Abstract: A heat exchanger for use in an outdoor environment with a heat pump system is provided. The heat exchanger includes a first set of tubes arranged in a parallel flow manner between a first manifold and a second manifold, wherein central straight portions of adjacent tubes are disposed with a space therebetween along each tube of the first set of tube between the first and second manifolds. A second set of tubes are arranged in a parallel flow manner between a third manifold and a fourth manifold, wherein central straight portions of adjacent tubes within the second set of tubes are at least partially disposed within the space between adjacent tubes of the first set of tubes. A fluid that flows through the first set of tubes additionally flows through the second set of tubes before the fluid returns to again flow through the first set of tubes.

Abstract: Individual four-sided shaped modules used in an assembly for underground storage of storm water and other fluid storage needs. Modules are assembled into a resultant four-sided tiling shape for maximized structural strength and material use efficiency. Internal four-sided shaped modules are assembled and encased by external four-sided shaped modules. Internal adjacent modules are in direct fluid communications with one another through a channel-less chamber. Internal four-sided shaped modules drain into four-sided shaped modules chamber where fluid is either stored or drained. Assemblies include various top and side pieces along with access ports for entry into said assembly.

Abstract: An intravascular catheter for peri-vascular and/or peri-urethral tissue ablation includes multiple needles advanced through supported guide tubes which expand around a central axis to engage the interior surface of the wall of the renal artery or other vessel of a human body allowing the injection an ablative fluid for ablating tissue, and/or nerve fibers in the outer layer or deep to the outer layer of the vessel, or in prostatic tissue. The system may also include a means to limit and/or adjust the depth of penetration of the ablative fluid into and beyond the tissue of the vessel wall. The catheter may also include structures which provide radial and/or lateral support to the guide tubes so that the guide tubes expand uniformly and maintain their position against the interior surface of the vessel wall as the sharpened injection needles are advanced to penetrate into the vessel wall.

Abstract: Described herein are poloxamer compositions for use as a shear protectant in cell culture and methods for preparing and using such compositions.

Abstract: A spacer device for incorporation into a bent-tube heat exchanger that includes a spine and a plurality of fingers that protrude from one side of the spine. The number of fingers in the spacer device is less than the number of tubes that are folded in a region to form the bent-tube heat exchanger. The plurality of fingers are configured to exert a force against the tubes and to provide and maintain a separation between the tubes in the folded region. A heat exchanger that includes the spacer device may also include a coating on the tubes in the folded region in order to reduce corrosion and increase the life-time of the heat exchanger. The method of forming the heat exchanger includes placing the spacer device between the tubes, such that the fingers lay on the tubes in the region to be folded and assist in the folding process.

Abstract: A heat exchanger has an upper manifold with a first curved section; a lower manifold spaced from and extending parallel to the upper manifold and having a second curved section; a plurality of refrigerant tubes, and a plurality of corrugated fins. Each corrugated fin is formed by a strip having radiused portions alternating with planar portions, and the radiused portions are in contact with the respective adjacent refrigerant tubes. Each of the fins has a curve-inner edge and a curve outer edge and at least one edge of the curve-inner edge and the curve outer edge of at least one fin has a recessed portion in the planar portions that is recessed inward toward a center of the core.

Abstract: A heat exchanger (1) for a motor vehicle (2), has first flat tubes (3) with a first longitudinal end (4) received in associated first openings (5) of a first collector (6) and with an opposite second longitudinal end (7) in associated second openings (8) of a second collector (9). Second flat tubes (10) have a first longitudinal end (11) received in associated third openings (12) of a third collector (13) and a second longitudinal end (15) in associated fourth openings (16) of the second collector (9). Only the first flat tubes (3) or both the first and second flat tubes (3, 10) have an angled end region (14). The second and fourth openings (8, 16) are arranged spaced apart from one another with heat transfer fins (18) in between.

Abstract: A flat tube for a heat exchanger has a tube body with an outer top and an outer bottom surface arranged opposite one another at a thickness of the tube body and two outer side surfaces arranged opposite one another at a width of the tube body and connecting the outer top and bottom surfaces. The tube body has a heat exchange portion extending along an extension direction, an angled portion extending along an transverse direction inclined relative to the extension direction, and a bent portion connecting the heat exchange portion to the angled portion. The angled portion is arranged at a distance from the heat exchange portion in an offset direction. The bent portion has a first end region facing the heat exchange portion with a first bend counter to the offset direction and a second end region facing the angled portion with a second bend in the offset direction.

Abstract: A heat exchanger has an upper manifold with a first curved section; a lower manifold spaced from and extending parallel to the upper manifold and having a second curved section; a plurality of refrigerant tubes, and a plurality of corrugated fins. Each corrugated fin is formed by a strip having radiused portions alternating with planar portions, and the radiused portions are in contact with the respective adjacent refrigerant tubes. Each of the fins has a curve-inner edge and a curve outer edge and at least one edge of the curve-inner edge and the curve outer edge of at least one fin has a recessed portion in the planar portions that is recessed inward toward a center of the core.

Abstract: A heat exchanger has an upper manifold with a first curved section; a lower manifold spaced from and extending parallel to the upper manifold and having a second curved section; a plurality of refrigerant tubes, and a plurality of corrugated fins. Each corrugated fin is formed by a strip having radiused portions alternating with planar portions, and the radiused portions are in contact with the respective adjacent refrigerant tubes. Each of the fins has a curve-inner edge and a curve outer edge and at least one edge of the curve-inner edge and the curve outer edge of at least one fin has a recessed portion in the planar portions that is recessed inward toward a center of the core.

Abstract: A near field radio-frequency identification (“RFID”) probe includes a probe tip comprising a resonant coil configured to communicate with an RFID compatible device at a predetermined resonant frequency. The near field RFID probe further includes a plurality of switch capacitor networks each comprising a capacitor and an RF switch, wherein switching the plurality of switch capacitor networks changes the capacitance of the resonant coil, thereby changing the resonant frequency of the resonant coil. The near field RFID probe further includes a probe control module configured to adjust the resonant frequency of the resonant coil to maintain the predetermined resonant frequency by switching the switch capacitor networks responsive to detecting that the resonant frequency of the resonant coil has deviated from the predetermined resonant frequency.

Abstract: A near field radio-frequency identification (“RFID”) probe includes a probe tip comprising a resonant coil configured to communicate with an RFID compatible device at a predetermined resonant frequency. The near field RFID probe further includes a plurality of switch capacitor networks each comprising a capacitor and an RF switch, wherein switching the plurality of switch capacitor networks changes the capacitance of the resonant coil, thereby changing the resonant frequency of the resonant coil. The near field RFID probe further includes a probe control module configured to adjust the resonant frequency of the resonant coil to maintain the predetermined resonant frequency by switching the switch capacitor networks responsive to detecting that the resonant frequency of the resonant coil has deviated from the predetermined resonant frequency.

Abstract: A near field radio-frequency identification (“RFID”) probe includes a probe tip comprising a resonant coil configured to communicate with an RFID compatible device at a predetermined resonant frequency. The near field RFID probe further includes a plurality of switch capacitor networks each comprising a capacitor and an RF switch, wherein switching the plurality of switch capacitor networks changes the capacitance of the resonant coil, thereby changing the resonant frequency of the resonant coil. The near field RFID probe further includes a probe control module configured to adjust the resonant frequency of the resonant coil to maintain the predetermined resonant frequency by switching the switch capacitor networks responsive to detecting that the resonant frequency of the resonant coil has deviated from the predetermined resonant frequency.

Abstract: An amplification system can include a bias booster circuit and an amplifier that amplifies an input signal to drive a load. The bias boosting circuit can include a negative bias booster that applies a charge to an input node of the amplifier in response to a negative half-cycle of the input signal that exceeds a boost threshold level. The bias boosting circuit can also include a positive bias booster that discharges the input node of the amplifier during a positive half-cycle of the input signal that exceeds the boost threshold level. The discharging by the positive bias booster is slower than the charging by the negative bias booster to induce a bias voltage increase from a quiescent bias voltage on the input node of the amplifier.

Abstract: An amplification system can include a bias booster circuit and an amplifier that amplifies an input signal to drive a load. The bias boosting circuit can include a negative bias booster that applies a charge to an input node of the amplifier in response to a negative half-cycle of the input signal that exceeds a boost threshold level. The bias boosting circuit can also include a positive bias booster that discharges the input node of the amplifier during a positive half-cycle of the input signal that exceeds the boost threshold level. The discharging by the positive bias booster is slower than the charging by the negative bias booster to induce a bias voltage increase from a quiescent bias voltage on the input node of the amplifier.

Abstract: Various diaphragm valves and accessories therefore are disclosed herein which improve on existing diaphragm valves and accessories and overcome many of the shortcomings of same. Related methods to these valves and accessories and/or their manufacture, assembly or use are also disclosed.

Abstract: Embodiments of the invention provide methods, apparatus, and articles of manufacture for editing network parts present a computer-aided design (CAD) model of a utility network using grips. The network parts may represent elements present in a real-world utility network. Among others, the grips may include a part size grip and a structure rotation grip. When a user selects a part size grip, a graphical user interface may display hash marks to indicate a variety of sizes of the network part provided by a network parts catalog. Dragging the resize grip may cause it to jump from one hash mark to the next, allowing the user to easily select one of the available part sizes. A structure rotation grip may be used to rotate a network part representing a utility network structure about an asymmetric axis.

Abstract: Embodiments of the invention provide methods, apparatus, and articles of manufacture for editing network parts present a computer-aided design (CAD) model of a utility network using grips. The network parts may represent elements present in a real-world utility network. Among others, the grips may include a part size grip and a structure rotation grip. When a user selects a part size grip, a graphical user interface may display hash marks to indicate a variety of sizes of the network part provided by a network parts catalog. Dragging the resize grip may cause it to jump from one hash mark to the next, allowing the user to easily select one of the available part sizes. A structure rotation grip may be used to rotate a network part representing a utility network structure about an asymmetric axis.

Abstract: A condenser for an air conditioning system includes a receiver integrally formed with a second, or return, header which is in fluid communication with a second, or sub-cooling, group of tubes. A conduit extends between entry and discharge ends both of which are completely enclosed within the interior of the receiver. The conduit transports a refrigerant fluid in an upflow direction within the interior of the receiver and through a second fluid port located adjacent the discharge end of the conduit for directing the fluid into and through the return header to the sub-cooling group of tubes.

Abstract: A fabricated, B type heat exchanger tube is folded with a distinctive internal enclosed seam of substantially triangular cross section, with an enlarged cross sectional area and longer, sharper corners. The uniquely shaped internal seam prevents liquid braze material from bridging and filling the cross sectional area of the seam, and thereby causes a lengthwise, erosive flow of braze material to move along the internal seam, rather than along the external seam.