U.S. patent application number 11/749145 was filed with the patent office on 2008-01-31 for aerosol formulation suitable for automated periodic spraying.
Invention is credited to Simon Sassoon.
Application Number | 20080023505 11/749145 |
Document ID | / |
Family ID | 38748606 |
Filed Date | 2008-01-31 |
United States Patent
Application |
20080023505 |
Kind Code |
A1 |
Sassoon; Simon |
January 31, 2008 |
AEROSOL FORMULATION SUITABLE FOR AUTOMATED PERIODIC SPRAYING
Abstract
A device for spraying an aerosol mist onto a door handle of a
door includes a housing mountable to the door, a seat for receiving
an aerosol canister having a valve oriented toward the door handle,
and a timing circuit operative to dispense the aerosol mist in an
automated manner onto the door handle. The aerosol canister for use
in the device contains a solution which is engineered so as to not
leave a residue after evaporation of the aerosol mist. The device
thus sprays the solution from the housing onto the door handle and
evaporates from the door handle free of any residue.
Inventors: |
Sassoon; Simon; (New York,
NY) |
Correspondence
Address: |
DARBY & DARBY P.C.
P.O. BOX 770
Church Street Station
New York
NY
10008-0770
US
|
Family ID: |
38748606 |
Appl. No.: |
11/749145 |
Filed: |
May 15, 2007 |
Related U.S. Patent Documents
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
|
|
11476465 |
Jun 27, 2006 |
|
|
|
11749145 |
May 15, 2007 |
|
|
|
PCT/US06/00841 |
Jan 9, 2006 |
|
|
|
11476465 |
Jun 27, 2006 |
|
|
|
11104292 |
Apr 11, 2005 |
|
|
|
PCT/US06/00841 |
Jan 9, 2006 |
|
|
|
60642792 |
Jan 10, 2005 |
|
|
|
Current U.S.
Class: |
222/645 |
Current CPC
Class: |
A61L 2/18 20130101; A61L
2/22 20130101; G04C 23/44 20130101; B65D 83/262 20130101; B65D
83/267 20130101; B65D 83/7575 20130101; A61L 2/20 20130101; B65D
83/26 20130101; A61L 2/24 20130101; B65D 83/384 20130101; E05B
1/0069 20130101 |
Class at
Publication: |
222/645 |
International
Class: |
B05B 17/00 20060101
B05B017/00 |
Claims
1. A device for spraying an aerosol mist onto a door handle of a
door, comprising: a housing mountable to the door; a seat for
receiving an aerosol canister having a valve oriented toward the
door handle, the aerosol canister containing a solution which
comprises water, hydrogen peroxide, and ethanol and is free of any
alkylene glycol; and a timing circuit operative to dispense the
aerosol mist in an automated manner onto the door handle, whereby
the solution is sprayed from the housing as the aerosol mist on the
door handle and evaporates from the door handle free of any
residue.
2. The device according to claim 1, wherein the solution comprises
approximately 2 to approximately 72 percent water by weight.
3. The device according to claim 1, wherein the solution comprises
approximately 0.0226 to approximately 25 percent hydrogen peroxide
by weight.
4. The device according to claim 1, wherein the solution comprises
approximately 1 to approximately 85 percent ethanol by weight.
5. The device according to claim 1, wherein the solution comprises
approximately 65 to approximately 75 percent ethanol by weight.
6. A device for spraying an aerosol mist onto a door handle of a
door, comprising: a housing mountable to the door; a seat for
receiving an aerosol canister having a valve oriented toward the
door handle, the aerosol canister containing a disinfectant
formulation free of any alkylene glycol which comprises:
approximately 0.1 percent by weight morpholine; approximately 0.1
to approximately 0.2 percent by weight alkyl dimethyl ethylbenzyl
ammonium chloride; approximately 0.1 to approximately 0.2 percent
by weight alkyl dimethyl benzyl ammonium chloride; approximately 1
percent by weight ammonium hydroxide solution; approximately 9.5 to
approximately 15.7 percent by weight water; approximately 30
percent by weight isobutane; approximately 53 percent by weight
isopropanol, wherein each percentage is based on a total of 100
percent by weight; and a timing circuit operative to dispense the
disinfectant in an automated manner onto the door handle, whereby
the solution is sprayed from the housing as the aerosol mist on the
door handle and evaporates from the door handle free of any
residue.
7. The device according to claim 6, wherein the formulation is free
of any ethylene glycol, diethylene glycol and triethylene
glycol.
8. The device according to claim 6, wherein the formulation is free
of any triethylene glycol.
9. A device for spraying an aerosol mist onto a door handle of a
door comprising: a housing mountable to the door; a seat for
receiving an aerosol canister having a valve oriented toward the
door handle, the aerosol canister containing the disinfectant which
comprises: approximately 0.1 percent by weight morpholine;
approximately 0.1 to approximately 0.2 percent by weight alkyl
dimethyl ethylbenzyl ammonium chloride; approximately 0.1 to
approximately 0.2 percent by weight alkyl dimethyl benzyl ammonium
chloride; approximately 1 percent by weight ammonium hydroxide
solution; approximately 9.5 to approximately 15.7 percent by weight
water; approximately 30 percent by weight isobutane; approximately
53 percent by weight isopropanol, wherein each percentage is based
on a total of 100 percent by weight; and an amount of triethylene
glycol which is insufficient to leave a residue after evaporation
of the aerosol mist; and a timing circuit operative to dispense the
aerosol mist in an automated manner onto the door handle for
evaporation therefrom.
Description
[0001] This application claims the benefit of priority under 35
U.S.C. .sctn. 120 as a continuation-in-part of application Ser. No.
11/476,465, filed Jun. 27, 2006, entitled "Controllable Door Handle
Sanitizer system and Method," which is a continuation-in-part of
PCT Application Serial No. PCT/US2006/00841, filed Jan. 9, 2006,
entitled "Door Handle Sanitizer System And Valve Attachment
Apparatus," which is a continuation-in-part of U.S. application
Ser. No. 11/104,292, filed Apr. 11, 2005, entitled "Door Handle
Sanitizer System and Apparatus," which in turn claims priority
under 35 U.S.C. .sctn. 119(e) of U.S. Provisional Application Ser.
No. 60/642,792, filed Jan. 10, 2005, entitled "Door Handle
Sanitizer System and Apparatus." The entire disclosures of each of
the aforementioned priority applications are hereby incorporated by
reference.
FIELD OF THE INVENTION
[0002] The present invention relates to automated periodic spraying
devices that deliver aerosol mists to non-porous surfaces for
cleaning, sanitizing or disinfecting such surfaces, and more
particularly concerns automated systems that are adapted for
periodic spraying without human intervention.
BACKGROUND OF THE INVENTION
[0003] Door handles are among the most commonly used communal
devices in our daily lives. Maintaining a clean or sanitary door
handle is an ongoing challenge to the janitorial and sanitation
industry.
[0004] Automated devices for sanitation are highly desirable,
especially for heavy use door handles such as those in public
restrooms. A healthy hand-washing is rendered moot once the door
handle is used by even a single unwashed hand.
[0005] Traditional cleaning, sanitizing and disinfecting solutions
are available for treating communal devices such as door knobs and
push plates, but they are not well adapted for automated spray
systems. In conventional janitorial service, the chemicals in these
solutions are wiped from the surface. However, the inventor has
discovered that periodic spraying to the same surface in an
automated manner results in a sticky residue which builds up on the
surface. Once sticky residue buildup occurs, the sanitary and/or
disinfectant status of the door is compromised. This requires
additional cleaning and attention from janitorial staff and
detracts from the benefit and usefulness of the automated
device.
[0006] Furthermore, the tactile nature of the build-up can cause
discomfort in those who touch the surface, and can impart a sense
that the handle is, in fact, unsanitary.
[0007] The present invention overcomes these limitations by
providing an automated system which dispenses as an aerosol mist
solutions that have been engineered to overcome the deficiencies of
conventional cleaner, sanitizer and disinfectant solutions. Further
benefits result when the aerosol mist comprises environmentally
friendly compositions, as in a preferred mode of the present
invention.
SUMMARY OF THE INVENTION
[0008] In accordance with one aspect of the invention, a device for
spraying an aerosol mist onto a door handle of a door is described.
The device comprises a housing mountable to the door, a seat for
receiving an aerosol canister having a valve oriented toward the
door handle, the aerosol canister containing a solution for
cleaning, sanitizing or disinfecting the surface, which is
engineered so as to not leave a residue after evaporation of the
aerosol mist. The device further comprises a timing circuit
operative to dispense the aerosol mist in an automated manner onto
the door handle, whereby the solution is sprayed from the housing
as the aerosol mist on the door handle and evaporates from the door
handle free of any residue.
[0009] In accordance with another aspect of the invention, a device
for spraying an aerosol mist onto a door handle of a door is
described. The device comprises a housing mountable to the door, a
seat for receiving an aerosol canister having a valve oriented
toward the door handle, the aerosol canister containing a solution
for cleaning, sanitizing or disinfecting the surface, which is
engineered so as to not leave a residue after evaporation of the
aerosol mist, comprising hydrogen peroxide, water and ethanol, and
is free of any component that creates a residue. The device further
comprises a timing circuit operative to dispense the aerosol mist
in an automated manner onto the door handle, whereby the solution
is sprayed from the housing as the aerosol mist on the door handle
and evaporates from the door handle free of any residue.
[0010] In accordance with yet another aspect of the invention, a
device for spraying an aerosol mist onto a door handle of a door is
described. The device comprises a housing mountable to the door, a
seat for receiving an aerosol canister having a valve oriented
toward the door handle, the aerosol canister containing a solution
for cleaning, sanitizing or disinfecting the surface, which is
engineered so as to not leave a residue after evaporation of the
aerosol mist, comprising a quaternary ammonium salt disinfectant,
and is free of any component that creates a residue. The device
further comprises a timing circuit operative to dispense the
aerosol mist in an automated manner onto the door handle, whereby
the solution is sprayed from the housing as the aerosol mist on the
door handle and evaporates from the door handle free of any
residue.
[0011] These and other aspects, features and advantages of the
invention are described in connection with certain embodiments and
the accompanying drawing figures.
DESCRIPTION OF THE DRAWING FIGURES
[0012] The present invention is illustrated by way of example and
not by way of limitation in the figures of the accompanying
drawings in which like references indicate similar elements.
[0013] FIG. 1 is a perspective view a door handle treatment device
according to a first embodiment of the present invention mounted on
a door above the door handle;
[0014] FIG. 2 is a perspective exploded view of the door handle
treatment device of FIG. 1;
[0015] FIG. 3 is an enlarged view of an aerosol source and spray
actuator of the treatment device of FIG. 1;
[0016] FIG. 4 is a front elevation view of the door handle
treatment device of FIGS. 1-2 absent the outer cover to show
interior components;
[0017] FIG. 5 is a partial enlarged elevation view of a door handle
treatment device absent the outer cover to show interior
components;
[0018] FIG. 6 is a partial enlarged elevation view a door handle
treatment device as in FIG. 5 now showing a variation in the gear
arrangement;
[0019] FIG. 7 is a side elevation view of a sanitizer fixed to a
portion of a door with its cover opened;
[0020] FIG. 8 is a side elevation view of a door handle treatment
device showing removal and replacement of the aerosol source;
[0021] FIG. 9 is a perspective view a door handle treatment device
showing optional further features;
[0022] FIG. 10 is a front elevation view of a door handle treatment
device, absent the outer cover, to show optional further interior
components;
[0023] FIG. 11 is a front elevation view of a door handle treatment
device, absent the outer cover, to show optional interior
components in accordance with a variation of FIG. 10;
[0024] FIG. 12 is a side elevation view of a the door handle
treatment device of FIG. 11; and
[0025] FIG. 13 is a front elevation view of a door handle treatment
device, absent the outer cover, illustrating an arrangement and
cooperation of a valve attachment with surrounding mechanical and
electrical elements.
DETAILED DESCRIPTION OF CERTAIN EMBODIMENTS
[0026] By way of overview and introduction, the inventor has
discovered that systems that automatically spray an aerosol mist
onto a non-porous surface for purposes of cleaning the surface, or
sanitizing the surface, or disinfecting the surface (more
generally, "ultra-cleaning") lose their effectiveness over a short
period of time if the solution in the mist is not engineered so as
to evaporate without leaving a residue. In the absence of residue,
the compositions used to ultraclean a surface can no be lower in
concentration, have a lower to no environmental impact, or both.
Under headings in the following discussion, first an automated
sprayer for periodic dispensing of an aerosol mist is described.
The spray dispensor 10 is suitable for a variety of non-porous
surfaces, but is described in the context of a particularly
preferred mode of operation in which the dispensor is mounted
adjacent to a door handle for ultra-cleaning the handle. Next,
formulations engineered for periodic spraying without an
intervening surface-wiping operation are described which achieve at
least one of the primary objectives of avoiding residue buildup and
comprising an environmentally safe chemical composition.
The Dispensor
[0027] FIG. 1 illustrates a perspective view of a door 5 equipped
with a spray dispenser 10 in accordance with a first embodiment of
the present invention. Spray dispenser 10 is operable to spray a
germicide 2 therefrom to coat, and thereby ultraclean, an outwardly
extended door handle 14. FIG. 2 illustrates an exploded view of the
dispenser 10.
[0028] Referring to FIGS. 1 and 2, spray dispenser 10 includes an
outer housing 21, base 22, internal control switches 23 and visible
indicator lights 24 for providing control and status information of
dispenser 10.
[0029] Spray dispenser 10 is preferably mounted to door 5 above
door handle 14 as indicated. Outer housing 21 is hingedly connected
to base 22 via prongs 38. Prongs 38 are configured to fit through
orifices 39 of housing 21 and allow for rotational movement of the
outer housing 21 between a close and opened position. In a closed
position, outer housing 21 completely conceals the internal
components of dispenser 10, while in an opened position, outer
housing 21 provides access to germicide source 47 as well as other
internal components contained within dispenser 10, such as
batteries 45 and internal control switches 23.
[0030] Outer housing 21 of spray dispenser 10 comprises a top wall
27, a bottom wall 28 and, for the purpose of presenting a pleasant
appearance, a curved front wall 26. Dispenser 10 also includes a
component support wall 29 to which the majority of the internal
components of spray dispenser 10 are attached.
[0031] A germicide source 47, preferably in the form of an aerosol
can, is removably mounted within spray dispenser 10. Specifically,
with reference to FIG. 3, germicide source 47 is retained by a
mounting bracket 49 which functions to secure germicide source 47
in place thereby placing valve 57 and elongated nozzle 56 in proper
alignment with spray actuator 52. Mounting bracket 49 also provides
an efficient means for removal of germicide source 47 in the event
replacement is necessary. As illustrated, mounting bracket 49 is
preferably U-shaped having a base portion 81 and two arms 83
extending therefrom for securing germicide source 47 therebetween.
Base portion 81 is fixed to component support wall 29. Mounting
bracket 49 should have flexible properties such that arms 83 are
capable of flexing widthwise to allow insertion of germicide source
47 within the confounds of the arms, while also maintaining their
shape so as to completely support the weight of germicide source
47. Accordingly, germicide source 47 can "snap in" and "out" of
bracket 49 with minimal force and without causing damage to either
the bracket of the germicide source and, as stated above, should be
sufficient to secure germicide source 47 in place within spray
dispenser 10 without the need for additional securing mechanisms.
One of ordinary skill in the art would realize that various
alternative mounting devices can be employed for securing germicide
source within spray dispenser 10, e.g., Velcro straps, ties, belts,
clamps, etc., and a spray dispenser 10 according to present
invention can be readily adapted to function with any such
alternative securing device. As an alternative to bracket 49, or in
addition thereto, a clamp 197 is provided which also serves to
support and retain germicide source 47 within spray dispenser 10.
Clamp 197 is configured to slidably engage the neck portion of
germicide source 47 and mate with a complimentary fixture within
the housing (not shown) so as to lock the canister in place.
Because clamp 197 must first be removed before removal of germicide
source 47 is possible germicide source 47 will remain fixed within
the housing when clamp 197 is set in place.
[0032] A motor 50, gear 54, arm 55 and spring 57, herein
collectively referred to as the spray actuator 52, are supported
within a motor mount bracket 51. Motor mount bracket 51, as with
mounting bracket 49 described above, is also fixedly attached to
component support wall 29. When outer housing 21 is in a closed
position both mounting brackets 51 and 49, germicide source 47 and
spray actuator 52 are all shielded from view under the cover of
outer housing 21. The relationship between the individual
components of spray actuator 52 and their operation in mechanically
effecting the release of germicide 2 from source 47 will now be
described in detail with reference to FIGS. 3-5.
[0033] An arm 55 is pivotally mounted to motor mount 51 and engages
the elongated nozzle 56. Valve 57 of germicide source 47 is aligned
with and fluidly connected to elongated nozzle 56. Elongated nozzle
56 is preferably fixed to the germicide source 47 via valve 57 and
includes a frangible joint to prevent tampering, i.e., removal of
elongated nozzle 56 from valve 57. The frangible joint is one of a
score or a break-line in nozzle 56 such that a force in excess of
an ordinary force on nozzle 56 during normal operation of the
device will sever nozzle 56 about the frangible joint making the
nozzle 56 inoperable with replacement canisters within the
treatment device 10. This insures that fresh nozzles 56 are used
with replacement cans to ensure a good dispersion through the
nozzle and a minimum of clogging. Referring to FIGS. 3-5, motor 50
is preferably a DC motor and is operable to rotate a gear 54
clockwise through an angle. The clockwise rotation of gear 54
effectuates a counter-clockwise rotational movement in arm 55. Arm
55 moves in synchronization with nozzle 56 and nozzle 56 preferably
includes a bearing or frictional surface configured to accept
upward driven force from arm 55. Since elongated nozzle 56 engages
arm 55, the counter-clockwise rotation of the arm 55 forces nozzle
56 upward against valve 57 applying a requisite degree of upward
force on valve 57 necessary to temporarily open the valve and
release germicide 2 contained in source 47 (FIG. 5). The release of
germicide 2 from valve 57 flows into elongated nozzle 56 which
directs germicide 2 outward from spray dispenser 10 into the
surrounding atmosphere and onto handle 14. A spring 58 is fixedly
attached between arm 55 and motor mount bracket 51 and is necessary
for returning arm 55 to a normal position (shown in FIG. 4) after
making contact with and being forced by gear 54.
[0034] Different configurations of arm 55 are possible without
departing from its essential function, namely to move nozzle 56
toward valve 57 to temporarily open the valve and release germicide
2 contained in source 47. In accordance with an alternative
arrangement, nozzle 56 includes an external feature such as a
tooth, groove or slot, or a series of teeth, grooves or slots. When
the germicide source 47 is installed and properly aligned the
external feature is contactable by arm 55 such that rotation of arm
55 brings the arm in contact with the external feature on the
nozzle so as to force nozzle 56 toward valve 57.
[0035] It should be understood that motor mount bracket 51 supports
the components of spray actuator 52 within spray dispenser 10
without impinging the removal of germicide source 47.
[0036] Referring to FIG. 5, gear 54 is preferably configured with
equi-distance protrusions or notches along it's peripheral capable
of contacting arm 55 and forcing it to pivot as discussed above.
Because the forcing of arm 55 by gear 54 results in the opening of
valve 57, the longer arm 55 is forced by the gear, the longer valve
57 will remain open and the greater the amount of germicide 2 can
be released. The spacing between protrusions on gear 54, the width
of each protrusion and the rotational angle through which gear 54
rotates each time motor 50 is activated will all effect how long
valve 57 is opened and hence, how much germicidal 2 is released for
each given activation. Accordingly, the amount of germicidal
released during each activation of spray dispenser 10 can be
controlled and an increase or decrease in the amount of germicidal
2 realized by configuring gear 54 so that for each rotation it is
contacts and forces arm 55 for a longer or shorter period of
time.
[0037] In alternative arrangements, the spray activator 52 can be
configured with different gears so as to effect a temporary opening
of the spray valve 57. Referring to FIG. 6, the equi-distance
protrusions on gear 54 of FIG. 5 have been replaced by a series of
ribs which correspond to a series of receiving orifices on arm 450.
Gear 449 can be configured, by adjusting the size and number of
ribs, to allow different time intervals in which force is applied
to valve 57. Thus, effecting the amount of germicidal spray
released from the valve and ultimately onto the handle. Still in
further arrangements the spray activator 52 can be configured to
pressurize a dose or ampoule of germicide from a reservoir to
release the pressurized fluid as a spray onto the handle 14.
[0038] Referring to FIG. 2, component support wall 29 defines a
battery-containing compartment 44 at a top marginal edge thereof
for supporting two AA batteries 45 and includes a control circuit
31 mounted thereto for receiving signals from switches 23,
processing the received signals and controlling indicator lights 24
and motor 50. Control circuit 31 is operable to trigger optional
indicator lights 24 during the operation of spray dispenser 10,
signaling the user of such occurrences as when switches 24 or spray
dispenser 10 have been activated. Control circuit 31 is preferably
preprogrammed to activate motor 50 at prescribed intervals which
are determined by setting switches 23. For instance, switches 23
define a variety of user selectable time intervals and, in response
to a specific switch setting, control circuit 31 supplies power to
motor 50 at certain intervals. Each time motor 50 is powered it
will trigger spray actuator 52 and release germicide 2 from source
47. Since it is known and fairly common that any microcontroller
capable of controlling and processing signals indicative of
operational time intervals may generally be used, the particular
implementation of control circuit 31 has been omitted for clarity.
Conventional wires connect control circuit 31 to power (supplied by
batteries 45), indicator lights 24, user operable control switches
23 and motor 50.
[0039] Referring to FIGS. 4 and 5, elongated nozzle 56 is aligned
with a through hole 68 on bottom wall 28 of the housing 21. Through
hole 68 functions as an access point through which elongated nozzle
56 exits housing 21. The elongated nozzle 56 is fluidly connected
to the germicide source 47 via valve 57 to receive germicide
therefrom and is oriented to spray germicide in axial dimension A
of housing 21 (FIG. 1) away from the bottom wall 28 of the housing
21 and toward handle 14 of the door 5. This outwardly directed
spray 72 should be of a force and breadth to completely cover at
least half the entire perimeter 15 of handle 14.
[0040] Referring to FIG. 2, installation of spray dispenser 10
begins by first positioning base 22 proximate to the door handle 14
(e.g., above the door handle on the door itself) and securing it to
the door via screws 35. Next, component support wall 29 is mounted
to base 22 using any conventional securing or locking means, such
as screws, glue, Velcro, clips, snap-fit arrangements, etc.
Finally, batteries 45 are inserted in battery compartment 44,
germicide source 47 is inserted into mounting bracket 49 and outer
cover 21 is fixedly attached to base 22 at support prongs 38. Outer
cover 21 can now be closed providing complete cover for support
wall 29 and the components thereon and spray dispenser 10
activated.
[0041] As further illustrated with reference to FIGS. 7 and 8,
prongs 38 are configured to rest within orifices 39 of outer cover
21 and provide pivotal movement of the cover about the prongs 38,
thereby permitting "opening" of spray dispenser 10 by pivoting
cover 21 away from support 22 and "closing" of spray dispenser 10
by pivoting cover 21 toward support 22. Thus, complete access to
both battery compartment 44 and germicide source 47 can be
achieved. Optionally, the cover and support can be severed to one
another with a lock or keyed release so as to prevent tampering by
unauthorized individuals.
[0042] The germicide 2 contained in source 47 and sprayed on the
handle 14 can comprise a disinfecting liquid, aerosol, mist or the
like, and is preferably characterized by it's ability to ultraclean
surfaces it comes into contact with. According to alternative
embodiments of the present of invention, germicide 2 comprises a
chlorine-based chemical solution as this provides a relatively
non-flammable fluid (as compared to an alcohol-based solution) and
also provides the germicide function discussed above. It is to be
understood that the term "germicide" used herein is not intended to
be limited to any particular type of chemical solution or fluid and
the scope and meaning of this term includes any suitable fluid or
composition which acts as a disinfectant. Optionally, a scent
additive may be included in the fluid in order that the
ultra-cleaning fluid may also function as an air freshener.
[0043] In certain instances, such as with room doors and the like,
the spray dispenser 10 dispenses germicide 2 at certain given
intervals in time, for example by a time switch, clock control, and
the like. According to alternative aspects of the invention, the
spray actuator 52 can be triggered in response to manipulation of
the door handle 14, such as after each individual manipulation or
following a given series of such manipulations. In the latter case,
a counter can initiate the release of germicide 2 whenever a
predetermined count is reached. Such cases just cited are all
examples of a controlling software program. It is this software
program that is responsible for automating the disinfecting methods
disclosed earlier, by activating the handle sterilization process
when a predetermined state or function is sensed.
[0044] Referring to FIG. 9, optional further features are shown in
which the front wall 26 further comprises a sensor 95 for
triggering spray actuator 52. Sensor 95 can be optical, infrared,
mechanical/electrical or a combination of the above. Thus, in this
arrangement the actuator 52 can activate the spray when a person or
movement is detected in a vicinity of the handle or when a light
beam interruption or vibration is detected. Alternatively, sensor
95 can be used to disable the spray mechanism or turn off the unit
for a specific period of time, rather than to activate the spray
mechanism. For example, spray dispenser 10 can be controlled to
dispense germicide 2 at certain given intervals in time as
discussed above and sensor 95 can serve to disable the spray
dispenser when a certain condition is sensed by the sensor, for
example, sensor 95 can comprise an optical sensor and be triggered
to suppress further spraying when the lights are turned off or a
person is close to the unit.
[0045] Referring to FIG. 10, a front elevation view of a door
handle treatment device 100 having further, optional features is
shown. As in the door handle treatment device illustrated in FIG.
3, Door handle treatment device 100 includes a motor 50 and a first
gear system comprising gears 54 and 55. Referring to FIG. 10,
further features include a second gear system comprising spray
gears 102, 103 and 109, a mechanical shutter 105, shutter motion
sensor 106, nozzle 104, frangible joint 107, spindle 114 and
gear-bearing hollow tube 108. As shown, the second gear system is
isolated from the first gear system yet coupled thereto by the
attachment. Further, the shutter 105 and motion sensor 106 are
provided to block the aerosol spray unless gears 102, 103 and 109
are set in motion by track 111 on gear-bearing tube 108.
Gear-bearing tube 108 conveys aerosol from valve 57 of aerosol can
47 to nozzle 104, into conical opening 110 and outward from spray
device 100.
[0046] Shutter 105, when positioned at rest, blocks the exit of
aerosol spray from nozzle 104. Tube 108 and spray valve 57 move
vertically (as illustrated) in a reciprocal motion, meaning each
time tube 108 is forced into motion by arm 55 (as discussed with
respect to FIG. 5), tube 108 and valve 57 are forced toward aerosol
can 47, resulting in a momentary spray of aerosol from the can.
Valve 57, nozzle 104 and tube 108 are fluidly connected such that
aerosol spray exiting valve 57 travels through the tube 108 to
nozzle 104 before discharging from the housing of the door handle
treatment device 100.
[0047] Gears 102, 103 and 109 cooperate with the movement of tube
108 and have a ratio of movement chosen to result in rapid movement
of shutter 105 so as to clear a path for the aerosol spray in
response to a comparatively smaller reciprocal movement of the tube
108. An exterior feature (track 111) disposed on tube 108 moves
synchronously with tube 108. Track 111 can comprise a series of
bearing surfaces, e.g., teeth, grooves or slots, which are operable
to engage with corresponding receiving features on gear 102. When
tube 108 is forced upward by arm 55, track 111 sets gear 102 into a
clockwise rotation. Gear 103 is mechanically engaged, via gear 109,
between gear 102 and shutter 105 and responds to movement of gear
102 by rotating counter-clockwise and forcing movement of shutter
105. Gear 109 is preferably at least two magnitudes smaller than
gears 102 and 103 and is fixedly mounted to gear 103 to provide a
mechanical advantage, such that a small translation of tube 108 in
the vertical direction results in a large translation of shutter
105 in relation to conical opening 110. This is necessary for
shutter 105 to overcome at least a good portion of the distance of
conical opening 110, which is a larger distance than the tube 108
moves in the vertical direction. The resulting effect of the
counter-clockwise movement of gear 103 is to force shutter 105 to
its displaced position such that it unblocks conical opening 110
allowing aerosol spray to exit there through. This is accomplished
by including a bearing or frictional surface on a portion of the
side of shutter 105 in communication with gear 103 such that the
forced rotation of gear 103 moves shutter 105. One of ordinary
skill in the art will realize that any general pattern of apertures
can be disposed on shutter 105 as long the apertures are capable of
mating with corresponding apertures on gear 103.
[0048] Shutter 105 includes a flexible portion or component
extending outward from its midpoint and is therefore operable to
flex about spindle 114 as it is set into motion by gear 103, as
described above. Since tube 108 is recessed, a conical opening 110
on housing 100 is preferred so that aerosol spray has an even
dispersion pattern when exiting the housing.
[0049] After tube 108 has been activated, causing aerosol spray to
discharge from spray dispenser 100, tube 108 will return to its
rest position reversing the movement of gears 102, 103 and 109,
thereby causing shutter 105 to return to its rest position (e.g.,
to close conical opening 110). The downward motion of tube 108 is
the same as previously described except all gears move in the
reverse direction.
[0050] Sensor 106, embodied as a switch in FIG. 10, is positioned
so as to detect movement of shutter 105 and exposure of the nozzle
104. When gear 103 is set into motion, it moves shutter 105 into
contact with sensor 106. Sensor 106 is connected to control circuit
31 (FIG. 2) and sends a movement signal to the control circuit in
response to being triggered by movement of shutter 105. This
movement signal is indicative of the fact that shutter 105 has
moved a predetermined amount suitable to be sensed by the sensor
106. The sensor can comprise a mechanical switch, but one of
ordinary skill in the art will realize that other types of sensors
can be used in place of a mechanical switch, e.g.,
electromechanical, optical or magnetic sensors. Regardless of the
type of sensor 106 employed, it must be positioned and/or
configured such that it is operable to detect at least movement of
the shutter in one direction (e.g., each opening of the
shutter).
[0051] Door handle treatment device 100 further includes software
programmed in control circuit 31 or elsewhere within the spray
dispenser to monitor any sensed shutter 105 movement. One way for
the software to monitor sensed shutter 105 movement is by testing
for a state change in sensor 106. In accordance therewith, sensor
106 can be configured to go from an open state to closed state and
from the closed state back to the open state in one spray cycle. If
such state changes in sensor 106 do not occur in a specified time
frame, it can be inferred that the mechanisms of door handle
treatment device 100 have either failed, been tampered with or a
non-approved aerosol can is being used, in which case further spray
cycles can be suspended by the software. The software preferably
comprises a timing circuit to determine shutter 105 movement
necessary to continue to permit triggering of the aerosol spray. In
accordance with a salient aspect of the present invention, the
timing circuit can be overridden by an optical proximity sensor
(not shown) which, as discussed above with respect to sensor 95 of
FIG. 9, can be used to disable treatment device 100 under certain
conditions, e.g., off peak hours of operation.
[0052] A reset can be built into the software which resets control
circuit 31 so as to reactivate the circuit after spray cycles have
suspended. The reset can be activated mechanically in which case an
authorized person can manually trigger a reset switch on the
housing (not shown). Alternatively, the reset can be automatically
programmed into the software so as to automatically reset control
circuit 31 to resume spray cycles after a prescribed time of
inactivity due to lack of a movement signal being provided to the
software.
[0053] In accordance with another aspect of the present invention
and with continued reference to FIG. 10, tube 108 connects to valve
57 of aerosol can 47 using a strong adhesive, epoxy or heat seal
(e.g. a melt bond) and is connected so as to prevent separation of
the tube 108 from the valve 57. A frangible joint 107 is disposed
between a first end of the tube 108 and the track 111 and is
provided to weaken the connection therebetween. Frangible joint 107
is preferably formed in the material of the tube 108 but can
comprise a separate element in the joint 107 is constructed with a
weak portion so as to break the tube 108 at a location near aerosol
can spray valve 57 should someone attempt to disconnect tube 108
from valve 57. Preferably, the frangible joint 107 includes a
score, perforation, break-line, or any other feature that is weaker
than the bond between the valve 57 and the tube 108. Frangible
joint 107 acts as a security feature should a person attempt to
disconnect aerosol can 47 from tube 108 and reuse it with another
can. Its construction is operable to break the tube 108 and shorten
its overall length, rendering it incapable of driving gear 102, in
the event that the tube is thereafter reattached to another valve
57, because the track 111 will no longer align with the gear
102.
[0054] FIGS. 11 and 12 are respective front and side views of a
door handle treatment device 200 according to an alternative
arrangement of the one illustrated and described in FIG. 10 above.
The alternative arrangement illustrated in FIGS. 11-12 includes all
of the components described above with respect to FIG. 10 with the
exception of the spindle 114, and is arranged in a more compact
form, requiring one less gear. Door handle treatment device 200
includes gears 202 and 203, mechanical shutter 105, shutter sensor
106, nozzle 104, frangible joint 107 and gear-bearing tube 108. The
shutter 105 and motion sensor 106 functions remain the same,
namely, to block the aerosol spray unless gears 202 and 203 are set
in motion by track 111 on gear-bearing tube 108. Gear-bearing tube
108 conveys aerosol from valve 57 of aerosol can 47, through
conical opening 110, outward from spray device 200 via the nozzle
104.
[0055] Gears 202 and 203 cooperate with the movement of tube 108
resulting in rapid movement of shutter 105 so as to clear a path
for the aerosol spray to emit from the nozzle. A track 111 disposed
on tube 108 moves synchronously with tube 108. Track 111 comprises
a feature suitable for moving the gears, e.g., teeth, grooves or
slots, which are operable to engage with corresponding receiving
features of gear 202. When tube 108 is forced upward by arm 55
track 111 sets gear 202 into a counter-clockwise rotation. Gear 203
is fixed to gear 202 and is at least two magnitudes larger in
diameter and preferably four magnitudes larger. Accordingly, gears
202 and 203 move together. Gear 203 engages shutter 105 forcing the
shutter to move horizontally when the gear is in motion. The
resulting effect of the counter-clockwise movement of gears 202 and
203 is to move shutter 105 such that it unblocks conical opening
110 allowing aerosol spray to exit there through. Since tube 108 is
recessed, a conical opening 110 on housing 100 is preferred so that
aerosol spray has a proper dispersion pattern when exiting the
unit. A bearing or frictional surface on a portion of the side of
shutter 105 in communication with gear 203 is preferred such that
the forced rotation of gear 203 drives movement of the shutter 105.
Raised features or apertures configured to engage the gear 203 can
also be employed to engage and move the shutter.
[0056] Similarly to the discussion following FIG. 10, after tube
108 has been activated causing aerosol spray to discharge from
spray dispenser 100, the tube 108 will return to its rest position
reversing the movement of gears 102, 103 and 109, thereby causing
shutter 105 to generally overlie the axis of the tube 108 and the
nozzle 104, and perhaps close conical opening 110. Sensor 106,
embodied as a switch, is positioned so as to detect movement of
shutter 105.
[0057] Referring now to FIG. 13, the cooperation of a sensor 206
with movement of a hollow delivery tube 208 is described to
illustrate for the aspects in accordance with certain aspects of
the invention. Sensor 206 and tube 208 can be of the same
construction as sensor 106 and tube 108. In the arrangement shown
in FIG. 13, energy from the motor 50 (not shown; see FIG. 3) is
conveyed to a protruding bearing surface 254 supported by the
delivery tube by a driven arm 255. The arm is pivoted or rotated in
response to a gear 212 that is placed in rotation with activation
of the motor. The motor is activated by the control circuit 31
described above, typically by a voltage applied across the motor
terminals ("energization signal"). Preferably, the energization
signal is a DC voltage.
[0058] As illustrated, a first gear system 210 comprising gears
212-220 are positioned and sized so as to move the arm 255 in a
clockwise rotation (see arrow). With rotation of the arm 255, a
generally axial (upward) force is imparted to the bearing surface
254 to cause the tube 208 to reciprocally move upward and open the
valve 57 of the aerosol can. The valve opens only momentarily
because continued rotation of gear 220 advances pivot arm 255 to
the position shown in broken lines beyond and clear of the bearing
surface 254. The arm can continue to rotate to a rest position,
after the motor stops driving the gear system 210, such as at, say
the 8 o'clock position. Once the pivot arm has moved past the
bearing surface 254, the tube 208 returns to its rest (downward)
position (as shown) in which the valve 57 is closed. The pressure
in the aerosol can biases the valve to position the delivery tube
in the rest position. The gear system 210 can comprise multiple
gears or just one gear.
[0059] Movement of the delivery tube in an axial direction includes
a synchronous movement of an exterior feature associated with the
tube. The exterior feature can be a portion of the bearing surface
254 (such as segment 254a on an opposite side from where the arm
255 contacts the bearing surface), but is illustrated as a separate
exterior feature 211. Exterior feature 211 has a rest position A
when the tube is disposed such that the valve 57 is closed (the
downward position) and a displaced position B when the tube has
been urged by the arm 254 to the open-valve position (the upward
position) with a concomitant displacement of the tube 208. When the
sensor 206 comprises a mechanical switch, the exterior feature 211
alternately depresses the mechanical contact of the sensor
(position C) or permits release of the mechanical contact (position
D) as a function of the position of the delivery tube 208. A bias,
not shown, normally urges the contact switch toward position D, in
a conventional manner. Thus, the reciprocal movement of tube 208
causes alternate state changes of sensor 206 as the contact moves
between positions C and D (at that moment or thereafter). As can be
appreciated, the sensor 206 can take forms other than a mechanical
switch (e.g., an opted sensor or a vibration sensor or a sound
sensor) with the exterior feature 211 adapted to cause a state
change which is detected in synchronization with movement of the
tube 208. The state change sensed by the sensor delivers control
signals to the control circuit 31. Software executing within a
processor of the control circuit can be configured to react to the
presence or absence of the state signals, generally, and more
particularly in relation to other events such as the timing of
receipt of such signals relative to delivery of the motor
energization signal or a particular time interval. In the event
that the state signals are not generated during a motor actuation
cycle, the control circuit can inhibit delivery of further motor
energization signals, or not generate such motor energization
signals any longer.
[0060] As can be appreciated from the foregoing, software resident
in the control unit 31 is in electrical communication with the
sensor 206 in order to confirm or determine whether the state of
the sensor is changing with each actuation of the motor, and hence,
with each dose of the aerosol spray. Preferably, the system has
logic in the control unit which is programmed to energize the motor
and cause the first gear system 210 to reciprocally move the tube
208 only if the sensor registered a state change on the prior
actuation of the motor. This ensures that an appropriate aerosol
source has been properly loaded in the dispenser. The logic of
control unit 31 can enable one or more sprays without a state
change having been detected, for example, just after closing the
dispenser lid.
[0061] Thus, sensor 206 senses the movement of the tube 208 through
its cooperative arrangement with external feature 211. The sensor
transitions between closed and open states and between open and
closed states with reciprocal movement of the delivery tube 208.
These state changes are expected by the control unit 31 to occur
within a time interval (e.g., 300 ms) corresponding to one spray
cycle or to be detected while the motor drive signal is being
applied to the motor. This enables the logic unit to react in the
event that signals are not as expected, for example, if the aerosol
can and its delivery tube 208 are not properly loaded within the
dispenser housing.
[0062] The control unit 31 can suppress further motor actuations if
the sensor 206 does not deliver state change signals. The motor
actuation cycle can also be suppressed if certain external
conditions are detected such as the presence of a hand of a person
in the vicinity of the treatment device 200.
[0063] With continued reference to FIG. 13, a movable guide 199 is
shown in an operative position in which it seats in proximity to
tube 208. The guide can be a rotatable wheel. The guide is movable
within the confines of slot 198 between a loading position, e.g.,
the left most end of the slot, and an operative position, e.g.,
seated in rotatable proximity to tube 208. Guide 199 is moved from
the operative position to the loading position prior to removing
the germicide source and tube 208a seat within the treatment device
housing. Once the germicide source, or a new germicide source, is
seated within the treatment device housing the guide 199 is moved
back to the operative position in (optionally rotatable) proximity
to the valve. Only once the guide is in the operative position is
the germicide source operational within the treatment device.
[0064] Referring again to FIG. 1, handle 14 can take any shape or
size and is preferably configured to assist in opening and closing
of door 5. Handle 14 can be of a stationary type used to push or
pull door 5 or can be mechanically mounted and include a
conventional locking mechanism, requiring rotation of a handle to
unlock the door prior to opening and closing. While the handle is
illustrated as a conventional cylindrical shaped door handle, the
spray dispenser 10 described herein is operable to ultra-clean any
door handle and examples of several handle shapes which can be
ultra-cleaned by spray dispenser 10 include, but are not limited
to, spherical, rectangular, hexagonal, rod or hook-shape handles
and composites thereof. Handle 14 has a knob portion 13 comprising
an outer perimeter 15 and a diameter dimension D which extends
through the center of knob 13 to the outer perimeter 15. One of
ordinary skill in the art would realize that door 5 can be
handless, and in place of the handle a flat plate could be affixed
to the surface of the door for pushing or pulling the door. As
described in greater detail below, the embodiments of spray
dispenser 10 described herein can be equally applied to such plate
arrangements by orientating nozzle 56 to direct the germicide spray
onto a plate-type arrangement as opposed to a protruding handle
14.
[0065] Although the embodiments of the invention were described
with reference to a disinfection apparatus for restroom doors it
should be noted that at least some of the embodiments are suitable
also for disinfecting other kinds of handles, such as handles of
cabinets for the sterile storing of surgical instruments, doors of
operating theaters or rooms in hospitals etc.
[0066] Expedients of the present invention described in one
embodiment are not to be limited to that embodiment and can be
readily combined with any of the other described embodiments.
Furthermore, any feature of one embodiment, not expressly described
in connection with an alternative arrangement or embodiment, can be
combined with that arrangement or embodiment to derive benefit
there from.
The Formulations
[0067] A variety of formulations can be used in treatment devices
in accordance with the invention, including the embodiments
described above. Common to all of them is that they include an
amount of triethylene glycol which is insufficient to leave a
residue after evaporation of the aerosol mist emanating from the
treatment device. A suitable formula can contain no triethylene
glycol at all, as in each of the examples below except for Example
10 because Example 10 is a formulation that is not in accordance
with the present invention.
[0068] In one formulation in accordance with the invention,
hydrogen peroxide (H.sub.2O.sub.2) comprises a part of the
ultra-cleaning solution. The H.sub.2O.sub.2 greatly improves the
performance of the ultra-cleaning solution. Hydrogen peroxide is
available commercially in a concentration of 35% by weight in an
aqueous solution. The present maximum allowable actual
concentration of hydrogen peroxide in a product to avoid health and
environmental hazards is 7.9%. Products having hydrogen peroxide
concentrations of more than 8% require a health hazard warning
label.
[0069] Accordingly, hydrogen peroxide is used in a formulation in
accordance with the present invention as disclosed, such as
indicated in the following examples, but more generally can consist
of approximately 0.1 to approximately 7.5 percent, approximately
0.5 to approximately 2.5 percent, approximately 1 to approximately
3 percent, approximately 2 to approximately 5 percent, and
approximately 5 to approximately 7.5 percent by weight.
Formulations comprising hydrogen peroxide solutions can also
consist of approximately 5 to approximately 25 percent hydrogen
peroxide by weight.
[0070] Hydrogen peroxide is an active ingredient in cleaning,
sanitizing and disinfectant solutions. While not being limited to
any single mechanism, hydrogen peroxide is a reactive substance and
this activity is one possible source of its germicidal
characteristics.
[0071] A solution in accordance with the invention includes ethanol
as a component. Certain concentrations of ethanol are known to have
a sanitizing or disinfecting effect. While not being limited to any
single mechanism, the ethanol may serve an active role in the
cleaning, sanitizing and/or disinfecting performance of the
solutions of the present invention, or it may play a role as a
solvent for delivery of the aerosol mist.
[0072] A solution in accordance with the invention includes water
as a component. The water used in any of the solutions described
herein is preferably deionized water. The water serves as a solvent
for delivery of the aerosol mist.
[0073] The aerosol dispenser will normally be pressurized by
incorporating therein a gaseous component generally known as a
propellant. Common aerosol propellants, e.g., gaseous hydrocarbons
such as isobutane, and mixed halogenated hydrocarbons, are not
preferred. Halogenated hydrocarbon propellants such as chlorofluoro
hydrocarbons have been alleged to contribute to environmental
problems. Preferred propellants are compressed air, nitrogen, inert
gases, carbon dioxide, etc. A more complete description of
commercially available aerosol-spray dispensers appears in U.S.
Pat. No. 3,436,772, Stebbins, issued Apr. 8, 1969; and U.S. Pat.
No. 3,600,325, Kaufman et al., issued Aug. 17, 1971; both of said
references are specifically incorporated herein by reference.
[0074] The ultra-cleaning solution is maintained under pressure
within an aerosol canister and is dispersed as an aerosol mist. An
aerosol dispenser of the present invention comprises a container
which can be constructed of any of the conventional materials
employed in fabricating aerosol containers. Aerosol dispensers are
generally capable of withstanding internal pressure in the range of
from about 5 to about 100 p.s.i.g., more preferably from about 10
to about 60 p.s.i.g. Typically the dispenser is comprises a valve
member that permits the ultra-cleaning composition contained in the
dispenser to be dispensed in the form of a spray of very fine, or
finely divided, particles or droplets ("mist"). The aerosol
dispenser utilizes a pressurized sealed container from which the
composition is dispensed through a special actuator/valve assembly
under pressure. One embodiment of an actuator/valve assembly is
disclosed in U.S. Patent Publication US 2006/0153733 (application
Ser. No. 11/104,292), which is herein incorporated by
reference.
EXAMPLES
[0075] The following formulations are presented by way of example
and are not intended to limit the scope of the present invention.
The examples illustrate formulas that can be used with a dispenser
as described herein to provide an aerosol mist onto a non-porous
surface such as a door knob, door latch, door handle, or push
plate, which evaporates to leave a surface free of any residue.
Ultracleaning Solution 1
[0076] 1% hydrogen peroxide (H.sub.2O.sub.2) [0077] 25% ethanol
[0078] 74% water Ultracleaning Solution 2 [0079] 2% hydrogen
peroxide (H.sub.2O.sub.2) [0080] 25% ethanol [0081] 73% water
Ultracleaning Solution 3 [0082] 5% hydrogen peroxide
(H.sub.2O.sub.2) [0083] 25% ethanol [0084] 70% water Ultracleaning
Solution 4 [0085] 1% hydrogen peroxide (H.sub.2O.sub.2) [0086]
49.5% ethanol [0087] 49.5% water Ultracleaning Solution 5 [0088] 2%
hydrogen peroxide (H.sub.2O.sub.2) [0089] 49% ethanol [0090] 49%
water Ultracleaning Solution 6 [0091] 5% hydrogen peroxide
(H.sub.2O.sub.2) [0092] 47.5% ethanol [0093] 47.5% water
Ultracleaning Solution 7 [0094] 1% hydrogen peroxide
(H.sub.2O.sub.2) [0095] 70% ethanol [0096] 29% water Ultracleaning
Solution 8 [0097] 2% hydrogen peroxide (H.sub.2O.sub.2) [0098] 70%
ethanol [0099] 28% water Ultracleaning Solution 9 [0100] 5%
hydrogen peroxide (H.sub.2O.sub.2) [0101] 70% ethanol [0102] 25%
water Ultracleaning Solution 10 [0103] 6% triethylene glycol [0104]
0.1% morpholine [0105] 0.1% alkyl dimethyl ethylbenzyl ammonium
chloride [0106] 0.1% alkyl dimethyl benzyl ammonium chloride [0107]
1.0% ammonium hydroxide solution [0108] 9.0% water [0109] 30.0%
isobutane [0110] 53.0% isopropanol Ultracleaning Solution 11 [0111]
0.1% morpholine [0112] 0.1% alkyl dimethyl ethylbenzyl ammonium
chloride [0113] 0.1% alkyl dimethyl benzyl ammonium chloride [0114]
1.0% ammonium hydroxide solution [0115] 9.0% water [0116] 30.0%
isobutane [0117] 53.0% isopropanol
[0118] The quaternary ammonium salts alkyl dimethyl ethylbenzyl
ammonium chloride and alkyl dimethyl benzyl ammonium chloride are
available commercially as BTC.RTM. 2125M (50% active) EPA Reg. No.
1839-46 (Stepan Co., USA)
[0119] After repeated use, Ultracleaning Solution 10 produced a
sticky residue build-up on the surface to which it was applied.
Ultracleaning solution 11 does not contain triethylene glycol and
does not produce a sticky residue after repeated application to the
same surface.
[0120] In view of the foregoing description, the compositions,
devices, systems and methods disclosed and claimed herein can be
made and executed without undue experimentation. While the various
aspects of this invention have been described in terms of specific
and preferred embodiments, it will be apparent to those of skill in
the art that variations may be applied to the compositions,
devices, systems and/or methods and in the steps or in the sequence
of steps of the methods described herein without departing from the
concept, spirit and scope of the invention. More specifically, it
will be apparent that certain agents that are chemically or
physiologically related may be substituted for the agents described
herein while the same or similar results would be achieved. All
such similar substitutes and modifications apparent to those
skilled in the art are deemed to be within the spirit, scope and
concept of the invention as defined by the appended claims.
* * * * *