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 |
| 7367409 | Latch mechanism for pivoting handle assembly of a power tool A latch mechanism for a power tool is disclosed, in which the power tool has a housing (3), a motor provided in the housing, an output shaft adapted to be caused by said motor to actuate a working member, and a handle assembly (2) adapted to pivot rela... | 05/06/2008 |
| 6141876 | Soil pipe cutter A soil pipe cutting device comprising a pair of pivotally interconnected arm members having jaw ends and actuator ends and a flexible, non-extendable cutter chain adjustably mounted between the jaw ends to circumscribe a pipe to be cut is provided with a ... | 11/07/2000 |
| 6122827 | Hydraulic pipe cutter A chain pipe cutter has a pair of pivotal handles that carry a non-extendable cutter chain. A first handle has a contact member secured to a lower part of the first handle in a pivotal relationship so as to adapt the contact member to an angle most suitab... | 09/26/2000 |
| 5621973 | Lockable folding knife with rollover blade selection A folding knife has a knife body and at least two blades pivotably mounted to the knife body. The blades are independently movable between a closed position within the knife body and an open position extended from the knife body. The blades are locked in ... | 04/22/1997 |
| 5461955 | Device for cutting pipe A device for cutting pipe comprising two sleeves, which sleeves are securely tensionable about a pipe and adjacent to each other. An axial cleft remains exposed between the two sleeves, in which lies the cutting line. A chain type pipe cutter runs upon th... | 10/31/1995 |
| 5146469 | Method and means for continuous production of carbon bodies The present invention relates to a method and a means for continuous production of elongated carbon bodies having a constant or substantially constant cross-section where a casing filled with unbaked paste consisting of carbon and a carbon containing bind... | 09/08/1992 |
| 5086961 | Pipe severing method and apparatus A pipe severing device (1) and method utilizing a chain (13) having stress inducing wheels (19) efficiently and safely severs brittle materials including cast iron, vitreous clay, cement and asbestos pipe. The device includes an actuating handle (6) which... | 02/11/1992 |
| 4763413 | Chain tube cutter A chain tube cutter has two plier-like levers with hand grips on one side of a pivot pin which projects from one lever through a slot in the other and chain-engaging arms on the other side of the pivot pin. A link cutting chain is secured to one arm. The ... | 08/16/1988 |
| 4663844 | Device for cutting an electrode casing The present invention relates to a device for cutting the casing on baked carbon electrodes. The device comprises a ring (1) which is freely suspended about the electrode. At least two clamping shoes (7) having vertical extending cutting edges (17) are pi... | 05/12/1987 |
| 4535924 | Apparatus for supporting a pipe and pipe snapping tool An apparatus for supporting a pipe and pipe snapping tool having the advantages of ease of assembly and disassembly and portability. The apparatus includes a main support and pair of upwardly opening pipe trays fixedly attached to the main support and ali... | 08/20/1985 |
| 4370995 | Method and apparatus for prenotching a pipeline The wall of a pipe is prepared for a subsequent cutting operation by a double-edged shear plate, by cutting axially spaced circumferential notches in such wall with a flexible strand cutter capable of operating in the limited confines of a housing designe... | 02/01/1983 |
| 4271591 | Pipe-cutter with interchangeable chains The present patent relates to chain pipe-cutters equipped to cut all kind of material. The chain pipe-cutters include: a tensioner which is a deformable system formed by a cylindrical rod fast with a support, a slider slidably mounted on said rod, said su... | 06/09/1981 |
| 3943626 | Pipe cutter A U-shaped body member has key slots adjacent opposite ends thereof arranged to have removable connection at spaced points in a chain of a chain pipe wrench. A cutter bit projects adjustably beyond the bottom portion of the body member for cutting a pipe ... | 03/16/1976 |
