The increase in bacterial immunity to modem antibiotics is problematic and one of the chief vectors of infection is the human hand. Hence, when not in the proximity of a washroom to disinfect one's hands, it would be useful to have a means to accomplish such sanitation. Also, in the midst of daily activities, it can be inconvenient to uncap bottles of disinfecting gels or hand lotions to otherwise treat the hands.
Fortunately, it has been established that ethyl alcohol is a most effective antiseptic for gram-negative pathogens; it is of low viscosity, easily dispensed from a portable container, and does not require the use of a material wipe or cloth because of the speed of evaporation. Further, an adequate dose for sanitizing the hands comprises but a few drops of this antiseptic. To prevent chafing, glycerin can be added to the alcohol without levels of viscosity increase that would be deleterious to the dispensing process.
Various methods of portable disinfectant or lotion dispensers have been disclosed in the prior art. These include body-mounted dispensers, wrist bracelet dispensers, and others. U.S. Pat. No. 6,371,946 discloses a dispensing tube that drips liquid onto the hand. U.S. Pat. No. 6,053,898 discloses a tube-fed finger dispenser. A body-worn dispenser of form factor similar to a pager is disclosed in U.S. Pat. No. 5,927,548.
What has not been demonstrated is a dispenser that is wrist- or arm-worn that provides ease of actuation and, more specifically, single hand actuation. Neither has there been a device that can be surreptitiously actuated. This is an important consideration with respect to public relations. Individuals such as business and sales personnel may come in contact with and greet many people during the day. It would be desirable to have the option of sanitizing the hands after a handshake with a person without conveying a disdainful message to that person in so doing.
A wrist-mounted dispenser that achieves dispensing directly to the hand with a simple hand action is a major advantage of the present invention. This is especially useful to nurses and doctors in busy hospital settings, as well as for allied health care workers who cannot take time to repeatedly wash their hands with soap and water.
The present invention discloses wrist- or forearm-mounted device versions for dispensing a small amount of alcohol-based disinfectant hand rub, moisturizer, or other skin medicament. Even powder-based skin treatments can be dispensed using the present invention. A wristband or other attachment means removeably affix the device to arm or wrist. Various locations are feasible including the top, side, or underside of the wrist or forearm. In a preferred embodiment, the device is in the form of a low profile, wrist-mounted dispenser with a slit-based diaphragm valve that produces a small amount of dispensed skin treatment when actuated.
Surreptitious actuation and dispensing of hand treatments is made possible with embodiments of the invention that are mounted on the underside of the wrist and can be easily actuated in a causal, not easily detected manner.
Because only a few drops of alcohol-based disinfectant comprise a dose adequate to achieve sanitation of the hands, the device can dispense hundreds of doses of disinfectant before requiring refill or disposal. It can be used at any orientation of the arm and will avoid leakage when not actuated. Options exist for the fabrication of the device whether disposable or refillable. For example, hard or soft pliable plastics can be employed. For disposable versions of the device, biodegradable plastics are cited as advantageous device construction materials.
Objects and Advantages
Several objects and advantages of the present invention are:
(a) Provide a convenient, portable means for dispensing skin treatments;
(b) Provide a cost-effective means for dispensing skin treatments;
(c) Provide an unobtrusive means of dispensing skin treatments;
(d) Provide an easily actuated means of dispensing skin treatments:
(e) Provide an arm- or wrist-mounted means of dispensing skin treatments;
(f) Provide a wrist-mounted disposable means of dispensing skin treatments;
(g) Provide a disposable wrist-worn skin treatment dispenser.
(h) Provide an easy-to-manufacture skin treatment dispenser using a diaphragm valve.
a is a pictorial and side view diagram of a single slit diaphragm valve.
b is a pictorial diagram of a diaphragm valve having cross slits.
c is a pictorial diagram of a tricuspid-type diaphragm valve.
The following definitions serve to clarify the disclosed and claimed invention:
Bladder refers to an elastic, resilient container that can be deformed under compression.
Skin treatment material comprises any of a host of liquid, powder, gel, or aerosol medications, or sanitizing agents that are topically applied to the hands or other skin surfaces. Examples include alcohol, glycerin, moisturizing lotions, sunscreen, and desiccating powders. The combination of treatments such as disinfecting lotion and sunscreen are included in this definition.
Working fluid refers to the fluid which transfers manual pressure to the material to be dispensed. Such transfer of pressure can occur in one or multiple stages and typical working fluids include air contained in a squeeze bottle as well as liquid versions of the hand treatment material itself.
Diaphragm valve refers to a diaphragm having one or more slits that form flaps in the diaphragm. These flaps are normally closed but can be caused to open upon fluid or gas pressure applied to one side of the diaphragm. In this way, the diaphragm valve mimics the operation of human heart valves such as the tricuspid valve.
The present invention is useful for dispensing either hand treatments such as moisturizers or disinfectants; even powders can be dispensed in powder-aerosol form. Typically, the active ingredient in hand antiseptics such as Purel is ethyl alcohol. This is fortuitous because it is a relatively non-toxic liquid that exhibits low viscosity over the temperature range of interest for this application. This makes delivery of a directed stream of fluid relatively easy. In contrast to liquid, alcohol gels are useful in that they do not run and although they will require more force to dispense than liquid, such higher viscosity disinfectant or moisturizing formulations can be accommodated in differing embodiments of the present invention. Various means of dispensing the aforementioned hand treatments are feasible and can be tailored to the type of material to be dispensed. The target locations for deposition of the hand treatment include the regions on the top of the hand, and the underside of the hand, either fingers or palm. The preferred embodiment for a means of dispensing hand cleaning dosages in a device that attaches to either the top or underside of the wrist. It can be worn unobtrusively underneath a long-sleeved shirt.
a through 1c depict the basic geometry of self-sealing diaphragm valves. In
A first version of the slit-based diaphragm valve type dispenser is shown in
Depending upon the compounding of the specific treatment fluid to be dispensed by the present invention, various biodegradable plastics can be employed in disposable embodiments of the invention. The table below provides examples of various categories of candidate biodegradable plastics.
While there have been shown and described the preferred embodiments of the present invention, it is to be understood that the invention can be embodied otherwise than is herein specifically illustrated and described and that, within such embodiments certain changes in the detail and configuration of this invention, and in the form and arrangements of the components of this invention, can be made without departing from the underlying idea or principles of this invention within the scope of the appended claims.
This application is a division of application Ser. No. 10/915,720 filed Aug. 10, 2004 which is a continuation-in-part of application Ser. No. 10/729,757, filed Dec. 5, 2003 which is a continuation-in-part of application Ser. No. 10/314,825, filed Dec. 9, 2002, now abandoned. This application claims the benefit of U. S. Provisional Application Nos. 60/515,718, 60/515,775, 60/515,793, and 60/515,794 filed Oct. 30, 2003, Disclosure Document No. 525,532, filed Feb. 5, 2003, Disclosure Document No. 534,422, filed Jul. 7, 2003, and Disclosure Document No. 536,414, filed Aug. 8, 2003.
Number | Date | Country | |
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Parent | 10915720 | Aug 2004 | US |
Child | 11983202 | Nov 2007 | US |
Number | Date | Country | |
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Parent | 10729757 | Dec 2003 | US |
Child | 10915720 | Aug 2004 | US |
Parent | 10314825 | Dec 2002 | US |
Child | 10729757 | Dec 2003 | US |