Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 6397419 | System and method for sleep surface adjustment A system for sleep surface adjustment is described. The sleep surface is provided by a sleep support system that is configured for at least two users. The sleep surface of the sleep support system is supported by at least two fluid chambers whose pressure... | 06/04/2002 |
| 6037723 | Air control system for an air bed An automatic control system for controlling the firmness of a fluid supported mattress of a bed assembly. The control system includes a motorized fluid pump, a control unit for operating the pump to adjust the firmness of the air mattress, a hand held rem... | 03/14/2000 |
| 5564140 | Frame assembly for supporting a mattress A bed foundation for supporting a mattress in a raised position relative to a floor that includes a frame assembly, mattress support panels, and retaining elements shiftably carried by the frame assembly for securing the mattress support panel against mov... | 10/15/1996 |
