Abstract: The present invention takes place of solid oxide fuel cell (SOFC) in tests. Some tests among them are done to find ways to recycle exhausts of the SOFC. And, some other tests among them are done to evaluate benefits of re-burning the exhausts. All tests save cost and time.

Abstract: A latch release for allowing two latched members to be unlatched from each other. The latch release includes a bubble body comprised of an elastic material. The bubble body is adapted to deform such that depressing of a first section of the bubble body in a first direction deforms a second section of the bubble body to push the latched members apart.

Abstract: In one embodiment, a micro-gyro device for measuring rotational movement about an input axis includes a driving element generating a driving signal. A MEMS gyro includes a motor rotor and a motor assembly. The motor rotor receives the driving signal and oscillates about a motor axis at a frequency determined as a function of the driving signal. The motor assembly oscillates around a rate axis, which is orthogonal to the motor axis, as a function of the frequency of the motor rotor oscillation. A capacitance of the motor assembly changes as a function of the oscillation of the motor assembly. Driving element feedback circuitry, including a first band-pass filter, is between the motor rotor and the driving element. The driving element feedback circuitry causes the driving element to generate the driving signal as a function of an amplitude of the motor rotor oscillation for maintaining the amplitude of the motor rotor oscillation within a predetermined range.

Abstract: An exoatmospheric device comprises an inertial measurement unit comprising a spin axis gyroscope adapted to obtain data regarding angular rotation of the exoatmospheric device about a spin axis, and at least one off-spin axis gyroscope adapted to obtain data regarding angular oscillation of the spin axis. The exoatmospheric device further comprises a processing unit coupled to the inertial measurement unit and adapted to detect attitude error by analyzing correlations between the measured rotation about the spin axis and the measured angular oscillation of the spin axis.

Abstract: A ball screw device includes a screw shaft threaded with a ball nut which has one or more channels, and one or more end deflectors attached to the ball nut to form an endless ball rolling passage in the ball nut and to receive a number of bearing members which may facilitate a movement of the ball nut relative to the screw shaft. The ball nut further includes one or more slots communicating with each of the channels, and each for receiving a cushioning member which may cushion the bearing members for reducing a noise that may be generated by the bearing members and the ball nut and the screw shaft. The cushioning member may selectively apply a lubricating material to lubricate the bearing members.

Abstract: The present invention relates to a device at an operating arrangement (4) for driving or operating elongate display members (2) at signs (1) for consecutive, repeated presentation of series of images. In order to present a device which provides an optimum initial driving engagement between a gear sector (14) of a driving gear wheel (9) and a driven gear wheel (10) of the operating arrangement (4), the driven gear wheel (10) comprises at least two portions (15) which facilitate bringing along of said driven gear wheel (10) for rotation thereof and which are located such that each time the gear sector (14) during rotation begins to mesh with the driven gear wheel (10), this occurs through one of these portions (15).

Abstract: In a ball circulating groove structure of a ball nut, a deflector is provided with an inner collar extending along a penetrating direction of a hole of the ball nut and engaging with the ball nut in a side of an inner surface of the ball nut, and an outer collar engaging with the ball nut in a side of an outer surface of the ball nut.

Abstract: The invention is related to a toothed steel cable transmission mechanism, especially through a deceleration mechanism that the deceleration DC motor drives a worm, a worm gear assembly and a toothed steel cable for both linear movement in a curved section. It provides multiple benefits when it is applied to things such hopper windows, awning windows, casement windows, tilt-turn windows, sliding windows, window blinds, air vent system and skylights, or angle or height adjustment for hospital beds or sleep beds.

Abstract: Among six follower balls (5) aligned on the input shaft (7), the two balls (5) situated on one end side (A) always engage tightly with one engagement surface (10a), while the other two balls (5) situated on the other end side (B) always engage tightly with the other engagement surface (10b). This regulates the movement of the balls (5) against the engagement surface (10a, 10b) of the cammed streak portions (10) so as to eliminate a backlash played between the balls (5) and the cammed streak portions (10). This makes it possible to prevent the meshing noise from being induced so as to implement a low noise operation. With the point-to-point contact maintained between the cammed streak portions (10) and the balls (5), it is possible to reduce a friction therebetween, thereby improving a torque transmissibility against the follower wheel (4) to insure a smooth rotational movement with a higher precision.

Abstract: A webbed spiral bevel gear formed by cold forging includes: gear teeth formed at a peripheral surface of the gear basis to be integral therewith. Each gear tooth includes a tooth top land and a tooth bottom land both in a slanting and curved manner relative to a center axis of the gear basis. The webbed spiral bevel gear includes a web portion formed at radially outer end portions of the gear teeth to be integral therewith and closing the tooth bottom lands at the radially outer end portions of the gear teeth. The web portion is continuous with the radially outer end portions of the tooth top lands. A profile of the radially outer end portion of the tooth top land of each gear tooth has two edges extending at a slant from each other and expanding in a direction of the web portion.

Abstract: A fixed support is provided on a base member near a moving lever. A moving support is provided on the moving lever. A coil spring comprises a coil and a pair of arms extending from the coil. The fixed support is wound with the coil. The moving support is held between the two arms of the coil spring and pressed by outward force of the coil spring thereby assuring smooth reverse of a direction of the force.

Abstract: A linkage arrangement comprises a first attachment member for fixedly attaching to a support structure such as a vehicle handle bar and a second attachment member for loosely attaching to said support structure; a resilient joining member for joining the first and the second member; and a member for carrying an object such as a vehicle brake lever; whereby when the object is acted against the resilience of the joining member, it displaces from its rest position and thereafter returns under the resilience of the joining member to its rest position.

Abstract: A substrate handling robot having a robot body and a robot arm with an end effector is configured to exhibit angular (?), radial (R) and Z motion. A pair of coaxial shafts link the robot arm to respective motors dedicated to angular (?) and radial (R) motions. The motors are stationarily mounted with respect to the robot body. The shafts are rotatably supported by a floating platform which is motivated in the Z direction by a third motor also stationarily mounted with respect to the robot body. The third motor is coupled to the platform by a Z motion linkage. The first and second motors are coupled to the coaxial shafts by angular and radial motion linkages each of which includes primary and secondary timing belts whose relative motions are synchronized with the Z motion linkage to achieve controllable independent angular (?), radial (R) and Z motions in a simple, light-weight package.

Abstract: A work machine having a loop-shaped operating handle connected to an upper end part of a handle post. The operating handle pivots to positions in the longitudinal direction of the work machine across a longitudinal axis of the handle post as a baseline.

Abstract: A bicycle shift operating device is provided with a mounting part, a first operating member and a first signal generator. The first operating member is movable from a first operation start position such that the first operating member returns to the first operation start position upon completion of a shifting operation. The first signal generator generates a signal for changing a shift position of the bicycle shift operating device by one shift position in a first direction from a current shift position in response to the first operating member being moved from the first operation start position to a first position. The first signal generator generates a signal for changing the shift position by two shift positions from the current shift position in response to the first operating member being moved from the first operation start position to a second position located beyond the first position.

Abstract: A control knob assembly (16) including a housing having a front member (12) and a rear member (32). A control knob (22) is mounted for turning and axial movement in an opening (36) in the front member (12), said turning and axial movements being associated with control settings to be transferred to a control shaft (52) of a control member (18) generating electric control information. The control knob (22) and the control shaft (52) are interconnected so as to allow for excess force applied axially on the control knob (22) towards the control shaft (52) to be taken by the housing (12, 32).

Abstract: A bicycle pedal assembly includes a pedal body having a sleeve tube and front and rear protruding portions. A front clamping member is mounted rotatably on the front protruding portion, and is biased by a front biasing member to rotate toward the sleeve tube. A locking member is connected to the front protruding portion, and is operable to abut against the front clamping member so as to lock the latter against rotational movement. A rear clamping member is mounted rotatably on the rear protruding portion, and is biased by a rear biasing member to rotate toward the sleeve tube. An adjusting member is connected to the rear clamping member, and is operable to adjust the biasing force of the rear biasing member.

Abstract: A rear cover assembly for a drive shaft of an automatic transmission includes a rear cover to which a bearing for supporting the drive shaft is disposed, an elliptical sleeve secured to the rear cover, and a seal ring disposed to the sleeve. The ratio between the major axis and the minor axis of the sleeve may be 21 to 20. The sleeve may be secured to the rear cover by being pressed thereon.

Abstract: An axle housing assembly for a motor vehicle comprises a hollow, elongated arm section extending along a center axis and a wheelend. The wheelend is fixed to an outboard end portion of the arm section. The wheelend includes a wheelend adapter fixed to the outboard end of the arm section so as to extend radially outwardly therefrom, a tubular spindle member extending axially outwardly from the wheelend adapter substantially along the center axis, and a brake backer plate attached to the wheelend adapter. The spindle member has a substantially cylindrical bearing support surface for supporting an axle bearing.

Abstract: A device that produces linear motion by sequentially and in a continuous sequence accelerating inertial thrust masses at well defined times towards the axis of counter-rotating disks. The inertial thrust masses are contained in cavities placed equidistantly about the periphery of counter rotating capture disks mounted on a common axle. They are radially accelerated by a bi-directional impulse ramps that can be moved to any position around the periphery of the counter rotating capture plates and into and out of the paths of the gyrating thrust masses to any desired depth within the mechanical range of the impulse ramps which simultaneously engage and radially accelerate the inertial thrust masses of each counter-rotating capture plate. The counter-rotating capture plates are each separately driven by a gear assembly powered by an external engine or motor that powers the rotation of the disks.

Abstract: The present invention discloses a type of alloying fine adjustment method in which alloy materials are pulverized into micropowder and fed via the conventional powder spraying system; the said alloy materials are fed into the upper part of the spraying tank of the spraying system whose spraying pipelines are connected to the aerated bricks at the bottom of the molten steel container. Based on the existing argon blowing and mixing system, argon is taken as the carrier and used to pressurize the alloy powders into the aerated bricks at the bottom of the molten steel container via the spraying system and further into the molten steel container for the sake of alloying fine adjustment. After the alloy powders are fed, continue blowing and mixing argons until the alloy powders and the molten steels are evenly mixed in the molten steel container to complete the alloying process. This method features such advantages as short alloying time, good alloying effects, high yield of alloys and absence of pollution.

Abstract: A socket wrench (10) has tubular sections (20, 24) at its opposite ends separated by a center wall (26) that includes a non-circular socket (28) for receiving a complementary shaped end portion (30) of a turning tool (32). The tool (32) is inserted endwise through one end of the tool (10) and its end (30) is inserted into the socket (28) lug-receiving recesses (38) formed in the opposite end of the wrench (10) are moved to engage lugs (18) on a lug nut (12, 14). Each end of the socket wrench (10) is constructed to engage a different size lug nut (12, 14). At its longitudinal center, the socket wrench (20) is provided with wrench flats (46) for receiving the jaws (50) for an open-ended wrench (48). The end portions (22, 24) are preferably provided with knurling, serrations, or some other high friction surface that can be easily held so that a user can turn the socket wrench (10) by hand.

Abstract: A screwdriver handle includes first and second handle parts each having an end face with a pivotal coupling portion. The second handle part is pivotable between two positions relative to the first handle part such that the screwdriver handle is switchable between an in-line state and an angled state. Two positioning holes are defined in one of the end faces and a receptacle is defined in the other end face and aligned with one of the positioning holes. A positioning member is mounted in the receptacle and includes an end releasably engaged with one of the positioning holes to retain the second handle part in one of the positions. A control member is mounted on one of the first and second handle parts and operable to disengage the positioning member from the positioning holes to thereby allow the second handle part to pivot relative to the first handle part.

Abstract: This invention is to introduce a screwdriver bit holder structure, whose holder body has a polygon hole in one end, and inside the polygon hole set an inner spring and a sliding tube. The holder body is externally clipped by a c-clamp, ahead of which are symmetric front balls and holes, and behind which are symmetric middle and back balls and holes that can fit with front and back grooves respectively to confine the movement of the sliding tube. A fixing cap is capped on the holder body around polygon hole. In the back of inner hole of the fixing cap sets a limiting ring, and in the front sets a front recess and a back recess that is designed, by sliding the cap forward and backward along the holder body, to push front balls to fit into the fitting concaves of the bits so as to fix them tightly with the holder body or loose front balls from fitting concaves to release the bits.

Abstract: The present invention relates to automotive vehicle brake lathes configured for resurfacing brake rotor components, and in particular, to an improved on-car brake lathe apparatus and a method for reducing vibrations during resurfacing of brake rotor components with a brake lathe having a variable speed spindle motor, an output spindle rotationally driven by the variable speed motor adapted to couple the brake lathe to the brake rotor component, and at least one adjustable cutting tip adapted to engage a surface of the vehicle brake component.

Abstract: An apparatus and method for machining of components, namely for rotary machining of rotationally symmetrical components on radially interior machining surfaces of a component, is disclosed. The device has a drill rod extending essentially axially and has a tool mount extending essentially radially, carrying a lathe tool. The drill rod has a projection that extends essentially radially and can be coupled to the tool mount that extends essentially radially, where the radial dimensions of the projection of the drill rod and of the tool mount are adapted to the dimensions of a hub bore of the component to be machined, such that the drill rod and the tool mount in the uncoupled state can be inserted into the hub bore, and, in the coupled state, the lathe tool mounted in the tool mount can be brought into contact with the radially interior machining surfaces of the component.

Abstract: In a method of working a structure, a mold material is mounted on a mold material mount portion of a cutting/working apparatus and rotated about the C-axis serving as the rotation center while a cutting tool is driven and moved in directions X and Y. Then, a desired position of the mold material is cut with the cutting tool at a relatively formed desired cutting speed and elliptically vibrated/cut with the cutting tool, for forming a Fresnel lens molding cavity having an opening of a desired shape and a working surface (concave surface, for example) of a desired shape. According to this method, the productivity of an optical component mold employed as the structure can be efficiently improved when the mold for molding an optical component such as a Fresnel lens is worked by cutting the mold material employed as a workpiece with the cutting tool in a four-spindle lathe-type cutting/working apparatus including X-, Y-, Z- and C-axes of rotation.

Abstract: Concave/convex portions are consecutively formed on a back of a band saw blade. The concave/convex portions include concave portions engageable with and disengageable from a backup guide of a band saw guide unit, and convex portions adjacent to the concave portions. A length of each of the concave/convex portions is configured to be equal to or smaller than four times a maximum pitch of a tooth top of each tooth.

Abstract: A quick release structure for use in the saw blade guard assembly of a table saw is disclosed to include a mounting member affixed to the base of the table saw, a coupling block detachably attached to the mounting member to hold a pivoted attachment member, for example, a saw blade guard, and a rotary locking member mounted in the coupling block and rotatable relative the coupling block between two positions to lock the coupling block to the mounting member or to release the coupling block.

Abstract: An assembly for a cutting machine which includes a base, a rotating blade extending from a top surface of the base for cutting a workpiece put on the top surface of the base and a support member fixed to the base. The assembly includes a protection member having a first end connected to the support member and the rotating blade of the tile cutting machine is received in an open bottom of the protection member. A fence assembly includes a first fence pivotably connected between two sidewalls of the protection member so as to cover the rotating blade.

Abstract: A rotating blade-type cutting device, such as a miter saw, and a laser module for use with the cutting device. The laser module includes a housing rotating in unison with the saw blade, a laser generator positioned within the housing so as to emit a laser beam therefrom, and a power source positioned within the housing. The power source is removable from the housing while the housing is coupled with the saw blade so that the power source is easily accessible to the saw operator.

Abstract: A punching apparatus is disclosed. The apparatus includes an upper plate including a punching member having punching blade and guide blade with specific patterns, and upper jig to elastically support the punching member and having guide hole with the same pattern as the blade pattern; a lower plate including lower jig formed with punching hole having the same pattern as the blade pattern, and a guide protrusion to punch by variously changing positions of an object to be punched; and magnets independently provided at corresponding positions of the upper and lower plates, independent from each other, to face each other and to align the upper plate with the lower plate at a predetermined position. The punching can be freely performed at a desired position regardless of the position of the object to be punched and the object can have a continuous punched pattern.

Abstract: A saw band of steel for a band saw machine with a band back (Br) and with a tooth row attached thereon comprises several teeth (20), wherein the initial tooth form (10) is triangular with a tooth base with tooth width (b) and with the tooth tip (1) with a first tooth height (h1), such that the tooth tip (1) does not project beyond tooth width (b) in the band running direction (L), wherein the lateral side of the triangle located in front in the running direction (L) forms the rake face (2) and the rear lateral side forms the clearance face (3) of the tooth (10, 20). The tooth tip (1) of the triangle is specifically removed [of material] for the development of a rounded-off tooth crest (4) with a reduced second tooth height (h2), wherein at least in the proximity of the tooth crest (4) a hard material coating covers at least partially the cutting face formed of the tooth crest (4), the rake face (2) and the clearance face (3).

Abstract: A system and method are described for rendering Compact Discs (CDs) and Digital Video Discs (DVDs) unreadable. Embodiments comprise a frame, a guide for constraining motion of the frame with respect to a disc, and at least one scraping element. Scraping elements may be positioned to damage the disc volume descriptor while the frame moves in a constrained manner relative to the disc. The guide may comprise a spindle which engages the center hole of a disc to hold the frame in a radially-fixed position. A scraping element on the frame damages the disc as the disc rotates relative to the frame. The guide may be integrated, such that the frame comprises a slot through which the disc passes. A scraping element inside the slot damages a disc as it passes through. Embodiments are hand operated, not motorized, and some have no moving parts. Embodiments also function with non-optical media.

Abstract: A stringed instrument (10A) neck structure adjusting arrangement includes a cantilever member (39). One end of the cantilever member is configured to be connected, in use, to a body and/or neck structure of the stringed instrument. The cantilever member is configured to be moveable relative to a free end of the neck structure of the stringed instrument. The arrangement also includes an adjustment device (30) located at or adjacent a free end of the cantilever member. The adjustment device is configured to adjust a position of the cantilever member (39) relative to the neck structure, thereby adjusting curvature of the neck structure. The adjustment is in a plane substantially perpendicular to a main axis of the neck structure.

Abstract: A visual interface or guide is provided for a fretted, stringed musical instrument. It has two or more guide strips that fit between the neck and the strings of the instrument. Adjacent guide strips have a gap or opening between them that can receive a fret. Visual indications on one or more of the strips indicate finger placements for the user. In some embodiments, guide strips are interconnected by an elastic medium and have a spacing apart from one another that is adjustable. Various methods for attaching the guide to an instrument are disclosed.

Abstract: I, D. Loran Curet Troche, invented a new musical instrument named ACOUSTICONGA. This instrument includes a membranophone, a chordophone, an aerophone, and an idiophone, four of the original Sachs-Hornbostel musical instrument classifications. The ELECTROCONGA is the electric version of the ACOUSTICONGA. I propose to introduce a new MECHANICAL VOICE SYSTEM (MVS) into hollow drum shells such as the conga drum which incorporates strings within a hollow drum shell. This MECHANICAL VOICE SYSTEM allows the percussion instrument to produce specific musical notes as typically produced by other string instruments such as the acoustic stand-up bass. Another embodiment of this invention is what I call the SPRING HOUSE, a shock absorption system, which serves to minimize repetitive impact, among other functions. The ACOUSTICONGA also has a MECHANICAL TUNING SYSTEM (MTS) around the drumhead which allows for more accurate and easy tuning of the drumhead as well as the strings.

Abstract: A keyboard musical instrument includes a key, a balance rail, and a key leveling tab. The key leveling tab is permanently mounted on the balance rail. The key leveling tab is non-resonating and has a a varying thickness.

Abstract: A keyboard apparatus includes: a plurality of keys; a plurality of hammers; a first supporting portion; a second supporting portion; an interlocking mechanism. The interlocking mechanism conveys weight of the hammers respectively to rear portions of the keys, and causes an upward movement of the hammers, when front portions of the keys are depressed and the rear portions of the keys are swung upward.

Abstract: A keyboard device is designed for use in an electronic musical keyboard instrument, and composed of a key frame and at least one key array unit mounted in the key frame. The key array unit has a plurality of keys and a common base part which integrates the plurality of the keys and which is fixed to the key frame. The key is composed of a key body having a front end portion, a rear end portion and a top face portion extending between the front end portion and the rear end portion, and a key supporting part which supports the key body in a vicinity of the rear end portion thereof for allowing the key body to pivot around the key supporting part when the top face portion of the key body is pressed downward and which couples the key body integrally to the common base part. The key supporting part is formed below a back of the top face portion of the key body at a position spaced from the rear end portion of the key body toward the front end portion of the key body.

Abstract: The present invention provides a music playback and manipulation system for generating audio playback of digital musical comprising; a user control device having an external memory interface for providing access to random access memory and read only memory, a mass storage host controller for providing access to and control of data from, a user controller interface and an audio subsystem interface; a mass storage device for storing a plurality of audio files; and a user control device for varying playback parameters of said audio files.

Abstract: Keys of an acoustic piano require balancers for cancellation of a part of self weight of the action units/hammers; however, the balancers are liable to be dropped off due to the aged deterioration of the wooden bars; in order to keep the balancers stable in the keys against the aged deterioration, the balancer is plastically deformed so as to bite into the wooden bar, the balancer, which is formed with thorns, is rotated so as to make the thorns bite into the wooden bar, the balancer is shaped into a configuration different from the holes so as to exert resilient force on the inner surface in a direction in parallel to the grain of wood, or the balancer is inserted into a constricted hole so as to strongly exert the resilient force on the inner surface, thereby being prevented from the dropping off from the keys.

Abstract: A portable vapor containment structure has a support frame, at least three wheels to roll the support frame about the ground and wheel retractors for retracting each of the wheels so as to allow the frame to be lowered to the ground. Typically, the apparatus further includes an enclosed vapor containment compartment mounted upon the support frame attached to the support frame. The vapor containment compartment has a bottom opening located within the perimeter of the support frame.

Abstract: A loading tube for use in a perforating gun is disclosed which eliminates the necessity for utilization of plastic jackets to restrain shaped charges. The loading tube comprises a first tubular member and an engagement structure in the first tubular member in which the primer ends of the shaped charges may be installed. These engagement structures may be a center plate or inner tubular members. In each of the disclosed embodiments, a detonating cord connects the primer ends of the shaped charges which are installed in the loading tube.

Abstract: A trigger group assembly for a semi-automatic shotgun includes a follower pin that is slideably attached to a sliding track assembly. The follower pin engages a pair of tracks to facilitate cooperation the sliding track assembly's carrier with the shell retainer of a detachable magazine in such a way that when the bolt is propelled rearward, a cartridge is released from the magazine, and when the bolt is propelled forward, the cartridge is lifted by the carrier into the path of the bolt and loaded into the chamber of the firearm.

Abstract: An apparatus for weaponizing a mobile robotic platform with a mechanically triggered weapon and a firing circuit provides a weaponized mobile robotic platform, in which the mechanically triggered weapon can be fired in a safe, secure, and controlled manner in response to a single electrical pulse from the firing circuit.

Abstract: A system for launching a countermeasure device is disclosed. In the illustrative embodiment, the system uses an electromagnetic catapult to throw a countermeasure payload, wherein the azimuth, elevation, and propulsive force of the electromagnetic catapult are controllable.

Abstract: A cartridge feeding attachment for a firearm generally consisting of a housing attachable to the firearm having means for guiding a stack of cartridges into the cartridge chamber of the firearm along a first line of travel, a follower engageable with one of such cartridges and means disposed between the housing and the follower for biasing the follower along the first line of travel to feed a cartridge into the cartridge chamber; a sprocket supported on the housing having circumferentially spaced recesses each receiving a cartridge of a cartridge belt trained over the sprocket, and a rotational axis positioned so that upon rotational indexing thereof, a cartridge of the belt will be positioned along a second line of travel extending between the follower and a cartridge of the stack of cartridges; means displaceable along the second line of travel extending between the follower and a rearwardmost cartridge of the stack of cartridges; means displaceable along the second line of travel between a retracted positi

Abstract: A rapidly deployable portable convertible blast effects shield/ballistic shield includes a set two or more telescoping cylindrical rings operably connected to each other to convert between a telescopically-collapsed configuration for storage and transport, and a telescopically-extended upright configuration forming an expanded inner volume. In a first embodiment, the upright configuration provides blast effects shielding, such as against blast pressures, shrapnel, and/or fire balls. And in a second embodiment, the upright configuration provides ballistic shielding, such as against incoming weapons fire, shrapnel, etc. Each ring has a high-strength material construction, such as a composite fiber and matrix material, capable of substantially inhibiting blast effects and impinging projectiles from passing through the shield. And the set of rings are releasably securable to each other in the telescopically-extended upright configuration, such as by click locks.

Abstract: A double check valve having a floating function is disclosed, whereby a working device that is operated by a hydraulic cylinder having a double check valve (e.g., a dozer blade) can perform a floating function when the working device performs land readjustment of a work surface. The double check valve having a floating function includes a hydraulic pump, a hydraulic cylinder operating a working device, a control valve controlling a start, a stop, and a direction change of the hydraulic cylinder, and a double check valve installed to open/close flow paths between the control valve and the hydraulic cylinder, and having a pair of plungers dividedly formed to be shifted in opposite directions to each other when a signal pressure is applied thereto, and a pair of check valves being pressed to remove their check functions through a shifting of the plungers.