Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7343827 | System and process for break detection in porous elements for screening or filtering A method of detecting breaks in a porous element in a material separator is disclosed. A shielding is created in the material separator to form a barrier to RF energy. The shielding is formed with a path through the barrier capable of allowing RF energy and material... | 03/18/2008 |
| 6953121 | Vibrating screen A vibrating screen assembly supported by springs is provided which is used to size separate rock and other material. The present invention includes increasing the natural frequency of the screen assembly by stiffening the individual screen decks of the screen assemb... | 10/11/2005 |
| 6536601 | Sludge silo The invention relates to a silo for sludge, especially sewage sludge, comprising a sludge-receiving part (12), a feeding part (16), said feeding part being located above the sludge-receiving part (12) and communicating with said sludge-receiving part (12)... | 03/25/2003 |
| 6079569 | Efficiency ultrasonic sieving apparatus An ultrasonic sieving apparatus (10) is described which comprises a de-coupler (18) for enabling a combination of a transducer (T) and a first resonator (16) to be supported with respect to a sieve which includes a separation medium (14) provided in a fra... | 06/27/2000 |
| 5482165 | Mobile gravel screening apparatus A mobile screening apparatus for gravel and other aggregates includes a three sided box adapted to rest on the ground surface. A vibrating screen is located above the box in a tilted, or sloped condition, so that gravel deposited on the screen is in a flu... | 01/09/1996 |
| 5462673 | Cleaning system for vibratory screening devices A vibratory screen apparatus (10) for the separation of solids has a cleaning system to clean the screen bed (15) of adhering solids, such as matted fibrous materials. A water discharge assembly (52) includes a water dispensing tubular member (60) in whic... | 10/31/1995 |
| 5386169 | Device for causing an untuned structure to vibrate ultrasonically The present invention relates to the vibration of an untuned structure by means of an ultrasound converter. The main but not unique purpose is to cause a filtering cloth, a perforated metal sheet or a screening mesh to vibrate in order to improve the flow... | 01/31/1995 |
| 5108626 | Process for recovering course particles from tailings A process for the recovery of coal particles having a maximum dimension of less than 2 mm from coal tailings including the steps of forming a slurry (101) of tailings having a pulp density of from 10 to 30% by weight; feeding the slurry into a hydrocyclon... | 04/28/1992 |
| 5100539 | Dual-screen particle sizing apparatus and method An apparatus and method for sizing and separating particles of a material. The apparatus includes a stand, a frame having a pair of ends and an intermediate portion, and suspension assemblies attached to the stand and the frame for movably suspending the ... | 03/31/1992 |
| 4911834 | Drilling mud separation system A separation system for removing drilled solids from a drilling fluid being circulated in a well including a vibratory screen apparatus (10) and method for separating materials having a base (12) supporting a vibratory support frame (13) for relative vibr... | 03/27/1990 |
| 4900430 | Screen cleaning in CIL and CIP systems In carbon-in-pulp (CIP) and carbon-in-leach (CIL) processes, especially those utilizing pure oxygen instead of normal air to increase the overall efficiency of the cyanide leaching-adsorption process in the recovery of gold and/or silver from ores, the sc... | 02/13/1990 |
| 4861463 | Vibratory screening machine Disclosed is a vibratory screening machine comprising a frame, a pair of screens with meshes of different size, mounted within the frame one above the other, pushers formed by double-arm levers located in the interscreen space and hinged to a support, and... | 08/29/1989 |
| 4505812 | Sieve screen deck A sieve screen deck, the screen of which comprises a plurality of horizontal wedge wires connected to an array of backing bars running longitudinally of the screen parallel to its fall line. The screen is connected to a frame at its two ends, at least one... | 03/19/1985 |
| 4078994 | Apparatus for separating entangled parts A method and apparatus for separating entangled parts includes a receptacle container mounted for reciprocating movement in a vertical direction and having a grid structure at the bottom thereof for supporting and separating component parts which are enta... | 03/14/1978 |
| 3971714 | Hopper screening apparatus A hopper apparatus of a type intended for dispensing granular or powdery materials into a conveying system. A container associated with the hopper apparatus has a pair of tapering walls with a discharge opening therebetween. A conveyor loading chamber bel... | 07/27/1976 |
| 3954604 | Sifting machine A sifting machine having vibration generators connected to the opposite ends of a sieve screen, the vibration generators being so constructed as to vibrate one end of the sieve screen at a relatively low frequency and a relatively high amplitude and to vi... | 05/04/1976 |
