4209 results about "Hollow cylinder" patented technology

The apparatus for production of mixtures from two components has a container for each and devices to combine the components in the mixing space and for extrusion of the mixture. The powdered component (4) is situated in the lower part of the inner space (21), which is sealed by a bottom (10). This carries a nozzle (2) with closure membrane (3). The inner space (21) is closed on the top by the lower wall (6) and the sliding seal (8). The liquid component (9) is situated in the inner space (18) of the inner hollow cylinder (5). This is closed on the top by the upper wall (11). The lower and upper wall (6) and (11) each have an opening with sealing lips (7) and (12) that are closed by parts of the mixing rod (15). A torus (20), a section with smaller diameter (19), a mixing disk (22), as well as a mandrel (24), are present on the lower part of the mixing rod (15).

An intervertebral implant is shaped in the form of a hollow cylinder and has a cover face, a base face, a hollow cylinder wall with an outer lateral area and an inner lateral area, as well as a hollow cylinder central axis. The implant is formed at least 95 percent by volume of a radiolucent material which has a modulus of elasticity of between 1 and 20 GPa. Postsurgical observation is permitted by means of X-rays, and at the same time the implant has a high degree of biocompatibility.

An endoscopic instrument has an external tube and a hollow cylinder coaxially extending along a longitudinal axis and actuatable to move axially in opposite directions to rotate a distal end of the instrument provided with an engaging element between angular positions. The distal end actuated by the outer tube is rotatable about a pin having an axis of rotation which is spaced radially from the longitudinal axis as another pin formed on and extending radially from the cylinder is guided along an arcuate groove provided on the distal end of the instrument.

A heat-dissipating structure for a LED lamp includes a heat-dissipating base, a heat-dissipating body and a plurality of heat pipes. The heat-dissipating body has an outer cylinder formed into a hollow cylinder. The inside surface of the outer cylinder is provided with a plurality of accommodating grooves. The condensed ends of the plurality of heat pipes are inserted into the accommodating grooves. The end to be heated of the heat pipe is adhered to the heat-dissipating base. Further, the inside surface and the outside surface of the outer cylinder are formed with a plurality of heat-dissipating fins made by aluminum extrusion, so that the heat pipes are encircled by the heat-dissipating fins. In this way, the heat can be conducted by the plurality of heat pipes so as to increase the total contacting area. Thus, the heat can be rapidly conducted to the outer cylinder. Further, the heat can be rapidly dissipated to the outside by the heat-dissipating fins, thereby to substantially increase the efficiency in the heat dissipation.

A jointed system for delivering a medical device to a target location within a human anatomy, comprising: a first segment that is a hollow cylinder, wherein a first flange and a second flange are attached to the distal end and extend distally away from the first segment; a second segment that is a hollow cylinder and has a proximal end and a distal end, wherein a third flange and a fourth flange are attached to the proximal end and extend proximally away from the second segment; a connector element having four cylindrical lugs extending radially away from a central point, wherein each lug passes, respectively, through a circular hole, and further wherein the connector element defines at least two separate openings extending in a direction from the distal end of the first segment to the proximal end of the second segment.

A lightweight engine-driven generator set including a stator having at least first and second windings (preferably three-phase) and a rotor having a soft magnetic core and a plurality of high energy product permanent magnets, separated by consequence poles, disposed proximate the stator such that relative motion of the rotor and stator causes magnetic flux from the rotor to interact with and induce current in the stator windings. The first winding includes a predetermined number of turns corresponding to a first predetermined voltage output; and the second winding includes a predetermined number of turns corresponding to a second predetermined voltage output, the respective windings being grouped together as a unit and wound about the core such that the respective winding coils are wound in continuous close thermal contact with each other. The first winding generates a relatively high voltage, low amperage signal, and the second winding generates a relatively low voltage, high amperage signal; and a switch provides for selection of the desired output. Preferably the rotor is a hollow cylinder mounted on the engine shaft for rotation about the stator and such that the proper gap distance between rotor and stator is maintained during rotation of the rotor without bearings external to the engine. The low voltage, high amperage winding (or winding group) may be tapped to provide a selectable voltage output. Suitable rectifiers and inverters may be provided to effect selective DC and AC output signals.

The invention relates to a tissue morcellator for minimally invasive surgery. The morcellator has a metallic cutting ring mounted on a visually transparent hollow cylinder, which in combination with a visually transparent outer morcellator tube enables a surgeon to visualize the inside of the morcellator shaft for detection of loose tissue fragments in the device. A tenaculum used with the morcellation device has a spacer for preventing contact with the blade. The cutting tube can oscillate, rather than rotate, along the longitudinal axis of the cutting tube. The morcellator utilizes an extendable tissue guide on the outer tube of the morcellator shaft for preventing the tissue from rotating along the longitudinal axis of the morcellator tube. This allows the tissue to be continuously rotated into the morcellator device for continuous peel. The tissue guide can also be fully retracted to allow for coring of the bulk tissue.

A tool holder attachable to a spindle of a hammer and which can receive a bit, the bit having a shank with at least one retaining groove extending along part of the shank, the retaining groove having a defined length, a front end and a rear end that limit axial movement of the bit in the tool holder, which tool holder comprises a hollow cylinder having an axis, an axial bore, a rear end that can be attached to the spindle of the hammer, and a front end that can receive the shank of the bit so that the bit is slidable within the cylinder in an axial direction, at least one retaining element that is located so that it can extend radially into the bore of the cylinder and into the at least one retaining groove of the bit so that the retaining element can be hit by the rear end of the retaining groove during the transition to idling and limit the extent of axial movement of the bit within the cylinder, at least one radial restraining element limiting movement of the retaining element in the radial direction, at least one axial restraining block limiting movement of the retaining element in the axial direction, when hit by the retaining element the axial restraining block movable to a limited extent in the axial direction with respect to the radial restraining element, and a resilient element located forward of the axial restraining block and arranged so as to attenuate the impact transmitted through the axial restraining block from the retaining element.

A holder includes a suction cup comprising a circular plate formed of resilient material and a rigid bell wherein the plate includes a central coupling member including outer threads, and the bell includes a hollow cylinder including two opposite openings with the outer threads disposed thereat; a manipulation assembly comprising a tube including an internal threaded section threadedly secured to the outer threads, a sleeve securely put on the tube, and a coupling mechanism seated upon the sleeve; and a pivot assembly comprising a pivot mechanism pivotably secured to the coupling mechanism, an arm extended upward from the pivot mechanism, and a seat assembly rotatably, pivotably secured to the arm. Preferably, the holder is adapted to hold an article (e.g., mobile phone) when it is immovably and captively retained on a dashboard of a motor vehicle.

An armature for an electric motor is constructed from a pair of precision machined copper plates cut in a pattern to produce a series of axially extending surface conductive bands with each band separated from the other by an insulated cutout. The precision machined plates are rolled to form two telescoping, hollow cylinders with each cylinder having a pattern of conductive bands representing a half-electric circuit. The outer surface of the inner cylinder is wrapped with several layers of fiberglass strands for structural stability and insulation. The fiberglass wrapped inner cylinder is telescoped inside the outer cylinder. The outer surface of the telescoped structure is also wrapped with several layers of fiberglass strands for structural stability. The conductive bands from the outer cylinder being the near mirror image of the conductive bands of the inner cylinder are helically coupled to form a complete electrical circuit. The resulting tubular structure is encapsulated in a potting material for further structural stability and insulation. The result is a freestanding ironless core inductive armature coil for a DC motor with brushes. The armature also has a commutator, which is mounted at one end of the coil and is in electrical contact with the helically coupled conductive bands. An insulated flywheel and shaft assembly is mounted inside the coil with the flywheel behind the commutator for motor mounting and operation.

An electromagnet (1), particularly a proportional magnet for operating a hydraulic valve, said electromagnet (1) comprising at least one coil winding (3) carried by a hollow cylindrical coil spool (2) which is circumferentially surrounded by a hollow cylindrical magnet housing (4) and limited at each end by a pole shoe (5, 6), said electromagnet (1) further comprising an axially moveable cylindrical armature (8) which is arranged in a hollow cylinder of the coil spool (2) that is configured as an armature space (7), the armature (8) being mounted for low friction in rotary, longitudinally moveable axial guides, and electromagnetically produced axial movements of the armature (8) can be transmitted to a hydraulic valve piston via a push rod (10) which is connected to the armature (8) to form an axial extension thereof. According to the invention, the rotary, longitudinally moveable axial guides of the armature (8) comprise at least one bushing-less linear ball bearing having a number of circumferentially spaced balls while being configured at the same time as an anti-stick means of the armature. The outer peripheral surface (9) of the armature (8) and/or the outer peripheral surface (11) of the push rod (10) is configured as an inner running track for the balls, and the inner peripheral surface of one or more components which limit the armature space (7) of the coil spool (2) forms an outer running track for the balls.

Disclosed is a holding device including: a telescopic handle having axially opposed front and rear ends and constructed of at least two separate shafts, of which a front-side separate shaft axially fits within a rear-side separate shaft being a hollow cylinder; and a support member provided at the front end of the telescopic handle for attachment of a cleaning wiper. The front-side separate shaft has an axially extending elastic arm and an engaging projection provided at a leading end of the elastic arm, while the rear-side separate shaft has a through-hole passing through a cylinder wall thereof, in which the engaging projection engages when the front-side separate shaft projects from the rear-side separate shaft by a predetermined length. Pressing the engaging projection, which engages in the through-hole, from outside the rear-side separate shaft permits release of the engaging projection from the through-hole.

A liquid metal evaporation source for use in Molecular Beam Epitaxy and related metal vacuum deposition techniques. An evaporator is maintained at a high temperature to evaporate a liquid metal, a reservoir for holding the liquid metal source is maintained at a temperature above the melting point of the metal but below the temperature in the evaporator, and a hollow transport tube connecting the evaporator and reservoir is maintained at a temperature between these temperatures. The reservoir is in the shape of a hollow cylinder with a close-fitting cylindrical piston which is used to force the liquid metal through the hollow transport tube into the evaporator. The liquid metal will not flow past the piston seal if a suitably small gap is formed between the piston and the reservoir walls wherein the surface tension of the liquid metal will exceed its hydrostatic pressure against the piston thus forming a leak-tight seal.

The invention involves an image sensor camera module and a method of fabricating the image sensor camera module. The image sensor camera module uses a single-body type lens holder defined by a hollow cylindrical body having a shoulder protruding radially inwardly from an inner surface thereof. First and second lenses therein are spaced apart by a first spacer and a filter therein is spaced from the second lens by a second spacer. An image sensor is adhered to a lower rim of the body, and the filter is adhered to an upper rim thereof. All optical elements within the lens holder thus are affixed in fixed relative position compatible with a predefined focal length and axis. Moreover, the adhesively sealed interior of the body of the image sensor camera module prevents particulate contamination.

A doorstop that includes a retainer piece disposed on one of a door and a door support, the retainer piece including a plastic housing with a main opening and a guide opening arranged perpendicular to the main opening and parallel to a pivot axis of the door. The doorstop also includes a door retaining rod articulated on the other of the door and the door support. The door retaining rod passes through the main opening of the retainer piece housing and includes a brake ramp and a catch depression on a side of the door retaining rod. The doorstop also includes a catch device configured to determine specific door opening positions. The catch device includes a brake body and a spring. The catch device connects the retainer piece and the door retaining rod to each other in a moveable manner. The brake body includes a hollow cylinder having a semi-spherical closed end and an open end and is slidingly disposed in the guide opening of the retainer piece. The open end accommodates the spring so that the closed end is pre-tensioned by the spring relative to the brake ramp and catch depression and is guided in the guide opening free of tilt.

An automated warehouse system row cart includes a lifter that uses cams to raise and lower pallets. Three symmetrical cam lobes are cut into a hollow cylinder. Three matching cam lifters ride these lobes and are attached to an elevator plate. A stepper motor running in one direction is used to raise and lower the elevator plate by virtue of the action between the cam lobes and lifters.

A pipe support is provided that includes a frame capable of being placed around an existing pipe and a plurality of support members within the frame. The frame is a hollow cylinder that includes two connectable halves divided along the diameter of the hollow cylinder. The pipe support includes two bearing rings connected to the frame for supporting each of the plurality of members at a minimum of two contact points. Each of the two bearing rings include bearing points for each support member arranged in a cylindrical pattern concentric with the hollow cylinder frame. The pipe support includes means for rotating each of the support members at a first contact point with respect to a second contact point so that the support members engage a pipe placed within the pipe support. The support members are rods that provide vibration isolation to a pipe placed within the pipe support.

The invention provides an electromagnetic system for detecting a distance between adjacent wells while drilling, which is capable of providing accurate guide measurement and calculation for the control of well tracks of wells with complex structures, such as a cross well, a U-shaped communicated well, a dual-horizontal well, an accident rescue well and the like. The electromagnetic system for detecting the distance between adjacent wells while drilling mainly comprises a magnetic pipe nipple, an electromagnetic measuring instrument and a method for calculating the distance between adjacent wells, wherein the magnetic pipe nipple is a hollow cylinder with API standard ports at the two ends consisting of a non-magnetic drill collar and a plurality of permanent magnets, and is used as a signal source for an electromagnetic guide system; the measuring instrument mainly comprises an underground searching tube and a ground system, and is mainly used for detecting a magnetic vector signal ofthe magnetic pipe nipple and for sending data to a computer through an RS-232 interface; and the computer processes and analyzes measured information by using the method for calculating the distance between adjacent wells so as to convert the measured information of a drill position into readable data for engineers. The electromagnetic system for detecting the distance between adjacent wells while drilling has a simple structure and convenient use, and provides an effective high and new technological measure for the detection and control of the distance between adjacent wells with complex structures.

An improved mixing tube design and fuel nozzle that allows for a more uniform and thorough mixing of fuel and air being fed to the combustor of a gas turbine engine, wherein each of a plurality of mixing tubes comprises a pair of concentric hollow cylinders that define a ring-like, annular path for the flow of fuel between the two hollow cylinders in each mixing tube, a plurality of air injection slots formed in the concentric hollow cylinders defining corresponding air flow paths from the outside into the interior of each mixing tube, and one or more fuel injection ports formed in selected ones of the plurality of air injection slots that allow for the flow of fuel from the annular path formed by the hollow cylinders into the air flow path, resulting in significantly better mixing and improved thermodynamic behavior of the fuel and air mixture downstream of the nozzle and upstream of the combustor.

The modular personal defense device is a hard, rigid, elongate baton that is capable of imparting impact force to an assailant or threat. The exterior may include a series of strengthening ribs, which may also impart further damage to an assailant. The interior is an essentially hollow cylinder configured to accept one of a series of modules. The modules are essentially externally physically identical, but include different electronic circuitry and mechanisms to provide different functions. A silicone controlled rectifier (SCR) electronic stun circuit is provided by one module, for imparting a stunning electrical shock and dissuading an assailant(s) due to the electrical arc produced. Another module produces an extremely bright light either continuously or in rapid pulses, to blind and disorient an assailant. Yet another module produces a piercing sound, while still other modules may be fitted axially or radially to the device to transmit an irritant spray.

False eyelash applicator apparatuses for applying a false eyelash to an eyelid are provided. One apparatus includes an applicator unit having an approximate shape of a hollow cylinder and including a first end, a second end, and a body extending from the first end to the second end along a lengthwise direction of the applicator unit, and at least one false eyelash holder disposed on the body of the applicator unit and for securing the false eyelash to the applicator unit. Another apparatus includes an applicator unit having a base, a first side surface, a second side surface, a first top surface, and a second top surface, a hole extending through the applicator unit from the first side surface to the second side surface, and at least one false eyelash holder disposed on the body of the applicator unit and for securing the false eyelash to the applicator unit.

A proctoscope which comprises a body preferably in the form of a hollow cylinder which makes it possible to insert it in the anal canal of a patient. The body of the proctoscope is provided with a construction as a level of the part of a distal end and with an aperture and a handhold on the other end. The body of the proctoscope is also provided with a passage in order to form a surgical window oriented towards the internal free zone thereof. The surgical window is formed in the external wall of the body in such a way that it can enter the part of the distal end by contracting itself.

The invention discloses a method for manufacturing a TC25 titanium alloy ring piece. A TC25 titanium alloy pre-rolled compact is heated to the deformation temperature of 30-50 DEG C below a phase transformation point, upsetting is carried out to enable the TC25 titanium alloy pre-rolled compact to be deformed by 50%-60% to obtain a solid cylinder, punching is carried out on the solid cylinder to enable the size of the inner diameter of the hole of the solid cylinder to be 60%-70% of the size of the outer diameter of the hole of the solid cylinder, a hollow cylinder is obtained, then mandrel supporter hole broadening is carried out, the size of the inner diameter of the hole of the hollow cylinder is made to be 70%-75% of the size of the outer diameter of the hole, a final forging temperature>=850 DEG C, the hollow cylinder is melted down when the hollow cylinder is hot, and heat preservation time is halved as is calculated with an actual thickness of 6min/10mm. Final rolling is carried out, the size of the inner diameter of the hole of the hollow cylinder is made to be 85%-90% of the size of the outer diameter of the hole, and a final rolling temperature >=850 DEG C. At last, double annealing processing is carried out, and the TC25 titanium alloy ring piece is obtained. The reasonable deformation temperature is adopted, and forging is facilitated. Air cooling is adopted after the forging, cooling is accelerated, the cooling process of air cooling is adopted in the double annealing process, and the mechanical performance of a forge piece is greatly improved.

The eddy cavitating unit used in the technological field of chemical separation consists of liquid inlet pipe and three coaxial cylinders including inner cylinder, middle cylinder and outer cylinder, the outer cylinder and the middle cylinder have individual tops with central inlet and common bottom, and the inner cylinder is a hollow cylinder and is connected to the middle cylinder via four radial cross beams. Or, the eddy cavitating unit consists of liquid inlet pipe, paraboloidal cone, disc with slit, flow guide plate and nozzle. Or, the eddy cavitating unit consists of liquid inlet pipe, outer paraboloidal cone, inner funnel cone and nozzle.

The invention relates to an inner supporting frame for a femoral head. A main body of the inner supporting frame is a hollow cylinder, a body part of the inner supporting frame is a round tube body, and a front end is connected with a hemispherical head; a tube wall of the tail part of the inner supporting frame is thickened compared with the body part and is provided with an external screw thread, and a back end face of the tail part is a plane and is provided with a straight line slot or a cruciform slot; lateral through holes are arranged on a spherical wall of the head of the inner supporting frame and the side walls of the body part and the tail part; and an artificial osteoinduction material is filled in a hollow cavity from the head to the tail part of the supporting frame. When the inner supporting frame for the femoral head is applied, the stress shielding and the dissolving of some metallic elements caused by big elastic modulus are avoided, therefore, the sufficient overall strength is not only provided, but also the bone tissue growth condition for transferring ossification and inducing ossification is reinforced.

A rotary switch mechanism includes a hollow cylinder, a base, a push button, a first rotatable member, a second rotatable member, a first switch, a second switch and a third switch. The base is disposed under the hollow cylinder. The first rotatable member is sheathed around the hollow cylinder. The second rotatable member is sheathed around the first rotatable member. The first switch is disposed beside the first rotatable member. The second switch is disposed beside the second rotatable member. The third switch is mounted on a first circuit board, which is disposed under the base. The first rotatable member and the first switch interact with each other to generate a first rotating signal. The second rotatable member and the second switch interact with each other to generate a second rotating signal. The third switch is triggered by the pressing rod to generate a pressing signal.

A surveillance camera assembly housing is releasably locked to a base for the housing. The base is installed on a ceiling or at another location remote from ground level. A removal tool head, in the form of a hollow cylinder, is provided at the end of a pole. Slots formed in the tool head engage ridges on the camera assembly housing. The assembly housing is twisted to release it from the base and then is brought to ground level while contained within the tool head.

A gas-biased hydraulic cylinder for compensating for the tare weight of a material handling apparatus to be actuated by the cylinder. A tubular body is capped by a cylinder head and a blind end. A piston assembly comprising a hollow cylinder rod having a piston travels through the cylinder head, the piston being seated within the tubular body for reciprocating action therein. The piston is actuated by hydraulic fluid. A hollow cylinder projects from the blind end through an opening in the piston assembly and into the hollow cylinder rod, the hollow cylinder and the piston assembly being sealingly and slidably connected. The interiors of the hollow cylinder and hollow cylinder rod form an interior chamber that is pressurized with gas to bias the cylinder rod so as to compensate for the tare weight of the material handling apparatus.

A method is provided for compressing a gas in a single cycle and in a single cylinder to a pressure of at least 17.2 Mpa with a compression ratio of at least about five to one. The method further comprises dissipating heat from the cylinder during the compression stroke whereby the gas is discharged with a temperature significantly less than isentropic. The apparatus comprises a hollow cylinder and a reciprocable free-floating piston disposed therein. The piston divides the cylinder into: (a) a compression chamber within which a gas can be introduced, compressed, and discharged; and, (b) a drive chamber, into which a hydraulic fluid can be introduced and removed for actuating the piston. The apparatus further comprises a piston stroke length to piston diameter ratio of at least seven to one. For operating the apparatus with a compression ratio of at least five to one, an outlet pressure of at least 17.2 Mpa, and a gas discharge temperature significantly less than isentropic, the apparatus can further comprise a variable displacement hydraulic pump for controlling piston velocity, an electronic controller for maintaining an average piston velocity that is less than 0.5 feet per second, and a heat dissipator for dissipating heat from the cylinder.

It comprises a swivel pin (1) coaxially inserted through a holed element connected to the frame of said mirror, said swivel pin having at a first end (1a) a flange (4) and at a second end (1b) at least a retaining configuration (3) adapted for being fixed on a corresponding retaining configuration of a base connected to a vehicle, an elastic member being arranged between said flange (4) and a support of said holed element. Said elastic member comprises a hollow cylinder (5) of moulded plastic material arranged as a skirt, from the peripheral edge (4) towards said second end (1b) of the swivel pin (1), coaxially to it, said hollow cylinder (5) being provided with at least one opening (6) defining at least one helical strip (7) suitable to provide the hollow cylinder (5) with an elastic property.