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 |
| 7128344 | Dolly for portable air compressor A dolly and compressor assembly for transporting compressors has a frame with a handle structure and a support portion. At least one wheel and a platform are attached to and supported by the support portion. To accommodate a compressor, a retention formation is disp... | 10/31/2006 |
| 6431839 | Air compressor assembly with shroud An apparatus comprises a tank, an air compressor, and a motor with an output shaft. A fan is mounted on the output shaft. A drive assembly interconnects the motor operatively with the compressor. The apparatus further includes a base structure and a shrou... | 08/13/2002 |
| 4305389 | Rack for a foot-operated anesthetic gas bag A low non-skidding rack holds a breathing bag against the operating room floor in position to be conveniently squeezed rhythmically by the anesthetist using the ball of his foot, thus reinforcing or even taking over the depressed respiration of his patien... | 12/15/1981 |
| 4224882 | Apparatus for sowing seeds in suspension The invention provides an apparatus for sowing seeds in a liquid suspension in which a peristaltic pump supplies the suspension to the ground at a position behind and above the lower part of a drill coulter.... | 09/30/1980 |
| 4177937 | Constant pressure spraying apparatus Disclosed is a constant pressure spraying apparatus in which the motor driven pump piston moves within a pump housing and valve assembly which are carried by a cap or closure for the fluid tank forming the reservoir of fluid to be pumped and sprayed. The ... | 12/11/1979 |
