초록 ▼

A method and apparatus for drawing and measuring an amount of liquid agrichemical and dispensing the measured amount of agrichemical for mixture with water and eventual application onto a field. The agrichemical is drawn into a measuring vessel by suction pressure, created in one embodiment by an ai

A method and apparatus for drawing and measuring an amount of liquid agrichemical and dispensing the measured amount of agrichemical for mixture with water and eventual application onto a field. The agrichemical is drawn into a measuring vessel by suction pressure, created in one embodiment by an air compressor and valving system, and in another embodiment by a valve-pump in conjunction with a 3-way valve. The agrichemical is then dispensed from the measuring vessel either by positive pressure created by the same air compressor/valving system, or by suction pressure created by valve-pump/3-way valve. The valve-pump provides both a mixing chamber for the agrichemical and water prior to tank storage for eventual application, and controllable suction pressure for drawing the agrichemical out of the measuring vessel for mixing. The valve-pump is also self-cleaning thereby reducing the possibility of cross-contamination.

대표청구항 ▼

An apparatus for drawing a desired measured volume of concentrated liquid agrichemical stored in a bulk tank and dispensing the measured volume for mixing with a diluent, the apparatus comprising: a measuring vessel of a predetermined volume, said measuring vessel having a fluid inlet adapted to be

An apparatus for drawing a desired measured volume of concentrated liquid agrichemical stored in a bulk tank and dispensing the measured volume for mixing with a diluent, the apparatus comprising: a measuring vessel of a predetermined volume, said measuring vessel having a fluid inlet adapted to be in fluid communication with the bulk tank, a fluid outlet for fluid communication with a dispensing device, and an air passage in communication with an interior of said vessel; means for creating a suction pressure and a positive pressure; and a valve in communication with and between said suction and positive pressure creating means and said air passage selectively applying one of a suction pressure and a positive pressure to said air passage, wherein when suction pressure is applied to said air passage the concentrated liquid agrichemical is drawn from the bulk tank and into said fluid inlet of said measuring vessel in order to fill said measuring vessel, and when positive pressure is applied to said air passage the concentrated liquid agrichemical within said measuring vessel is dispensed from said fluid outlet of said measuring vessel, said valve having a selectable vent position wherein air at atmospheric pressure is communicated to the interior of the vessel, whereby filling of the vessel can be rapidly halted.