Liquid dosing device capable of being attached to hand sprayers with a piston pump system

Abstract

The present invention relates to a liquid-volume dosing device, which can be attached to lever-activated hand sprayers, as a general rule backpack sprayers, replacing the pressurizing / ''pump'' system(cylinder + piston and plunger + pressure accumulator) present in said spraying equipment and sharing the same lever-activation (''pumping'') system (1). The entire dose-regulating system is operatedindependently of components present in the sprayer to which it will be fitted.

Description

technical field [0001] The present invention relates to a device for volumetric dosing of liquids which can be coupled to a manual sprayer actuated by a lever usually carried on the back. [0002] The invention is designed for use with a wide class of liquid substances, in particular for complex forestry sector products (e.g. phytosanitary, phytohormone and phytonutritional products), and is also suitable for use in certain situations due to the physicochemical properties of the substance As well as the needs of the mode and mechanism of action, the targeted administration of precise doses is required. [0003] Instead of a pressurized or "pump" system, the present invention proposes a system comprising: [0004] cylinder; [0005] piston; [0006] plunger; [0007] pressure accumulator. [0008] These existing components of the sprinkler devices of the prior art have been replaced by the present invention. The present invention shares the same activation system via the ...

AI Technical Summary

Problems solved by technology

[0022] In the first case ("ready to use"), the main disadvantage contained in the proposals PI 0404632-3 and MU8502994-7 is that they are not suitable for the main backsprayers present on the market, and therefore, mainly when considering Their use in applications on agricultural plants, which are primarily devices requiring the user to specifically dispense liquids in hygienic operations involving liquids

[0023] In addition to this, MU8502994-7 proposes the same activation method (push-pull type lever) as the previously cited PI 0101840-0, which makes it impossible to use in the rear box, since the activation device remains out of the reach of the operator, and thus limiting the use of larger volumes for loading (in tanks) and dispensing

[0024] Regarding the MU8902140-1, although the device has two functions (spraying and dosing applications), the physical limitation is due to its inability to use other tanks / equipment available in the market which have been widely accepted by field users and therefore , the model limits the autonomous capabilities offered by the model and the volume of the device's capacity (in milliliters)

[0025] In the case of "Accessory Sprayers", with respect to known technologies such as PI 0204967-8 and MU8500919-9, when analyzing them individually, due to the need to make holes in the pumping rods of the equipment to which they are to be installed, The connecting bearings of the oscillating device can thus be installed, so the former presents great difficulties in the field of installation; while the latter, due to its construction and arrangement on the back equipment for which it is designed, leads to ergonomically inappropriate working position, mainly with respect to adjustment options for lower volume applications, where the actuation of the lever is limited to the upper end of its path, and as such

H, To be able to activate it, the operator is forced to keep his elbow bent laterally, shifting it from the sagittal plane, resulting in an improper and uncomfortable position, which may cause repetitive strain injuries within the short time of use ( RSI)

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