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 |
| 7188509 | Tool and method for adjusting a door hinge A tool for aligning a door hinge with the edge of the door to which it is mounted comprising a bar having a wrench on each end of the bar. The faces of each jaw of the respective wench are contoured to fit around a single knuckle of the hinge. The bar has a slit arr... | 03/13/2007 |
| 6973724 | Method for making a tubular element and resulting tubular element A method for making a tubular element, in particular a motor vehicle front cross member (1), for forming at least an air conduit (2,3,4) including at least two half-shells (5,6) assembled on two outer longitudinal edges (5a, 6 | 12/13/2005 |
| 6964185 | Apparatus for bending and transporting an aluminum sheet A bending apparatus for bending and transporting an aluminum metal sheet. The bending apparatus includes a central retaining portion that has gripping elements mounted on the central retaining portion for retaining an aluminum metal sheet. There is also included a b... | 11/15/2005 |
| 6223574 | Thin-walled ring-shaped member and method of manufacturing same A sheet of strip material of metal is coiled into a ring-like member, with a broader surface thereof being oriented in a radial direction. Opposite ends of the sheet of strip material are connected together by a joint. The joint includes a concave portion... | 05/01/2001 |
| 5593708 | Apparatus for bending plastic pipe A bending process including both preliminary and following steps takes place in one apparatus. A plastic pipe (6) is heated to a temperature in which it can be plastically deformed. The heated pipe is thereafter shoved into a pipe-shaped bending channel (... | 01/14/1997 |
| 4692980 | Method and apparatus for forming an arcuate sheet metal seam A method and apparatus are disclosed for fabricating an arcuate seam between two pieces of sheet metal. The method involves a three-step process in which an arcuate standing seam is formed on a first piece of sheet metal, the marginal edge of a second pie... | 09/15/1987 |
| 4580715 | Method and apparatus for making a water-tight radiator element The open ends of a flat tube are closed by rolling together the edge portions of the wide, opposing sidewalls of the tube by means of two flanging rolls successively guided over these edge portions in opposite directions. One of the flanging rolls makes a... | 04/08/1986 |
| 4165627 | Method and apparatus for closing the end of an extruded tube submerged in water In the direct extrusion of tubing wherein the extruded tube or tubing is immediately submerged into water after extrusion and having a closed leading end, the trailing end thereof in the extrusion press is sealed off from the entrance of water by a crimpi... | 08/28/1979 |
| 4072118 | Seam crimping apparatus A seam crimping apparatus for crimping standing seams of building panels.... | 02/07/1978 |
| 3953993 | Multiple size culvert pipe rolling machine A plant for the manufacture of pipes of different diameters and lengths in which the pipe is manufactured to order and then shipped to a customer. The plant comprises a pipe-forming machine for each desired pipe diameter which forms pipe from elongate str... | 05/04/1976 |
