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Dengfeng
Dengfeng Xu, Beijing CN
| Patent application number | Description | Published |
|---|---|---|
| 20100187917 | MICRO STAGE WITH 6 DEGREES OF FREEDOM - A micro stage with 6 degrees of freedom used in super-precise processing and sensing equipment filed is disclosed. The micro stage has three sets of electromagnetic driving units arranged in a horizontal plane for driving the micro stage to obtain movements within the horizontal plane with 3 degrees of freedom in X, Y and θ | 07-29-2010 |
| 20100208227 | DUAL-STAGE SWITCHING SYSTEM FOR LITHOGRAPHIC MACHINE - A dual-stage switching system for lithographic machine includes a wafer stage to be operated in an exposure station and another wafer stage to be operated in a pre-processing station. The two wafer stages are provided on a base, with four 2-DOF driving units capable of moving along X direction and Y direction being provided along the edge of the base, and the wafer stages being disposed in a space surrounded by the four 2-DOF driving units and suspended on an upper surface of the base by air bearings. Each of the 2-DOF driving units includes upper and lower linear guides and a guiding sleeve, with the upper and lower linear guides being installed vertical to each other in their corresponding guiding sleeve. Two adjacent 2-DOF driving units cooperatively drive the wafer stage) to move in the X direction and Y direction. | 08-19-2010 |
Dengfeng Xu, Irvine, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20080223786 | Methods and devices using a shrinkable support for porous monolithic materials - Articles of manufacture and devices and methods of forming and using the same are provided, wherein the article comprises a porous inorganic substrate contained in or bounded by a support made from an inorganic material are provided, wherein said porous substrate and support are heated to a temperature effective to shrink the support onto the porous substrate such that liquid tight contact is formed between the porous substrate and the support. In a preferred aspect, the porous inorganic substrate has a porosity of at least 5%, and is a porous monolith formed using a sol-gel method. The articles thus formed provide a confined fluid flow through the porous substrate, providing superior performance in separations, catalysis, filtration, and the like. | 09-18-2008 |
| 20090008327 | ULTRAPOROUS SOL GEL MONOLITHS - Ultraporous sol gel monoliths and methods for preparing the same are provided, having superior flow characteristics for chromatography and analytical chemistry applications. The methods for forming an ultra porous sol-gel monolith include (a) forming a solution comprising a porogen, a matrix dissolving catalyst and a sol gel precursor; (b) allowing the solution to form a gel; and (c) drying the gel at an elevated temperature. The ultraporous sol gel monoliths are characterized by a porosity of up to about 97%, a BET surface area of at least about 50 m | 01-08-2009 |
Dengfeng Zhang, Shanghai CN
| Patent application number | Description | Published |
|---|---|---|
| 20100196640 | HIGH PRESSURE TUBE FOR HYDRAULIC TRANSMISSION - This invention relates a high pressure tube for hydraulic transmission consisting of the silicon rubber tube, the knitted fiber layer and the protective layer, the knitted fiber layer is fixed between the silicon rubber tube and the protective layer, which is characterized in that the material of the said silicon rubber tube is silicon rubber material KE581U; the said knitted layer is made by the knitting of terylene wire; the material of the said protective layer is silicon resin KR-166. The advantages summed up for this invention are in features of anti-ageing, anti-corrosion, withstanding high temperature, pliability, low shrinking ratio and environmental friendly, the said tube can be used for hydraulic transmission system in cases of very high pressure, the minimum explosive pressure reaches 15.5 MPa and the pressure under normal operation is 10 MPa at temperature of 20° C., | 08-05-2010 |