US1954143A - Churn dasher - Google Patents

Description

April 10, 1934. c MORRISON 1,954,143

CHURN DASHER Filed May 25, 1933 2 Sheets-Sheet l 7 5 5 7 5 l 3 W 2 v 5 1 l 3 J I Cor'nelzusjfofimsonsmmor (lttornegs,

April 1934- c. MORRISON 1,954,143

CHURN DASHER Filed May 25, 1933 2 Sheets-Sheet 2 Patented Apr. 10, 1934 I UNITED STATES PATENT OFFICE This invention relates to a churn dasher of the plunger type and one of the objects is to provide a device of this character which, when moved in either direction, will divide the liquid in the *path thereof into separate streams which will flow through the plunger along converging lines thereby to thoroughly break up the fatty globules and insure rapid production of butter. I A further object is to provide a dasher of this character which can be produced readily, is durable in construction, and can be easily operated. A still further object is to provide a dasher which does not require any separate moving parts. With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claim, it being understood that changes may be made in "the construction and arrangement of parts without departing from the spirit of the invention as claimed.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings:

Figure 1 is a top plan view of the dasher.

Figure 2 is an elevation thereof.

Figure 3 is a bottom plan view.

Figure 4 is a section on line 4-4, Figure 1.

Figure 5 is a section on line 5-5, Figure 1 showing the direction of flow of the liquid during the up-stroke of the dasher.

Figure 6 is a section on line 66, Figure 1 showing the direction of flow of liquid during the down-stroke of the plunger.

Referring to the figures by characters of reference 1 designates a disc of sheet metal of requisite strength and constituting the body of the dasher. The periphery of the disc is strengthened by providing it with an annular flange 2 inclined downwardly and outwardly so as to constitute a means for deflecting liquid inwardly toward the center of the dasher during the down-stroke thereof and for deflecting the liquid outwardly from the dasher during the up-- stroke.

The center of the disc 1 is provided with a hub 3 formed of opposed frusto-conical portions extending in opposite directions respectively from the disc and both merging into tubular extensions 4. Webs 5 are fitted in the angles formed by the extensions 4, disc 1 and hub portions 3, webs 5 at one side of the disc being preferably in line with the centers of the spaces between the webs at the other side of the disc. The webs on each side of the disc cooperate to form channels whereby during the movement of the dasher in one direction the body of liquid in the path thereof will be separated into broad streams flowing between the webs and deflected by the ad- I:

jacent hub portion 3 onto the surface of the disc 1.

At the outer end of each of the webs 5 there is formed a radial slot 6. If there are four webs at each side of the disc, as in the structure illustrated, there will be six of these slots, all of the same size and all of the slots being equally spaced. Between every two slots 6 are provided two opposed deflecting wings 7 and 8 each of which is substantially triangular. The wings 7 are inclined upwardly While the wings 8 are inclined downwardly. The upwardly extending Wings 7 are located nearest the upper webs 5 while the downwardly extended wings 8 are located nearest the bottom webs 5. The free edges of the wings 7 are curved downwardly at the outer corners of the wings as shown at 9 to form deflecting lips and the corner portions of the lower wings 8 have curved upwardly to a slight extent to form deflecting lips 10.

Each pair of oppositely pitched wings cooperate to form an inclined passage 11 as will be apparent by referring to Figures 5 and 6, this passage being extended from an opening 12 at the inner end thereof close to the hub portion 3.

A sleeve 13 is secured within the extensions 4 and provides means for receiving the handle 14 of the dasher. This handle can be secured in place in any suitable manner, as by a screw or other fastening device 15 extending through the sleeve 13 and into the handle.

With the dasher constructed as described a very thorough agitation of the liquid is produced. When the dasher is pulled upwardly in the body of liquid, that portion of the liquid thereabove will be divided into streams which will flow straight downwardly through the several slots 6. At the same time portions of the liquid adjacent to the tubular extensions 4 will be deflected radially by the upper hub portion 3 and encounter other portions of the liquid above the dasher which have not been deflected in this manner. Consequently a certain amount of agitation will result above the dasher. Other streams of liquid will flow into the spaces 11 where they will be deflected under the wings '7 by the depending wings 8. This will produce downwardly converging streams of liquid which will flow against the streams escaping through the slots 6 and an excessive agitation will thus be produced below the disc under each group of openings 6 and 11.

In addition to the foregoing agitation some of the liquid above the dasher will be deflected by the wings 7 toward the slot 6, there becoming thoroughly agitated with the liquid approaching the slots from above. Thus it will be noted that during the up-stroke of the dasher a very thorough agitation of the liquid both above and below the dasher will take place.

During the downward stroke of the dasher the foregoing action will be repeated but reversed as indicated by arrows in Figure 6.

Obviously by providing the dasher with the novel arrangement of webs, slots and Wings which has been described the fatty globules of the cream being treated will be quickly broken up to insure rapid formation of butter.

By rounding the edges of the wings, said wings are stiffened so as to be able better to withstand the pressure to which they are subjected While in use.

Attention is called to the fact that the webs divide the main body of the. liquid in the path of the dasher into substantially four different streams and that each of these streams is in turn divided into three converging streams by the openings formed in the dasher. This is true no matter in which direction the dasher may be moving.

What is claimed is:

A churn dasher including a disc having radial slots, webs on opposed faces of the disc, webs on each face being disposed alternately with the webs on the opposed face and all of the webs being extended to the inner ends of the respective. slots, and a pair of deflecting wings between every two slots, one wing of each pair being inclined beyond one face of the disc and the other vying of each pair being inclined beyond the other face of the disc, said wings cooperating to direct streams of liquid flowing through the disc along lines converging toward streams of liquid flowing through the adjacent slots.

CORNELIUS MORRISON.

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