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 |
| 5212957 | Refgrigerator/water purifier A refrigeration system provides a supply of purified ice pieces by freezing flowing water on an icemaking plate and melting some of the ice pieces to provide a supply of purified water. The system is combined with a household refrigerator to utilize a com... | 05/25/1993 |
| 5207761 | Refrigerator/water purifier with common evaporator A refrigeration system provides a supply of purified ice pieces by freezing flowing water on an icemaking plate and melting some of the ice pieces to provide a supply of purified water. The system is combined with a household refrigerator to utilize a com... | 05/04/1993 |
| 5123948 | Icemaker/water purifier with by-pass condenser A refrigeration system is employed alternatively as an automatic ice-maker, and a device to automatically produce a supply of purified water by melting a portion of the ice produced in the ice-making operation. Separate sections of the condenser of the re... | 06/23/1992 |
| 5103653 | Icemaker/water purifier with convective melting A refrigeration system employed as an icemaker, in which part of the ice so produced is stored in a bin, and in which, part of the ice is then melted to provide a supply of purified water in a container. In one embodiment convection flow of air conveys he... | 04/14/1992 |
| 5032157 | Icemaker system with wide range condensing temperatures A refrigeration system having two alternatively actuable condensers operating at different condensing temperatures and pressures includes a compensatory metering arrangement for preventing significant changes of refrigerant fluid flow rate to the system e... | 07/16/1991 |
| 5013344 | Icemaker and water purifier with controlled condensing temperature The system disclosed in my U.S. Pat. No. 4,897,099 for deriving purified ice pieces and purified water from tap water is modified by providing a metal or thermally conductive heat flow path from an alternative refrigerant condenser to the ice collection b... | 05/07/1991 |
| 5011524 | Ice maker and water purifier employing pre-cooled make-up water The efficiency of the system disclosed in my U.S. Pat. No. 4,897,099, wherein purified ice pieces and purified liquid water are derived from tap water, is improved by transferring heat from the tap water to the collected ice pieces. The transferred heat w... | 04/30/1991 |
| 4998417 | Icemaker system with wide range condensing temperatures A refrigeration system having two alternatively actuable condensers operating at different condensing temperatures and pressures includes a compensatory metering arrangement for preventing significant changes of refrigerant fluid flow rate to the system e... | 03/12/1991 |
| 4941902 | Ice maker and water purifier Purified ice pieces of a size suitable for use in drinks, and purified liquid water, are derived from unpurified liquid water by directing a stream of the unpurified water over areas of at least one freezing surface. As ice forms at the freezing surface, ... | 07/17/1990 |
