US1713937A - Medicine dropper - Google Patents

Description

May 21,1929 c. ca. WHEELAND MEDICINE DROPPER Filed April 16, 1928 INVENTOR, 6 1/4; Es 6. WHEEL/4N0 ATTORNEYS.

Patented May 21, .1929.

CHARLES G. WI-IEELAITD, OF SAN FRANCISCO, CALIFORNIA.

MEDICINE DBOPPER.

Application filed April 16,

'The present invention relates to improve ments in medicine droppers, and it con sists in the combinations, constructions, and arrangements hereinafter described and claimed.

An object of my invention is to provide a medicine dropper that has means for preventing fluid sucked up into the tube from being drawn into the rubber bulb. This gives a longer life to the bulb, because it is not subjected to the action of the medicinal fluid.

A further object of my invention is to provide a device of the type described which is extremely simple in construction and which will not atlect the normal operation of the device.

Other objects and advantages will appear in the following specification, and the novel features of the device will be particularly pointed outin the appended claims.

My invention is illustrated in the accompanying drawing forming a part of this application, in which Figure 1 is a vertical section through the device showing the bulb partially deflated and the fluid drawn up into the tube, and

Figure 2 shows how the fluid is prevented from entering the bulb.

in carrying out my lllv'OlltlOlL. I provide a tube 1 which may be made of any material desired. This tube is provided with a reduced outlet end 2 and a conical-shaped up per end 3. The openings 4 and 5 at each end of the tube are made small enough to prevent the passage of a floating stopper 6. This stopper may be made of corl: or any other material that will be buoyant enough to float upon a liquid.

The tube has a shoulder T for receiving the open end of a rubber bulb 8.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

The device operates in the usual manner, that is, when the bulb 8 is depressed and the Serial No. 270,551.

end 2 inserted in a liquid, a releasing of the bulb will create sufficient suction to draw a liquid 9 up into the tube 1. A pressing of the bulb 8 to collapse it will expel the fluid from the tube.

When the tube is empty, the member 6 will be disposed at the bottom and will close the opening 4-.

When the bulb 8 is depressed and then released for sucking a fluid up into the tube 1, the member 6 will float upon the top of the fluid as shown in Figure 1. lVhen the tube is entirely tilled, the float will be forced into the conical-shaped end 3 and will close the opening :trom enter This will prevent the fluid ing the bulb 8. A pressure upon the bulb to expel the fluid from the tube will i'crce the member 6 down into the tube and at the same time will expel the fluid from the tube. As thefluid is expelledtrom the tube, the member 6 will float upon the surface until it reaches the reduced end 2. In this way practically the entire contents of the tube may be expelled and only a drop or tw will remain in member 6.

the reduced end and below the Although I have shown and described one embodiment of my invention, it is to be un derstood that the same is susceptible of various changes, and I reserve the right to employ such changes as may come within the scope of the appended claims.

I claim bulb.

2. A medicine dropper comprising a tube having reduced ends, a movable stopper disposed in said tube for closing either end, and a collapsible bulb covering one end of the tube.

CHARLES G. WHEELAND.

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