Dispensing – With cutter and/or punch – To form dispensing opening in container
Patent
1990-10-23
1994-10-18
Kashnikow, Andres
Dispensing
With cutter and/or punch
To form dispensing opening in container
222 89, 222327, 222386, 222630, B67D 500
Patent
active
053560361
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to chemical supply devices for chemical handling systems, such as agricultural or horticultural or forestry sprayer systems, and to chemical containers for attachment to such devices.
Agricultural or horticultural or forestry sprayer systems are commonly of a type which includes a reservoir for supplying a dilutant and a spray head for spraying a mixture of the dilutant and a chemical concentrate. The chemical concentrate is supplied in a container and requires to be diluted with a dilutant, generally water, prior to use, the container being subsequently rinsed out with the dilutant. This diluting operation is commonly performed manually, but this is unsatisfactory because of the risk of chemical concentrate being spilled and the danger of the user coming into contact with the concentrate, and also because of the difficulty in accurately measuring the concentration of the chemical in the solution.
The requirements for minimizing the risk of chemical contamination, for ensuring accurate metering and for rinsing of containers are embodied in Great Britain in the Food and Environment Protection Act 1985, the Pesticides Regulations 1986, the applicable Codes of Practice and recommendations from the Health and Safety Executive (C.O.S. H.H. regulations), and in similar codes in other countries.
SUMMARY AND OBJECTS OF THE INVENTION
It is an object of the invention to enable handling of chemical concentrate with or without dilutant with accuracy and safety.
According to one aspect of the present invention, there is provided a chemical container for attachment to a chemical supply device for a chemical handling system, the supply device including a conduit for supplying a quantity of chemical to the system, characterised in that the chemical container comprises a cylindrical casing for containing a quantity of chemical adapted at one end to be detachably received in a seating of the supply device and having an outlet at said one end positioned so that, when the casing is received in the seating, the outlet is in communication with an injection orifice opening into the conduit of the supply device, and an actuator which is actuable to force a quantity of chemical from within the casing through the outlet into the conduit by way of the injection orifice.
The chemical container will generally be supplied ready filled with chemical concentrated and is attachable to the supply device for direct injection of chemical concentrate into the conduit. However it is also within the scope of the invention for the container to be filled with chemical concentrate only after attachment to the supply device.
It is preferred that the actuator comprises a plunger which is displaceable to move a piston axially within the casing. The plunger may be detachable from the container.
Conveniently the casing has a bayonet connector at said one end for engaging a complementary formation on the seating.
According to another aspect of the present invention, there is provided a chemical supply device for a chemical handling system, wherein the supply device includes a conduit for supplying a quantity of chemical to the system, characterised in that the supply device also includes an injection orifice opening into the conduit, and a seating for detachably receiving a receptacle from which a quantity of chemical is to be supplied to the system, a duct placing the inside of the receptacle in one-way communication with the injection orifice when the receptacle is received in the seating so as to enable a quantity of chemical to be injected from the receptacle into the conduit by way of the injection orifice, and a rinsing pipe opening into the duct so as to enable rinsing fluid to be supplied to the receptacle by way of the rinsing pipe and the duct.
The use of such a supply device in a sprayer system enables chemical concentrate to be injected directly from the receptacle into a flow of dilutant so that the resulting mixture of the dilutant and the chemical concentrate may be supplied directly
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Kashnikow Andres
Kaufman Joseph A.
Wisdom Agricultural Limited
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