Vibrating screed and method of making same

Details Vibrating screed and method of making same Vibrating screed and method of making same

2000-02-04

2001-11-27

Bagnell, David (Department: 3673)

Road structure, process, or apparatus

Apparatus

Means to agitate material

C424S118000, C425S456000, C029S414000, C029S898070

Reexamination Certificate

active

06322286

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates a vibrating device for processing a floor layer, more particularly a so-called vibrating beam or screed, of the type substantially consisting of a vibrating board, a vibrating mechanism cooperating with the vibrating board, and a handle, whereby the vibrating mechanism substantially consists of an eccentric seated in bearings and a motor for driving the eccentric, and the bearings and the eccentric born therein are fixed by means of a clamping mechanism.
2. Related Art
Such vibrating devices are applied for spreading and smoothing of hardenable materials when forming a floor layer, more particularly materials such as concrete and similar.
The known embodiments of such vibrating devices show the disadvantage that the mounting thereof is rather complicated and, consequently, time-consuming
This is for instance the case with the vibrating device disclosed in U.S. Pat. No. 5,244,305. This device comprises a rotating off-center weight borne in a vertical collar which is mounted on a framework consisting of a horizontal strip and two vertical strips bolted to the horizontal strip and clamped by bolts onto the vibrating board.
The invention aims at a vibrating device, more particularly a vibrating beam, which does not show this disadvantage.
The invention also aims at a vibrating device in which the eccentric is fixed in the vibrating device in a very efficient manner.
SUMMARY OF THE INVENTION
To this end, the invention aims at a vibrating device of the aforementioned type, with the characteristic that the clamping mechanism substantially consists of, on one hand, a body in which a seat for the bearings is provided, said body being split apart at one side of the seat, such that the body shows at least two portions which can be drawn towards each other, and, on the other hand, tensioning means for drawing the aforementioned portions towards each other and thereby clamping the bearings of the eccentric in the seat.
The clamping mechanism is constructed in such a manner that it shows a minimum of parts, which allows for a rapid mounting and dismounting.
U.S. Pat. No. 4,650,366 describes a vibrating device having an elongated beam comprising tubular sections wherein a vibrating shaft is mounted by means of loose bearings. Sleeves are secured by set screws fit tightly on the vibrating shaft and mount said bearings so as to fit loosely within the tubular section.
According to the invention, preferably, the aforementioned body consists of an extruded body, whereas the aforementioned seat is formed by a through channel in this body.
Furthermore, this body preferably comprises also a number of provisions which allow to establish a connection with the other components, such as the motor, the handle, and the vibrating board. These provisions may consist of profiles for the attachment of the handle and the motor, as well as flanges, for example, for connecting the body to the vibrating board. The use of such profiles and flanges offers the advantages that these can easily be formed at the body by means of extrusion, and that they allow for a relatively simple connection with the other components.
The invention also relates to a method for the construction of such a vibrating device, which method comprises the steps of extruding a profile, whereby this profile, during the extrusion, is provided with a cylindrical channel; forming of a body out of the profile by separating a well-defined length from the profile; arid finally assembling the body, the vibrating board, the vibrating mechanism, and the handle; with the characteristics that the body is split apart at one side by applying, before or after the separation of the body, a recess in the body which recess continues up into the channel, such that the body shows at least two portions which can be drawn towards each other; and that, after assembly, the eccentric is clamped at its bearings into the aforementioned body by drawing to each other said portions.


REFERENCES:
patent: 4650366 (1987-03-01), Morrison
patent: 4832525 (1989-05-01), Morrison
patent: 4838730 (1989-06-01), Owens
patent: 5212995 (1993-05-01), Robinson et al.
patent: 5244305 (1993-09-01), Lindley
patent: 5803656 (1998-09-01), Turck
patent: 5857803 (1999-01-01), Davis et al.
patent: 6089787 (2000-07-01), Allen et al.
patent: 6200065 (2001-03-01), Eitzen
patent: 562248 (1957-11-01), None

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