Abstract: The invention comprises an improved recoil control device comprising a bolt head and an inertia block for use in a variety of firearms. In one embodiment, the bolt head and inertia block are articulated so that the displacement of the bolt head results in a force component outside the firing axis of the barrel of the firearm. The device can be incorporated into firearms of a variety of sizes and configurations to produce recoil reduction and/or weight reduction advantages.

Abstract: A hydraulic/magnetic engine, comprising an engine assembly. Crankcase means are affixed within the engine assembly, and crankshaft means are positioned in the crankcase means. Cylinder means comprise at least two first cylinders being encased in the engine assembly and each including a first piston, at least two second pistons, and an electro-magnetic third piston. A hydraulic system has a hydraulic fluid chamber. First electro-magnetic means generates a first electromotive force, wherein switching magnetic polarity between a first and second openings forces a first piston, at least two second pistons, and an electro-magnetic third piston to move upward and downward within their respective cylinders. Thus, rotating the crankshaft means in a predetermined direction after an initial activation of the crankshaft means by applying a short period of an electrical force. The first electro-magnetic means is within the engine assembly.

Abstract: The invention relates to a reciprocating piston engine, particularly a coolant compressor for motor vehicles, comprising at least one piston movably supported in a cylinder, and comprising a pivot element (1), preferably designed as a pivot ring, supported on a guide body (5) that is attached to a shaft (3) in an axially movable fashion such that said pivot element can execute a pivot motion, causing movement of the at least one piston, wherein spring forces of at least one return spring (15) act on the pivot element (1) in the direction of a start position in which said pivot element is pivoted at a starting pivot angle (alpha start) to a plane (E) on which the rotary axis (D) of the shaft (3) stands upright. At least one further spring element (19) acts on the return spring (15) with an initial tension when the pivot element (1) is in the start position.

Abstract: A method of separating a target component from a chemical mixture comprising contacting a chemical mixture with a microporous coordination polymer. The microporous polymer is described by the formula: [M2(C8H2O6)] where M is a transition metal, rare earth metal, or other element from the groups consisting of HA through VB.

Abstract: A heat recovery apparatus, for an absorption apparatus for removing CO2 in combustion exhaust gas emitted from a thermal power plant 112 and for regeneration apparatuses 104 to 107 for regenerating CO2 in an absorbing liquid from the absorption apparatus, includes a regeneration-apparatus-exit-CO2-gas cooling apparatus 100 for cooling CO2 gas from an exhaust port of the regeneration apparatus, and may further include a circulation line 102 for circulating reflux water among boiler feedwater heaters 114 and 116 in the thermal power plant 112 and the regeneration-apparatus-exit-CO2-gas cooling apparatus 100.

Abstract: The subject matter disclosed herein relates to a method of reducing an amount of mercury discharged to an environment in a flue gas (12) generated by combustion of a fuel source. The method includes contacting the flue gas with a moist pulverous material upstream of a particle separator (24), mixing powdered activated carbon (PAC) in an amount between about 0.5 lb/MMacf and 10 lbs/MMacf with the flue gas (12) upstream of the particle separator (24), wherein the PAC interacts with at least a portion of mercury containing compounds in the flue gas (12), and separating the mercury containing compounds from the flue gas (12) containing the moist pulverous material and PAC, thereby reducing an amount of mercury in the flue gas (12).

Abstract: A gas treatment unit includes an absorber, a liquid-jet ejector, a gas-liquid separator, a regenerator and a pump. A liquid outlet of the regenerator is connected to an inlet of the pump. An outlet of the pump is connected to a liquid inlet of the absorber. A liquid outlet of the absorber is connected to a liquid inlet of the jet-ejector. A regenerator gas outlet is connected to a gas inlet of the liquid-jet ejector. A liquid-gas outlet of the liquid-jet ejector is connected to an inlet of the separator. A liquid outlet of the separator is connected to a liquid inlet of the regenerator.

Abstract: An oil mist separator includes a body inside which a filtering chamber is formed for a filtering unit made up with several centrifugal dust collectors. With an air intake unit, the outside oil mist is sent into the filtering chamber. Then, the centrifugal dust collectors are used to cause a spiral airstream. With a centrifugal force caused by the spiral airstream, the oil mist is made to separate from the air. Next, the filtered air of zero pollution is vented to the atmosphere, and the separated oil mist is collected and recycled. Thus, the oil mist may be separated and the recycled oil mist may be made into a low-level oil product or a release agent used in the building industry for achievement of the effect of environmental protection.

Abstract: A ground coffee extraction apparatus has a base to which a filter cup loaded with ground coffee is assembled from below. A delivery system pumps cool water from a cool water tank into the extraction apparatus. The cool water exerts a downward force greater than a resilient force of resilient elements of the extraction apparatus to drive a sliding element and a downward pressing element downward. Consequently, an O-ring seals a gap between the downward pressing element and the filter cup while the downward force is evenly applied to the ground coffee in the filter cup, thereby sealing and compacting the ground coffee hydraulically. After coffee is extracted, the cool water is drawn back into the cool water tank so that the sliding element and the downward pressing element are moved upward to unseal the filter cup. Hence, the automatic extraction apparatus enables rapid, uniform, and standardized sealing and compacting.

Abstract: A delivery head for espresso coffee machines comprises a top supporting element pivoted to a bottom supporting element in turn made rigid with the machine body, said bottom supporting element comprising an infusion recess provided for receiving a coffee holding capsule, said delivery head further comprising an operating lever operating at least one of the support elements to define at least an open position for loading and unloading the coffee capsule, and a coffee delivery closed position, said head including perforating means for progressively perforating the capsule and capsule ejecting means.

Abstract: A cleaning device can include a strainer that includes a base including an upper open end and an inner surface having abrasive scouring elements for removing debris from associated articles placed into the strainer. Openings extend through the base to allow liquid to pass through the openings carrying debris away from the associated articles retained in the strainer.

Abstract: A juice extractor comprises a body, a filtering apparatus, and a shattering apparatus. The body has an inner space. The filtering apparatus is disposed within the body and divides the inner space into a shattering chamber and a collecting chamber. The shattering apparatus is disposed within the shattering chamber and comprises at least a first cutting blade and a second cutting blade configured to shatter a comestible. The comestibles shattered by the first cutting blade can reach the second cutting blade and be shattered by the second cutting blade.

Abstract: A portable cable marking mechanism includes a gun-like housing with a pivotally mounted trigger assembly for moving a stamping unit along a predetermined inking path to engage in sequence an inking pad of a replaceable ink cartridge for inking the stamping unit and then a cable sleeve for providing the cable sleeve with customized indicia markings.

Abstract: A composite stencil for applying designs to walls and other surfaces is disclosed. The stencil includes a porous textile support layer to which a flexible stencil mask is bonded by an adhesion layer. The support layer supports unconnected parts of the stencil mask without bridges common with traditional stencils. Further, the textile support layer in the open areas of the stencil can be colored with a sublimation dye to suggest to a user the colors that should be applied in the various areas of the stencil. A pressure sensitive adhesive is applied to the back of the stencil. In use, the stencil is removably adhered to a surface by the pressure sensitive adhesive, whereupon paint or other pigment is applied through the textile support layer to the surface. The lack of bridges permits the entire design to be applied with a single stencil in a single session. The stencil is cleanable and reusable to apply additional designs.

Abstract: An improved ink system for a single pan design of a rotogravure printing press includes: the reservoir enclosing a substantial portion of the gravure cylinder; the intake section bottom having a slope at the bottom of the intake section; an intake port through the bottom of the intake section; an outtake port through the bottom of the outtake section; the outtake section bottom having a slope at the bottom of the outtake section sloping toward the outtake port; a dam release lever connected to the gate and extending outside of the reservoir, a plurality of channels through the vortex promoter; a pre-wipe bar located between the doctor blade and the vortex promoter; journal port seals located on each side of the gravure cylinder; and an angled doctor blade holder.

Abstract: A small footprint drum inkjet printer having a print head consisting of a number of print head arrays; a substrate carrier preferably in the form of a drum with vacuum orifices therein, a substrate loading cassette capable of movement, relative to the drum, in at least one direction; a substrate unloading cassette capable of movement, relative to the drum, in at least one direction, and a curing radiation source having a reflector which extends along the drum surface.

Abstract: In one embodiment, a media slitter includes first and second rotary slitter blades and first and second pairs of rotatable media transport rollers positioned along opposite first and second sides of a media path. Each pair of transport rollers is configured to engage the print media simultaneously with the other pair of transport rollers and move the print media along the media path. A first one of the media transport rollers in each pair of transport rollers is positioned adjacent to and outboard from a corresponding one of the slitter blades on an axis of rotation common to the first transport rollers and the slitter blades.

Abstract: In an overprint stamp and its method, mesh points are used to produce a pattern on a surface of the overprint stamp, such that the stamp has a function similar to a portable color printer. After inks of different colors have gone through an overprint process, the colors gone through the overprint process produce the effects of different colors and different layers to produce colors similar to a color photo.

Abstract: The invention is a method for transferring patterns on a key module. The key module includes a base and a plurality of keys assembled to the base, and a space exists between each of the keys and the base. The method includes following steps. A support jig is assembled to the key module. The support jig has a plurality of support portions filling the space to fix positions of the keys relative to the base. A film is positioned on the keys. A plurality of patterns respectively corresponding to the keys are disposed on the film. The film is heated and pressed, such that the patterns are transferred to the keys.

Abstract: A projectile including: at least one power consuming element, and a power supply which generates power from an acceleration of the projectile and supplies such power to the at least one power consuming element, the power supply including a device for storing potential energy upon the acceleration of the projectile and a device for converting the stored potential energy to electrical energy. Where the device for storing potential energy upon the acceleration of the projectile includes a movable mass and an energy storage device for storing energy upon the acceleration of the movable mass and the energy storage device is a chamber having a compressible fluid therein, the chamber being acted upon by the movable mass to reduce the volume of the chamber subsequent to acceleration of the movable mass.

Abstract: An ammunition firing device incorporating a firing pin intended to impact a pyrotechnic composition to activate its ignition, wherein said firing pin incorporates a rod that slides when said ammunition is fired through the effect of the firing acceleration from a starting position to a deployed position, able to be locked in said deployed position, said rod being integral with a percussion tip occupying a fixed position in contact with said pyrotechnic composition, said rod being located fully inside said tip in said starting position and protruding from said tip in its deployed position, said device further incorporating a hammer to strike said rod during the impact of said ammunition on a target to cause the ignition of said composition.

Abstract: Electric match assembly for initiating a pyrotechnic device in response to a signal, the assembly comprising a first element for connection to a leader carrying the signal; a first electric match component for connection to the lift charge of the pyrotechnic device, the first electric match component being connected to the first element such that when the first element is connected to the leader and the first electric match component is connected to the lift charge, the signal is applied to the lift charge; a second electric match component for connection to the time fuse connected to the burst charge of the pyrotechnic device, the second electric match component being connected to the first element such that when the first element is connected to the leader and the second electric match component is connected to the time fuse, the signal is applied to the time fuse of the burst charge.

Abstract: A high pressure cartridge case is provided for firearms with blowback operating systems. The cartridge case is provided with a primer support member that supports a primer in a rearward end of a cartridge case. The support member is slideable rearwardly in the cartridge case when the cartridge is fired. The components expand to seal with the cartridge case to prevent the escape of gas around the support member when the propellant is ignited.

Abstract: A marking paint ball includes a shell made of non-water-soluble polymer material and having a substantially spherical shape. A marking paint composition is contained in the shell. The shell is made of an oxo-biodegradable material. A method for making such a ball is disclosed.

Abstract: A railcar positioning system operable as either an indexer or progressor is disclosed which includes a pair of spaced trackside railcar movers positioned outside and parallel to the rails of a railroad track. Each railcar mover includes a spaced trackside guideway located next to one of the railway rails, a plurality of spaced connected dog carriages mounted for operation together in the guideway, each dog carriage carrying a pusher dog mounted on the carriage, a reciprocating hydraulic cylinder associated with the plurality of spaced, connected dog carriages. A hydraulic power unit is connected to operate each of the cylinders individually or together and a control system is associated with the power unit for controlling the operation of the positioning system such that said positioning system may be optionally operated as an indexer or as a progressor.

Abstract: The object is to provide an obstacle-removing device for a removing obstacles on guideway, which is simple in configuration, low in manufacturing cost, and can remove the obstacles steadily and effectively, and of which the brushes for sweeping the running surface can be retracted easily when the device is in the rear side of traveling direction of the vehicle. The device comprises; a vertical frame positioned to the leading end in traveling direction of the vehicle, and a lifting/lowering device attached to the said vertical frame to lift and lower a brush holder attached to a vertically movable member which can be lifted and lowered by the lifting/lowering device, the brush holder having brushes for removing obstacles on the guideway; wherein the brush holder is pivotally attached to the vertically movable member such that the brush holder is tilting forward when the brushes held by the brush holder contact the running surface to perform obstacle-removing operation.

Abstract: The invention relates to a magnetic levitation train, comprising a track system formed of track system carriers (2) and a vehicle (1) having at least one first magnetic system (7), which together with stator packs (4) mounted on the track system forms a long stator linear motor and during operation is disposed at a distance from the stator packs (4) by a small carrying gap. According to the invention, first sound damping bodies (14) are disposed on the carriers (2) in a space which is located between the carrier (2) and the magnetic system (7) and the carrying gap when a vehicle (1) passes. In addition, second sound damping bodies (15) are provided on the vehicle (1) on the side of the magnetic system (7) facing away from the carrier (2).

Abstract: The Innovative Four Railroad Track Systems expands present two track rail systems to support the use of twenty foot wide cars that will simplify the loading, unloading and therefore transportation of many goods, especially vehicles and similar sized construction or farm equipment. The extra two rails are added on the outside of the current track in single rail lines. The expanded width of the cars allows for loading and unloading from the side which can be facilitated in the case of vehicles through a tiered loading dock much the same as is done with a ferry, hence the name “train ferry”. This will drastically reduce the time and effort required and revolutionizes the bulk transportation of these goods.

Abstract: Disclosed is a series of stacked intermodal containers, being pulled by a locomotive of a train, with aerodynamic drag reducing devices. The series includes at least a first, leading set of containers and a second, trailing set of containers. The first, leading set of containers has an aerodynamic drag reducing device with a drag reducing fairing and an attachment frame attached thereto facing a forward direction. The attachment frame includes at least one mounting device configured to be removably mounted in the tunnel of the top container of the first, leading set of containers. Additionally, the second, trailing set of containers may include a second, aerodynamic drag reducing device, also attached via a gooseneck tunnel. Curtains may also be attached between a plurality of intermediate or adjacent sets of stacked containers to assist in reducing drag on the train when moving.

Abstract: An improved rail car door closer system is provided wherein the movement of a number of appropriately positioned closer wing plates into contact with a number of open rail car hopper doors, is accomplished with hydraulic cylinders and motors. The system incorporates components that direct both the rotation of the wing closers (around a cylindrical frame so as to position the wing closers in and out of position for door closure), and the translation of the wing closers (along the longitudinal cylindrical frame so as to effect the actual closing of the hopper doors). The system is arranged to close more than one door at a time and in the preferred embodiment includes three simultaneously operated door closer wing structures. The heavy duty cylindrical frame incorporates a number of cylindrical outer segments sized to fit around and on the inner cylindrical frame. The segments are directed to rotate and translate on the inner cylindrical frame.

Abstract: A rail road car such as a double tub coal gondola car has a center sill that is narrow in the middle between the two tubs, and wider at the draft arms. The center sill has a transition section that provides a smooth, gradual transition between the respective bottom flange portions of the two without sharp changes in direction in the stress fields in tension and compression, and with little or no out of plane eccentricities in load path, and with a tendency to minimize or avoid local stress concentrations. The center sill includes a set of access apertures and corresponding bridges or ties that maintain the lateral halves of the center sill flange main portion in appropriate relationship to each other with respect to resistance to buckling. The tubs fasten mechanically to the sides of the center sill.

Abstract: A railroad car hatch cover including a high strength and highly rigid laminate panel having an inner aluminum member, an outer aluminum member, and a solid plastic core. A cross-section of the laminate panel includes a center section with two generally parallel and generally vertical sides. Each generally vertical side of the panel is joined to center section of the panel along a longitudinally elongated curved corner having a radius of less than 1.5 inches. Moreover, compressible gasket structure is secured to an underside of the center section of the laminate panel in the vicinity of each corner for engaging and pressing against a top rim of railcar coaming to seal the hatch cover whereby inhibiting contaminants from passing between the closed clover and the coaming on the railcar. Additionally, the laminate panel is provided with longitudinally spaced structure, arranged inwardly from the opposed ends of and secured across the laminate panel, for adding further strength and rigidity to the hatch cover.

Abstract: A wood adhesive having a) 100 weight parts of water; b) between 3 and 45 weight parts of a proteinaceous material; c) between 0.01 and 15 weight parts of an acidity regulator; d) between 0.01 and 15 weight parts of an aromatic compound; e) between 0.01 and 15 weight parts of a curing agent; f) between 0.01 and 15 weight parts of a preservative; g) between 0 and 15 weight parts of a viscosity modifier; h) between 0 and 10 weight parts of a filler; and i) between 0 and 15 weight parts of a drier. The wood adhesive can be used for preparation of plywood, blockboard, oriented strand board (OSB), flakeboard, fiberboard, veneer plywood, middle density fibreboard, high density fibreboard, hardboard, flooring substrate, LVL, and so on. A method for preparing the wood adhesive is also provided.

Abstract: In a process for producing a solid pigment preparation in the form of granules which comprises the steps of (a) atomizing a suspension comprising (A0) 30% to 90% by weight of a solvent component based on the overall weight of the suspension; (A1) 2% to 60% by weight of a pigment component based on the overall weight of the suspension; (A2) 0% to 50% by weight of a first filler component based on the overall weight of the suspension, (A3) 10% to 70% by weight of a surface-active additive component based on the sum total of the weights of said components (A1) and (A2), and optionally further components, the sum total of the weight fractions of all components, based on the overall weight, being 100% by weight, in an atomizing apparatus; (b) contacting the droplets formed in step (a) with a gas stream having a predetermined temperature to dry the droplets to obtain granules having a predetermined residual moisture content, and (c) separating the granules from the gas stream, in step (b), before reaching

Abstract: Methods of characterizing and producing compositions with negative ?13C values are provided. Aspects of the invention include characterizing source materials and process products. Aspects of the invention also include compositions that contain carbon with negative ?13C values.

Abstract: A monoazo pigment is represented by the general formula (1), a tautomer of the monoazopigment, and a salt or a hydrate thereof: wherein R1, P1, and Q1 each independently represents a hydrogen or a substituent, G represents the non-metallic atoms necessary to complete a 5- to 6-membered heterocyclic group, W represents a substituent capable of binding to the heterocyclic group constituted by G, t represents an integer of from 0 to 5, Het-1 represents a group selected from the aromatic heterocyclic groups represented by the general formula (2): wherein X, Y, Z, W0, W1, W2, W3, and W4 each independently represents a hydrogen or a substituent, and * shows the point of attachment to the azo linkage in the general formula (1).

Abstract: A construction material composition includes a cross-linked starch derivative of a starch that is rich in amylopectin and has an amylopectin content greater than 85%.

Abstract: A clay plaster formulation and application. The clay plaster is a mixture of various clays, and aggregate. This plaster is both functional and decorative and is for use on new and existing construction.

Abstract: A television table which can be assembled and disassembled without tools is provided. The television table unities a first connecting body and a second connecting body mounted between a tabletop and a pedestal. The first connecting body includes at least one fixing pillar extending therefrom. The second connecting body includes at least one slot. The slot has a proximal edge for allowing the head section to be inserted therethrough and a clamping edge for tight-fitting the fixing pillar. Also, a fixing pin passes through fixing holes of the tabletop and the two pedestals to avoid the tabletop sliding laterally respective to the pedestals and make a connection of the tabletop and the two pedestals firmly.

Abstract: An executive/clerical type office desk embodying a fully contained electromechanical system for elevating and lowering the desktop, between a user's seating position and a full standing position. Three telescoping stanchions support and control the desktop height from a standard-desk height to an upper height of about 44 inches. The desktop rest directly on three poles sliding inside the telescoping support stanchions. The sliding poles are lifted and lowered by cables looped-under pulleys mounted in bottom of said poles, and are drawn up and released by an electric-motor-driven cable winch. Anti-friction treatments are in place between the inner sliding members and the supporting stanchions. By said cables looping under pulleys, installed in the bottom of each inner telescoping member, and anchoring atop the telescoping stanchions a lifting mechanical advantage of two is obtained. The user operates a three position electrical switch to raise and lower the desktop.

Abstract: A joint obstacle to ants is formed from two or more moats containing a liquid such as water, or a water dish soap mixture, spaced closely apart. The moats surround a table or serving plate for presenting dessert. The moats are separated by a short band about the same width as the moats. By spacing the moats closely apart, the ants rejects a path across the second moat, thereby preventing the ants from reaching the dessert.

Abstract: An improved folding table is distinguished by the following features: a locking means is provided, by means of which the table top (5) can be locked in the work or use position thereof and in the storage position thereof, the locking means can be unlocked by means of a disengagement means (15), as well as the hand-actuatable disengagement means (15a), a further foot-actuatable or shoe-actuatable disengagement means (15b) is provided, and the at least one further foot-actuatable or shoe-actuatable disengagement means (15b) is provided on the underside of the table on the table half which is lower than the pivot axis of the table top (5) and/or is lower than the hand-actuatable disengagement means (15a) when the table top (5) is pivoted into the storage position.

Abstract: A system for use in providing moisture for plants including; a corn based polymer jell in a pressurized container pressurized to a first pressure above atmospheric pressure. A flexible hose connected to the pressurized container and to a manually operated pump, the manually operated pump supplying polymer jell pressurized at a second pressure higher than the first pressure through a rigid tube and out a tip on the tube and into soil.

Abstract: A steerable wing-type sail system for a wind powered craft. The system includes first and second secondary airfoils and that are spaced outwardly to the sides of the plane of the main wing, and that are positioned rearwardly of the trailing edge of the wing. The secondary airfoils are selectively pivotable so as to steer the main wing in one direction or the other. The main wing is also provided with a pivoting flap at its trailing edge, which pivots simultaneously with and in the same direction as the secondary airfoils. The secondary airfoils are carried on elongate horizontal booms mounted near the mid-span height of the main wing. The secondary airfoils pivot about vertical axes at the distal ends of the booms, and are operated by control cables that are retracted and paid out by linear actuators or similar mechanisms. The craft may be multi-hull vessel, such as a catamaran.

Abstract: A marine vehicle includes a hull, a rudder, a propeller, a swirl generator mounting region provided on an outer surface of the hull and located on a port side or a starboard side where a rotation direction of the propeller is downward, and a pre-swirl generator having a swirl creating wedge disposed in the swirl generator mounting region. The swirl generator mounting region is disposed in front of a central axis of the rudder and behind a vertical line spaced from the central axis by a distance that is 0.2 times the length of the vehicle. The swirl creating wedge is inclined with respect to a waterline by an angle (?1) of 13°-45°. The pre-swirl generator can produce a flow guiding effect that enhances propulsive efficiency of the marine vehicle.

Abstract: A method and a device for suppression of cavitation and thus for reducing resistance to movement of a streamlined body in a flow of liquid based on the principle that development of cavitation bubbles in the area of separation of the flow that is accompanied by the development of turbulence is prevented by injecting a gaseous medium into the aforementioned area for separating the flow of liquid from the surface of the streamlined body. The device of the invention can be realized in the form of various specific embodiments with supply of gas under pressure to the cavitation-development area through a plurality of perforations and transverse slits.

Abstract: An anchor protector attaches to a protruding stock of a boat anchor and minimizes damage from impact with the protruding stock. The anchor protector is buoyant and can accommodate the protruding stock of various diameters.

Abstract: A boat includes a boat body and an accompanying device. The boat body includes a hull defining a first accommodation space and having left and right sides, an electric motor disposed on the hull, and a propulsion unit driven by the motor. The accompanying device includes at least one carrier assembly. The carrier assembly includes a carrier attached to either the left or right side of the hull and disposed outwardly of the hull so as to define a second accommodation space, and a battery set disposed within the second accommodation space and connected electrically to the motor for supplying electricity to the motor.

Abstract: Embodiments disclosed herein generally relate to an HVPE chamber. The chamber may have two separate precursor sources coupled thereto to permit two separate layers to be deposited. For example, a gallium source and a separate aluminum source may be coupled to the processing chamber to permit gallium nitride and aluminum nitride to be separately deposited onto a substrate in the same processing chamber. The nitrogen may be introduced to the processing chamber at a separate location from the gallium and the aluminum and at a lower temperature. The different temperatures causes the gases to mix together, react and deposit on the substrate with little or no deposition on the chamber walls.

Abstract: The present invention is an apparatus for producing a single crystal, growing the single crystal by the Czochralski method and comprising at least: a main chamber in which a crucible for accommodating a raw material melt and a heater for heating the raw material melt are arranged; a pulling chamber into which the grown single crystal is pulled and accommodated, the pulling chamber being continuously provided above the main chamber; and a cooling cylinder extending at least from a ceiling of the main chamber toward a surface of the raw material melt so as to surround the single crystal during pulling, the cooling cylinder being forcibly cooled with a cooling medium. As a result, there is provided an apparatus for producing a single crystal that can increase the growth rate of the single crystal by efficiently cooling the single crystal during the growth.