Title:
Vibrator
United States Patent 2214142


Abstract:
My invention relates to improvements in vibrators and similar devices. My invention relates more particularly to improvements in vibrators for use in compacting plastic, semi-plastic and semi-liquid masses in order to secure a denser and more solid mass. The principal object of the present...



Inventors:
William, Mall Arthur
Application Number:
US20044438A
Publication Date:
09/10/1940
Filing Date:
04/06/1938
Assignee:
William, Mall Arthur
Primary Class:
Other Classes:
172/41
International Classes:
B06B3/00; E04G21/08
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Description:

My invention relates to improvements in vibrators and similar devices.

My invention relates more particularly to improvements in vibrators for use in compacting plastic, semi-plastic and semi-liquid masses in order to secure a denser and more solid mass.

The principal object of the present invention is to provide a vibratory mechanism which may be inserted within unset concrete or other similar materials and which produces high frequency radial vibrations.

A further object of my invention is to provide an improved vibrating machine which will place and compact a given mass of concrete in less time than has heretofore been possible.

A further object of the present invention is to provide an improved construction of vibrating mechanism whereby a maximum amount of unset concrete or other similar material may be worked upon at one time.

The vibrators or vibratory mechanisms at present on the market are in the form of an elongated shell or cylinder within which an offset weight is revolved at a high rate of speed. These vibrators are ordinarily driven by means of a flexible shaft or by a fixed shaft from a motor or other source of power remotely placed from the vibrator. It is a well known fact that the proportion of the diameter to the length of the vibrating mechanism and the rate of speed at which the unbalanced weight is driven, and the size of the same control the area which is affected by the vibrations that are produced.

The principal object of the present invention is to provide an improved vibrator of the type described capable of causing vibrations throughout a greater area than has heretofore been.done with a vibrator and power of the same size and amount as heretofore described. This object is accomplished by providing a plurality of arms or extensions from a collar welded or otherwise rigidly secured about the exterior of the vibrator casing so that the vibrations will be transmitted through the arms or extensions.

A further object of the invention is to provide by the use of arms such as I have mentioned, a platform or support for the vibrator when not in use. By transmitting the vibrations from the vibrator casing through the various arms which I have described, it will be obvious that more energy can be applied to the compacting of the unset concrete and a greater area can be worked upon at the same time, thus mal5 terially diminishing the amount of time or labor required to compact a given quantity of poured or unset cement.

Other objects and advantages-will be more apparent from the following description wherein reference is had to the accompanying two sheets of drawings upon which Fig. 1 is a side elevational view showing generally a motor, a flexible shaft drive and my improved vibrator; Fig. 2 is a plan sectional view through the vibrator taken generally on the lines 2-2 of Fig.l; Fig. 3 is a fragmentary side elevation of the upper portion of the vibrator with parts broken away in section to more clearly show other parts; Fig. 4 is a horizontal sectional view similar to Fig. 2 of a modified form of construction; Fig. 5 is a horizontal sectional view similar to Fig. 2 of a still further modified form of construction; Fig. 6 is a horizontal sectional view similar to Fig. 2 of a further modified form of construction; Fig. 7 is a horizontal sectional view similar to Pig. 2 of a further modified form of construction; Fig. 8 is a side elevational view of the modified form of vibrator construction shown in Fig. 7; Fig. 9 is a side elevational view of a further modified form of vibrator construction; and Fig. 10 is a side elevational view of a motor and vibrator assembly using a comparatively rigid shaft and housing. In the embodiment of my invention which I have chosen to illustrate, I have shown an electric motor 10 provided with a plurality of supporting handles 12 and a conduit 14 leading from a suitable source of electrical energy. I provide a flexible shaft drive 16 extending from the motor to the unbalanced weight 18 in the inside of housing 20 of the vibrator. The motor, flexible shaft and vibrator may be generally similar in construction to that shown and described in my copending application for patent, Serial Number 18,269 now matured into Patent #2,148,765 dated February 28, 1939. Since a detailed description of the various elements is provided in that application, further description of these parts will not be provided herein.

In order to be able to operate in a larger area than is possible with the vibrator housing 20 alone, I have provided a ring 22 secured about the exterior surface of the vibrator housing 20. 60 I provide a plurality of radially extending arms 24 which extend from the housing 20 of the vibrator and terminate in downwardly extended portions 26. The extensions 26 are preferably of a length to extend beyond the lowest portion 65 of the vibrator 20 so that when the mechanism is not in use the extensions may serve as a support for the vibrator.

In Fig. 4 I have shown a modified form of the invention in which the arms 24a have been extended tangentially from the supporting collar 22. In view of the fact that the unbalanced weight 18 is being revolved at a high rate of speed, I have found that the vibrations are somewhat more effective by reason of this type of construction.

In Fig. 5 I have shown a still further modified form of construction in which I have provided the arcuately shaped arms 24b extending radially and tangentially from the collar 22.

While in the above mentioned forms I have preferably shown the arms and their extensions as hollow tubular members to secure greater vibratory effect therefrom, they may also be formed of rod members. Thus, in Figs. 7 and 8, I have shown the arm members 24c in the form of comparatively small rods, and to increase the amount of vibration about the area of the vibrator, I have provided a large number of radially extending arms.

In Fig. 6 I have shown a still further modified form of construction wherein I have provided a plurality of radially disposed arms 24d spaced approximately 1200 apart. This type of construction is particularly effective as a support for the vibrator when not in use by reason of the fact that the same may be firmly supported upon the tripod construction upon uneven surfaces.

In Fig. 9, I have shown a still further modified form of construction wherein I provide a pair of oppositely directed radially extending arms 30, provided with a plurality of downwardly depending finger means 30a. A vibrator constructed in this manner may be used for compacting con4oy crete in comparatively narrow wall formations when the concrete is poured between forms.

In Fig. 10, I have shown the manner in which the motor 10 and vibrator 20, connected by a comparatively short flexible drive in a semi-rigid shaft housing 16a, permits the supporting the motor and vibrator by the downwardly depending arms 26.

From the above and foregoing description it will be apparent to those skilled in the art that I have provided a construction of vibrator wherein by the use of a given size vibrator housing and motor, the vibrations will effect a larger area, thus enabling workmen to compact a given quantity of unset concrete or similar material in a shorter length of time. The application of the above described type of vibrator is particularly adaptable to floor or bridge deck construction.

It may also be used to advantage in building construction where large surface areas are compacted, such for example as concrete floors and roads.

With the form of construction shown in Fig. 10, it will be obvious that workmen will be relieved from a large amount of fatigue suffered at the present time by reason of the fact that they must always be supporting the comparatively heavy motor 10. By reason of this, fewer workmen will be employed and those employed will perform a greater amount of actual compacting of unset concrete.

While I have illustrated and described a specific embodiment of my invention and some modified forms of the same, it will be obvious to those skilled in the art that changes and modifications may be made in the exact details shown and I do not wish to be limited in any particular. Rather, what I desire to secure and protect by Letter Patent of the United States is: 1. Apparatus of the class described comprising a motor, a flexible shaft driven thereby, a vibrator including a casing and an unbalanced weight connected to the end of said shaft, a semirigid housing for said shaft between said motor and said casing, said casing having a plurality of radially directed arms extending outwardly and beyond the end of said casing whereby said casing and housing are capable of being supported by said arms.

2. In a vibrator mechanism for compacting concrete, a casing, an unbalanced vibratory element rotatably mounted therein, power means for rotating said element, and a plurality of rigid arms rigidly attached to said casing and projecting therefrom, said arms having portions lying in a common plane on either side of and spaced from said casing and vibratory element, and adapted to vibrate in unison with said casing so as to effectively transmit vibrations to the surrounding concrete throughout the entire extent of said arms.

3. In a vibrator mechanism for compacting concrete, a casing, an unbalanced vibratory element rotatably mounted therein, power means for rotating said element, and a plurality of rigid arms rigidly attached to said casing and projecting therefrom, said arms having portions radiating therefrom in at least three directions spaced from each other by angles of less than 1800 and terminating in spaced, substantially parallel portions embracing a space in which said casing and vibratory element are located, and adapted to vibrate in unison with said casing so 40ý as to effectively transmit vibrations to the surrounding concrete throughout the entire extent of the said arms.

4. In a vibrator mechanism for compacting concrete, a casing, a vibratory element disposed in said casing and adapted to develop vibration therein, a plurality of rigid arms rigidly attached to said casing and projecting therefrom, said arms having portions embracing a space in which said casing and vibratory element are located, 60: and adapted to vibrate in unison with said casing so as to effectively transmit vibrations to the surrounding concrete throughout the entire extent of said arms.

5. A vibrator mechanism as defined in claim 4 65: wherein the direction of vibration of said vibratory element is transverse to the embracing portions of said arms.

6. In a portable vibrator for compacting concrete and the like, a motor, a vibrator casing, a 6. vibratory element in said casing, a drive shaft housing, attached at its respective ends to said motor and casing, and adapted to transmit support from one to the other, and a plurality of vibration distributing arms circumferentially spaced less than 1800 from each other and attached to said casing and extending at least as far as or beyond the end thereof remote from the motor so as to provide means for supporting said casing and motor in an upright position.

ARTHUR WILLIAM MALL.