The present disclosure is broadly concerned with a mechanical squeegee device for use in clearing liquid materials from the inside of a clear or translucent circular tube in order to aid the user in observing the liquid level in the tube after refilling.
The agriculture industry applies coatings called seed treatments to the exterior of seeds prior to planting them. These coatings contain substances that act as fungicides, insecticides, nematicides, growth boosters, fertilizers, inoculants, and the like that are beneficial to the young plant in the initial stages of germination and growth. These substances are often applied in a ratio to the seed as expressed as fluid ounces per weight of seed. In order to accurately apply the treatments in the proper ratio, the seed flow rate is controlled to a known rate and treatments are typically pumped onto the seed at the proper flow rate (fluid ounces per minute) to achieve the proper ratio of treatment to seed, then it is mixed in a horizontally oriented drum, and discharged to a receiving container. In order to achieve the proper flow rate (fluid ounces per minute), a calibration method is employed to either proper set the speed of the treatment delivery pump, or to calibrate an electronic volumetric flow meter so that it will accurately measure the treatment flow rate.
The aforementioned calibration method commonly employs a closed calibration system including a vertically oriented clear tube that is marked in ounces. Treatment materials are pumped into the tube for a known amount of time to determine the flow rate. This is used then to either set the speed of the pump, or to correct the flow meter reading in the case where a flow meter is used. In some cases the clear tube is also capped on the top end with an over flow tube secured into the cap that will direct any fluid reaching that point into a contained vessel. Thus if the tube is over filled, the treatment materials will be contained avoiding any contact with the equipment operator and any spills. Thus calibration systems have been designed where they are completely enclosed (a closed calibration system) providing an advantage over using graduated cylinders or pitchers in that they reduce the likelihood of operator contact with the treatment materials that are often hazardous.
One frustrating issue remains with closed calibration systems of this type is that the treatments tend to cling to the inner wall of the clear or translucent tube. The treatment materials are not translucent. Therefore, once the tube is filled, then drained, it is impossible or very difficult to be able to accurately observe the treatment level upon refilling due to the treatment materials from the previous fill still clinging to the interior wall of the tube. Some operators have resorted to cleaning the tube, but this typically requires that the tube be removed and washed, thus negating any benefits to having a closed calibration system because it exposes the operator to the treatment materials and provides opportunities for spills.
There are some devices currently known to those skilled in the art that serve to clean the interior wall of a clear or translucent tube. The most common device of this type is a syringe typically used in the medical industry that wipe the interior wall of the tube as the plunger is depressed.
In addition, a device called the “Swabbie Skimmer Neck Cleaner from Avast Marine Works (http://www.glassreef.com/review swabbie.php) uses a rotating action to clean the inside of a round tube using a squeegee attached to an arm that wipes the interior of the tube to clear it of debris.
The present invention provides a greatly improved method of removing a film of liquid seed treatment from the inner surface of a transparent or semi-transparent tube after the liquid seed treatment is drained from the tube so that the liquid level from a subsequent filling of the tube can be readily observed. In addition to removing the film of liquid, the present invention also provides a means to allow for overflow of the tube by allowing liquid to pass the removal device and reach an over-flow point located at the top of the tube. In addition, the present invention provides a means of sealing the entry point of the actuating device into the tube so that liquid seed treatment does not leak out of the tube. The features of the present invention maintain the closed nature of the system so that it is not required that the operator contacts the seed treatment liquid and that no spills or leaks occur.
As required, a detailed embodiment of the tube squeegee invention is disclosed herein; however, it is to be understood that the disclosed embodiment is merely exemplary of the tube squeegee which may be embodied in various forms. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for claims and as a representative basis for teaching one skilled in the art to practice the invention in virtually any appropriately detailed structure.
Referring now to the drawing figures,
Number | Date | Country | |
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61643538 | May 2012 | US |