摘要:
An implantable medical device (“IMD”) configured in accordance with an example embodiment of the invention generally includes a housing, a connector header block coupled to the housing, a dielectric sheath located around at least a portion of the housing and/or around at least a portion of the header block, and a telemetry antenna located within the dielectric sheath. The antenna is configured to support far field telemetry with an external device such as a programmer. In one example embodiment, the antenna is configured as a balanced antenna having two separate antenna elements driven 180 degrees out of phase. Each of the antenna elements has a feed point on a perimeter edge of the IMD housing and a floating endpoint. A number of alternate embodiments are also provided.
摘要:
An implantable medical device (“IMD”) configured in accordance with an example embodiment of the invention generally includes a housing, a connector header block coupled to the housing, and a telemetry antenna located within the header block. The header block is formed from a dielectric material, which encapsulates the antenna. The antenna is configured to support far field telemetry with an external device such as a programmer. In one example embodiment, the antenna is formed from a thin round wire, has a feed point on the top perimeter sidewall of the housing, and has a floating endpoint in the header block. The antenna is contoured to form a simple curve in a plane that is approximately parallel with the major sides of the housing.
摘要:
A radar system includes at least one transmit array comprising a plurality of metamaterial elements. The radar system further includes at least one near-field stimulator for inputting electromagnetic signal to the transmit array so that a sub-wavelength target is illuminated with an electromagnetic wave.
摘要:
Vibration or acoustic sound control is achieved using an elastic layer of thermal or insulation material in which a plurality of discrete masses are distributed throughout. The elastic layer may be installed as a pre-formed layer, or be blown into position within a structure where vibration or acoustic sound control is required.
摘要:
A heat exchanger assembly includes a core having first and second header tanks covered by tank caps. A pair of core reinforcing members presenting terminal ends extend between the first and second header tanks. A least one tab and an opening for receiving the tab are used for connecting the core reinforcing members to the tank caps.
摘要:
An antenna array includes at least one transmit array comprising a plurality of metamaterial elements. The antenna array further includes at least one near-field stimulator for inputting electromagnetic signal to the transmit array so that a sub-wavelength target is illuminated with an electromagnetic wave.
摘要:
The active/passive absorber for extended vibration and sound radiation control includes principally two layers. The first layer has a low stiffness per unit area which allows motion in the direction perpendicular to its main plane. The second layer is principally a mass layer. These two combined layers have a frequency of resonance close to one of the main structure. The dynamic behavior of the coupled system makes the active/passive absorber a passive absorber; however, the first layer can be electrically actuated to induce motion in the direction perpendicular to its main plane. This addition property induces and/or changes the motion of the mass layer and therefore improves the dynamic properties of the active/passive absorber system. The active/passive absorber can have multiple mass layers and multiple elastic layers stacked one on top of the other. In addition, the mass layers can be continuous or discretized, and have varying thicknesses and shapes for sections and/or segments in the mass layer.
摘要:
A condenser for an air conditioning system includes a core assembly having a header tank and a receiver/dehydrator member operably connected to the core assembly for condensing a refrigerant flowing internally. The receiver/dehydrator or receiver member includes two openings to receive male couplers extending from a tubular member connected to the core assembly. The condenser includes a coupler that extends into the receiver/dehydrator member between each opening and the male couplers to form a seal therebetween. The coupler and the male coupler are connected one with the other by brazing. In an alternative embodiment, the male coupler includes a snap-in element to engage the male coupler with the coupler.
摘要:
A novel, one-way nut fastener including a nut body with a side wall that is internally threaded and lobes that extend from the side wall of the nut body. Each lobe has a flat portion that extends substantially radially away from the side wall and a curved portion that extends from the flat portion to the flat portion of an adjacent lobe. A special tool uses the leverage that is gained from the flat portions of the lobes to tighten the cap threads onto the threads of a stem portion. Since the leverage gained from the lobes, which is used to tighten the nut fastener, cannot be used to loosen the fastener, it is much more difficult to remove the nut fastener.
摘要:
A table/easel that includes a worksurface having an erasable surface, at least one first leg pivotally coupled to the worksurface, and at least one second leg pivotally coupled to the worksurface. The table/easel further includes a first pivot block and a second pivot block interconnecting the first and second legs in a scissor-like arrangement. The first and second pivot blocks are slidably coupled to the first and second legs. The first and second leg can be slidably adjusted with respect to the first and second pivot blocks, thereby allowing infinite adjustability of the worksurface between a substantially horizontal position and a substantially vertical position.