Brush ring

Details Brush ring Brush ring

1998-05-06

2001-03-27

Till, Terrence R. (Department: 1744)

Brushing, scrubbing, and general cleaning

Implements

Brush or broom

C015S082000

Reexamination Certificate

active

06205609

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a brush ring, intended to be used particularly with several corresponding brush rings as a brush that rotates around a longitudinal axis in a brushing machine. Such a brush ring consists of a brush part and a ring shaped frame part, connecting the radially directed brushes forming the brush part, which parts are formed as a uniform entirety preferably from plastic based material, and in which there has been arranged at least a holding means to prevent the brush ring from twisting, when it has been assembled in place to the brush frame of the brushing machine with the other brush rings placed one after another in the longitudinal direction. The touching point of the radially directed outer circle of the brush part of the brush ring has been arranged as to change within the whole breadth of the brush ring, to achieve an essentially unbroken brush touch in the longitudinal direction of the brushing machine to the object being brushed continuously regardless of the length of the brushes, when the brush rings forming the brush keep rotating around the longitudinal axis.
BACKGROUND OF THE INVENTION
These type brush rings described above are being used to form brushes in most heterogeneous sweeping lorries and brushing machines. The brush rings being used today usually comprise a ring shaped frame part that has been bent to a circumferential shape, when viewed in a perpendicular direction with respect to the longitudinal direction of the brushes, and is usually made of thin sheet iron, the thickness of which is e.g. about 1 mm and in which the brushes have been attached e.g. by means of suitable solidifying attachment mass. These type of brush rings are usually plane shaped, when viewed in the longitudinal direction of the brushes, when the aim is to produce brushes having a particularly good quality.
Those type brush rings, that are partly made of metal, tend to break particularly because of cold conditions, due to stiffening of the brushes. As a result, the sheet iron frame supporting the brush part of the brush ring may open in certain places, in which case bigger or smaller units of brush parts are released from the brush ring. In addition to that, in the type of brush rings described above having metal frames and plastic brushes, that reuse of the same is impossible in practice, because removing of the frame sheet iron from the brushes is not economically justified in practice. That is why these brush rings are removed as a whole to the dumping area, creating a significant waste problem. Furthermore, when brush rings described above, are being used, very strongly built supporting structures must be used, such as space rings made of metal, fastening rings etc., which is why a brush made with these kinds of brush rings becomes disproportionately expensive.
On the other hand from Finnish Patent No. 87977, a brush element is previously known, that is entirely made of plastic based material. The brush elements being produced by the method described in this patent, are plane shaped, when viewed in the longitudinal direction of the brushes, and due to wearing of the brushes, the brushing of the brush formed of the brush rings becomes uncontinuous in the longitudinal direction of the brush particularly in the jointing points of the brush rings. As a result, the brush is not able to fulfil conventional demands, that are needed in certain purposes, because material to be brushed may go through the brush without touching the brushes, in which case the brush must be dismantled and the brush rings of the same replaced.
On the other hand solutions corresponding to a certain extent to the brush ring described above have been presented in documents FI 40453, DE 39 14 745 and FI 2140/70, also, whereby in the two formerly mentioned documents there has been presented a brush ring that extends sidewards in a so called zig-zag style, but in both of which the actual frame part of the brush ring is formed as a metal structure e.g. from injection molded aluminium (FI 40453) or bent sheet iron (DE 39 14 745). Thus neither of the above enables an entirely recyclable and reusable entirety, which fact has a crucial meaning particularly nowadays. Additionally, the type of solutions described above are very complicated, that is why manufacturing costs of the same are disproportionately high. With the type of solutions in question it is not possible to reach an adequate measuring precision, which weakens functioning of the brush formed of the brush rings and shortens its operating time. The solution presented in document FI 2140/70 differs very clearly from the above, which does not describe the frame part and the brush part of the brush ring made of the same recyclable material. In addition to that, in this solution separate metal sockets to be bent in shape are requested for attachment of the brushes to the frame part as well as binding plates placed on both sides of the actual frame part. In this solution the frame part does not either include an essentially circumferential frame part, when viewed in a perpendicular direction with respect to the longitudinal direction of the brushes, but instead an actual rotating center and a circle part connected to the same with radially directed ribs.
SUMMARY OF THE INVENTION
It is the aim of the brush ring according to this invention to achieve a decisive improvement in the problems presented above and thus to raise substantially the level of knowledge in the field. To achieve this aim, the brush ring according to an embodiment of the invention is primarily characterized in, that the brush ring, such as the brush part and the frame part, is entirely made of recyclable, and preferably the same, manufacturing material, such as polypropylene or the like, and, the frame part, that is essentially circumferential, when viewed in a perpendicular direction with respect to the longitudinal direction of the brushes of the brush ring, has been arranged to project in at least two places sidewardly from the ground level of the same, preferably with a constant wave form.
As the most important advantages of the brush ring according to the invention simplicity and reliability of construction and use of the same may be mentioned. In addition to that, with the present invention, it is possible to produce brush rings, at the low manufacturing cost and at the same time having a higher quality than present brush rings. With the present invention the brushing result stays optimal with a view to the brushing effect significantly longer than with present brushes despite wearing of the brushes, that is in principle till the end of the brushes. In addition to that, the brush ring according to the invention brings also has economical advantages with respect to present solutions, since collecting of the brush out of brush rings according to the invention does not require supplementary auxiliary devices, that is why no supplementary measures are required during mounting. The brush ring according to the invention may be made very environmentally friendly by producing both the frame part and the brush part essentially from the same plastic based material, in which case reuse of the brush ring is enabled easily by e.g. grinding the entire used brush ring into pieces. When exploiting advantageous manufacturing techniques, the brush ring according to the invention may made very exactly measured as well as well-balanced, when compared particularly to present corresponding brush rings, in which unbalance wears the brush unevenly and thus also the brushing machine e.g. due to vibration. The brush rings being placed according to the invention directly against each other one after another, are furthermore in contact with each other e.g. by means of partly plane shaped contact surfaces, in which case the brush rings may not “swing” with respect to each other as is the case with present brush rings.


REFERENCES:
patent: 2320384 (1943-06-01), Peterson
patent: 3038189 (1962-06-01), Harr
patent: 3090062 (1963-05-01), Nelson
patent: 3274634 (1966-09-01),

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