Abstract: A tubular tool includes a tubular first part and a tubular second part. The tubular first part including a first section having an engaging hole defined in the distal end thereof, and a second section having a connection hole defined in the distal end thereof so as to be respectively connected to a driving tool and an object. The tubular second part is rotatably mounted to the first outer periphery of the first section of the first part. At least one lip extending from the inner periphery of the tubular second part. At least one first circular rib extends outward from the first outer periphery of the first section. The at least one lip is engaged with the at least one first circular rib to restrict the second part from separating from the first prat.

Abstract: A heater for shrink fit chucks has a heating cover, a blocking piece, and an adjustable blocking set. The heating cover has a first through hole, a second through hole, and a heating space disposed within the heating cover, extending along an extending direction to form the first through hole and the second through hole, and communicating with a heat gun. The blocking piece is detachably connected to the heating cover to block the first through hole and has a communicating hole capable of communicating with the first through hole. The adjustable blocking set is connected to the heating cover and has two blade assemblies and a switching component. Each blade assembly has blades disposed annular along the extending direction. The switching component is rotatable and capable of pushing the blades to move toward or depart from each other for blocking the second through hole.

Abstract: The invention relates to an intermediate piece 101 intended to be interposed between a connector 8 that is able to carry a wiper and a connecting element 203 of a driving arm, the connector 8 comprising at least one receiving bearing 15 for receiving a first shaft 102, the connecting element 203 comprising at least one receiving orifice 215 for receiving a second shaft 103, characterized in that the intermediate piece 101 is equipped with the first shaft 102 and the second shaft 103. Application to motor vehicles.

Abstract: A method of removing material from an airfoil includes engaging a root of the airfoil within a root-securing fixture, engaging a tip of the airfoil within a tip-securing fixture, and removing material from the airfoil. The method further includes disengaging the tip of the airfoil from the tip-securing fixture to allow movement of the tip from a clamped state position to a free-state position. The method further includes reengaging the tip of the airfoil within the tip-securing fixture in the free-state position, and removing additional material from the airfoil.

Abstract: A tool includes a first body, a rotary member, a positioning unit and an engaging unit. By the positioning unit and the engaging unit, the rotary member is positioned relative to the first body with dual-positioning feature. When the first body is rotated, the rotary member is positioned by the positioning unit and the engaging unit. The rotary member is not likely to freely rotate because both of the positioning unit and the engaging unit fail when using the tool.

Abstract: A tool structure includes a base, a first retaining member, a connecting rod, a second retaining member, and a threaded rod. The first retaining member is received in the base. The second retaining member is received in the connecting rod and engages the first retaining member so that the connecting rod is limited in the slot of the base. Thus, the connecting rod is rotated relative to the base to adjust different angles between the connecting rod and the base. In addition, the connecting rod has a first mounting hole and a second mounting hole so that the connecting rod is available for two kinds of screwdriver tips with different sizes.

Abstract: An emergency access tool is designed to unfold into unique geometrical shapes that allow for the tool to act as a Class 1 lever to access a locked privacy partition stall door from the outside area thereof. The tool provides a handle to impart input force, a shaft rotatable out of a collapsed position of storage within the handle into alternative fixed operating positions with respect to the handle, a proximal portion of the shaft having a reduced diameter intermediate section, the intermediate section providing a fulcrum point where leverage is achieved while the tool is inserted within the door seam of the partition, and a distal end section which maintains a substantially perpendicular orientation with respect to the shaft during use of the tool. The end section of the tool is sized and adapted to make contact with the interior door lock of the partition and impart the output force necessary to unlock the lock latch and allow entry into the privacy partition stall.

Abstract: A multi-functional car power receptacle having a lifesaving tool includes a handle for providing a receptacle and a function head connected to a front end of the handle. The function head comprises a glass smasher and a power plug. The function head and the front end of the handle are connected through a rotation shaft, enabling the function head to pivot about the rotation shaft for changing an end of the function head to be used. The power plug is electrically connected with the handle through electric wires of the rotation shaft. The function head of the present invention combines the glass smasher with the power plug. The present invention is provided with a seat belt cutter for the driver to cut the seat belt in an emergency. The handle is provided with a magnet and a warning light.

Abstract: A wedge anchor driver comprising: a first member having a first opening configured to fit onto the nut of a wedge anchor and a second opening configured to receive a predetermined length of the outer end of the wedge anchor's bolt; and a second member associated with the first member, wherein the second member's distal end is configured to fit, and be lockable, into the chuck of a hammer drill, such that, after the wedge anchor driver is locked into the chuck of the hammer drill, a user can drive the wedge anchor into a corresponding hole with the hammer drill in hammer mode and then tighten the nut of the wedge anchor by switching the hammer drill from hammer mode to drill mode.

Abstract: The anchor bolt driver tool is a tool uniquely configured to attach between a chuck of a hammer drill and a socket such that said tool is able to drive an anchor bolt into concrete. The anchor bolt driver tool includes a first distal end that includes a square-drive socket that is configured to connect with a socket. A second distal end of the anchor bolt driver tool includes a hammer drill chuck member. The hammer drill chuck member includes a series of longitudinally oriented grooves that are provided in order to be gripped via a hammer drill chuck.

Abstract: An adapter to convert an electric drill motor being configured with a standard drill bit into a screw gun includes a metal enclosure which slides over a drill chuck to accommodate drill bit and chuck portions. The device also provides a mechanical coupling pin which engages a chuck key aperture to communicate the rotary motion of the drill motor to the device. Once installed upon the drill motor, the device enables connection of standard bit sockets, screwdriver adapters, or similar driving tools. In such a manner, the user can drill a hole, slide the device over the drill chuck, and drive a fastener using the device. This eliminates the need to remove the drill bit and insert a separate driving tool in a repetitive manner to install fasteners.

Abstract: A tool includes a chuck connected to a handle. The chuck includes a mandrel including a non-circular cavity defined therein, a slit in communication with the non-circular cavity, a first bore in communication with the non-circular cavity, and a second bore in communication with the slit. A bit with a non-circular profile can be inserted in the non-circular cavity. A flat bit can be inserted in the slit. A ball is located in the first bore. A pin is located in the second bore. A movable sleeve is located around and movable along the mandrel and formed with a thread. A rotary sleeve is rotationally located around the mandrel and formed with a thread engaged with the thread of the movable sleeve. By rotating the rotary sleeve, the movable sleeve pushes the ball into the non-circular cavity and the pin into the slit.

Abstract: An anchor installation tool has an elongated driving member with a body portion and a head portion. A retaining mechanism retains the anchor installation to the drill bit. The mechanism has a housing on the body portion with a pair of bias lugs that project through the body portion to contact the drill bit. An anchor guide slides on the body and head portion and has a holding member to hold an anchor. The anchor is held in the anchor guide and a drill bit is inserted into the driving member. Axial movement of the drill bit is transferred into axial movement of the driving member. The movement strikes the anchor and ejects the anchor from the anchor guide into a surface.

Abstract: A drill wrench for driving drill steels, drill bits, and bolts during drilling and bolting operations is disclosed. The drill wrench may include an internal driver for driving a drill steel. The internal driver may be inserted in an internal-drive recess defined within an end of the drill steel. When the drill wrench is rotated, the internal driver may drive the drill steel by engaging at least one surface within the end of the drill steel. The drill wrench may also include an external support member that supports the drill steel during drilling. The external support member may also drive the drill steel by engaging an outer peripheral portion of the drill steel when the drill wrench is rotated.

Abstract: A work piece carrier is provided with two reference systems for accurately positioning it with regard to a chuck member. The work piece carrier comprises a central aperture with the two opposite ends of the aperture surrounded by one of the reference systems. The two reference systems are independent from each other and allow the work piece carrier to be attached to the chuck member in two different positions. Assigned to each reference system is a protrusion surrounding the central aperture and extending substantially in the direction of the central longitudinal axis of the work piece carrier. The particular protrusion is provided with a shoulder serving as a clamping surface, adapted to be engaged by clamping elements provided in the chuck member. Preferably, also the centering elements for defining the position of the work piece carrier with regard to the chuck member are located on the particular protrusion.

Abstract: An apparatus includes a rotatable device, which may be a keyless chuck, a keyless chuck adapter, a collet chuck, a collet adapter, a set screw bit retaining chuck, or a set screw bit retaining adapter. The rotatable device is configured to be mounted to a power tool for rotational driving of the rotatable device. The rotatable device is configured to receive a first bit device detachably mounted in the rotatable device for powering rotational movement of the first bit device. A mounting section having at least one flat secant side is defined on the rotatable device, which is capable of being rotatably driven by the power tool. The mounting section includes at least one locking mechanism on it. The generally cylindrical mounting section is adapted for insertion in and engagement with a bit holding attachment.

Abstract: A power tool combination includes a power driving device having a chuck device attached to a barrel for engaging with a driven tool member, a control ferrule engaged onto the barrel, and a non-circular member, and a tool device includes a housing having a bore for receiving the driven tool member, and having a compartment for receiving the barrel, and having a non-circular engaging member for engaging with the non-circular member and for allowing the housing to be rotated by the power driving device. The tool device includes a tool element attached to the housing, and a securing device for detachably attaching the tool element to the housing.

Abstract: The invention relates to a tool system which includes an exchangeable rotary tool for electric hand-held machine tools, preferably with a drill and/or hammer function, in particular for an electric hammer drill, and an electric drill, in particular a percussion drill. The tool system also includes at least two tool holders that are embodied as tool fittings that are associated with the hand-held machine tools and are different types. The rotary tool has an insertable shaft to be accommodated in the respective tool holder of the hand-held machine tools, the shaft having at least two slaving ribs that are diametrically opposed and that extend along the shaft for rotational engagement. The tool fitting of a first type is embodied as a positive fit fitting and another tool fitting of the second type as a multi-jaw clamping chuck. The slaving ribs have a width and a height such that, in the clamped state, they are at a lateral distance from the clamping jaws of the multi jaw clamping chuck.

Abstract: A tool includes a pair of spaced apart substantially parallel arms carrying a mounting member to which are detachably connected axially oriented driver and drill elements. The mounting member is moveable along the arms reciprocally between a first position where it is manually rotated to select the axial orientation of the driver and drill elements and a second locked position to hold the driver and drill elements in a selected axial orientation until the mounting member is return to the first position. The locking function is provided by a spring element actuated upon the mounting member being moved from the first position to the second position to apply pressure against the mounting member while in the second position.

Abstract: A method and apparatus for forming apertures and inserting fasteners in a workpiece is disclosed. One embodiment relates generally to a bit holder device for forming apertures and inserting fasteners into a workpiece. This embodiment comprises a tool bit, a hex holder member, an adapter hex member, a double collet member, a collet retention cap and a drill bit. The drill bit is capable of drilling an aperture into a workpiece whereupon the drill bit, the collet retention cap, the double collet member and the adapter hex member are removed from the hex holder member thereby, allowing the tool bit to forcibly insert a fastener into the workpiece.

Abstract: A tool retaining device includes a housing having an engaging hole and having a chamber for slidably receiving a tool stem, the tool stem includes a socket opening for receiving a tool member which is also slidably engaged in the engaging hole of the housing, for allowing the tool member to be rotated by either the tool stem or the housing. The tool member may also be moved relative to the housing for changeably coupling tool members or tool bits having different lengths, and may be selectively moved into the housing, for allowing another tool element to be selectively engaged with the engaging hole of the housing when the tool member is moved into the housing.

Abstract: A tool for a power drill allows fast and convenient loading and unloading of a screw bit, drill bit, or other implement. The user preferably loads the tool with the necessary implements which are then carried with the tool. Each received implement is movable from a storage position to an in use position in drive engagement with the power drill or power screwdriver. The desired implements can rapidly be changed from one to the other, while the implements are retained on the tool.

Abstract: A tool adapted to be coupled to a power drill includes a multi-component bit mounted to reverse positions so that in one position its drill element drills a hole and in another position its driver element drives in a fastener.

Abstract: An arbor (20) for a tool is provided. The arbor includes a shaft (22) and a locking mechanism (24) operatively coupled to the shaft. The arbor also includes an adapter (26) removably coupled to the shaft by the locking mechanism, the adapter being selectively configurable within the shaft between at least a first operating position, where the adapter is configured to secure a first tool accessory (62, 66, or 72) to the arbor, and a second operating position, where the adapter is configured to secure a second tool accessory (62, 66, or 72) different at least in part from the first tool accessory.

Abstract: A tool employs a connect-disconnect coupling for a power drill to hold a multi-functional bit having at its one end a drill element adapted to form a hole and a countersink and at its other end a driver element to drive a screw or other type of fastener.

Abstract: A reversible drill/driver tool includes an elongated socket having a bifurcated part defining a tool-receiving space to receive a two-ended tool that includes first and second driving bits and a rod having two opposite ends connected respectively to the first and second driving bits, and pivoted to the bifurcated part so as to be rotatable relative to the socket and so as to dispose a selected one of the first and second driving bits outwardly of the space. A positioning member is slidable on the socket to position the rod at a desired position.

Abstract: An insertable tool connector includes a drive body, a bushing, a locking plate, a restoring spring, a positioning ring, and a push ring. Thus, the insertable tool connector that can be used to connect the tools of different types, such as the saw blade, the screwdriver head or the like, thereby enhancing the versatility of the insertable tool connector. In addition, the tool can be mounted on and detached from the drive body of the insertable tool connector rapidly, thereby facilitating the user operating the insertable tool connector.

Abstract: A chuck apparatus is provided for holding a tool bit. The tool bit includes a drill, two blades, another working head and an annular groove defined therein. The chuck apparatus includes a socket, a ball detent, a collar and a joint. The socket defines an axial hole, a peripheral hole communicated with the axial hole and two slots for receiving the blades. The ball detent is put in the peripheral hole for insertion in the annular groove. The collar is movably mounted on the socket between a locking position for pushing the ball detent into the annular groove and a releasing position for allowing the ball detent to leave the annular groove. The joint includes a first section secured to the socket and a second section for connection with a motor.

Abstract: A chuck device includes a body having a slot in a first end thereof and a hole is defined radially in the body and communicates with the slot. A spring is mounted to the body and is biased between a stepped shoulder on the body and a movable clamp connected to the body. A connection rod is connected to a second end of the body. A positioning pin is movably inserted in the hole and an end of the positioning pin extends from the hole and has a tapered periphery. A sleeve is slidably mounted to the body and has a first tapered inner periphery for being matched with the tapered periphery of the positioning pin. A second tapered inner periphery is defined in a second end of the sleeve so as to push the movable clamp when sliding the sleeve by compressing the spring.

Abstract: A drill and drive apparatus includes a tube assembly which defines a tool chamber. The apparatus further includes a tool holder which is configured to be at least partially received in the tool chamber of the tube assembly. The tool holder includes a holder body defining a first tool recess and having (i) a first section with a first width and at least one ball aperture communicating with the first tool recess, and (ii) a second section with a second width less than the first width. The tool holder further includes a first tool locking mechanism at a first end portion thereof.

Abstract: A reversible drill/driver tool includes an elongated socket having a bifurcated part defining a tool-receiving space to receive a two-ended tool that includes first and second driving bits and a rod having two opposite ends connected respectively to the first and second driving bits, and pivoted to the bifurcated part so as to be rotatable relative to the socket and so as to dispose a selected one of the first and second driving bits outwardly of the space. A positioning member is slidable on the socket to position the rod at a desired position.

Abstract: A chuck includes a driver disposed on a chuck body and in engagement with the jaws so that at least one of rotation and axial movement of the driver with respect to the body opens or closes the jaws. A first detent is disposed in the body in communication with the jaws. At least one of the jaws defines a catch at a predetermined position so that the catch engages the first detent when the jaws are at a predetermined position on the body with respect to a chuck bore.

Abstract: A chuck includes a generally cylindrical body and a plurality of jaws reciprocally disposed in the body in communication with a central bore in the body. A first detent extends radially into the central bore and is releasable in a radially outward direction. Upon insertion of an elongated tool shaft having a polygonal cross section into the bore so that a groove in the tool shaft is aligned with the first detent, the first detent engages the groove and axially retains the tool shaft. Upon movement of the jaws so that the jaw faces engage flat sides of the tool shaft, the jaws rotationally retain the tool shaft.

Abstract: A chuck includes a driver disposed on a chuck body and in engagement with the jaws so that at least one of rotation and axial movement of the driver with respect to the body opens or closes the jaws. A first detent is disposed in the body in communication with the jaws. At least one of the jaws defines a catch at a predetermined position so that the catch engages the first detent when the jaws are at a predetermined position on the body with respect to a chuck bore.

Abstract: A holder for holding a tool bit having an elongated connector means with a first end and a second end. The elongated connector means has a central longitudinal hole, of a cross-section corresponding to the cross-section of a mounting portion of the tool bit, at the first end, and a tool mount at the second end, and where the elongated connector means has a first circumferential groove adjacent the second end and a second circumferential groove adjacent the first end. A first sleeve is arranged to reciprocally slide over the connector between a first end position and a second end position, where the first sleeve has a third end facing the tool bit and a fourth end facing the hand tool.

Abstract: A tool holder comprising an elongated connector means having a first end and a second end, where the elongated connector means has a central longitudinal hole, of a cross-section corresponding to a cross-section of a mounting portion of the tool bit, at the first end, and a tool mount at the second end, and a first sleeve arranged to reciprocally slide over the connector means between a first end position and a second end position, the first sleeve having a third end facing the tool bit and a fourth end facing the hand tool.

Abstract: A drill and drive apparatus includes a tube assembly which defines a tool chamber, the tube assembly including a shank adapted to be received within a chuck of a drill. The apparatus further includes a tool holder which is configured to be at least partially received in the tool chamber of the tube assembly, the tool holder having (i) a first tool locking mechanism at a first end portion thereof, and (ii) a second tool locking mechanism at a second end portion thereof. The drill and drive apparatus further includes a tube locking mechanism which is configured to releasably lock the tool holder to the tube assembly when the tool holder is at least partially received in the tool chamber.

Abstract: The invention relates to a tool system that can be coupled to the drive shaft of a lathe. Said system comprises a tool holding fixture which can be connected to the lathe, and a took which is stored in a polygonal recess in the tool holding fixture so as to be torsion-proof yet removable. This tool has a tool shank and at least one functional section extending coaxially therefrom. The tool rests axially on a centering area in the polygonal recess, and rests radially on several identical locking elements. These are arranged in radial cavities in the tool holding fixture, at equal angular distances and at an axial distance from the centering area. This enables centering of the tool in the tool holding fixture.

Abstract: A quick-connect tool change system for hand drills comprising a) a first, two ended, magnetic bit holder element fitting a chuck, b) at least one second working tool element slidingly fitting over the first bit holder element and having retaining means, The first bit holder element can comprise a natural magnet or an electro magnet selectively energized from a direct current source. A hand drill with a means to provide and transmit electric current to the electro magnet is also provided.

Abstract: An improved two-ended reversible drill/driver tool for use with power drills. The tool having a hollow cylindrical socket that at one end has a drive shank for insertion into a chuck of a powered drill, and, at the opposite end, has a polygonally shaped opening therein for receiving a correspondingly shaped, two-ended, reversible tool assembly. This tool assembly is sized to slide within the hollow socket, and has a combined drill bit and countersink at one end, and, at the other end, a polygonally shaped opening for accepting a screw driver bit having a shank with a polygonal cross section.

Abstract: A tool holder (10) is proposed for tools inserted into machines for drilling and/or percussion operation having means for rotational driving and axial locking of a tool shank which can be inserted into a tool receptacle (11) of the respective machine, wherein a plurality of axial strips (13) which project inward radially are provided for rotational driving and at least one radially lockable locking body is provided at the tool holder (10) for locking. In order to accommodate tool shanks of two grooved shank systems with different outer diameters, two axial strips (13) which are located opposite from one another and are directed inward radially are arranged at the receptacle bore (12). The axial strips (13) are guided such that they can be released outward radially, particularly in a springing manner, wherein the axial strips (13) engage in corresponding grooves (20) of the respective inserted tool shank (19) for rotational driving.

Abstract: A universal driving and setting tool is used to drive and set an anchor, such as a concrete anchor, having an anchor sleeve and an anchor slug positioned within a bore formed in the anchor sleeve. The driving and setting tool includes an attachment that fits over standard drill bits used in a hammer drill for drilling a hole in a substrate, such as concrete, in which the anchor is set. The attachment engages an end of the drill bit and can fit over drill bits having different lengths and having shanks of different shapes. The driving and setting tool also includes a reversible adapter that is positioned in the attachment in either a first or second position. In a first position, an anchor sleeve hammering portion on the reversible adapter faces outwardly to hammer the anchor sleeve into the hole within the substrate.

Abstract: In the case where a product having a free-curved surface is obtained, a machining work is performed by separate machine tools. Therefore, works of attaching and removing a half-machined product are necessary. Consequently, a lot of working time and labor are required. Also in an automatic production system, productivity is lowered if the system is stopped by failure in gripping during the attaching and removing works and an enormous equipment cost is required. A machining apparatus M comprises a main chuck head 1 having a control axis for holding and rotating a long bar member W, a head stock assembly 3 having three or more control axes, and a bar member feeder 5 for feeding the long bar member W to the head stock assembly 3. These four axes are simultaneously controlled to manufacture a plurality of products V having free-curved surfaces from the long bar member W.

Abstract: A method of securing sheet material to a support by means of a screw threaded fastener having a driving head adapted to drivably cooperate with a driving tool such that operation of the tool causes rotation of the fastener and enables the fastener to be driven into the support. The method is characterized in that a hole is formed through the sheet material by means of a drill bit attached to the driving tool so as to drivably cooperate with that tool in the same manner as the fastener drivably cooperates with the tool. The drill bit is removed from the tool after formation of the hole and is replaced by a fastener which is then driven into the support by the same tool so as to secure the sheet material to the support. The drill bit is characterized in that it has a drilling feature in the form of a substantially flat plate extending outwardly on each of two opposite sides of the rotational axis of the drill bit.

Abstract: An improved two-ended reversible drill/driver tool for use with power drills. The tool having a hollow cylindrical socket that at one end has a drive shank for insertion into a chuck of a powered drill, and, at the opposite end, has a polygonally shaped opening therein for receiving a correspondingly shaped, two-ended, reversible tool assembly. This tool assembly is sized to slide within the hollow socket, and has a combined drill bit and countersink at one end, and, at the other end, a polygonally shaped opening for accepting a screw driver bit having a shank with a polygonal cross section.

Abstract: The combination tool of this invention positions a screwdriver in the chuck of an electric drill and frictionally fastens an auxiliary chuck to the portion of the screwdriver extending from the electric drill. A drill bit is placed in the auxiliary chuck and a pilot hole is drilled. The auxiliary chuck is then pulled off of the screwdriver and the exposed screwdriver is used to thread a screw in the pilot hole. The auxiliary chuck with its drill bit may then be pushed back on the screwdriver to drill another pilot hole, and the process repeated as desired.

Abstract: The invention relates to a dual tool-carrier for hand drills with the following features: two shafts are provided each for mounting one tool e.g. drill chuck, screw attachment etc.;the shafts form an angle with one another which swivels the tool not being used out of the working area;a fixture is provided, said fixture frictionally connects alternately the axes with the driving shaft of the drill.

Abstract: An improved two-ended reversible drill/driver tool for use with power drills. The tool having a hollow cylindrical socket that at one end has a drive shank for insertion into a chuck of a powered drill, and, at the opposite end, has a polygonally shaped opening therein for receiving a correspondingly shaped, two-ended, reversible tool assembly. This tool assembly is sized to slide within the hollow socket, and has a combined drill bit and countersink at one end, and, at the other end, a polygonally shaped opening for accepting a screw driver bit having a shank with a polygonal cross section.

Abstract: A drill includes: a drill housing having a chuck collar of the drill made as a polygonal prism or a cylindrical collar having at least a secant flat surface formed thereon, a central drilling tool axially mounted in the drill housing, and a sleeve member having a hollow bore portion centrally formed through the sleeve member, having a coupling adapter formed on a proximal end of the sleeve member concentrically detachably secured to the chuck collar of the drill housing and having a screw driver member detachably mounted on a distal end of the sleeve member, whereby upon coupling of the sleeve member secured with the screw driver member onto the chuck collar of the drill, the hollow sleeve member on the drill will encase the central drilling tool previously axially mounted in the drill housing without first dismantling the central drilling tool for convenient replaceable uses of the drill.

Abstract: Disclosed is a bidet attachment for mounting on a standard toilet. A nozzle is mounted on the underside of the toilet seat. Water is supplied to the nozzle through a conduit from a water supply pipe. The conduit is connected to the pipe with a T-tap having two halves. The two halves are bolted together and a hole is drilled through the pipe using a special tool. The conduit is secured to the T-tap with a crimping collar that slides over a tapered extension on the T-tap. Water flow rate is controlled by a cam valve. The cam valve can be opened and closed with a control handle to place a selected amount of squeeze on the conduit to allow a selected amount of water to flow through the conduit.