US3739955A

US3739955A - Reservoir dispenser

Info

Publication number: US3739955A
Application number: US00217216A
Authority: US
Inventors: K Gores
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-01-12
Filing date: 1972-01-12
Publication date: 1973-06-19
Anticipated expiration: 1990-06-19

Abstract

A cup forms an upper portion of a manually-operable pump associated with a container from which liquid is to be withdrawn in small amounts. A disc of substantial area is mounted in the lower portion of the cup in a fixed spaced relationship over an inlet opening and spaced from bottom and lower side wall portions of the cup. Liquid flowing through the inlet opening is first diverted radially outwardly by the disc, to flow through the space between the disc and the cup bottom, and is then diverted upwardly by the cup side wall to flow through the space between the periphery of the disc and adjacent side wall portions of the cup.

Description

United States Patent 1191 Gores June 19, 1973 RESERVOIR DISPENSER Kenneth W. Gores, 1026-112th NE, Bellevue, Wash. 98004 [22] Filed: Jan. 12, 1972 [21] Appl. No.: 217,216

[76] Inventor:

abandoned [52] U.S. Cl. 222/385 [51] Int. Cl B6711 5/42 [58] Field of Search 222/321, 518, 580,

l. s it...

1,850,870 3/1932 Featherstone 222/205 2,000,493 5/1935 Miller 222/205 3,456,650 7/1969 Schwartzman 222/205 X Primary Examiner-Samuel F. Coleman Assistant Examiner-Norman L. Stack, Jr. Attorney-Ford E. Smith [57] ABSTRACT A cup forms an upper portion of a manually-operable pump associated with a container from which liquid is to be withdrawn in small amounts. A disc of substantial area is mounted in the lower portion of the cup in a fixed spaced relationship over an inlet opening and spaced from bottom and lower side wall portions of the cup. Liquid flowing through the inlet opening is first cliverted radially outwardly by the disc, to flow through the space between the disc and the cup bottom, and is then diverted upwardly by the cup side wall to flow through the space between the periphery of the disc and adjacent side wall portions 01 the cup.

2 Claims, 4 Drawing Figures RESERVOIR DISPENSER CROSS REFERENCE TO RELATED APPLICATION This is a continuation of my co-pending application Ser. No. 9,235, filed Feb. 6, 1970, now abandoned and entitled RESERVOIR DISPENSER.

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a reservoir type dispenser and in particular to provision of such a dispenser with a member which both serves as a pressure receptor for cotton applicators or the like and a diffuser baffle.

2. Description of the Prior Art Doctors, dentists, nurses, professional assistants,

mothers, and others, often have need to one-handedly withdraw a small amount of liquid from a container to wet a swab or the like. Dispensers are known which include a cup on top of a container in which a swab is placed by the user. The cup is often an upper portion of a pump mechanism which serves to force liquid upwardly from the container into the cup by a downward pressure on the cup bottom. A known dispenser of this type is disclosed by U. S. Pat. No. 2,593,591, granted on Apr. 22, 1952, to Benjamin David Menkin and Frank M. Darling.

These known dispensers have one or more relatively small area openings in the bottom of the cup forming fluid passageway means from the pump into the cup. One disadvantage of this type of inlet passageway for the cup is that the liquid is moved through the openings in the form of relatively high energy jets or spurts or pulsating streams, sometimes resulting in the liquid being expelled forceably upward from the confines of the cup. Another disadvantage of the small orifice type inlet is that it is possible for cotton swabs to enter into and occlude the inlet openings.

SUMMARY OF THE INVENTION The primary object of this invention is to provide a reservoir type dispenser which has neither the spurting nor clogging problem. According to the invention, a disc member is supported in the bottom of the cup. It serves as the pressure receptor for the swab. The disc completely covers the inlet passageway so that the swab material cannot enter into and occlude such passageway. The disc functions without impeding the flow of liquid into the cup, which flow occurs in the annular regions between the peripheryof the disc member and side wall portions of the cup. The disc also cooperates with the bottom and side wall portions of the cup to form a diffuser passageway means through which liquid will flood into the cup rather than enter as a stream.

In a preferred form, the disc is provided with a stem which is press fitted into and thus anchored in a single inlet passageway. A plurality of spaced apart radial ribs are formed between the floor of thecup and the under side of the disc to function as vertical spacers between the disc and the cup bottom and to define flaring passages for the liquid.

DESCRIPTION OF THE DRAWINGS FIG. 1 is a sketch in elevation of the reservoir dispenser as used;

FIG. 2 is a vertical sectional view in perspective of the dispenser;

FIG. 3 is a vertical sectional view of the dispensing cup; and

FIG. 45 is a cross-section on line 4-4 of FIG. 3.

DESCRIPTION OF THE INVENTION:

The dispenser comprises the container 10 having an internal pump device 12 forming part of closure cap 14 for the container 10. Dispensing reservoir or cup 16 is mounted atop stem of pump 12. Normally container 10 is formed of glass or plastic and has a neck 20 to which cap M is readily secured.

Pump barrel 22 is secured to cap 14 by flanged re tainer 2% which, in turn, is fastened to cap 14 by ring member 26. At its lower end, barrel 22 has an inlet 28 immersed in fluid in the container. Seat 30 closed by ball 32 is located in barrel 22 above inlet 28.

On the lower end of stem 18 is a cup-shaped piston 34 at the lower terminus of passage 36 in stem 18. The upper end of passage 36 is necked and shaped to provide seat 38 on which rests check b all40 in liquid holding chamber 42 in the upper part of hollow stem 18.

Cup 16 has a depending nipple stem 44 including small passage 46 and larger but nevertheless reduced inlet passageway.

Diffuser disc 50 in cup 16 has area dimension substantially greater than the reduced diameter inlet passageway 48. Disc-mounting means support disc 50 in a fixed position close to the bottom of cup 50 and over the upper end of the inlet passageway 48 with its periphery and under side in spaced relation to side wall and bottom portions respectively of said cup 50 to form diffuser passageway means through which the liquid forceably pressed upward by pump 12 will flood into said cup rather than enter as a strong stream. Disc 50 has an upper surface of substantial area to be contacted as shown in FIG. 1 by an absorbent swab introduced into cup 16 for wetting. Such swab upon being forced downwardly on disc 50 functions to depress cup 16 for operating pump 12.

The disc-mounting means supporting it in fixed relation includes a plurality of spaced apart radial ribs 54 functioning as vertical spacers between the disc underside and the cup bottom. Ribs 54 divide the space between said disc and said cup bottom into flaring passageways leading from the upper end of inlet passageway 48 outwardly to the space between the cup side wall and the periphery of disc 50. It is believed the flaring passageways permit a liquid pressure relief aid in insuring that the liquid floods or flows slowly into cup In. The disc'mounting means may also include a stem 56 depending from disc 50 into the inlet passageway 48. Stem 56 is shown as having an enlarged section 58 lodged in inlet passageway 48 for retaining the disc in place. Stem 56 is dimensioned and shaped to leave space or spaces in the inlet passageway 48 sufficient for upward movement therepast of liquid through said passageway. As shown stem 56 and its enlarged section 58 is thinner than the diameter of passageway 48 with the enlarged section 58 being so broad as to be press fitted across passageway 48.

When pressure is applied to disc 50 in cup 16 by a user, one-handedly, as by the instrumentaiity of an absorbent swab 60, the cup and pump stem 18 are depressed. Assuming the pump to be dry, no liquid will flow on the down stroke. Release of pressure permits spring 62, previously compressed, to expand and force the piston upward. A vacuum is created tending to draw liquid upward past ball 32 which is dislodged from seat 30 as the flow continues. On the next down stroke, the fluid in pump chamber 64 above ball 32 is forced upward in passage 36, past ball 40 into chamber 42 and, if the volume is sufficient, into cup 16. It may be initially required that more than one or two strokes are required to flood cup 16 and

fill chambers

42 and 64. As the liquid flows upward in passage 46 and passageway 48, it encounters diffuser disc 50 under which and around the periphery of which it floods into cup 16. In this way, spurting or jetting is avoided and since only a small amount of liquid is ordinarily needed to wet swab, the latter will be suitably wetted.

The liquid trapped in chamber 42 is immediately subjacent the cup. If not enough liquid is available in the cup, all the user need do is apply a slight amount more of downward pressure.

It will be observed that disc 50 in cup 16 serves as both a pressure receptor and liquid diffuser baffle. lt permits one handed operation for users who often have the other hand occupied and unavailable to hold the container while the cup is depressed. This reservoir dispenser also permits the use of the sterile swab or absorbent applicator to operate the pump and eliminates the necessity for a persons hand to come in contact with the cup at all, which is desirable when caustic or staining liquid compounds are being dispensed. Note further that the use of the swab to depress the cup is without clogging or occlusion of the inlet passageway 48, that would otherwise impede liquid flow into the cup 16 and most importantly spurting or jetting is avoided thus eliminating undesirable wetting in the environs of said reservoir dispenser.

It will be understood that the foregoing description sets forth fully, clearly, concisely and exactly a preferred form of the invention. To those skilled in the art, alternatives and substitutions will occur. All such as by a liberal application of the doctrine of equivalents as fall within the scope of the subjoined claims is intended to be covered by this patent.

What is claimed is:

1. A reservoir dispenser comprising a liquid container having a manually-operable, verticallyreciprocal pump thereon including a reservoir-forming cup which is depressible to operate said pump, said cup including a bottom, an upright side wall, and an open upper end located substantially above said bottom, and a reduced diameter inlet passageway from said pump enters the cup through said bottom; and the improvement, comprising:

an imperforate disc in the cup having area dimension substantially greater than the reduced diameter inlet passageway; and disc-mounting means supporting said disc in a fixed position close to the bottom of said cup and over the upper end of the inlet passageway with its periphery and under side in spaced relation to side wall and bottom portions respectively of said cup to form diffuser passageway means through which the liquid will flood into said cup rather than enter as a stream, said disc having an upper surface of substantial area to be contacted by absorbent swab placed into the cup for wetting said swab upon being forced downwardly on said disc functioning to depress said cup for operating said pump; said disc-mounting means including a stern depending from the underside of said disc into said reduced diameter passageway, said stem being dimensioned to incompletely block said reduced diameter passageway and having means outstanding therefrom to span between opposite walls of said reduced diameter passageway lodging said stem therein against longitudinal movement.

2. The reservoir dispenser of claim 1 in which said disc-mounting means includes a plurality of spaced apart radial ribs functioning as vertical spacers between the disc and the cup bottom, and dividing the space between said disc and said cup bottom into flaring passageways leading from the inlet passageway outwardly to the space between the cup side wall and the periphery of the disc.

Claims

1. A reservoir dispenser comprising a liquid container having a manually-operable, vertically-reciprocal pump thereon including a reservoir-forming cup which is depressible to operate said pump, said cup including a bottom, an upright side wall, and an open upper end located substantially above said bottom, and a reduced diameter inlet passageway from said pump enters the cup through said bottom; and the improvement, comprising: an imperforate disc in the cup having area dimension substantially greater than the reduced diameter inlet passageway; and disc-mounting means supporting said disc in a fixed position close to the bottom of said cup and over the upper end of the inlet passageway with its periphery and under side in spaced relation to side wall and bottom portions respectively of said cup to form diffuser passageway means through which the liquid will flood into said cup rather than enter as a stream, said disc having an upper surface of substantial area to be contacted by absorbent swab placed into the cup for wetting said swab upon being forced downwardly on said disc functioning to depress said cup for operating said pump; said disc-mounting means including a stem depending from the underside of said disc into said reduced diameter passageway, said stem being dimensioned to incompletely block said reduced diameter passageway and having means outstanding therefrom to span between opposite walls of said reduced diameter passageway lodging said stem therein against longitudinal movement.