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| Number | Title | Issue Date |
| 7134459 | Methods and apparatus for mixing powdered samples Method for preparing a mixed powder sample by mixing two or more different powders comprising transferring a quantity of a first powder to a mixing vessel and transferring a quantity of a second powder to the mixing vessel to form a powder bed in the mixing vessel c... | 11/14/2006 |
| 6805175 | Powder transfer method and apparatus Apparatus for aspirating and dispensing powder, comprising a hopper having a powder transfer port and a suction port for connection to a source of suction to establish an upward flow of air (or other gas) through the transfer port.... | 10/19/2004 |
| 6467497 | Buffer box for use in a vacuum drainage system A buffer box for use in a vacuum drainage system. The buffer box defines a reservoir of known effective size which provides substantially consistently sized slugs of liquid which may be efficiently pulled up a vertical lift. The buffer box includes an out... | 10/22/2002 |
| 6447215 | Method and plant for pneumatic transport of solid particles The present invention provides a method and plant for the pneumatic transportation of solid particles in the form of a diluted phase through a conduit (1), with which the transport air in said conduit is given a velocity which is at most equal to the air ... | 09/10/2002 |
| 5562367 | Pressure responsive bi-directional pneumatic conveyance system with a single pneumatic source, and pressure generator elements therefor A bi-directional pneumatic conveyance system which relies upon a single pumping element, and which bi-directionally conveys an item therethrough based upon the position of the item is disclosed. Such a system has plural stations, sensors for sensing press... | 10/08/1996 |
| 4813818 | Apparatus and method for feeding powdered materials A vacuum assisted feeding apparatus for delivering finely pulverized particulate materials, such as powdered metal, is disclosed in which a material holding hopper has a feeder tube extending into a lower disposed filling chamber subject to sub-atmospheri... | 03/21/1989 |
