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...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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Class 223/20 - Pouncing and polishing


Subclass of Class 223 - Apparel apparatus
Definition: Devices and methods for smoothing or polishing the nap of
No. of patents: 2
Last issue date: 05/13/2008


NumberTitleIssue Date
7371322Filtration system and dynamic fluid separation method
A filtration system is provided with filter media operable to remove solids, particulate and colloidal matter from a process fluid. The filtration system may include one or more porous membranes which are anchored or secured on their periphery with a large open work...
05/13/2008
7282147Cleaning hollow core membrane fibers using vibration
A filtration system is provided with hollow membrane filter elements operable to remove solids, particulate and colloidal matter from a process fluid. Acoustic, vibration and ultrasonic energy may be used to clean exterior portions of the hollow membrane filter elem...
10/16/2007
 
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