete or the like by a diamond bit (5) attached to a front end of a bit drive shaft (4) projected forward from a main body (1) by driving to rotate the bit drive shaft (4) by a drive source (2) cont... | 12/18/2007 |
| 7258349 | Hand power tool A hand power tool selected from the group consisting of a drill hammer and an impact hammer has an exchangeable tool holder, a guide pipe which receives the tool holder at its free end, a locking device arranged on the guide pipe and operative manually for fixing th... | 08/21/2007 |
| 7252158 | Pilot valve for a pneumatic tool A pneumatic tool (20) for impacting a workpiece (22) is provided. The tool (20) comprises a casing (42) defining a chamber (48). A piston (54) is slidable within the chamber (48) along an operational axis (A). An exha... | 08/07/2007 |
| 7237706 | Drop hammer Embodiments of the present invention pertain to a drop hammer comprising a load, an actuator connected to the load, and a fluid circuit that is connected to the actuator and is connectable to a fluid source, such as a source of hydraulic power. The fluid circuit is ... | 07/03/2007 |
| 7220211 | Multispeed power tool transmission A multi-speed transmission assembly for a rotary power tool. The transmission assembly includes a plurality of transmission stages, with at least two of the transmission stages employing a movable reduction element that permits the transmission stage to be operated ... | 05/22/2007 |
| 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 includes a hammer slidably coupled to a lead, a lead mounting assembly ... | 04/03/2007 |
| 7165663 | Power screwdriver with low-noise torque clutch A power screwdriver (1) with a rotationally driven, axially displaceable mounted tool spindle (2) with a low-noise torque clutch (3) which comprises a ratchet-spring biased ratchet coupling (6) driven by a driven ratchet part (12) ... | 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 |
| 7152692 | Hydraulic hammer having a sealing bushing A hydraulic hammer having a sealing bushing includes a percussion piston that delivers strokes to a tool. A lower part of the percussion piston is sealed with respect to a frame by the sealing bushing, which includes one or more lower seals. The sealing bushing does... | 12/26/2006 |
| 7131503 | Impact driver having a percussion application mechanism which operation mode can be selectively switched between percussion and non-percussion modes An impact driver capable of boring and having an excellent usability is provided. An anvil(8) is arranged so as to slightly move in the axial direction. A first cam(29) having cam gears(30, 30 . . . ) is externally provided at the anvil so as to... | 11/07/2006 |
| 7124839 | Impact driver having an external mechanism which operation mode can be selectively switched between impact and drill modes An impact driver in which a drill mode can be selected without fail is provided. In a hammer case, a connecting sleeve is provided so as to be slidable back and forth. At the backward position, the connecting sleeve engages with only a first engaging tooth provided ... | 10/24/2006 |
| 7101300 | Multispeed power tool transmission A portable power tool with a housing, a motor having a motor output member, a driven member and a transmission. The transmission, which is located in the housing, is configured to receive a rotary input from the motor output member and to produce a rotary output tha... | 09/05/2006 |
| 7077217 | Hammer An electrically powered hammer is provided comprising a housing, a spindle, a hammering mechanism including a piston reciprocatingly mounted within the spindle, a wobble drive arrangement reciprocatingly connected to the piston, a trunnion arrangement including a cr... | 07/18/2006 |
| 7073605 | Impact drill An impact drill includes a first ratchet rotating along with a spindle and movable in an axial direction, a second ratchet engaged with the first ratchet and movable in a axial direction but unrotatable, and a spring provided between the second ratchet and a partial... | 07/11/2006 |
| 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 from a crane or other overhead support, whereby the vertical support... | 06/20/2006 |
| 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 the housing, a pair of flywheels rotatably attached to a pair of suppo... | 06/13/2006 |
| 7052022 | Chuck for pneumatic hammer A chuck for a pneumatic hammer including an insert and a pin engaged with the insert and one or more other components of the chuck, such as, for example, the nosepiece. The pin is configured to prevent or otherwise limit rotation of the insert relative to the one or... | 05/30/2006 |
| 7048074 | Control system for a percussion drive The invention relates to a control system for a percussion drive of an earth drilling unit having a housing, a drilling tool, a pulling or thrusting drive, a percussion piston, a pressure chamber belonging to the percussion piston and a pressure medium feed, which c... | 05/23/2006 |
| 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 striking position is closed by a covering (25) t... | 05/09/2006 |
| 7036608 | Apparatus for producing self-exciting hammer action, and rotary power tool incorporating such apparatus An apparatus for providing percussion action in a rotary power tool having a rotary output shaft, the apparatus comprising at least one moveable mass adapted to have a component of movement parallel to the axis of the rotary output shaft to cause impacts to be appli... | 05/02/2006 |
| 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 rotary member made from a plastic material and a sliding segment fixed... | 03/21/2006 |
| 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 comprises a tool support member (11); a hammer member ( | 01/17/2006 |
| 6971567 | Electronic control of a cordless fastening tool A fastening tool that drives a fastener into a work-piece. The tool includes a motor that is connected to a transmission. The transmission includes a flywheel. The tool also includes a driver mechanism that is adapted to drive the fastener into the work-piece. The f... | 12/06/2005 |
| 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 stroke, against the force developed by heavy-duty elastic ... | 11/22/2005 |
| 6959478 | Shockproof spindle A shockproof spindle includes a spindle inserted into an elastomer having a compressible structure, and a sleeve having a hollow cylinder, sequentially. The sleeve caps the elastomer while the elastomer is pressed on the top of the base fixed at the bottom end the s... | 11/01/2005 |
| 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 opening (14). It is proposed that the idle op... | 10/18/2005 |
| 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 and is communicated to an air guide hole of the motor. A plug is form... | 09/13/2005 |
| 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 portions for holding an outer periphery of the cylinder by at least two ... | 09/06/2005 |
| 6932166 | Pneumatic tool A pneumatic tool (20) for impacting a workpiece (22) is provided. The tool (20) comprises a casing (42) defining a chamber (48). A piston (54) is slidable within the chamber (48) along an operational axis (A). An exha... | 08/23/2005 |
| 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 on/off collar. The adjusting collar rotates but cannot move axially rela... | 07/05/2005 |
| 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 |
| 6758116 | 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 on/off collar. The adjusting collar rotates but cannot move axially rela... | 07/06/2004 |
| 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 a member into which a screw is driven. Guide pin portions ... | 01/06/2004 |
