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 |
| 7210590 | Transportation cart primarily for use in an animal barn A transportation cart primarily for transporting deceased animals through the alleyways of a barn has a swivelling mast and boom mounted on the front section of a frame driven by powered wheels with a slide panel attached to the mast below the boom over which the ob... | 05/01/2007 |
| 7021427 | Lifting apparatus and method A method for intelligent control includes an exchange of historical parameters of events for operating a system and operating a hoist where an electric motor, preferably a DC-motor, is used for lifting and lowering a lifting belt. It can take place at different spee... | 04/04/2006 |
| 6974044 | System and device for controlling a load lifting device The invention relates to a system for controlling a load lifting device (1) with a controllable drive (2) and a lifting element (5) which is linked with the drive (2) and which is—at least in a non-operational position due to the gravit... | 12/13/2005 |
| 6942196 | Electrical automobile car jack In general, an electrically operated car jack is described. A typical embodiment includes a base frame or housing that is adapted to be placed on the ground underneath the automobile to be lifted. The housing includes motors connected to drive arms connected to a lo... | 09/13/2005 |
| 6371247 | Lift assembly A lift assembly includes first and second elevator structures, each including a first scissors section, a second scissors section pivotally connected to the first scissors section and supporting a lift shaft which extends between the first and second stru... | 04/16/2002 |
| 6017018 | Lift-a-top plus An apparatus used to lift and lower an object, such as a canopy covering placed on a truck's opened bed. A T-shaped load engaging platform member has a vertically adjustable sleeve mounted on the platform's vertical member whose position on the member can... | 01/25/2000 |
| 4971511 | Vehicle lifting device A system for lifting and tilting a vehicle sideways is disclosed. The system includes a hoist having a base shaft, a lifting shaft pivotedly mounted at its end to the base shaft, and a mast shaft which is likewise pivotedly mounted at its end to the base ... | 11/20/1990 |
| 4750604 | Mechanical handling apparatus Mechanical handling apparatus includes a surface and a driving mechanism for moving a load over the surface which comprises a substantially vertically reciprocable platform device for actuating the load, and a lever device including at least two oppositel... | 06/14/1988 |
| 4534544 | Lift A lift consists of a platform that the article to be lifted rests on and a scissors jack that is attached to the bottom of the platform and that can be spread up out of an extended position with rollers. One pair of the parallel scissoring legs of the jac... | 08/13/1985 |
| 4022428 | Lift device A lift device having a vertical column securable on a support surface. A support frame is movably secured along at least a portion of the column. A driveable drum is secured in an upper part of the column and a drive assembly, including a drive motor, is ... | 05/10/1977 |
| 4015820 | Work lifting and supporting device A device is disclosed and claimed herein for lifting and supporting large items requiring repair, assembly, installation, disassembly or the like. A bumper of an automobile, a door of an automobile, an automobile body panel or the like are exemplary of wo... | 04/05/1977 |
| 3993286 | Low profile air jack A low profile air jack for lifting vehicles is described, in which the force exerted by a horizontally disposed air cylinder and piston assembly on the lever arm of a lifting member pivoted to the jack frame causes the lifting member to rotate, so that it... | 11/23/1976 |
| 3938234 | Pipe joining method An apparatus for joining the free end of a first pipe to a coupling collar secured to the end of a second pipe includes a longitudinally extending member adapted to engage the coupling collar while supported by the second pipe, and a flexibly extending me... | 02/17/1976 |
| 3931957 | Lifting apparatus Lifting apparatus for mounting on a support structure comprising first and second elongated guide assemblies each having an anchor end pivotally anchorable to said support structure for vertical pivotal movement and a movable end disposed to extend outwar... | 01/13/1976 |
