Patent number 8603032 is assigned to
The following quote was obtained by the news editors from the background information supplied by the inventors: "Portable medical devices are useful for patients that have conditions that must be monitored on a continuous or frequent basis. For example, diabetics are usually required to modify and monitor their daily lifestyle to keep their body in balance, in particular, their blood glucose (BG) levels. Individuals with Type 1 diabetes and some individuals with Type 2 diabetes use insulin to control their BG levels. To do so, diabetics routinely keep strict schedules, including ingesting timely nutritious meals, partaking in exercise, monitoring BG levels daily, and adjusting and administering insulin dosages accordingly.
"The prior art includes a number of fluid infusion devices and insulin pump systems that are designed to deliver accurate and measured doses of insulin via infusion sets (an infusion set delivers the insulin through a small diameter tube that terminates at, e.g., a cannula inserted under the patient's skin) In lieu of a syringe, the patient can simply activate the insulin pump to administer an insulin bolus as needed, for example, in response to the patient's current BG level.
"A typical infusion pump includes a housing, which encloses a pump drive system, a fluid containment assembly, an electronics system, and a power supply. The pump drive system typically includes a small motor (DC, stepper, solenoid, or other varieties) and drive train components such as gears, screws, and levers that convert rotational motor motion to a translational displacement of a stopper in a reservoir. The fluid containment assembly typically includes the reservoir with the stopper, tubing, and a catheter or infusion set to create a fluid path for carrying medication from the reservoir to the body of a user. The electronics system regulates power from the power supply to the motor. The electronics system may include programmable controls to operate the motor continuously or at periodic intervals to obtain a closely controlled and accurate delivery of the medication over an extended period.
"Personal medical devices such as infusion pumps are typically powered by a battery or battery pack. For example, some medical devices can be powered by a single AA battery. The portable nature of such devices means that they might be subjected to physical impact, shock, or stress (which may result from physical activity of the user, accidental bumping into nearby objects, dropping of the device, etc.). The force imparted by a battery to the housing of a portable medical device could compromise the integrity of the housing and/or disturb the delicate operating components inside the housing. Accordingly, it is desirable to have a feature or component that protects the battery, the housing, and/or other elements of a medical device from battery impacts.
"A number of electronic devices, including personal medical devices such as infusion pumps, include membrane keypad assemblies that allow the user to manipulate certain functions of the devices. Conventional membrane keypad assemblies usually include an underlying keypad layer and an overlying actuator layer. The bottom surface of the actuator layer is typically printed with graphics associated with the different keys or buttons and/or with decorative graphics. The actuator layer is usually attached to the keypad layer or the housing of the device using an adhesive or bonding material. Ideally, the actuator layer is sealed around the housing such that moisture and contaminants cannot enter the housing. Indeed, some personal medical devices are designed to be water resistant (to accommodate bathing, swimming, exposure to rain, etc.) and, for such devices, the actuator layer forms a water resistant seal with the housing. In this regard, it is desirable to have a membrane keypad assembly that exhibits strong, robust, and reliable water resistant characteristics.
"Many electronic devices, including personal medical devices such as infusion pumps, use piezoelectric speakers to generate sound. If the device is waterproof or water resistant, then a piezoelectric speaker will typically be mounted against the inner wall of the housing for purposes of transmitting sound to the outside world. For such implementations, the volume of sound produced by the piezoelectric speaker will be influenced by various factors such as the shape, size, and structural features of the housing. If a piezoelectric speaker is mounted directly to a rigid case or housing of a device, however, it will not effectively or efficiently generate sound at the desired volume. Accordingly, it is desirable to have a piezoelectric speaker assembly that operates effectively when mounted within a sealed rigid housing of an electronic device."
In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventors' summary information for this patent: "A shock absorbing element for a battery of a medical device is provided. The medical device includes a battery receptacle for the battery and an electrical contact for the battery. The electrical contact resides within the battery receptacle, and the shock absorbing element is composed of a resilient material. The shock absorbing element includes: a perimeter sized and shaped to accommodate placement in the battery receptacle; a through hole formed in the resilient material, the through hole being sized and shaped to accommodate the electrical contact; a first side; a second side; and shock absorbing features formed on the first side or the second side to dissipate kinetic energy associated with motion of the battery relative to the battery receptacle.
"Also provided is a shock absorbing assembly for a battery of a medical device. The shock absorbing assembly includes: a battery sleeve to house the battery, the battery sleeve having a base end; an electrical contact for the battery, the electrical contact residing within the battery sleeve near the base end; and a shock absorbing element located within the battery sleeve near the base end, the shock absorbing element composed of a resilient material having shock absorbing features integrally formed therein to dissipate kinetic energy associated with motion of the battery toward the base end.
"A portable medical device is also provided. The portable medical device includes: a housing; a battery sleeve inside the housing, the battery sleeve having a base end, wherein the battery sleeve accommodates a battery for the portable medical device; a battery contact located inside the battery sleeve near the base end; and a resilient and compressive element located inside the battery sleeve near the base end, the battery contact protruding through the resilient and compressive element, wherein the resilient and compressive element dissipates kinetic energy associated with motion of the battery toward the base end.
"A medical device according to an embodiment is provided. The medical device includes: a housing having a front face, a keypad mounting area on the front face, and a sealing surface on the front face, the sealing surface surrounding the keypad mounting area; a membrane keypad assembly coupled to the keypad mounting area, the membrane keypad assembly comprising a plurality of actuation components integrated therein; a sealing element overlying the membrane keypad assembly and coupled to the sealing surface to form a fluid resistant seal with the housing; and a graphic keypad overlay adhered to the sealing element, the graphic keypad overlay comprising graphical representations corresponding to the actuation components.
"Also provided is a case assembly for a medical device. The case assembly includes: a plastic housing having a keypad mounting cavity and a sealing rim integrally formed therein, the sealing rim located outside and around the keypad mounting cavity; a membrane keypad assembly positioned in the keypad mounting cavity, the membrane keypad assembly comprising a plurality of actuation elements; and a plastic actuator layer overlying the membrane keypad assembly and comprising a plurality of protrusions corresponding to the actuation elements and further comprising a perimeter area that extends beyond the membrane keypad assembly. The perimeter area is attached to the sealing rim to form a fluid resistant seal between the plastic housing and the plastic actuator layer.
"A method of manufacturing a medical device is also provided. The method begins by providing a plastic housing having a keypad mounting area and a sealing rim positioned outside the keypad mounting area. The method continues by affixing a membrane keypad assembly on the keypad mounting area, the membrane keypad assembly comprising a plurality of actuation elements. The perimeter area of a plastic actuator layer is sealed to the sealing rim to form a fluid resistant seal between the plastic housing and the plastic actuator layer, wherein the plastic actuator layer overlies the membrane keypad assembly, and wherein protrusions formed on the plastic actuator layer are aligned with the actuation elements of the membrane keypad assembly.
"Another embodiment of a medical device is also provided. The medical device includes: a rigid housing having an interior surface; a piezoelectric speaker enclosed within the rigid housing, the piezoelectric speaker comprising an actuator that is controlled to generate sound during operation of the medical device; and an offset element located between the interior surface and the actuator. The offset element, the actuator, and the interior surface at least partially define a resonant cavity for the piezoelectric speaker.
"Also provided is a transducer assembly for a medical device having a rigid housing and a flat interior surface. The transducer assembly includes: a piezoelectric speaker comprising an actuator; and an offset element for the piezoelectric speaker. The offset element has an actuator side that mates with the piezoelectric speaker, a housing side that mates with the flat interior surface of the rigid housing, and an opening formed therein and extending from the actuator side to the housing side. The actuator side and the housing side are separated by an offset thickness, and the opening and the offset thickness at least partially define a resonant cavity for the piezoelectric speaker.
"An electronic assembly for a medical device is also provided. The electronic assembly includes: a carrier substrate; a piezoelectric speaker having a first major side and a second major side, the first major side coupled to the carrier substrate; and an offset ring coupled to the second major side of the piezoelectric speaker. The offset ring has an opening formed therein through which a portion of the second major side is exposed. The opening at least partially defines a resonant cavity for the piezoelectric speaker.
"This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter."
URL and more information on this patent, see: Cheney, II, Paul S.; Bazargan, Afshin; Nguyen, Andrew B.; Law, David. Medical Device with Membrane Keypad Sealing Element, and Related Manufacturing Method. U.S. Patent Number 8603032, filed
Keywords for this news article include: Proinsulin, Electronics, Peptide Hormones,
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