240 results about "Cylindrical channel" patented technology

A method and system for marking and guiding the insertion of securing members (e.g., pedicle screws) of a spinal fixation device. In one embodiment, the marking and guidance method and system includes the use of a guide tube configured to be inserted into a patient's back until a first end reaches an entry point on or near a vertebral bone of the patient's spinal column, wherein the guide tube includes a hollow cylindrical channel along its longitudinal center axis; a penetrating device configured to be positioned within the cylindrical channel of the guide tube and having a sharp tip configured to protrude outwardly from the first end of the guide tube so as to allow the first end of the guide tube to penetrate through the patient's back muscle and tissue and reach the vertebral bone at the entry point; a marking pin configured to be inserted through the cylindrical channel of the guide tube, after removal of the penetrating device, until a first end of the marking pin having a sharp tip reaches the entry point; and a pushing device configured to be inserted through the cylindrical channel of the guide tube and provide a driving force at a second end of the marking pin, opposite the first end, so as to drive and secure the first end of the marking pin into the vertebral bone, wherein the marking pin identifies the location of the entry point on the vertebral bone for subsequent implantation of a securing member of a spinal fixation device.

A bone screw assembly comprises a bone screw having a shaft and a head, a stabilizer retainer, a set screw, and a housing having a proximal opening, biased to one side, and a distal opening that open on an interior cavity. The stabilizer retainer has a cylindrical channel that receives a stabilizer. The retainer has flexible portions that allow passage of the stabilizer into the channel. An arcuate wall of the channel maintains contact with the stabilizer within the channel. The housing is adapted to receive the bone screw, the stabilizer retainer and the set screw in the interior cavity. The housing has a channel that permits passage of the stabilizer though the housing. The set screw is engaged in the distal opening. The set screw and stabilizer retainer engage and prevent movement of the flexible portions, preventing movement of the stabilizer from the stabilizer retainer.

A humidifier for treating humidified air with germicidal light is provided. The humidifier includes a water reservoir, an atomizer to atomize a supply of water, and an ultraviolet light source to expose the atomized water to germicidal light. The ultraviolet light source extends vertically within a cylindrical channel to irradiate the atomized water dissipating upwardly from the atomizer. The water reservoir can include a carbon filter and a hardness-removing module for removing containments and metal oxides from the water supply. A control panel indicates the remaining useful life of the ultraviolet light source, the carbon filter and the hardness-removing module based on historical humidifier usage and water quality levels.

A partially occluding ergonomic earbud adapter is formed from low durometer materials. The exterior of the adapter is frustoconical and tear-drop shaped and formed with several fluted recesses which set apart finger-like flanges extending from an open base toward the tip of the adapter. The ergonomic flanges grip the inside of the ear canal as a result of elastic restoring forces of the flanges against each other and against the ear canal to form an ergonomic seal partially occluding sound from the ear canal while providing isolation. The inside wall of the adapter is formed to enclose and secure the earphone in a parabolic concavity formed by an undercut rib at the base. The cavity is abutted by a cylindrical channel extending through the adapter to an orifice at the tip to deliver high fidelity audio into a user's ear canal from the headset or another audio listening device.

A self-aligned gated field emission device and an associated method of fabrication are described. The device includes a substrate and a porous layer disposed adjacent to the surface of the substrate, wherein the porous layer defines a plurality of substantially cylindrical channels, each of the plurality of substantially cylindrical channels aligned substantially parallel to one another and substantially perpendicular to the surface of the substrate. The device also includes a plurality of substantially rod-shaped structures disposed within at least a portion of the plurality of substantially cylindrical channels defined by the porous layer and adjacent to the surface of the substrate, wherein a portion of each of the plurality of substantially rod-shaped structures protrudes above the surface of the porous layer. The device further includes a gate dielectric layer disposed on the surface of the porous layer, wherein the gate dielectric layer is disposed between the plurality of substantially rod-shaped structures. The device still further includes a conductive layer selectively disposed on the surface of the gate dielectric layer, wherein the conductive layer is selectively disposed between the plurality of substantially rod-shaped structures.

A terminal for a coaxial cable includes an electrically conductive core mounted in a dielectric member. The dielectric member along with the conductive core are positioned within an electrically conductive ground shield. The ground shield includes two identical split-barrel housing members which are joined together. When joined, the housing members form a cylindrical channel having surfaces which intimately contact an exposed length of cable outer conductor layer, creating a conductive connection between the outer conductor layer and the ground shield and structurally maintaining the outer conductor layer concentric to the dielectric sheath and inner conductor of the cable.

A Ge and Si hybrid material inversion mode GAA (Gate-All-Around) CMOSFET includes a PMOS region having a first channel, an NMOS region having a second channel and a gate region. The first channel and the second channel have a circular-shaped cross section and are formed of n-type Ge and p-type Si, respectively; the surfaces of the first channel and the second channel are substantially surrounded by the gate region; a buried oxide layer is disposed between the PMOS region and the NMOS region and between the PMOS or NMOS region and the Si substrate to isolate them from one another. In an inversion mode, current flows through the overall cylindrical channel, so as to achieve high carrier mobility, reduce low-frequency noises, prevent polysilicon gate depletion and short channel effects and increase the threshold voltage of the device.

The invention discloses a double-thermoelectric power generation device for a solar water heater. The double-thermoelectric power generation device mainly comprises a solar heat water, a first thermoelectric power generation module, a second thermoelectric power generation module and a cold water circulating system, wherein a cylindrical channel is reserved at the center in a heat-insulating hot water tank of the solar heat water; the first thermoelectric power generation module having a cylindrical shape is mounted in the cylindrical channel; a cylindrical channel is also reserved at the center of the first thermoelectric power generation module; a first cold water pipe passes through the cylindrical channel at the center of the first thermoelectric power generation module; a first cold end face of the first thermoelectric power generation module is in contact with the first cold water pipe while a first hot end face is in contact with the hot water in the heat-insulating hot water tank; the second thermoelectric power generation module is arranged between the heat-insulating hot water tank and a cold water tank; a second cold end face of the second thermoelectric power generation module is in contact with the cold water tank while a second hot end face is in contact with the heat-insulating hot water tank; the heat-insulating hot water tank is connected with the cold water tank through a lower water pipe; the cold water tank is connected with a cold water source, a water pump and a heating radiator through the water pipe. The double-thermoelectric power generation device is capable of supplying hot water and generating electricity, is energy-saving and environment-friendly, is safe and high-efficient and is capable of effectively solving the problem of energy waste caused by hot water evaporation.

A hose clamp for repairing high pressure hydraulic hoses comprises a first clamp portion mated to a second clamp portion around a hose. The first and second clamp portions each comprise a semi-cylindrical channel extending longitudinally along an inner surface of the clamp. The hose is received within the channel and a plurality of fasteners releasably affix the clamp portions together. A plurality of barbs extending circumferentially around the channel compress the hose to minimize leakage from the hose.

The invention discloses a metal surface combustor and a gas premixing method thereof, solves the technical problem that the combustor can uniformly mix gas with combustion air in a shorter premixing channel, and belongs to the technical field of combustion of metal surface combustors. The metal surface combustor is characterized in that a metal throat is a cylindrical channel; the outer side surface is connected with a boiler front wall; one part extending into a hearth is an end-sealed microhole metal cylinder; the other end is connected with an air pipe as a whole; multiple gas spray guns and multiple cyclone blades are arranged at the tail end of the gas pipe in sequence; the gas uniformly enters the throat by spray holes in the gas spray guns and gas pipe holes in the gas pipes; meanwhile, the combustion air and the gas are hedged and uniformly mixed in the throat; and under stirring of the cyclone blades at the end part of the gas pipe, the uniform mixing is further accelerated, so that the mixing distance is shortened, the flame temperature nonuniformity caused by nonuniform gas mixing is effectively prevented, and the NOx emission is reduced.

A hinge is provided for connecting a swing door to an adjacent support structure. The hinge includes a first attachment structure for being mounted to either the door or the adjacent support structure and has a partially cylindrical channel defining a longitudinal pivot axis. A second attachment structure is mounted to the other of the door and adjacent support structure, and has a longitudinally extending mounting arm projecting into the partially cylindrical channel of the first attachment structure. A bushing (1) is mounted on the arm of the second attachment structure, (2) is disposed in the partially cylindrical channel of the first attachment structure, and (3) has a partially cylindrical exterior surface which (a) is defined around the pivot axis for engaging the partially cylindrical channel of the first attachment structure, and (b) has a surface hardness that is less than the surface hardness of the partially cylindrical channel.

A circular channel for spinning polyurethane fibers is composed of cylindrical channel, spinneret plate module, annular air blower, annular air inlet flow-regulator, annular air-returning flow-regulator, hot airflow inlet and hot airflow outlet. Its advantages are high airflow stability, distribution uniformity and spinning quality.

The wraparound flower planter includes two almost-identical semicylindrical members and releasable fasteners for securing the two members together so that the wraparound flower planter is maintained in a closed position around the base of a tree, or other columnar support. Each of the semicylindrical pot members has an open upper end, an open lower end, and a surrounding sidewall. A pair of diametrically opposed interior planar walls extend radially inward from the sidewall. A substantially semicylindrical inner wall coaxial with the sidewall extends between inner edges of the interior planar walls from the open upper end to the bottom edge of the interior planar walls, defining a cylindrical channel extending through the pot. A shelf extends between the sidewall and the inner wall, forming the floor of a generally U-shaped peripheral channel. The shelf has a plurality of drainage apertures disposed therethrough.

The invention provides a silicon-based wrap gate transistor with a buried-channel structure, and belongs to the field of electronic semiconductor devices. The transistor comprises a channel region, a gate medium, a gate region, a source region, a drain region and a source/drain terminal epitaxial region, wherein the channel region has a silicon nanowire structure with three layers, a cylindrical channel region lower layer is arranged inside the channel region, and the channel region and the channel region upper layer are wrapped outside the channel region lower layer respectively; impurities with opposite types are mixed into the channel region upper layer and the channel region lower layer; a layer of gate medium region is covered outside the channel region upper layer; and the gate region is positioned on the outer layer of the gate medium. In a preparation method, the silicon-based wrap gate transistor with the buried-channel structure which is suitable to be applied to high-speed circuits is prepared on the basis of an oxidizing dephlegmation technology, so that the phenomena of descending in mobility and serious random telegraph noise which are caused by the polycrystal orientation of wrap gate devices are avoided.

A valve assembly and a method of additively manufacturing the same are provided. The valve assembly includes a valve housing defining first and second mounting features, such as recessed dimples or protruding bumps, positioned on opposite sides of a substantially cylindrical channel to define a hinge axis. One or more valve flaps are positioned within the cylindrical channel, each valve flap including a hinge member extending along the hinge axis and defining two or more complementary features or coupling members for engaging either the mounting features of the valve housing or an adjacent hinge member.