Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7293361 | Hand tool for chopping ice An ice chopper having a blade for initially engaging ice with a small force followed by an impact of a larger force to break up the ice. The ice chopper has a tube for a handle having a second tube inside with a compression spring. The second tube has a blade attach... | 11/13/2007 |
| 7222561 | Pyromechanical cutting element A pyromechanical cutting element has a housing (2) in which an electrical conductor (3) is arranged, a cutting plunger (5) with a cutting tool (8) to cut through the electrical conductor (3), and pyrotechnic charge (13) to d... | 05/29/2007 |
| 7121007 | Cutting assembly for removing a windshield and method relating to same The cutting assembly functions to sever the urethane bed bonding a windshield to a vehicle. The assembly comprises a reciprocating air gun connected with a cutting blade by a shaft. The blade has a straight front cutting edge about 4 inches in width. The blade is re... | 10/17/2006 |
| 7117954 | Weed puller A weed puller that comprises a plurality of prongs positioned about an axis, an anvil plate, and a moveable mass adapted to be driven into the anvil plate so as to transmit a force through the anvil plate to the prongs where the force has a substantial component in ... | 10/10/2006 |
| 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 mode. A manually operable selector lever enables the hammer drill to be s... | 08/29/2006 |
| 6769182 | Chisel device A chisel device for providing a chisel and slide hammer combination. The chisel device includes an elongated body having a first end and a second end, An annular flange is integrally coupled to and extends around the elongated body. The flange is positioned generall... | 08/03/2004 |
| 6367854 | Handle device of an impact hand tool A handle device of an impact hand tool is proposed. The handle device is designed for an axial force to be applied thereto. An impact force can be used to assist the hand tool. The handle device includes a handle and an impact device. The front end of the... | 04/09/2002 |
| 6324765 | Weed trimmer guard A guard for a weed trimmer includes an elongated telescoping arm attachable to a trimmer shaft. The arm is biased in an extended position. Pivotally attached to a distal end of the arm is a protector plate for providing a protective barrier between a trim... | 12/04/2001 |
| 6138769 | Root cutting tool A tool for inserting beneath a plant to sever roots, such as tap roots, that are located beneath a tree or shrub at a location relatively far from the circumference of a root ball, the tool comprising a cutting blade of generally triangular shape having a... | 10/31/2000 |
| 5848470 | Impact actuated bakery grid device An impact actuated bakery grid device 10 for producing uniform portions of baked goods wherein the grid device 10 includes a force generating unit 13 operatively associated with a handle member 30 which is connected at widely spaced locations on a grid me... | 12/15/1998 |
| 5497555 | Electromagnetic percussion device An electromagnetic percussion device, which includes a housing and an instrument which is connected to, and which extends beyond, the housing. The device further includes a piston body reciprocatable within the housing and adapted to impact the instrument... | 03/12/1996 |
| 5480507 | Reciprocating cutting tool and method A reciprocating cutting tool includes a shank for mounting in a pneumatic hammer, a blade holder assembly connected to the shank and a blade clamped in the blade holder assembly. The blade holder assembly includes a base member and a retainer member which... | 01/02/1996 |
| 5453043 | Pelvic splitter device and method of use thereof This invention relates to a pelvic splitter device and method of use thereof used primarily by hunters to split the pelvis of a large game animal during the gutting and cleaning of the animal. The pelvic splitter device comprises a shaft having a hook mem... | 09/26/1995 |
| 5361499 | Wall paper trimmer A "trim-easy" wall paper trimmer (10) which is light weight, hand-held and comprising of four rechargeable d.c. battery cells (15) contained in a battery chamber (12) and supplying power to a 4.8 volt electric motor (24) which drives a reciprocating actio... | 11/08/1994 |
| 5344506 | Shape memory metal actuator and cable cutter A shape memory alloy (SMA) actuator predeformed in compression actuates a cable cutter mechanism. A cable or other item to be cut is placed between an anvil and a movable blade affixed to the SMA element. The SMA element is heated by an electrical resista... | 09/06/1994 |
| 5301429 | Tool for removing moldings and the like A powered tool removes moldings or other mounted item without imparting damage to the surface being worked upon. The tool has a blade affixed to a handle. The handle and blade are interdigitated so as to form a flat surface along the bottom of the tool. T... | 04/12/1994 |
| 5247545 | Control blade servicing assembly An assembly for servicing a cruciform control blade includes a carriage having first and second crossarms each containing a generally U-shaped slot for receiving the top of the control blade. The first crossarm includes a clamping actuator to rigidly clam... | 09/21/1993 |
| 5224231 | Powerbrush attachment A brush attachment for a power tool, such as an electric drill, capable of rotating a suitable shaft including an attachment body containing a longitudinally extending chamber and an elongate shaft rotatably mounted in this body and projecting from a rear... | 07/06/1993 |
| 5159865 | Vibration driven hot knife for separating bonded assemblies A portable hand-cutting tool having a pair of perpendicularly arranged handles which is used for separating the trailing edge of bonded elevator or rudder skin panels following removal from an aircraft for repair. The tool features an electrically heated ... | 11/03/1992 |
| 5040614 | Self-operated edging tool An edging tool includes a sleeve unit in which a weight bar is slidably received and on which a blade is mounted. The weight bar is drawn back to a cocked position by hand, and when released, impacts an impact block mounted on the sleeve unit and which is... | 08/20/1991 |
| 5005286 | Mold extractor A mold extractor and method of manufacture thereof is provided. The extractor or tool is used to remove the annular wall, bottom wall, and lid of a plastic mold container from a concrete test sample taken at a construction site for later testing in a test... | 04/09/1991 |
| 4997434 | Prosthetic ligaments and instruments for use in the surgical replacement of ligaments This invention relates to a new prosthetic ligament and a set of surgical instruments for use in the surgical replacement of a ligament and in particular for inserting a prosthetic ligament into the body. The ligament in accordance with the invention comprises... | 03/05/1991 |
| 4829673 | Precision self-actuated woodworking tool A self-actuated woodworking tool [T] for one-handed reciprocating operation has a chambered haft [1] and a tool shank [4] carried captively axially within the haft in slidable, reciprocal relationship. A shank portion [5] extending forwardly from the haft... | 05/16/1989 |
| 4813134 | Sheet metal punching and cutting tool A compact, easy-to-use sheet metal tool which is capable of receiving hammer blows and having a cutting element capable of penetrating the sheet metal to create a slot and to cut an extended slot in the sheet, the tool is further provided with a flat guid... | 03/21/1989 |
| 4807367 | Can end cutting device A tool for cutting the ends from spent cans of paint, solvents, or coatings so that the can wall can be easily flattened to facilitate disposal. The tool includes a handle having a hand grip on one end and a cutting head on the other end. The cutting head... | 02/28/1989 |
| 4793063 | Punch gun An explosive actuated hand tool for cutting clean holes in sheet material, wherein the explosive force causes a piston to pull a punch toward a die, the material being located between the punch and die. Convenience and safety features include means for ar... | 12/27/1988 |
| 4788027 | Method and means for remote removal of guide balls from nuclear reactor control rods A punch mechanism for remote removal of guide balls from nuclear reactor control rods, includes attachment means for attaching the punch mechanism to means for reversibly lowering the punch mechanism over the top of one of the control rods. The mechanism ... | 11/29/1988 |
| 4633586 | Safety chisel A safety chisel especially adapted to shear bolts having a nut permanently attached thereto, while retaining the sheared bolt and nut assembly within a safety container portion of the chisel.... | 01/06/1987 |
| 4627166 | Washer cutter A device is provided which can be used to remove washers from bolts in an efficient, fast and safe manner. The device is comprised of a removable blade assembly disposed in a handle device. The blade assembly has an opening permitting the insertion of the... | 12/09/1986 |
| 4587733 | Percussion device Percussion device for triggering the primer of a blasting charge of an actuation device. It comprises a striker (4) moveably housed and retained in a support (1), as well as a helical traction spring (7) of which one end (8) is secured to the striker. The... | 05/13/1986 |
| 4572035 | Tool constructions for removing frozen nuts A combined nut cutter and wrench tool including a body having an axis and a base from which a plurality of cutting blades extend with the cutting blades each having a first surface inclined relative to the axis and a second surface extending generally in ... | 02/25/1986 |
| 4548278 | Percussion tool A power operated percussion tool in which a shoulder (28) in the tool housing (10, 17) defines a rear rest position for working implement (12) attached to the tool, and in which an energy absorbing bias unit (23, 31) is arranged to resiliently load the wo... | 10/22/1985 |
| 4543720 | Cutting tool A cutting tool for separating beads of adhesive, with a U-shaped cross-section consisting of two flanks connected by a web. One flank is a sickle-shaped blade and the other is employed to attach the tool to an oscillating driveshaft. The center of curvatu... | 10/01/1985 |
| 4467539 | Resonance aided front end loader A front end loader has a loading bucket secured to a tractor and a transversely elongate cutter blade closely spaced forward of a lower front edge of the bucket. Improved apparatus for reciprocating the blade in forward and aft directions relative to the ... | 08/28/1984 |
| 4466851 | Method and apparatus for scraping adherent material from a smooth work surface A pneumatic impact tool has a tubular housing with an impact head secured in and extending outwardly from one end of the housing and a valve secured within the housing but spaced from the impact head so that a piston chamber is formed within the housing. ... | 08/21/1984 |
| 4466188 | Roofing remover A wedge head is provided having upper and lower surfaces and front and rear ends. The upper and lower surfaces are forwardly convergent toward a forward transverse apex edge of the head and an elongated handle is provided including base and free end porti... | 08/21/1984 |
| 4464963 | Impact-type wire rope cutter with fragment guard An impact-type wire rope cutter is disclosed in which a slotted fragment guard is movably mounted to the body of the wire rope cutter. The slotted fragment guard slidably receives the cutting chisel therethrough, and it is formed so that it can be moved b... | 08/14/1984 |
| 4458415 | Hammer driven chopper A chopping hand tool, including a slidable hammer along a handle of the tool for striking against a hammer stop mounted on the handle, so to transmit the hammer striking force to a toothed edge of a blade affixed to one end of the handle, so that the toot... | 07/10/1984 |
| 4458416 | Vibration damped portable impact tool A vibration damped portable impact tool comprising a pneumatically powered reciprocating mechanism to which a chisel is connected. In the disclosed tool the chisel is rigidly connected to the piston of the reciprocating mechanism so as to move conjointly ... | 07/10/1984 |
| 4452316 | Power hoe with reciprocating blades in sliding engagement with each other A power hoe includes a power source, two substantially planar hoe blades positioned in apposition to one another and power connecting structure to synchronizingly reciprocate the blades in sliding engagement relative to each other. The sliding engagement ... | 06/05/1984 |
