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 |
| 7186430 | UHT pasteurizer with regeneration A pasteurization arrangement employs regeneration to bring raw milk or other liquid food product up to a few degrees below a UHT pasteurizing temperature. The product is first heated up by regeneration to about 175° F., and held at this temperature for about sixty ... | 03/06/2007 |
| 6981383 | Zone damper fault detection in an HVAC system A zoned HVAC system is provided with a series of dampers. A control for the dampers causes the dampers to each move between open and closed positions while monitoring a system condition. The system condition is selected to be one that should change as the damper mov... | 01/03/2006 |
| 5881681 | Water heating system A water heating device comprising (a) combustion means for igniting a combustible mixture of air and gas for heating water; (b) heat exchanger means for providing heat transfer between the hot gases and the water, the exchanger means including a combustio... | 03/16/1999 |
| 4852524 | Gas fired water heater A novel semi-instantaneous, modulating and condensing gas fired water heating system having a very high dynamic response for supplying potable water on demand at a substantially constant, controlled temperature having a maximum output of approximately 1,0... | 08/01/1989 |
| 4385723 | Connection assembly A connection assembly for connecting an external heating unit to a heater water tank comprising a mounting assembly connected to a tank opening with a passage opening interiorly of the water tank and connected to the heating unit exteriorly of the water t... | 05/31/1983 |
| 4347972 | Apparatus for production of hot water An apparatus for producing hot water. A heat exchanger has a primary circuit which receives water from a hot water source and delivers the spent water back to the source. A secondary circuit through the heat exchanger receives unheated water and delivers ... | 09/07/1982 |
| 4305547 | Water heater temperature control system A water heater supplies hot water at a variable flow rate, depending on demand, and at a substantially constant, controlled temperature. It comprises a heat exchanger formed with an inlet and an outlet whereby water can be supplied to and withdrawn from t... | 12/15/1981 |
| 4278069 | Water heater A water heater comprises an elongated vessel having a heat exchanger that occupies a substantial portion at one end and leaves a minimum volume storage and blending zone at the other end of the vessel. Water is recirculated through the heat exchanger, pre... | 07/14/1981 |
| 4098592 | Temperature control system for chromatographic apparatus A process chromatograph including a column for separating fluid samples into their individual components, and a density-responsive detector connected to the column output to produce a pressure signal representing the concentration of the separated compone... | 07/04/1978 |
