Suck-back liquid dispensing valve and valve assembly
a liquid dispensing valve and valve assembly technology, applied in the direction of single-unit apparatus, functional valve types, transportation and packaging, etc., can solve the problems of unsightly excess liquid, difficult operation of dispensers, and often remaining liquid
Active Publication Date: 2017-06-29
DAB O MATIC HLDG
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
[0003]It is accordingly the desideratum of the invention to provide an improved suck-back valve for selectively dispensing a stored or other source of liquid and for advantageously and effectively drawing back through the valve dispensed liquid that remains on or about or proximate the dispensing opening of the valve when selectively activation of the valve is discontinued to return the valve to its closed or deactivated or sealing condition.
[0004]It is a further object of the invention to provide such suck-back functionality in a liquid dispensing valve that is highly effective using liquids of a wide range of viscosities and like characteristics.
[0005]The present invention provides an improved liquid dispensing valve and valve assembly for use with an associated liquid storage container or housing to form a liquid dispensing device or apparatus, and that is especially adept at operatively avoiding the continued presence of excess dispensed liquid at and about the exit orifice after the cessation of user-applied liquid dispensing-effecting force or other user-supplied mechanical effort or motion to the typically-flexible or resiliently flexible container.
Problems solved by technology
A common problem that arises in the use of such dispensers is that, as the dispenser is manipulated to open the valve—which is normally closed to prevent leakage when not in use—so as to release a desired amount of the stored liquid and to then cause or allow the valve to close, some amount of the released or dispensed liquid often remains on the surface areas of and about the dispensing opening of the valve.
The presence of this excess liquid is unsightly, unhealthy and can interfere with the ability of the valve to fully close and / or the functioning of the valve insofar as allowing selective user control of the dispensing operation.
Previous efforts to avoid this problem, as by attempting to cause such excess liquid to be “sucked back” into the dispenser as the valve closes, for example by increasing the force by which the valve closes (and correspondingly, that required to open the valve), have merely made such dispensers more difficult to operate without significantly alleviating this issue.
Method used
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Embodiment Construction
[0020]A currently-preferred form of the inventive valve and valve assembly is depicted in FIGS. 1 to 9, all of which show in cross section the various elements of the inventive valve and related parts and elements as well as combinations and assemblies thereof. As will be appreciated, these elements, parts and assemblies define a preferably overall circular or otherwise ovoid construction—i.e. when viewed perpendicular to the illustrated cross sections, e.g. from the top or distal end—although other shapes are within the intended scope and contemplation of the invention as general matters of design choice. It is generally intended that the valve and / or valve assembly will be secured for use to a container or housing, preferably a flexible container, that contains a liquid to be operatively dispensed through the valve. By squeezing or otherwise selectively applying inwardly-directed force or pressure to the flexible container, the inventive valve is operatively activated or opened an...
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A suck-back valve selectively actuatable for dispensing liquid in its open condition from an associated liquid storage container, and for avoiding continued presence of excess dispensed liquid about the exit orifice in the closed condition of the valve, is formed at least in part of a spring member and a pin. The spring member includes a distal web that defines a valve seat and a dispensed liquid exit orifice, a proximal web, and a plurality of flexibly elastic bands helically connecting the distal and proximal webs. The pin includes an elongated shaft having a proximal end secured to the proximal web and carrying a substantially hollow frustoconical cone at its distal end. The cone has an outer valving surface for releasable abutment with the valve seat and the shaft has a bore of predetermined cross-sectional extent defined longitudinally along and within the shaft to create a continuous fluid passageway through and along the pin. Dispensed liquid remaining proximate the exit orifice is sucked back into the liquid container through the shaft bore as the valve returns from its open to its closed condition under the return urgency of the elastic bands.
Description
FIELD OF THE INVENTION[0001]The present invention is directed to liquid dispensing valves, and most particular to such valves that advantageously function to draw back through the valve, into an associated liquid storage source from which liquid is operably dispensed by selective activation of the valve, liquid that remains on or about or proximate the dispensing opening of the valve when the valve is deactivated to seal closed the dispensing opening.BACKGROUND OF THE INVENTION[0002]The dispensing of stored liquids from, for example, small hand-held dispensers commonly activated by selective manual pressing or squeezing or manipulation of a flexible wall portion or feature or the like of the dispenser has become a ubiquitous way of making selective use of a wide variety of liquids of all viscosities, from extremely “thin” or water-like liquids such as scented toilet water to highly viscous liquids such as toothpaste. A common problem that arises in the use of such dispensers is that...
Claims
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IPC IPC(8): B05B11/00F16K15/02B05B11/04
CPCB05B11/0064F16K15/026B05B11/0072B05B11/047B05B1/28B65D47/2075B05B11/1097B65D47/2031
InventorBELL, JAMESBELL, SCOTT
OwnerDAB O MATIC HLDG