Abstract: A modular tub spout assembly for use in removably attaching a tub spout on a threadless water pipe extending outwardly from a bath wall without affecting connection of the pipe to a water supply system behind the bath wall includes a tub spout insert, a sleeve and a seal member. The insert has an interior passage, at least a portion of which is of a size to provide a close, but sliding, fit on the pipe. The sleeve has an internal diameter providing a close, but sliding, fit on the pipe and there is a chamber in the insert formed and adapted to closely fit about the sleeve exterior. The seal member is also positioned within the chamber in the insert. A fastener extends within the aligned openings in the insert and sleeve to fix the insert on the pipe. There is a tub spout shell extending over and enclosing the insert and a fastener to attach the shell to the insert.

Abstract: An inline filter having a swivel right-angle fitting for coupling an inlet or outlet tube. The fitting includes a stem having a pair of O-rings and a distal ridge and notch. The cap of the filter includes a port having a plurality of annular, resilient tabs that engage the notch and ridge to retain the fitting to the cap.

Abstract: A bibcock nozzle extension for use with an outdoor bibcock is disclosed for facilitating an easy manual connection of a bibcock's threaded nozzle to a hose. A bibcock nozzle extension has a contoured outer surface which conforms to the palm of a human hand and facilitates an easy, manual, leak-proof connection between a bibcock's threaded nozzle and a bibcock nozzle extension. The extra length provided by a bibcock nozzle extension allows a user to easily make a hose connection to a manually difficult bibcock access to provide sufficient space to manipulate the operator's hands when connecting a garden hose to the bibcock extension without touching the wall or the bibcock handle.

Abstract: A water containment and drainage device for activated sprinkler heads to limit the water damage to the buildings containing such fire or accident activated sprinkler heads. The device comprises of a sprinkler head receiving and water container portion, a drainage portion and a positioning apparatus. The sprinkler head receiving and water container portion comprises of a flexible, non-collapsible, fully posable tube whose interior forms a water receptacle area. An open end of the tube reversibly receives the activated sprinkler head into a water receptacle area formed by the interior of the tube. The other end of the tube is connected to one end of the drainage portion which comprises of a non-collapsible hose of determined length so that the water receptacle area and the interior of the hose are in continuous union.

Abstract: A fluidic connector with a leak proof connection site that includes a first larger diameter portion, a second smaller diameter portion and a deformable buckling region that forms a part of both the first and second diameter portions where the two portions join. The first larger diameter portion forms a separate inner surface for receiving a plug to securely seal off the connection site from fluid communication therethrough while the second smaller diameter portion is adapted to receive and securely seal different sizes of male adapters used for attaching a lumen. The deformable buckling region forms a structural buffer between the first and second diameter portions in order to maintain the diameter of the first larger diameter portion when the second smaller diameter portion is stretched out by prolonged insertion of a nonconforming male adaptor. In addition, an adapter is provided which permits flexibility in use and provides a redundant fluid seal, without exhibiting creep.

Abstract: A hose capable of carrying current to an indicator which provides external warning of imminent failure, or leak, due to wear occurring within the hose. The hose consists of an internal (primary) hose which is surrounded by an external (secondary) hose. Positioned in the annulus between the two hoses are two non-contacting electrical wires. At a point, the two electrical wires extend beyond and outside of the hoses. The protruding wires attach to a low voltage power source and to a hose failure indicator, or alarm, in series. When the internal (primary) hose fails, the fluid inside the hose escapes into the annulus between the primary and secondary hoses, making contact with the two electrical leads. This closes the circuit, thereby activating the external indicator, which may be a light or an audible signal or some other type of alarm. The external (secondary) hose is designed to withstand normal operating stress for a reasonable amount of operating hours until the hose can be replaced.

Abstract: A water purifier includes a quick connect connector in a port that receives a tube that carries the water. The tube is received along the axis of the port in a first reference direction along the axis. The connector is assembled by inserting, in sequence, a support ring, an O-ring, and a plug into the port along the axis, but in a direction opposite the first direction. The plug is held in place by adhesive or conventional welding. To complete the assembly, a collet is inserted into the port along the axis and in the first direction. A tube is then connected to the water purifier by urging the tube through the collet, along the axis, and in the first direction. The tube is gripped by the collet, supported by the support ring, sealed by the O-ring, and stopped against the plug.

Abstract: A hose system comprising a generally Y-shaped first hose section having first and second arm members and a faucet-connecting member, the first section further comprised of flexible walls of the first and the second arm joining the faucet-connecting member at a junction, and connectors adapted to the ends of the first arm member, second arm member, and faucet-connecting member removed from the junction for connecting the first section to either a hose or a faucet.

Abstract: A water purifier includes a port having a collet, an O-ring seal, and a support between the collet and the seal. The collet axially receives a tube for water passage. The support limits radial movement of the tube off the axis. The support has an L-shaped cross section having a radial leg that seats the O-ring, and an axial leg. Water purifiers are often installed in confined spaces near mechanical equipment. Conventional water purifiers installed with sharp bends in influent and effluent water tubes and exposed to equipment vibration conducted by the tubes often exhibit weeping at the port. In an embodiment of the present invention, weeping is eliminated by maintaining axial relation between the tube, the seal, and the collet.

Abstract: A spout-mounted water filter assembly suitable for use with a shallow sink having a short necked spout. The water filter assembly includes a water filter unit and an extension pipe which provides additional vertical clearance between the base of the sink and the outlet of the filter unit. The extension pipe may further be dimensioned to provide additional clearance relative to an inner edge of the sink in order to prevent interference between the water filter unit and the sink. The water filter assembly of the present invention is versatile and may be configured in a variety of orientations to fit a variety of sink/faucet combinations.

Abstract: A water spout seat of the water filtration device is composed of a water discharge tube, a main body, a stop valve, and a trigger member, The main body is provided with a through hole, a water inlet, a chamber, a stop edge located between the through hole and the chamber, a stop lip located between the water inlet and the chamber, and an inclined connection hole located between the water inlet and a water outlet of the main body. The stop valve is provided with a tapered washer which is engaged securely with a tapered hole of a water admitting tube. The through hole, the chamber and the water inlet are located coaxially.

Abstract: A device for cleaning teeth and gums is provided. The device has an improved adapter that is easily connected to and disconnected from a variety of different faucet nozzles. A plurality of tips may be used with the invention.

Abstract: The coupling of this invention consists of a flexible plastic housing having a body and downward extending spout. An annular sealing element is constructed from a rubber or plastic foam material, said element having a central opening which fits over the faucet and forms a friction engagement with the outer surface thereof. The body of the housing fits over the annular seal and engages the sealing element in a friction fit.

Abstract: A hub connection assembly 20 includes a hub 22 having a spout 28 extending therefrom. The assembly 20 further includes a trim nut 30 which is assembled with the hub 22 and also includes a split snap ring 32 which retains the hub with the trim nut. A lower section 26 of the hub 22 is formed with a outward facing annular recess 36 which receives a circular wall 74 of the ring 32. The ring 32 is also formed with an outward extending circular rib 68 which is located in an annular groove 48 formed in an inner circular wall of the trim nut 30. The wall 74 and the rib 68 of the ring 32 extend in a direction between the hub 22 and the trim nut 30 to maintain separation between the hub and the nut.

Abstract: A system is provided for delivering particulate material from a material storage hopper to a remote discharge station on a wheeled frame structure of an agricultural implement. The system includes a material dispensing mechanism, a connector, and an elongated material conveying tube. The dispensing mechanism is adapted to receive material from the hopper and dispense the material through an outlet conduit. The outlet conduit is directed at an angle relative to the discharge station. The conveying tube delivers material from the dispensing mechanism to the discharge station. The connector interconnects the outlet conduit to one end of the tube and has a passageway therethrough to allow material to pass from the outlet conduit to the tube. The connector is configured to direct the axis of the tube generally closer to the discharge station relative to the axis of the outlet conduit.

Abstract: A vacuum generating device, such as a wet/dry vacuum, is attached to a faucet by an attachment member. The attachment member includes a faucet connector, for connecting to the faucet, and a vacuum connector, for connecting to the vacuum generating device. The faucet connector and vacuum connector are fluidly connected by a conduit. The method for draining plumbing lines includes the step of shutting off the external supply of water to the plumbing lines. The vacuum generating device is then connected to a first faucet, and the valve to the first faucet is opened. The vacuum generating device is then activated and the valves to the remaining faucets are opened in order to create a pressure differential in the plumbing lines. The pressure differential causes water in the lines to flow into the vacuum generating device.

Abstract: A paint brush includes a receptacle at the end of the handle of the brush designed to be attached to standard water faucets, garden hoses, or other fluid sources for self cleaning. When attached to the faucet, fluid enters a hollow receptacle and then into a hollow handle and into the brush head where the fastened ends of the bristles are encased. Gaps between the bristles allow fluid to pass down into the bristles dissolving paint clinging to the bristles thus cleaning the brush. The handle can be removed from the head and the receptacle can be removed from the handle and the receptacle can be directly attached to the head to enable the receptacle and head to be attached to a faucet.

Abstract: A device for dislodging and removing matter from between and around teeth and gums through direct application of a high velocity jet of water and includes a quick disconnect coupling fitting (hereafter referred to as the "QD"), a sliding aerator, a quick disconnect plug fitting (hereafter referred to as the "plug"), a small diameter flexible tubing and a jet tip assembly. The QD replaces the standard lavatory faucet aerator. The lower end of the QD is shaped, slotted and grooved for connection to a mating plug. The plug is designed to insert and lock into the lower open end of the QD. A flexible tubing provides flow through capability and connects the plug to a jet tip assembly comprised of a handle and nozzle (jet tip). The plug, flexible tubing and jet tip assembly provide a temporary installation while the device is in use. When the device is not in use, a sliding aerator is restrained inside the QD at a lower position and functions as a normal aerator.

Abstract: A cup shaped collector mounted at one end of an elongate telescopically adjustable pole defines a water receiving chamber for receiving and containing at least a portion of an open sprinkler head and collecting water discharged from the open head. An elongate flexible hose connected to the collector communicates with the water receiving chamber and diverts water from the open head to a friendly location. Fluorescent markings on the collector aid in manually positioning the collector to receive the open head under conditions of darkness.

Abstract: This invention is regarding to a fast connection joint for pipe fitting, particularly for those applications where prevention of water spraying in large quantity is required. Its structural design allows connecting or disconnecting an external pipe or faucet, without the need to shut off the water automatically opens when a pipe or faucet is inserted into the connection joint and automatically closes when the pipe or faucet is withdrawn.

Abstract: A coupler assembly for connecting an appliance hose to a faucet spout includes a coupler body connected to the hose and having an inlet opening sized to telescopically fit over the faucet spout. A retaining collar slides over the coupler body from a hold position in retentive engagement with the faucet spout to a release position out of retentive engagement with the faucet spout. The retaining collar includes a thumb tab extending radially outwardly therefrom.

Abstract: A biasable connector structure for mixed type of faucet, which can be suitably connected with a water pipe imbedded in a wall in a resilient manner to prevent the faucet seat from being damaged and avoid leaking of water due to improper connection; the connector structure includes a hexagon nut, a spherical connector (or semispherical connector or conic connector), an O-ring, a water sealing gasket and a Z-shaped connecting pipe, whereby when assembled, the spherical connector is first extended through the hexagon nut to be screwed on the faucet seat, and then the hexagon nut is screwed with the Z-shaped connecting pipe with an inner flange of the hexagon nut forcing the spherical connector toward the Z-shaped connecting pipe, a water sealing gasket being disposed between the connecting pipe and the spherical connector, permitting the spherical connector to be biased through an angle without leaking of water.

Abstract: An improved faucet having a quick disconnect adapter, fitting for connecting a sink faucet, to a water purifier which has a body (22) defining three passageways for receiving and retaining three jointly sheathed resilient tubes. Each passageway has a separate function, i.e., supplying water to the purifier receiving and dumping overflow and metering waste flow. The tubes are held in place on a side connector (28) with a tube retainer (72). A quick-disconnect assembly attaches the fitting to the faucet adapter and includes a sleeve (50) with inwardly facing jaws (56) and a retracting collar (66) with a compression spring (68) permitting manual release or attachment by withdrawal of the jaws. A two-position valve (82) provides volume control for the waste flow and allows periodical flushing of deposits from the purifier.

Abstract: The invention relates to an insert for connecting a flexible tube to a shower head which has an axial pipe (13) and, externally, has keying (17) and sealed truing (15, 16) structure in a seat of said shower head. It has one elastic tab (19) with a tooth (20) able to clip into a hole (21') formed at the same level of said seat. The keying structure (17) prevents the rotation of the insert while the tooth prevents an axial unscrewing.

Abstract: The structure of a water faucet joint comprises a faucet having a main body integrated with a fastening sleeve, a stoppage sleeve and a conduit connector. The faucet has an inner washer recess for a stoppage-sleeve inner washer contracting therein, and an outer washer recess for a stoppage-sleeve outer washer contracting therein to press against the stoppage sleeve at its rear end. The inner washer and a coiled spring is encased in a spring-receiving recess which is formed on the interior of the stoppage sleeve. The stoppage sleeve is positioned but slidable in one way direction by the stoppage-sleeve inner and outer washers, and therebetween, a plurality of positioning holes are radially formed on the outer circumference of the fastening sleeve for a plurality of restraining members to be disposed and positioned therein.

Abstract: A water supply hose connecting device for a washing machine which is easy to couple with and release from a water tap and which is capable of preventing water leakage. The water supply hose connecting device for a washing machine includes an upper connecting member for the device in a watertight manner to a water tap, an intermediate connecting member formed with a female threaded portion so as to be threadedly coupled to a male threaded portion formed on the upper connecting member. A lower connecting member is formed with openings and a flange so as to be firmly coupled to the intermediated member. A control member is provided for controlling the coupling and releasing of the intermediate connecting member and lower connecting member.

Abstract: An adaptor is provided with a threaded end for union with a garden hose, or the like, and a conically enlarged opposite end configured to fit about a wide variety of spigots and pipe ends. A worm gear clamp tightened about the adaptor squeezes annular ribs on the interior of the conical end into sealed engagement around a faucet spout or pipe. The conical end of the adaptor includes exterior annular ridges which position and retain an adjustable band of the clamp in alignment with an interior annular rib so that the action of the clamp is focused thereupon for an improved seal. The adaptor includes an internal reinforcement web or mesh to prevent water pressure-induced swelling of the adaptor.

Abstract: An improved faucet connector has a flexible braided metal hose assembly with a water supply fitting assembly at one end and a universal faucet fitting assembly at the other end to readily connect a faucet to a water supply pipe, tubing, or shutoff valve in an efficient, safe, and structurally sound manner.

Abstract: A faucet adapter for flushing paint from portable painting equipment tubing has a first end formed of an elastomer with an internal conical recess for coupling to one of a plurality of faaucet nozzles having varying diameters and a second end having a pair of hollow external conical projections of differing diameters, each for coupling to one of a pair of matching diameter lumens in portable painting equipment tubing with the hollow projections communicating with the internal conical recess for permitting the flow of liquid therethrough.

Abstract: An inlet water line connector for connecting an inlet water line to the end of a water faucet shank having external threads on the outer cylindrical surface thereof. The body has an opening therethrough into which first end and inlet water tube of a predetermined outer diameter may be inserted. The body has an outer tapered surface for fitting within and engaging a tapered internal inlet region of the faucet shank. The outer tapered surface of the body has a forced fit with the tapered internal inlet region of the faucet shank. A retention member is disposed within the body and has a relaxed state and a holding state. The retention element remains in its relaxed state as the water line is inserted through the body whereby it is in spaced relation to the water line. The retention element is moved into its holding state after the water line has been inserted through the body to place the retention element into intimate contact with the water line.

Abstract: Apparatus for use in the bleeding of fluid systems, especially the hydraulic brake system of a motor vehicle, comprises fluid pumping equipment (1) for pumping fluid to a main fluid reservoir (8) of the fluid system via a supply conduit (24). The pumping equipment (1) includes a fluid container (6) and an air pump (2) serving to discharge fluid from the container (6) into the supply conduit (24). The pump (2) is driven through an electric circuit (C1.C2) including a fluid pressure control (14) and a fluid level control (15A) of the container (6). The delivery end of the supply conduit (24) passes through an opening (26) of the reservoir (8) which opening (26) is sealed by an elastomeric plug (18) laterally expandable by a compression device. The above apparatus considerably conveniences the bleeding of motor vehicle brake systems.

Abstract: A clamp for securing a hose connection. The clamp is a cylindrical shell which encases a hose connection and secures the connection from being disconnected by ordinary means.

Abstract: An universal coupling is described which can be connected to the outlet of a variety of water faucets regardless of the design or cross-sectional shape of the faucet outlet. In one embodiment the universal coupling can be connected a smaller faucet outlet having a maximum outlet width of about 60% of the maximum outlet width of the largest faucet outlet to which the universal coupling can be connected. The capability of the universal coupling of this invention to be connected to such a large variety of faucet outlets regardless of the cross-sectional shape thereof enables, for example, the installer of water filters to kitchen faucets to stock just the universal coupling of this invention since it will fit most all faucets commonly found in kitchens.

Abstract: An elastic hose for conducting a liquid from a source such as a water fixture or a storage container to a delivery site is disclosed. The hose includes an upper funnel-shaped portion and at least one contiguous lower cylindrically-shaped portion. The upper portion may be stretched over a water fixture, a liquid container, or the like to form a gripping leak-proof seal. The hose has a stretchability of about 400%-1,000%. The lower portion is led to a delivery site. The hose is able to conduct liquid from a source to the delivery site without spills or mess. Moreover, in the case of a leaky faucet, the hose eliminates splashing and substantially decreases the noise generated by the leaking water.

Abstract: A quick-connect coupling for a household faucet or the like and comprising a nipple and a fitting, features an improved seal which is a resilient annulus including a band portion adapted to seal against the inside of the fitting, a wing portion extending down from the top of the band portion and an end portion on the distal end of the wing portion, the end portion including an inward rib. Preferably the rib comprises an inwardly and upwardly facing quarter round, the underside of the end portion being inclined upwardly and outwardly when the fitting is installed on the nipple, whereby the water pressure forces the end portion inward to enhance the seal.

Abstract: A coupling for connecting a vehicle exhaust pipe to an exhaust conduit for removing vehicle exhaust gases has a cylindrical housing with an inlet at the front end and an outlet at the rear end, the rear end being connectible to an exhaust conduit. A bristle assembly is mounted within the housing adjacent the front end. The bristle assembly includes an annular container and a multitude of resilient bristles extending radially inwardly from the retainer towards the longitudinal axis of the housing and terminating at a position spaced from the longitudinal axis to provide a central aperture. The bristles project radially inwardly from the retainer by a distance in the range from about 4:1 to about 8:1 longer than the radial thickness of the retainer to enable the front end of the housing to be pushed over a vehicle exhaust tail pipe to cause the tail pipe to bend the bristles rearwardly into engagement with the tail pipe to produce an effective gas seal between the front end of the coupling and the tail pipe.

Abstract: A portable solvent recovery distillation apparatus for improved on-site recovery of highly flammable solvent from a batch of spent solvent. Both evaporation of the spent solvent and condensation of the purified solvent vapors are conducted within a common tank under reduced pressure conditions maintained by an air-operated vacuum pump. Heating of the spent solvent is accomplished by a hot fluid circulating in indirect heat exchange relationship with the spent solvent. The apparatus is totally non-electrical for increased safety of operation.

Abstract: An adapter to be used in conjunction with a tubular flushing device to unclog a drain pipe. The tubular flushing device expands during usage. The tubular flushing device is to fit within the adapter and is to expand during usage into tight contact with the interior wall of the adapter. The fore end of the adapter is tapered slightly to facilitate tight connection with the inlet opening of the drain pipe.

Abstract: A hose nozzle for a fire fighting kit is provided to utilize the availability of water from a sink faucet to extinguish fires in the home prior to the time fire fighters arrive. An adapter is threaded onto the sink faucet without interrupting the normal use of the faucet. The quick-attach fire fighting kit is stored nearby. The fire hose body can be quickly connected to the adapter by use of a quick connect coupler attached to one end of the hose. The opposite end of the hose body has a nozzle which can be adjusted to control the spray of water therefrom by means of a slidable valve assembly.

Abstract: Apparatus for use in painting and cleaning paint rollers comprises a paint tray and a paint tray lid which can be mounted thereon. The paint tray lid includes a top wall with a pair of side walls and at least one end wall extending therefrom. A paint roller is fastened inside the lid in spaced relationship to the top wall. A water spray manifold inside the lid extends substantially thereacross, and contains a plurality of spaced orifices across its length aimed to direct water evenly across a paint roller fastened in the lid. The force of the water impinging upon the roller causes the roller to rotate, thereby cleaning the roller. Water spraying from the rotating roller cleans the paint tray. One or more separate orifices can be provided to direct water to clean the paint roller bearings. A hose supplies water under pressure to the manifold. A channel formed within the top wall of the lid accommodates and stores the hose when the apparatus is not in use.

Abstract: Flexible tubing for use in connecting a pneumatic foot controller to a sewing machine is provided at one end with a detachable plastic connector including a tight fitting tube supporting sleeve and a serrated end fitting which is locked in place in the tubing with the sleeve.

Abstract: A locking device is provided that is useful for preventing removal of a hose coupling from engagement on a valve. The locking device comprises two clamping members hingedly joined together at one end by an interlocking joint. When in a closed position, the clamping members have a first passage for receipt of the body of the valve and a second passage for receipt of the hose coupling on the valve. When the locking device is in place with the valve body in the first passage and the hose coupling in the second passage, the clamping members are locked together at the end remote from the interlocking joint to prevent the removal of the coupling from the valve.

Abstract: A water faucet adapted to be connected to a water supply pipe comprising a soft elastic sleeve having on the inner wall thereof an upper flanged ring and a lower flanged ring which functions as a valve seat; a ball placed within the sleeve for remotely blocking the valve seat; a clamping tube disposed between a retainer ring and the sleeve; a drain pipe connected to the lower section of the clamping tube having therein a cover block comprising a cylindrical body portion and a perforated upper end plate, the interior surface of the drain pipe and cover block being provided with projections and guide teeth; and an operating lever in the form of a cylinder having its upper end extending through the cover block and the lower end extending out of the drain pipe, a rotating tube being attached to the intermediate section of the cylinder, the rotating tube having blocks provided on its circumference which are guided by the projections and guide teeth to maintain the operating lever in a raised or lowered position so

Abstract: In order to create a water pressure jet cleaner, especially for clogged sinks, which is as simple as possible, quick and handy to use and which can be used with the most widely differing water faucets, it is equipped with a connecting hose (11) with a connecting adapter (7), which can be attached by means of a clamping device (32, 27-31). A cleaning head (13) is provided at the other end of the connecting hose (11).

Abstract: A clip and method of using same are provided whereby the angle valve beneath the sink is positively coupled to the flexible connector tube leading to the faucet to prevent the tube from working out of the slip-joint of the angle valve over a period of time.

Abstract: A securing device for attaching and holding a press plate spigot to a base member of a filter press. The device includes lugs which are received through openings in the spigot, the lugs being attached to the base member levers having a crank arm made up of protruding portions and a cam surface and having the protruding portions received in cutouts of the lugs so that levers are rotated about an arc for having the cam surfaces urge and hold the spigot against the base plate.

Abstract: A hose-mounted faucet-connector having an integral inner and outer housing, the outer housing at one end being connectable to a hose and at the mounting end having the inner housing integrally mounted across the remaining other mounting end sealably thereof except for a mounting aperture centrally within the body of the inner housing that extends concavely within space of the outer housing, the inner walls of the outer housing including spaced-apart ribs extending substantially axially of tubular space from the one end to the integral inner housing at the mounting end of the outer housing; in a preferred embodiment, the faucet mount is mounted on a valve-containing hose that is mounted on an inlet-outlet structure of the pressurizable vessel.

Abstract: A quick connect-disconnect attachment for faucets for delivery of liquid therefrom through an extension hose. The attachment is retained by pneumatic pressure created by a hand-operated bulb. A valve permits release of the pressure therein for removal of the attachment.

Abstract: The removable two-way connector is designed for faucets with a nozzle for feeding auxiliary apparatus, such as shower heads, massage devices and the like. It comprises a body with an annular wall divided into four segments and defining a cavity in which a deformable packing sleeve is disposed. The wall has a peripheral wall forming a spiral camming face at each wall segment. A rotary cover caps the cavity and has radially inwardly extending ribs with cam follower faces engaging the spiral camming faces. When the cover is turned, the wall segments are forced radially inwardly by the displacement of the cover ribs along the camming faces whereby the inwardly forced wall segments are pressed against the adjacent deformable sleeve and the sleeve sealingly engages a nozzle surrounded thereby.

Abstract: A device for joining detachably a tubular member such as a hose, a pipe or the like to a main body which has at its end a cylindrical pipe and a flange which is formed along the outer periphery of said cylindrical pipe and whose peripheral surface is formed with screw threads. One end of an inner cylindrical pipe is connected to the flange of said main body in such a way that the inner cylindrical pipe may freely rotate about said cylindrical pipe. The inner cylindrical pipe is formed with a plurality of through holes which are circumferentially spaced apart. And an annular space is radially defined between the inner cylindrical pipe and the cylindrical pipe of said main body. Rolling elements are rotatably fitted into respective through holes of said inner cylindrical pipe.