This invention generally relates to a user interface device and more particularly to a device for enhancing respiration during various user activities.
A positive air pressure (PAP) type respiration system can be used with a face mask type device to deliver pressurized air to the patient's airway. This pressurized air is delivered via various types of face masks, a nasal mask, a nasal and mouth hybrid type mask, or a full face mask. There are a number of nasal masks such as a “nasal pillow” mask and the like, as well as other newer designs for masks such as nasal prong or oral masks. A PAP type system typically includes an air delivery hose which is connected between a PAP air source and a mask which is typically custom-fitted to the patient's face or part of the face being used.
When using a PAP type device, if the patient desires to use a nasal mask or a hybrid type mask then usually a chin strap is required to keep the mouth closed, Use of either of these two types of mask devices without a chin strap device can allow pressurized air to escape from the mouth, disrupting adequate air delivery to the lungs for effective ventilation.
Motion of the cheeks inward and outward can occur during certain physical exercise, during use of a PAP type device, or during the playing of an exhalation-powered musical instrument,
This cheek motion can create a variability of the inner volume of the mouth cavity and cause an air accumulator effect to occur, thus making inhalation and/or exhalation less direct and efficient. This air accumulator effect can make the automatic controls of a PAP type device less sensitive, and can result in the use of higher air delivery pressure than would otherwise occur. Unnecessarily higher air delivery pressures in a PAP type device can make the use of a PAP type device less comfortable and decrease patient compliance with the prescribed treatment. Cheeks expanded by air pressure inside the oral cavity and significant cheek motion can he judged unpleasant by PAP type device users. Therefore a need exists to limit significant cheek motion during use of a PAP type device or during certain physical activity.
Obstructive Sleep Apnea (OSA) and other sleep disorders can contribute to the onset of other serious chronic health problems such as high blood pressure, obesity, heart disorders, diminished concentration, excessive tiredness during the day, failing asleep while driving, and depression and anxiety disorders. Untreated OSA and other sleep disorders may contribute to serious health disorders such as autoimmune disorders and even cancer. USA and other sleep disorders which are untreated or inadequately treated can reduce one's quality of life and even seriously damage one's health over time and may contribute to a significantly shorter life expectancy.
PAP devices have been developed to be automatically adjusting to detect and limit air pressure delivery required to stop the occurrence of USA, thereby making the operation of the devices more comfortable for the patient and thereby increasing the likelihood of patient compliance. Sensors have been used to determine if USA or other sleep disorders are occurring due to inadequate pressure being supplied to the air from the PAP type device for good ventilation, and automatic controls have been invented and developed for increasing the pressure of the air delivered until such USA type and other sleep disorder events are reduced or stopped.
The prior art includes Australian Patent Application No. AU2005100738, to Respironics, entitled Patient Interface Device. Disclosed therein is a patient interface device which includes a frame that is sized and configured to span at least a portion of the patient's face while remaining below the patient's eyes when the patient interface device is worn by the patient. The patient interface device includes a support member that is sized and configured to span at least a portion of a patient's face while remaining below the patient's eyes. The patient
interface device purportedly provides a stable platform that supports a sealing assembly on the patient, while minimizing the amount of material worn on the patient's face and head.
Cheek depressor (CD) devices of the present invention engage a targeted region of a patient cheeks with a focused application of external forces at the targeted regions to limit significant cheek motion during inhalation and exhalation and with substantially no external forces being applied to the user's zygomatic bone or mandible by the CD devices. The target area is located between the mandible and zygomatic bone of the user.
The CD device enhances the effectiveness of PAP type medical device, enhances respiration during exercise or pursuit of individual or team sports, and enhances respiration while at rest or anytime and during any leisure activity. The CD device's specific size, shape, including shape of its inner cheek facing surface, and the three used to press it against each cheek can be customized to the individual user and the specific application. The CD device can be used in combination with PAP type devices and other applications where it is helpful to enhance respiration by preventing significant cheek motion which can occur during any exercise, including sport activities and playing of musical instruments,
Typically the CD device is pressed and held in place against the cheek at the target area with sufficient force to move the cheek inward to make contact with the teeth, gums and or upper or lower jaw, e.g., maxilla surfaces, but not so much force to abrade, bruise or harm the teeth, gums or upper or lower jaw or the jaw joint. The use of the CD device can prove useful by enhancing inhalation or exhalation with any activity which can produce significant cheek motion, including the forceful playing of exhalation powered musical instruments where strength of breath and stamina are important considerations. When pressed against each cheek with adequate force necessary to limit significant cheek motion, the CD device may make respiration more efficient during physical exercise, especially strenuous physical exercise, and enhances respiration any time, including during non-exercise.
A cheek depressor device embodiment of the present invention offers a means of preventing significant cheek motion during inhalation or exhalation which reduces an air accumulator effect of the mouth cavity. Embodiments of the invention can be used to enhance respiration in many diverse applications, including while recreating or while using a PAP type device. Other useful applications in medicine, leisure and industry will become clear as these devices gain more use.
In one embodiment, a CD device engages a target area of the cheek in order to enhance inhalation or exhalation by preventing significant cheek motion. In order for the device to be maximally effective it should be positioned to depress the targeted area of the cheek toward the inside of the mouth to cause the cheek to make contact with the teeth and gums. The device should be large enough and have its inner cheek side configured in a curved or slope manner such that it is able to provide the necessary contact with the cheek in order to prevent significant cheek motion during inhalation or exhalation.
The CD device can be used to enhance respiration, including, but not limited to, during the use of medical equipment such as positive airway pressure (PAP) type devices, or during the pursuit of sports. It can also be used to assist in the playing of exhalation powered musical instruments. The invention can be used to increase the effectiveness of the medical use of PAP type medical devices, including those which are non-automatic such as a basic CPAP device, as well as those that are automatically self adjusting such as an automatic CPAP, BiPAP, Bi-Level, V-Pap, C-Flex, A-Flex or the like which are typically used to treat Obstructive Sleep Apnea (OSA) and other sleep disorders, and which automatically adjust their air delivery pressure based on the patient's response, as indicated by sensors and processed by complex algorithms and microprocessors.
One object of this invention is to increase patient comfort as a means of increasing patient compliance when used with a PAP medical device. It is well known in the art that patient compliance with a PAP type device is reduced by a patient's discomfort while using that PAP type device. Therefore establishing and maintaining maximum patient comfort during the use of the PAP type device is an important and key factor in determining patient compliance.
Any significant motion of the cheeks during use of a PAP type device can be perceived by some patients as uncomfortable when it becomes noticeable and this is a common occurrence if higher air delivery pressures are used, or such higher air pressures occur as a response of any automatic, self-adjusting controls of any PAP type device.
Unrestricted cheek movement during use of a PAP type device can create a hydraulic accumulator effect which can reduce the effectiveness of the pressure transmission of the PAP device resulting in delayed pressure transmission, This delay of pressure transmission to the airway can necessitate higher PAP pressure settings than would otherwise be required to maintain adequate ventilation of the lungs. The accumulator effect can therefore increase the effort of the lungs needed to produce exhalation. Therefore, use of the CD device can decrease the effort of the lungs to produce inhalation and exhalation and may allow the use of lower settings of the PAP type device, enhancing comfort and compliance with the prescribed treatment.
Significant cheek motion during use of a PAP device itself is judged uncomfortable in some patients, and preventing cheek motion can contribute to patient comfort during their use of a PAP type device. Use of the CD device to depress the approximate center of the cheek can decrease the effort required to exhale by significantly preventing the accumulator effect that is associated with significant cheek motion, and can thereby increase the comfort of the patient while helping to elicit a quicker more direct response in any automatic, self-adjusting controls that the PAP type device may have, helping to keep the pressure of the air delivered by the PAP type device to a minimum level by reducing the amount of OSA or sleep disorder events.
An important object of the CD device is to increase the responsiveness of the automatic self-adjusting PAP device's control systems to allow a lower air delivery pressure setting than otherwise might be possible. This can help to increase patient comfort if the pressure can he somewhat reduced while still being adequate to prevent the occurrence of OSA or other sleep disorder events. It is known in the art that the higher the air delivery pressure by the PAP device, the greater the tendency for air to leak around the mask, whether it be a nose only mask, a full face mask or a hybrid form of the two. When air leaks occur due to higher air delivery pressures being used, then the solution typically is the tightening of the straps or headgear used to hold the mask type device securely to the face. It is known that tightening of the straps can decrease patient comfort in some cases.
During the use of a PAP type device, holding the air delivery pressure down to the lowest possible level while still high enough to prevent the occurrence of OSA is an important consideration for PAP and mask device designers. Air teaks through the mask device, which typically occur at the edge seals of the full face type masks, can generate annoying noise which can wake the patient or his or her sleeping partner. When using an automatic self-adjusting PAP type device, these air leaks through the edge seals of the mask will typically cause the device to automatically self-adjust to a higher air delivery pressure output to compensate for the leakage and pressure reduction. The use of the CD device can result in a barrier provided against the side seals of the full face mask and can help prevent these unwanted air leaks which can be annoying and cause an unwanted increase in the pressure output of the PAP type device.
Therefore, another important object of the use of this invention is to reduce the air leakage of the side seals of a full face mask during the use of a PAP type device by arranging or positioning the invention to make contact with or to reinforce those seals, thereby helping to keep those seals snug against the front sides of the cheeks, and/or serving as a barrier to prevent those seats from being displaced outward and producing unwanted leakage of air from the mask.
Another object of the CD device is to provide an inexpensive, easy to manufacture means to prevent significant cheek motion in many different activities including but not limited to recreation or during the use of a PAP type devices.
Another object of the invention is to provide a relatively inexpensive, easy to manufacture, easy to wear and use device which can be made integral to a PAP type device mask, chin strap or headgear, or easily installed on a headgear or chin strap for use with a PAP type device, or which can be made to he a free standing support structure similar to a pair of ear phones but positioned at the approximate center of the cheeks for many different uses, thereby providing a useful invention in many different forms which are simple and cheap to manufacture, thereby contributing to less expensive manufacturing in order to reduce carbon emissions that would otherwise be higher.
Another object of the present invention is a CD that depresses the cheek at the target area to minimize or prevent an air accumulator effect within the oral pharygeal cavity in order to enhance breathing without abrading, bruising or harming the inner cheek, gums, or teeth, especially when using a PAP type unit or engaging in activities which involve hard exhalation, thereby keeping the volume of the oral pharyngeal cavity minimal during respiration, especially during exhalation which would otherwise displace the cheeks outward and expand the oral pharygeal cavity.
Other purposes will appear in the ensuing specification, drawings and claims. The foregoing has outlined rather broadly the features and technical advantages of the present invention in order that the detailed description of the invention that follows may be better understood. Additional features and advantages of the invention will be described hereinafter which form the subject of the claims of the invention. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the invention as set forth in the appended claims. The novel features which are believed to be characteristic of the invention, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present invention.
Referring to
As shown in
As shown in
Spring yoke 104 can be made in several different sizes such as small, medium, large, and extra large to accommodate different users with different sized heads, or can have telescoping adjustment means built into the lower ends of each side or anywhere on each side or at the top (not shown). Spring yoke 104 is provided with a knob 110 on each side, and the knobs 110 are for retaining a strap 112, which is shown in
CD assembly 100 is arranged and positioned on the head of a user as shown in
CD assembly 100 can be manufactured in many different configurations to fit the personal preference of different individual users. It can have a spring yoke configured and constructed which will allow it to be placed under the chin, or around the neck in back, or even placed in front of the head, above or below the nose. It can be constructed to contain ear phones for audio, enabling the user to listen to a radio, iPod or cell phone while using the CD assembly such as the type of CD assembly 100. In addition, a yoke can be constructed of a rigid material which holds its approximate form even when worn, and the spring action for asserting pressure against the target area can be supplied by the compressibility of the pad such as pad 102 or a spring system inside or behind it. The pad can be constructed in a larger combination form such as shown in
Of course, if the pair of pads 102 is provided with double sided medical grade adhesive or tape, then even more stability can be provided to CD assembly 100. If the CD assembly 100 is carefully fit with suitable pressure applied at pad 106 and suitable pressure applied at the bilateral pair of target areas of the cheeks of the user, then it is possible to construct CD assembly 100 without use of any strap(s) such as strap 112. Pad 102 itself can be constructed of a compressible foam plastic or rubber like material with rebound memory that can be arranged to exert sufficient and desired depression of the target area if a rigid yoke structure is utilized to provide support for the pair of pads used such as pad 102.
Spring yoke 104 can be shaped to provide some upward force from the horizontal to the target area, less than that applied horizontally to the target area In this embodiment an upward angle of about 35 degrees from the horizontal was used to vector the upward force into the target area. Other angles could be used including up to a vertical force, and this capability could be manufactured into the CD depressor assembly 100 allowing easy adjustment by the user. It was determined by the inventor during experimentation that CD assembly 100 works somewhat more effectively in some individuals when there is some upward angular force applied to the target area to press snugly against the lower end of the zygomatic bone and the lower side of the lower lateral pterygoid process bone while exerting slight inward pressure against the upper portion of the maxilla bone. These pressures should be sufficient to depress the target area of the cheek suitably, and also for optimal effectiveness can have some of the force applied at an upward inward angle from the horizontal, which can provide more enhancement of breathing in some, all without abrading, bruising or harming the inner side of the cheek, the gums or the teeth.
Spring yoke 104 is strong enough to assert adequate pressure to each of the bilaterally positioned pads 102 to keep the target area suitably and adequately depressed without abrading, bruising or harming the array of upper teeth, gums or inner cheek. In one embodiment, a force of approximately 1.20 lbs was applied through each pad 102. However individual needs can vary and adjustments can be designed, manufactured and incorporated into the finished product which will allow pressure to be adjusted to an increase or to a decrease within a fairly broad range, generally within 0.5 lb to 3 lbs, but individual cases could require less or more. Pad 106 can also be supplied in different thicknesses and hardnesses, if suitable means for adjusting length are not provided to CD assembly 100. In addition telescoping means can be provided to the top of spring yoke 104 to increase or decrease the pressure applied to each of the pair of pads 102.
CD assembly 100 is designed as a freestanding unit which can be used alone or with many mask assemblies for PAP usage. CD assembly 100 can be used alone to enhance breathing and respiration during exercise or sports, or anytime based on the personal preference of the user. It may also be helpful for some who play exhalation powered musical instruments by enhancing exhalation when it is used with the small pad shown in
When CD assembly is properly arranged and positioned such that the pair of pads 102 are suitably depressing the target area bilaterally on the cheeks and strap 112 is properly arranged and positioned to retain CD assembly 100 in proper position, breathing and respiration can be enhanced. The suitable and effective depression of the target area of the user's cheek enhances respiration in a significant number of individuals perhaps by neurological or neuromuscular stimulation means.
A sustained and significant pressure to the target area appears to directly enhance inhalation as well as exhalation somewhat, even without depressing the approximate center of the cheek. And in addition, it was determined that if some pressure was applied to the target area in an upward angle from the horizontal, there was an additional enhancement of breathing in some individuals. CD assembly 100, when properly arranged and positioned, may enhance breathing and respiration during normal sleeping in some individuals, even those without Obstructive Sleep Apnea (OSA) or any diagnosable sleep disorder.
Sustained pressure provided to the cheek area right below the zygomatic bone can enhance breathing and respiration in some individuals. Thus the proper arranging and positioning of CD assembly can enhance breathing and respiration, and when the CD is applied to the approximate center of the cheek it can significantly reduce or substantially eliminate an air accumulator effect which can reduce the effectiveness of one's usage of a PAP device, it should be noted that sustained pressure to the cheek area just below the zygomatic bone appears to enhance breathing and respiration perhaps by neurological and/or neuromuscular stimulation.
For a significant number of individuals, sustained pressure properly applied to the target area can serve to enhance breathing and respiration as long as the sustained. pressure is applied to this area in an amount great enough to depress this area of the cheek deeply but not too great to abrade the inner cheek, or bruise the upper gums or harm the upper array of teeth. The amount of pressure needed to attain this for any given individual can vary and that must be kept in mind, and different thicknesses of pads can be made available if necessary or pads can be provided with different rebound rates.
The suitable depression of the target area by applied, sustained pressure can be attained by various structures represented in the illustrations or their equivalents, or in the structures disclosed but not shown specifically. For a significant number of individuals it is the sustained and focused application of pressure to this area of convergence of the lower lateral pterygoid process bone, the maxilla. bone and the zygomatic bone which allows the user to attain the maximum enhancement of breathing whether or not a particular embodiment disclosed, or an equivalent of that, depresses the approximate center of the cheek. For example if a Cheek Depressor is to be used during the use of a PAP type device or while playing an exhalation powered musical instrument, or while engaging in heavy exercise with a lot of movement and high exertion, a significant number of individuals will benefit from using an embodiment that emphasizes and focuses pressure to depress the target area of the cheek in addition to depressing the approximate center of the cheek. And for other situations where exercise is light, or there is no exercise involved, use of the Cheek Depressor in a free standing embodiment is an appropriate choice and will enhance breathing for a significant number of individuals. If an individual is engaging in an activity which requires and produces hard exhalation such as running or heavy exertion sports or playing an exhalation powered musical instrument, then it would be a good choice to use a Cheek Depressor embodiment which depresses the approximate center of the cheek and also focuses specific pressure on the target area.
In order to put on or remove football helmet assembly 10, the user must pull springs 14 apart to move pad assembly 16 outward away from shell 12, after which the springs 14 can be slowly released once the helmet is donned. During hard shocks spring 14 will be able to flex somewhat thereby adjusting to the exact temporary position of the users face and head inside football helmet assembly 10. The simultaneous depression of the target area and the approximate center of each cheek can provide enhanced breathing.
A helmet assembly can be constructed with an integral cheek depressor in a variety of alternate ways. For example, a rigid plate which is shaped approximate to the size of the intended cheek depressor can be attached to the lower front edge of each side of the helmet closest to the chin of the user and this plate can be attached by use of a spring hinge which will apply the desired pressure to the specific pad design and size. A smaller plate may be used to hold a pad intended to depress the target area only, or a larger plate may be used to hold a pad. intended to depress the target area of the cheek and also the approximate center of the cheek. A combination pad assembly comprised of a hard pad and a soft more compressible pad may also be used.
Spring 52 is provided with a pad 54 which is substantially firm and is molded, such as with a medical grade silicone compound. Pad 54 has a slight convex shape to its inner surface which faces the user.
Football helmet assembly 50 of
Spring frame 74 and spring leg 76 in this embodiment are constructed of a spring material, such as stainless steel, which will hold its shape and exert generally constant pressure inwardly thereby directing forces into the target area of the user. Portions of cap assembly 70 may be constructed of fabric, such as a heavy duty cotton/polyester weave. The pair of spring legs 76 have pads 72 affixed to each end. Pads may be constructed of molded medical grade silicone. The inner surface (facing user) of pads 72 is somewhat rounded or convex. Spring leg 76 can be curved inward at its lower section in such a way that pad 72 can be arranged and positioned to provide a somewhat angular upward force against the target area of the cheek in addition to an approximately horizontal force applied inward against the target region. In some users a slight upward angle to the force applied provides somewhat better breathing than a straight horizontally applied force. Double sided medical grade tape tabs can be constructed of the proper size and applied to the cheek side surface of pads 72 to help keep pads 72 in proper position during vigorous exercise.
Stainless steel alloy is a reasonable choice for compactness, durability and rebound memory and is selected for this embodiment, but many other materials could be used to construct spring frame 74 and spring leg 76 including other types of metals, plastics or composites providing higher strength, better rebound memory and light weight. Spring frame 74 is preferably constructed of a spring type material with good rebound memory, but it is also possible to construct frame 74 of a mostly rigid material and provide compressible pads with rebound memory instead. Spring legs 76 may be provided with a telescoping adjustment means.
A cap can also be constructed to include larger cheek depressors targeted to the target area in order to decrease an air accumulator effect which may occur during hard respiration of some when they engage in vigorous exercise involving maximum exertion and hard respiration. For some a larger cheek pad may provide more optimal breathing than a smaller one. In order to provide for a larger pad 72 or increased three for pad 72 against the target area of the user's cheek, a stronger spring leg 76 can be used to provide more spring force inward.
In order to don cap assembly 70, a user spreads apart the spring legs 76, places the cap in proper wearing position, and then releases the pair of spring legs 76, allowing the pair of pads 72 to move inwardly to press snuggly and depress into the target area of each cheek. Legs 76 can be adjusted by increasing or decreasing their length by use of the telescoping feature built into each leg 76 (not shown but understood in the art) if necessary for good contact between the pad 72, and the target area of the cheek. A double sided medical grade tape tab can be applied to the inner surface of each of the pair of pads 72, which in addition to the tension provided by spring leg 76 will help keep pad 72 in proper position during hard or jarring exercise and will help keep the cap in place. The double sided tape tabs are disposable and can be replaced at each use of the hat or as frequently as desired by the user.
Ear protector cavity 86 is provided with a spring 90 to which pad 89 is provided to its inward facing side toward the user's face, Pad 89 is molded of medical grade silicone which can feel sticky to the touch when cleaned with soapy water, Pad 89 is somewhat convex at its inner side which faces the cheek and has no sharp edges. Spring 90 is comprised in this instance of a high quality stainless steel which provides good strength and rebound memory while providing adequate force against pad 89 to depress the target area of the cheek of the user,
As shown in
As shown in
Mask assembly 202 is a full mask type assembly of the type typically used in PAP type therapy and has a flexible silicone seal 204, with said seal fitted against the face of the user to prevent significant air leakage while air is being delivered under pressure by a PAP type unit to mask assembly 202. Mask assembly 202 has an attachable and removable headgear assembly 206 connected to it. Headgear assembly 206 has an integral lower headgear strap 208 which is arranged and positioned to pass through and be restrained in headgear strap channel 209 wherein pad 200 is positioned to permit such an arrangement and positioning of lower headgear strap 208 across top plate 210 and into and through headgear strap channel 212 (shown in
As shown in
The use of a pre-molded integral cheek depressor such as CD assembly 300 of
The CD assembly 300 of
Pad center 304 provides for depressing the cheek effectively and keeping it depressed while, for example, a PAP type unit is operated without causing abrading, bruising or damage to the cheek, gums or upper or lower jaw. CD assembly 300 has a headgear strap retainer 316 and a headgear strap retainer 318 also molded integral to it, thus providing a headgear strap channel 320 for a lower headgear strap 208 of
Other embodiments of a cheek depressor may include semi-spherical elements that are coupled to one or more straps of a PAP mask. The semi-spherical elements may include portions of different compressibility to improve fit or efficacy of the cheek depressor. The semi-spherical cheek depressors can be solid or liquid filled.
CD assembly 300 can be custom molded to an impression taken of the face using any of a number of available means, including but not limited to compressible foam plastic non rebounding molding such as that used for making impressions of the bottom side of the foot by orthotic technicians and podiatrists. CD assembly 300 can alternatively be pre molded in several distinct prearranged standard sizes thus allowing the individual selection of a pre-molded CD assembly 300 at the time of fitting to avoid any waiting times for a custom molded order. Either method, premade standard sizes or a custom molded method, can provide for a very good and very comfortable fit without much compression of the pad 312 needed, thus allowing pad perimeter 302 and pad center 304 to be thinner than otherwise possible. And it is also possible to pre-mold and/or construct pad 312 in different stiffnesses, such as a somewhat thinner stiffer pad perimeter 302 and a thicker, softer, somewhat more compressible pad center 304 in order to provide pad center 304 with a mildly compressible but thicker foam for maximum comfort at the cheek when it is depressed.
The actual CDs can be made very compact for easy application to use by musicians or those engaging in various sports, organized and individual, which may include exercising, jogging or swimming. This embodiment can be custom made to provide a very compact streamlined fit and still be able to enhance exhalation for musicians or respiration in general for those engaging in physical exercise. The CD assembly of this embodiment may prove over time to be useful in various professional and amateur sports as an enhancement to conditioning and performance. This embodiment of the CD assembly offers great flexibility for a wide variety of applications, medical and non medical including but not limited to individual and team sports, the playing of musical instruments powered by exhalation and other uses which will utilize the benefits of enhanced inhalation and/or exhalation. For some individual users, the CD assembly must not necessarily be placed at the approximate center of each cheek to attain a benefit of enhanced inhalation and/or exhalation. For example some individuals seem to respond well when the CD assembly is placed at the upper part of the cheeks and the pads are of smaller size.
Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps.
This application claims the benefit of U.S. application Ser. No. 12/945,826, filed Nov. 12, 2010, which claimed the benefit of U.S. Provisional Application No, 61/260,682, filed Nov. 12, 2009, and each application being incorporated herein by reference.