US2105957A - Liquid dispensing device - Google Patents

Description

Jan. 18, 1938. A. N. sEvERsoN LIQUID DISPENSI-NG DEVICE Filed March 24, 1937 Zn'rnfol" Arh u r NJel/enron ff%/ Atornecyw Patented Jan. 18, 1938 UNITED s'rarss ATENT QFFICE LIQUIDY DISPENSING DEVICE Arthur N. Severson, Milwaukee, Wis.

Application March 24,

5 Claims.

This invention appertains to liquid dispensing devices, and more particularly to means for forcing liquids under pressure from a bottle when needed, such as from laboratory wash flasks.

In laboratory work the liquid is generally forced from the flask by blowing into the same througha mouth-piece or tube, and when suicient pressure is reached the liquid is expelled through a delivery nozzle. Many difficulties are inherent with a flask of this type. The mouthpiece is unsanitary and is liable to collect poisons from the laboratory, and the flask cannot be conveniently used in confined spaces.

It is, therefore, one of the salient objects of my invention to provide means for manually creating and holding a pressure in the flask,

which will not only permit the expeditious delivery of the liquid, but which will not interfere with the free manipulation of the flask itself.

Another important object of my invention is the provision of a flask or bottle having an elongated neck with a compressible bulb fitted around the neck, having means permitting the intake of air and the expelling of air into the flask, the neck of the flask carrying a sealing stopper and a delivery tube extending to the bottom of the flask, with an outlet nozzle arranged exteriorly of the ilask.

A further important object of my invention is the provision of means associated with the stopper for permitting the bleeding of air from the flask when it is desired to stop the delivery of the liquid from the flask.

A still further object of my invention is to provide a laboratory wash ask of the above character, which will be durable 'and efficient in use, one that will be simple and easy to manufacture, and one which can be placed upon the market at a reasonable cost.

With these and other objects in view, the invention consists in the novel construction, arrangement, and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated in the accompanying drawing, in which drawing:

The figure is acentral longitudinal section through a laboratory flask embodying the principles of my invention.

Referring to the drawing in detail, the numeral I0 indicates a bottle or flask having the body portion thereof provided with an elongated neck Ill. The neck is normally closed and sealed by a rubber stopper 'I, and this stopper has fitted therein a relief tube I. Formed on the relief tube I are radially extending knobs 2, which are iltted 1937, Serial No. 132,777

in the elastic stopper. This construction allows the turning of the relief tube by hand, for a purpose which will be later set forth, and to insure the automatic returning of the tube to its normal position when the tube is released.

The stopper I also carries a glass tube 3, which extends through the neck and into the body portion of the bottle or flask. As illustrated, the tube terminates in close relation to the bottom wall of the flask and is bent at an angle so that when the ask is tipped in one direction the lower end of the tube will still be immersed in any liquid left in the bottle. The upper end of the tube 3 is bent downwardly at an angle, as atY 3', and is connected by a piece of flexible tubingl 4 with a glass outlet nozzle 5. 'Ihe outer end of the nozzle 5 is tapered, as at 6, so that liquid dispensed from the nozzle will be in the form of a fine spray.

Around the neck I0 is placed a compressible bulb 8, and this bulb is preferably provided with an inner sleeve 8', which closely embraces the neck of the bottle. The sleeve 8' is connected with the opposite ends of the bulb, and thus an air chamber is formed around the sleeve 8'. The bulb is provided with an air inlet valve 9 and an air outlet valve I I. These valves can be of any preferred character, and it is to be noted that the valve I I is in the nature of a rubber nipple, which extends through an opening in the neck IIJ', so that when the bulb is compressed air will be forced into the bottle. y

In use of my flask the bulb 8 isV compressed by the hand, and the air contained in the bulb will be forced into the flask. Upon release of the bulb air will be taken into the bulb through the valve 9, and consequently when pressure is again placed on the bulb additional air will be forced into the flask. When a suiiicient pressure is reached, the liquid will be forced out of the flask through the tube 3 and the nozzle 5.

To permit the quick release of pressure from the flask when it is desired to stop the flow of liquid through the nozzle, the tube I can be brought into play. This tube I, at a point intermediate its ends, is provided with an air inlet port I2, and this port is adapted to be brought into communication with a longitudinally extending channel I3 formed in the stopper 'I. Thischannel I3 communicates with the interior of the bottle or flask. Normally, the opening I2 is at one side of the channel I3, and when it is desired to relieve pressure the tube is rotated so as to bring the opening I2 into communication with the channel. Upon release of the tube the same will be brought back to its normal cut-01T position by the inherent resiliency of the stopper 'I acting upon the knobs 2.

While I have shown my invention applied to a flask or bottle, it is to be understood that the same can be incorporated with various types of receptacles. Y

Changes in details may be made Without departing froml the spirit or the scope of my invention, but what I claim as new is:

l. A device for dispensing liquids comprising, a receptacle having an elongated neck, a stopper sealing the neck, a delivery tube extending through and carried by the stopper, said tube terminating adjacent to the lower end of the re ceptacle, and a bulb closely embracing the e1on-v gated neck and having communication therewith for forcing of air under pressure into the recep tacle.

2. A device for dispensing liquids comprising, a receptacle having an elongated neck, a stopper normally sealing the neck, a dispensing tube carried by and extending through the stopper into the receptacle, an outlet nozzle carried by the tube, a resilient bulb closelyembracing the elongated neck having an air inlet valve communicating with the atmosphere, and an air outlet valve vcommunicating with thereceptacle.

3. A device for dispensing liquids comprising,

Ya receptacle having an elongated neck, a stopper municating with the receptacle, and means for quickly releasing pressure in the receptacle.

4. A laboratory wash flask comprising, a body, an elongated neck on said body having an opening therein, a stopper sealing the neck, a delivery tube carried by and extending through the stopper into the body, an outlet nozzle carried by the outer end of the tube, a resilientl bulb surrounding the neck having an inner sleeve closely embracing the neck and connected with the opposite ends of the bulb, said bulb having an air inlet valve communicating with the atmosphere, an air outlet valve on the bulb communicating with the opening in the neck.

5. A laboratory wash flask comprising, a body, an elongated neck on said body having an opening therein, a stopper sealing the neck, a delivery tube carried by and extending through the stopper into the body, an outlet nozzle carried by the outer end of the tube, a resilient bulb surrounding the neck having an inner sleeve closely embracing the neck and connected with the opposite ends of the bulb, said bulb having an air inlet valve'communicating with the atmosphere, `an air outlet valve on the bulb communicating with the opening in the neck, said stopper hav- `ing a yWay communicating with the neck, a tube having a. closed inner end carried by the stopper, means anchoring the last named tube to the stopper, said last named tube having an air inlet opening normally disposed out of communication with the channel, said opening being adapted to be brought into communication With the channel upon turning movement of said last named tube.V

` ARTHUR N. SEVERSON.

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