Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 6250479 | Rotationally oscillating separator with eccentric shaft mounting portions A rotationally oscillating separator for separating mixed rice into unhulled rice and unpolished rice after the rice have passed through a rice huller to remove the hulls from rice. The separator comprises a vertical rotating shaft supported for rotation ... | 06/26/2001 |
| 5148922 | Gravity particle separator A gravity separator for the separation of heavier particles from lighter waste material comprises a stack of decks (4) mounted for resonant oscillatory motion within a supporting frame (1). A motor (9) oscillates the decks at their resonant frequency whil... | 09/22/1992 |
| 5059311 | Method and apparatus for separating particulate solids An improved process and apparatus for separating particulate solids based on differences in their specific gravities through agitation in alternating upward and downward water/liquid currents generated by discharges from a water/liquid column of fluctuati... | 10/22/1991 |
| 5024334 | Method and means for gravity table automation A system for gravity table separation including a gravity table for separating materials and a detector operatively associated with the gravity table for detecting the movement of control particles with respect to the gravity table during its operation. T... | 06/18/1991 |
| 4997551 | Concentration for beneficiating minerals A concentrator comprises a beneficiating member (1) in the form of a bowl with a tapered bottom (2) a concavity of which is provided with a discharge hole (13), and a drive mechanism (5) a hollow drive shaft (8) of which accommodates eccentrically a shaft... | 03/05/1991 |
| 4946586 | Gravitational separation A shaking table for ore-dressing, having riffles on its deck, has circular orbital motion imposed on it to cause the riffles to oscillate, and for a standing wave to be created between the riffles. The continued circular motion acting on the standing wave... | 08/07/1990 |
| 4842146 | Pulsator for enriching, particularly hard coal A pulsator for enriching, particularly, hard coal has mounted in a pulsating compartment a hoisting wheel and a bracket both mounted on a drive shaft, or a ratchet wheel mounted on a drive shaft which runs in bearings above the liquid level of a working t... | 06/27/1989 |
| 4563271 | Percussion jig The invention relates to a percussion jig in which the carrier for material to be separated is freely suspended in the region of its centroidal axis on the piston rod of a hydraulic drive cylinder. This results in a particularly simple construction subjec... | 01/07/1986 |
| 4363726 | Ore concentrator A spiral-type ore concentrating wheel has a plurality of interleaved, spiral bands tapering in height uniformly from the periphery of the wheel to its central, discharge aperture for moving concentrates to the aperture while the wheel is oscillated back-a... | 12/14/1982 |
