Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7441993 | Making connections to pipes under pressure Methods and apparatus for making connections to pipes and pressure vessels while they are under pressure employs a first drive mechanism for delivering a cutting tool to the pipe or vessel wall and a second separate drive mechanism for powering the movement of the c... | 10/28/2008 |
| 7226252 | Hand-held drill leverage unit A hand held drill leverage unit for supporting, positioning, and leveraging a drill. The leverage unit has a main lever arm pivotally supported by a fulcrum unit. A drill end of the lever arm supports the drill, while an opposing, longer, handle end of the lever all... | 06/05/2007 |
| 7028380 | Rivet removal tool and method A device and method of removing a rivet which has been installed on a work piece. The method includes clamping a hand held device having springs onto the work piece, engaging a drill with a drill bit of the hand held device, the springs applying a pre-load force to ... | 04/18/2006 |
| 6516842 | Hollow chisel mortiser with a rotor for adjusting a working angle of the mortiser A hollow chisel mortiser with a rotor for adjusting a working angle of the mortiser includes a base having a recess defined in a rear end of the base. The rotor rotatably abuts and is selectively secured on the rear end of the base. The rotor includes a p... | 02/11/2003 |
| 5961258 | Apparatus for clamping and boring workpieces In order to facilitate and reduce the time necessary for clamping together and boring a hole through at least two workpieces that are to be joined together, for example by rivets or bolts, a portable clamping and boring apparatus carries out all necessary... | 10/05/1999 |
| 5902077 | Variable speed universal drilling tapping and reaming machine One of two arms is mounted adjacent one end thereof for rotation and axial adjustment on a cylindrical column which projects vertically upwardly from a generally flat, rigid base. The second arm is rotatably connected adjacent one end to the opposite end ... | 05/11/1999 |
| 5713702 | Adaptors for a drill stand An adaptor mounting a drill stand on an I-beam comprises a base plate which is clamped to a flange of the beam by clamping arrangements. A table of the drill stand is then bolted to cross-members slidably mounted on the base plate. In another arrangement,... | 02/03/1998 |
| 5409328 | Drilling machine for railroad rail A drilling machine for a railroad rail, in which the railroad rail is clamped crosswise with respect to a main body case by a catch frame and a clamp arm, includes a cutter advanced perpendicularly with respect to the middle part of the rail by turning th... | 04/25/1995 |
| 5038818 | Insertion assembly for a pipe completion plug A method for cutting an opening in the side of a pipe carrying gas under pressure, providing a bypass through the cut, and terminating the bypass when the pipe has been repaired, and apparatus for performing steps of the method. A branching saddle is bond... | 08/13/1991 |
| 4936720 | Compact device for cutting holes in pipe A device for cutting holes in pipe includes a base configured for attachment normal to a section of pipe and having a track extending the length of the base, a travel plate slidably engaged in the track and configured for the accommodation of a power dril... | 06/26/1990 |
| 4810137 | Double-use electrical drill A double-use electric drill including a frame and an electric hand drill that is secured thereto in either a first or a second orientation. In the first orientation, the frame is utilized as a hip or shoulder stock assembly when the drill is being used as... | 03/07/1989 |
| 4729698 | Multi-purpose and versatile portable power tool A portable electric power tool constituted by two cooperating main components, namely, a power head of predetermined exterior cross-sectional shape and a sleeve with interior surfaces mating to the power head to afford relative sliding movement, but not r... | 03/08/1988 |
| 4669929 | Joist drill A drilling apparatus especially useful in drilling holes in wooden joists and studs, through which plumbing and electrical cables are to be routed, includes a bracket for engaging a joist or stud and a movable carriage supporting an electric motor and dri... | 06/02/1987 |
| 4667553 | Notching tool with presser foot A compact notching device comprises a single piston and cylinder assembly including a piston rod, a shaft axially and rotatably mounted within the piston rod, and means for longitudinally coupling the shaft to the piston rod such that when the piston rod ... | 05/26/1987 |
| 4648422 | Apparatus for drilling into a pipe under pressure An apparatus for drilling into a pipe under pressure to form a branch has a casing which can be connected to an isolating valve of a tee-fitting and through which a drill bit passes within the tee-fitting and the valve. The drill bit is surrounded by a ba... | 03/10/1987 |
| 4565470 | Apparatus for hand drilling Method and apparatus for hand drilling wherein the reaction torque generated in the hand drill from the workpiece is transferred to a support for the drill and then back into the workpiece to not only divert stress from the operator's body but also to hol... | 01/21/1986 |
| 4540319 | Drilling device for removing a spot-welded portion A drilling device for removing a spot-welded portion includes a main body casing having a chuck receiving holder, a U-shaped arm one an end of which is connected to a side portion of the chuck receiving holder, a grip handle pivotally connected to a base ... | 09/10/1985 |
| 4516598 | Well safety valve A safety valve adapted to be mounted on a submerged section of oil well pipe for sealing the pipe if an oil leak occurs in the pipe above the valve location. The valve includes a collar rotatably mounted on the pipe and is located between a pair of positi... | 05/14/1985 |
| 4484844 | Horizontal drill press A portable horizontal drill press for drilling holes in the surfaces of highway vehicles and construction type equipment including a T-shaped base support beam which is mounted on swivel type wheels with low clearance provided to minimize tipping. A drill... | 11/27/1984 |
| 4431017 | Pipe tapping method and apparatus To tap a main pipe for connection of a branch pipe thereto, a tubular enclosure is applied to the main so that one end of the enclosure is formed by the main pipe side-wall to be holed. A drill is penetrated through the main pipe side-wall from the interi... | 02/14/1984 |
| 4332272 | Hot tap apparatus and method A thermowell or the like is installed in a pipe or similar member without taking the member out of service by first welding an adapter to the surface of the member at the point where the thermowell is to be installed, connecting a gate valve and hot tappi... | 06/01/1982 |
| 4331170 | Hot tap apparatus and method A thermowell or the like is installed in a pipe or similar member without taking the member out of service by first welding an adapter to the surface of the member at the point where the thermowell is to be installed, connecting a gate valve and hot tappi... | 05/25/1982 |
| 4231690 | Tube lock drill tool A tube lock drill for remotely performing operations on equipment including a positioning mechanism disposed in the equipment for selectively positioning the tool with respect to the equipment with the tool comprising a locking mechanism associated with t... | 11/04/1980 |
| 4165948 | Drilling and boring machine The invention relates to a machine for drilling and boring tubular plates, the workpiece-carrying elevator being embedded, weight compensation being provided by appropriate means, the machining units moving substantially at ground level opposite thrust tu... | 08/28/1979 |
| 4030853 | Drill apparatus A drill apparatus including a stationary support frame, a drill carriage mounted on the stationary support frame for movement relative thereto along a generally horizontal path, a drill head mounted on the carriage and having a drill rotatable about an ax... | 06/21/1977 |
