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| Number | Title | Issue Date |
| 4381237 | Sludge robot A sludge robot for the removal of sludge from sedimentation tanks having planar bottoms comprises a rising tube (3) and two tube arms (5, 8) which are interconnected by two motor couplings (1, 2), by means of which the tube arms can be steered along a pre... | 04/26/1983 |
| 4379057 | Method for the cyclic regeneration of water-softening systems and programmed water-softening system for applying the method Ion exchange medium in a water softening system is regenerated cyclically, in response to both a preset timer and a metering device responsive to the degree of hardness of the untreated water and the degree of exhaustion of the ion exchange medium, by slo... | 04/05/1983 |
| 4366069 | Coolant recovery system A process for recovering an industrial coolant fluid from a contaminated mixture and restoring the recovered coolant fluid to a predetermined concentration level and an apparatus for carrying out the process are disclosed. The process includes the followi... | 12/28/1982 |
| 4136032 | Liquid treatment apparatus A flow control valve for multicycle liquid treatment apparatus has a pair of rotatable, slotted circular discs at its opposite ends. Rotation of the discs causes the slots to be selectively aligned with various ports, passages, holes and channels so as to... | 01/23/1979 |
| 4124507 | Reciprocating vacuum filter A filtering apparatus with hollow filters that are alternately placed under reduced pressure and positive pressure. The filters are reciprocally rotated through a cycle along a 180° arcuate path from immersion in the unfiltered liquid to a discharge stat... | 11/07/1978 |
| 4102782 | Method of sample introduction in the micro liquid chromatography and the apparatus therefor A method of accurate sample introduction, while holding a good reproductivity, into a chromatographic system by means of employing a pulse-motor as a driving source of a syringe for holding the mobile phase, inversely rotating the same pulse-motor by impa... | 07/25/1978 |
| 4046693 | Scum skimmer apparatus Scum skimmer apparatus having a skimmer blade slideably disposed on support rods extending downwardly from an oscillating bridge which is moveable over the clarifying tank in a biological waste treatment plant. An air tight ballast chamber is secured to t... | 09/06/1977 |
| 4018685 | Automatic liquid mixing device A device for mixing a plurality of liquid components in preselected proportions to form a mixture of the liquid components. The device includes a separate liquid component storage reservoir for each liquid component, a pump, means to successively connect ... | 04/19/1977 |
| 4012211 | Filter for occupant restraint system fluid supply A filter assembly is provided for a cylindrical radial flow fluid supply having a combustible gas generator which is used to inflate a confinement for an occupant restraint system upon the occurrencee of a collision. The filter assembly includes a plurali... | 03/15/1977 |
| 3992298 | Dewatering machine A dewatering machine comprising an integral and cooperative combination of a vacuum filter of the rotary drum type and an expression device of the type wherein a diaphragm is pressed against a drainage deck. An intermittently-indexed first endless filter ... | 11/16/1976 |
| 3980560 | Filter construction The invention contemplates a remotely serviceable filter of the type which accumulates a filter cake which must be periodically removed. An upper casing half is fixed, and a lower casing half accumulates the filter cake and is movable to a cake-discharge ... | 09/14/1976 |
