Abstract: A clamping unit includes a case with a contact surface, an operation member arranged movable in a pressing cancellation direction and a pressing promotion direction relative to the case, a pressing body arranged in a movable manner in the case to oppose the contact surface, and a movable body between the pressing body and contact surface. At least one of the contact surface, movable body, and pressing body includes an inclined surface. The inclined surface increases a protruding amount of the pressing body from the case when the movable body changes in position as the operation member moves in the pressing promotion direction and eases pressing of the movable body against the pressing body when the movable body changes in position as the operation member moves in the pressing cancellation direction to permit a decrease in the protruding amount of the pressing body from the case.

Abstract: A baffle for a block-type heat exchanger comprising a baffle plate. The baffle plate comprises a first surface and a second surface being parallel to a baffle plane located between the first surface and the second surface. The baffle plate comprises a first longitudinal edge, a second longitudinal edge, a first transverse edge and a second transverse edge. The baffle comprises a resilient member at the second longitudinal edge. The baffle comprises a reinforcement extending away from the baffle plane.

Abstract: For a flexible fastening, a fastening device for fastening a column to a support device comprises: a column plate which can be fastened to one end of the column and an accommodation device which can be fastened to the support device. The accommodation device has a longitudinal shape with a longitudinal direction and a predetermined length in the longitudinal direction and a cross-section, whereby an accommodation space configured to accommodate the column plate in a manner shiftable in the longitudinal direction and in an exactly fitting manner in the direction perpendicular to the longitudinal direction is formed. The fastening device comprises a fastening member configured to fasten the column plate to the accommodation device along the longitudinal direction, and, in the longitudinal direction, the column plate has a dimension which is smaller than the predetermined length in a state mounted in the fastening device.

Abstract: A connection assembly comprises a first and second components having respective first and second engagement portions, and a third component. The first and second components are adapted to be engaged together via the first and second engagement portions such as to define a space therebetween. The third component is adapted to be longitudinally introduced in the space and to forcibly displace the first and second engagement portions outwardly, thereby connecting the first and second components together. Furthermore, a method comprises assembling the components and longitudinally introducing the third component in the space to forcibly displace the first and second engagement portions outwardly, thereby connecting the first and second components together.

Abstract: A threaded coupling comprises a first coupling member, a second coupling member and a locking assembly. The locking assembly comprises a locking member comprising a pin portion fixed to a flexible cable portion, and a lock nut. When the first coupling member is coupled to the second coupling member the locking assembly is arranged to restrict radial, circumferential and axial movement of the pin portion.

Abstract: A gas turbine engine assembly includes a shield that has a first portion and a second portion. The first portion extends radially from an axial end portion of the shield and includes a blade outer air seal contact surface. The second portion extends axially from a radially outer end of the first portion and includes a vane contact surface.

Abstract: A weighting system for a swimming pool step assembly includes a pair of weights, a removable cap for each of the weights, and means for removably mounting the weights to the exterior sides of a swimming pool step assembly. The weighting system described herein is easily installed and removed by the user without having to remove the weights from underneath the pool step assembly.

Abstract: A securing part structure of a turbine nozzle provided with a plurality of turbine nozzle segments, each having a plurality of stator vanes, arranged annularly around an axis of a jet engine and secured between a turbine case and a shroud of the jet engine, wherein in the turbine nozzle segment, an arc-shaped outer band coupling distal ends of the plurality of stator vanes to each other is provided, a hook of the outer band is engaged with a nozzle support groove of the turbine case from behind, a recessed portion of the outer band is fitted with an anti-rotation tab from behind, and an anti-rotation slot formed in the shroud is fitted with a protruding portion from behind so that the turbine nozzle segment is secured between the turbine case and the shroud. Reduction of performance loss and extension of a life of the turbine case can be realized.

Abstract: A tractor-mounted front loader includes a parking stand mounted to each of a pair of downwardly and forwardly inclined arm sections coupled to an implement resting on the ground. Each parking stand includes a support leg and a brace, the latter having a rear end pivotally mounted to a location approximately halfway between opposite ends of the support leg and an forward end pivotally mounted to a lower region of an associated loader arm section. The support leg and brace may be stored on the loader arm section by folding them together with a catch carried by the brace becoming releasably engaged with the support leg. The folded support leg and brace are then pivoted against the loader arm section and secured to it by a releasable latch which secures the top of the support leg to the arm section to establish a stored position.

Abstract: A positioner used to fasten a pair of structural members together includes side walls, lateral flanges extending from the side walls, and an interior web interconnecting the side walls. Each side wall is interconnected at vertices to one of the lateral flanges and to the interior web, and the interior web includes web sections interconnected at a vertex to each other. Each vertex interconnecting one of the side walls with the interior web terminates at a void extending between adjacent portions of the one of the side walls and the interior web, and the vertex interconnecting the web sections is displaced from the lateral flange surfaces so as to avoid contact with a positioner supporting surface. A support frame and a fastening process utilizing such a positioner are also discussed. The positioner is particularly suitable for use in constructing photovoltaic panel supports.

Abstract: A system and method for a quick release of a second object from a first object, e.g., quick release of hurricane panels (second object) from the inside of a habitable structure (first object). A stepped quick release bolt assembly or a dual quick release car assembly may be employed. In the preferred embodiment, a pin passing through a cross bored hole in a stepped bolt disposed in a receiving structure attached to a first object is releasable in order to disconnect the second object from the first object.

Abstract: A windshield wiper arm bracket includes a pair of side walls. Each of said side walls include at least one centrally located pin arm receiving hole formed therein. The bracket also includes a post attaching the pair of side walls together. The post is for receiving a pin arm adaptor thereon. The bracket also includes an attachment arm formed on a bottom of each of the pair of side walls. The attachment arms are for connecting the bracket to a windshield wiper assembly. An adaptor for a windshield wiper arm bracket includes a top portion and a web portion. The web portion includes a central aperture formed therein. The central aperture includes a first portion for receiving a post of the windshield wiper arm bracket and a second aperture for receiving a pin arm of a windshield wiper arm.

Abstract: A connector includes a first portion having a shank defining an axis and a pair of flanges defining a receiving space therebetween, the pair of flanges extending from the shank substantially perpendicular to the axis. A second portion of the connector is movable relative to the first portion along the axis between a first position and a second position corresponding to a first configuration and a second configuration of the connector. The second portion includes at least one lobe that does not extend into the receiving space between the pair of flanges of the first portion when the connector is in the first configuration. The at least one lobe extends into the receiving space between the pair of flanges of the first portion when the connector is in the second configuration. The connector can be part of a mounting arrangement for mounting a component to a bracket.

Abstract: A connection mechanism is configured in particular for the connection of armrests to cosmetic tables or cosmetic chairs. The mechanism includes a base element (1). The base element (1) has a fastening section (1a) for fastening to a piece of furniture, in particular a piece of furniture for sitting or reclining. The base element also has a fastening element (2) configured for attachment to a part to be connected to the piece of furniture, in particular an armrest. The fastening element (2) is configured for a detachable connection to the fastening section (1a). The fastening section (1a) has a receiving device (1b) for receiving a region (2b) of the fastening element (2). A securing device (3) is provided that engages in the receiving device (1b) in the region (2b) of the fastening element (2) when said fastening element is received therein.

Abstract: An external flap connection assembly for a turbine engine nozzle has a track frame, a slider track, and an external flap. The external flap is removably connected to the slider track via a retaining member which has a slider block.

Abstract: A quick connect/disconnect coupling for securing an agricultural implement, such as a stalk stomper, to a tool bar assembly on a tractor, without the need for any tools. The tool bar assembly includes a bracket having a pair of spaced-apart arm members. Each arm member has a recess therein, and a hole spaced therefrom. The recesses and the holes are generally transversely aligned. A pin is adapted to be received in the holes. The agricultural implement assembly includes a plate member. Provided on the plate member is a cross bar. The cross bar is adapted to be engaged in the recesses. To connect the agricultural implement assembly to the tool bar assembly, the cross bar is engaged in the recesses and the agricultural implement and the pin can be inserted into the transversely aligned holes to connect the agricultural implement to the tool bar assembly. A spring member biases the implement to pivot away from the plate member.

Abstract: A flame holder system includes a modified torch body and a ceramic flame holder. Catch pin(s) are coupled to and extend radially out from the torch body. The ceramic flame holder has groove(s) formed in its inner wall that correspond in number and positioning to the catch pin(s). Each groove starts at one end of the flame holder and can be shaped to define at least two 90°turns. Each groove is sized to receive one catch pin therein when the flame holder is fitted over the end of the torch body. The flame holder is then manipulated until the catch pin(s) butt up against the end of the groove(s).

Abstract: An improved structure to fix an inflatable and elastic motion body includes an elastic air bag, a frame, a base and a plurality of restricting pieces. The base has a receiving slot recessedly formed close to a top surface of the base, and a recessed engaging trough recessedly formed close to a bottom surface thereof. The recessed engaging trough engages with a hook end of the restricting piece, so the restricting piece can tightly clamp a fixed edge of the elastic air bag. Since the restricting pieces with better strength are disposed in restricting slots of the frame to tightly confine the elastic air bag and the base to locate between the hook end and the pressing end of the restricting piece, so when the elastic air bag is heavily pressed, it would not escape from the restricting slot of the frame to increase the structural strength and durability.

Abstract: A securing device for connecting a reflector to an adjustment unit includes a connector connected to the reflector and a holding member is connected to the connector. The holding member includes a space and a slot defined axially through a wall of the holding member. Two notches are defined in two ends of the slot respectively. A securing member includes a frame which includes two upright portions and two transverse portions connected between the two upright portions. The two upright portions are engaged with the notches and one of the two transverse portions has a gap which is expanded when the neck of the adjustment rod of the adjustment unit passes therethrough. The sphere on the adjustment rod is located in the space and the securing member clamps the two ends of the slot to prevent the sphere from disengaged form the space.

Abstract: Coupling pins for connecting weapon components are described. An example fastener to couple weapon components includes an elongated body defining a first aperture. The first aperture being defined along a longitudinal axis of the elongated body. Tension member and a biasing element being positioned within the first aperture. The elongated body defining a second aperture. The second aperture being defined through a portion of the elongated body to enable a tension element, positioned at least partially within the second aperture, to be urged from the elongated by via an interaction with the tension member. The fastener is insertable into aligned apertures of respective first and second weapon components. The tension element being urged from the elongated body to interact with the second weapon component to urge the second weapon component into further engagement with the first weapon component.

Abstract: A coupling/uncoupling device is disclosed for joining and disjoining first and second segments of a transmission and/or connection means. An end fitting of the device is arranged on the first segment. The end fitting creates a snap connection with a receiver part arranged on the second segment. The device may be adapted for use in vehicles, such as for a vehicle seat, a tailgate, an engine cover, a storage compartment, a battery pole connection, or for securing transported or loaded items.

Abstract: System for securing two tubular components (20, 22) one in the other, carrying a roller bearing (14) for holding the latter in position. Said system (15) includes a forcing nut (25) mounted inside the coaxial components and axially abutting against the first component after screwing-in of the second component, and a locking pin (26), for preventing unscrewing of the nut, arranged between the latter and the first component. Advantageously, the system further comprises a cylindrical sleeve (51) arranged between the pin (26) and the first component (20), being secured axially relative to the latter, and including an axial stop (52) against which the pin is applied, and first and second means (57, 58, 60, 61, 62) for linking the pin and the first component in rotation, respectively, with the sleeve.

Abstract: A wave spring holding structure includes a wave spring that includes crest portions and recessed portions that are alternately formed in a circumferential direction thereof, and a first gap; a circular member provided to be rotatable around an axis; and an arc-shaped snap ring that includes a second gap, and that restricts movement of the circular member in a direction of the axis. The wave spring and the snap ring share the axis with the circular member. The wave spring and the snap ring are rotatable with respect to each other. The wave spring is disposed and held between the circular member and the snap ring so that the crest portions protrude toward the circular member, and the recessed portions protrude toward the snap ring. The first gap is formed in one of the crest portions.

Abstract: Disclosed herein are connectors for panels. In one embodiment a panel connector comprises, a connector comprising a rib-hinging geometry, wherein the rib-hinging geometry comprises living hinges, and wherein the rib-hinging geometry is capable of expanding in area. In another embodiment, a panel assembly is disclosed. The panel assembly comprises, a connector comprising a rib-hinging geometry, wherein the rib-hinging geometry comprises living hinges, a socket comprising an internal geometry, wherein the connector can be assembled to the internal geometry, and wherein the rib-hinging geometry is capable of expanding in area.

Abstract: A pin joint assembly for pivotally connecting a plurality of components, the assembly including a joint pin with a channel at one end disposed transverse to a longitudinal axis of the pin and a first retainer disposed in the slot that extends beyond a circumference of the pin to restrict axial movement in a first direction, while a second retainer is positioned over the first retainer to restrict axial movement in the opposite axial direction, a retainer base having a slot being configured to receive one end of the first retainer to restrict rotational movement of the first retainer and attached joint pin. The joint pin and pin joint assembly may be provided as part of a suspension assembly for machine axles, the pin joint assemblies providing pivotal connections between an axle assembly, linkage and frame members.

Abstract: A construction element in the form of an openable clamping element (1) being applicable to a primary object and including at least one clamping element (1) surrounding the primary object and a locking element, characterized in that the clamping element (1) contains at least one partition slot being a parting line of the clamping element, and a locking bar (8) being introducible into the slot, whereby the slot is oriented in parallel to the through going axis of the clamping element.

Abstract: A retaining ring is characterized by a variable effective inner diameter and a variable effective outer diameter to axially retain a first member with respect to a second member.

Abstract: In the process of connecting two housings (10, 30), a lock arm (36) is resiliently deformed in an unlocking direction crossing a connecting direction of the two housings (10, 30) by sliding in contact with a guiding surface (17) of a lock portion (16). The guiding surface (17) includes a first guiding surface (17A) arranged in a front area in the connecting direction to the second housing (30) and a second guiding surface (17B) arranged in an area behind the first guiding surface (17A) in the connecting direction to the second housing (30) and having a steep area (22) whose angle of inclination with respect to the connecting direction of the two housings (10, 30) is larger than that of the first guiding surface (17A).

Abstract: A system to retain a sleeve within a housing includes a sleeve, a spring loaded retaining pin which can be moved to be fully within the sleeve, a locking pin to hold the retaining pin within the sleeve when the sleeve is being set into or withdrawn from the housing, and an annular recess in the housing to receive the retaining pin when the sleeve is set in the housing, the locking pin is removed and the retaining pin is pushed outward by the spring. The sleeve is retained within the housing when the spring pushes the retaining pin outward so that the retaining pin engages the annular recess in the housing.

Abstract: An example coupling stack includes a first rotating member and a second rotating member. A plurality of aligned slots is defined in the first rotating member and the second rotating member. A tab lock is provided having an annular body with an axial front side, an axial back side, and a radial inner periphery. Tabs are formed on the axial back side and inserted into the plurality of aligned slots. The annular body of the tab lock also includes a plurality of openings extending into the radial inner periphery. A plurality of flanges is provided on the axial back side of the annular body adjacent to the plurality of openings.

Abstract: A sheet transport apparatus includes a transport roller for transporting a sheet to the processing section, a driving motor for driving the transport roller, and a driving transmission mechanism. The driving transmission mechanism includes a rotary shaft, a transmission rotary member having a circular fit hole, a holder member with a press-fit hole having a curved part and a flat part, and a coupling mechanism for coupling the holder member and the transmission rotary member. The rotary shaft includes a fitting part having a circular cross section at one end side to be fitted into the circular fit hole, and a press-fit part having a curved part and a flat part press-fitted with the press-fit hole. The coupling mechanism includes a convex portion formed on a side of the transmission rotary member, and a concave portion formed on a side of the holder member press-fitted with the convex portion.

Abstract: Disclosed herein are connectors for panels. In one embodiment a panel connector comprises, a connector comprising a rib-hinging geometry, wherein the rib-hinging geometry comprises living hinges, and wherein the rib-hinging geometry is capable of expanding in area. In another embodiment, a panel assembly is disclosed. The panel assembly comprises, a connector comprising a rib-hinging geometry, wherein the rib-hinging geometry comprises living hinges, a socket comprising an internal geometry, wherein the connector can be assembled to the internal geometry, and wherein the rib-hinging geometry is capable of expanding in area.

Abstract: A latching system has a frame having a U-shaped recess, and a latching element for closing the recess. The latching element is U-shaped in essence, one leg of which forming a latching pawl and the other leg forming a control pawl, and a connection member of which, pivotable around capstan, being connected to the frame. The latching element is pivotable between a release position, in which the latching pawl is situated outside the recess and the control pawl extends into the recess, and a latching position in which the latching pawl closes the recess in the frame and the control pawl is situated outside the recess. The latching system further includes a blocking mechanism which includes a movable blocking pin. The latching element is provided with notches with which in the latching position or release position respectively the blocking pin engages.

Abstract: A valve retainer is provided for securably retaining a discharge valve assembly within a recess formed in a scroll. The valve retainer can be installed between the recess of the non-orbital scroll and the discharge valve assembly to retain the discharge valve assembly at the recess. The valve retainer can include a ring-like body having inwardly and/or outwardly extending tangs for cooperating with structure formed on the respective valve and the recess of the non-orbital scroll.

Abstract: A fastening device for fastening an element in a keyhole-shaped cutout in a wall includes a retaining element which in the fastened state of the fastening device is configured to rest against a front side of the wall, and to at least partially cover an edge of a narrower opening of the keyhole-shaped cutout. The fastening device also has a locking element which in the fastened state of the fastening device is configured to engage through a wider opening of the keyhole-shaped cutout, and to retain the fastening device from a back side of the wall.

Abstract: A connecting assembly comprises a shaft journal with an outer journal groove; a constant velocity universal joint with an inner joint part which, for the purpose of transmitting torque, is connected to the shaft journal in a rotationally fixed way and which comprises a sleeve projection, wherein, in an outer circumferential face of the sleeve projection, there is provided an engagement recess; a securing sleeve for axially fixing the inner joint part relative to the shaft journal; wherein the securing sleeve comprises inner holding portions which engage the journal groove, as well as outer holding portions which engage the at least one engagement recess.

Abstract: A spacing assembly kit, for use with an implement assembly of a machine, includes a spacing element having a bore and a recess coaxial with the bore, the spacing element being positionable on an implement coupling pin to reduce an implement coupling width, and a spring clamp positionable within the recess and configured to inhibit movement of the spacing element along an implement coupling pin. An implement assembly includes an implement having a body and spaced apart pin supports, with a pin positionable within the pin supports and having an implement coupling width defined by an exposed portion of the pin. Spacing elements are positionable on the pin between the pin supports and configured to reduce the coupling width, spring clamps further being provided which are configured to inhibit movement of the spacing elements when the clamps are engaged about the pin.

Abstract: A form for receiving a filler material to create an island is provided. The form is made essentially entirely out of galvannealed steel that is easily paintable. The form has a substantially continuous wall having an outer surface and an inner surface. The wall is made out of a plurality of galvannealed steel wall sections. The wall has a first side and a second side opposite the first side. The inner surface forms an enclosed chamber for receiving the filler material. A first support made out of galvannealed steel is attached to the inner surface of the first side of the wall and a second support made out of galvannealed steel is attached to the inner surface of the second side of the wall. A brace made out of galvannealed steel is disposed between the supports, wherein the brace removably engages the supports.

Abstract: A convex forward surface of a forward-biased probe head of a first portion of a docking system engages a central concave conical surface of a second portion of the docking system. A first linear actuator moves a flexible docking cable assembly relative to a support structure through bores therein and through the probe head. An aftward retraction of the docking cable assembly causes a linearly-actuated cam element thereof to rotate a rotary cam follower pivoted from the support structure, which engages an aft edge portion of the probe head, forcing the probe head forward. A plurality of distal coupling elements operatively coupled to the support structure around a central axis thereof engage with and become releasably captured by a corresponding socket and associated capture mechanism of a mating second portion of the docking system, and rigidized when the probe head is forced against the central concave conical surface.

Abstract: A connecting system for connecting first and second mesh sheets each defining a plurality of longitudinal members at least one pin housing, a first pin member, and a second pin member. A first loop portion is formed on at least one of the plurality of longitudinal members of the first mesh sheet. A second loop portion is formed on at least one of the plurality of longitudinal members of the second mesh sheet. At least one pin housing defines a loop passageway, and the first and second loop portions extend in opposite directions through the loop passageway. The first pin member is arranged between the first loop portion and the at least one pin housing. The second pin member is arranged between the second loop portion and the at least one pin housing. Loads that displace the first and second mesh sheets away from each other are transferred between the mesh sheets by the pin housing and the first and second pin members.

Abstract: A method of joining together a first and second workpieces. The method comprises; drilling a first hole at least partially through the first workpiece with a drill bit oriented in a first direction; drilling a second hole at least partially through the first workpiece with a drill bit oriented in a second direction which is not parallel with the first direction, the drill bit passing through the first workpiece into a side of the first hole; inserting a fastener through the second workpiece and into the first hole; inserting an anchor into the first hole via the second hole; and securing the fastener within the first hole with the anchor. The invention also relates to a drill guide for use in such a method.

Abstract: The component (X) is connected to a seat housing (1) and the retaining bolt with the ceiling (or wall) Y. The seat housing (1) has an opening for receiving a plug-in element (4). A part of the retaining bolt with a recess projects into the seat housing. A connecting element is provided in the plug-in element (4) (or in the seat housing), which, when the plug-in element is inserted into the seat housing, engages the recess of the retaining bolt. In the inserted state, the plug-in element (4) is held in position in the seat housing (1) by a detachable lock-in connection. When the lock-in connection is released, an opening spring pushes the plug-in element into the open position. An insert arrangement which encircles the retaining bolt (and if required, a vibration-damping ring) is provided for fixing the retaining bolt in the ceiling.

Abstract: A connection device for connecting two structural components is comprising a retaining member in a first structural component and a fixing member for insertion in a second structural component for connecting engagement with the retaining member thereby holding the two structural components together. The fixing member comprises a plug member having a first end and a second end, the the first end comprising an undercut head for insertion in and retaining engagement with the retaining member. The plug member is comprising a member for engagement with the second structural component.

Abstract: A removable device for attaching two mechanical parts includes a pin removably locking a first part with respect to a second part, a retainer member on the pin and a resiliently loaded tension member which collaborate to prevent the pin from coming out of its locked position; the removable device further includes at least two inclined surfaces, the general shape of which is that of a projection oriented in the axial direction of the pin, such that when the pin rotates, the retainer member runs along the inclined surfaces and the pin moves between the locked position and unlocked position against a force exerted on the pin along a longitudinal axial direction of the pin exerted by the tension member.

Abstract: A bonnet assembly for a blowout preventer uses a seal carrier that is removable so as to allow for efficient and easy seal replacement. The seal carrier has: a recess adapted to at least partially embed a seal for sealing the bonnet assembly to a body of the blowout preventer; and a first connecting rod coupled to and extending from an inner surface of the seal carrier, where the first connecting rod has a fastening structure proximal to a distal end of the first connecting rod, where the fastening structure is adapted to engage with a first fastening device, and where the seal carrier is removable from the bonnet assembly when the first fastening device is disengaged from the fastening structure.

Abstract: A connective system for connecting a first body to a second body having an aperture, is provided. The system includes a pin connected with the first body. The pin has a detent surface. A retainer ring having a snap fit engagement with the pin detent surface is provided. The retainer ring also has a locking arm for entry into the aperture of the second body with snap fit engagement with a surface of the second body thereby retaining the second body with said first body.

Abstract: A device for connecting a wear part to a support thereof on materials handling equipment for public works machines, comprises a key placed in an axial alignment with regard to an elastically deformable sleeve placed in part of an adapter. The key has a key foot and a key head on either side and opposite ends of a body. The key head is arranged with a part forming an off-centered seat. The key foot comprises an anchoring element for temporarily penetrating into the elastically deformable sleeve. Rotation of the key causes its misalignment with regard to its initial axis and the tight securing of the key, either in the sleeve by anchoring, or against metal parts of the tooth and of the adapter on differentiated support zones.

Abstract: A cable coupler includes a body having a first end, a second end, and first and second passageways sized and shaped to receive a cable, with each passageway including a tapered portion. A wedge assembly is disposed in each tapered portion to secure a cable to the body. A clip assembly is attached to the body adjacent the tapered portion of each of the passageways and is shiftable between a closed position in which the clip assembly is positioned to prevent an adjacent one of the wedge assemblies from exiting the corresponding passageway and an open position in which the adjacent wedge assembly is insertable into the tapered portion of the corresponding passageway.

Abstract: The invention relates to a plug for releasable engagement with the centre-pin of a roller blind control unit wherein engagement of the plug with the pin ensures that a tip of the center-pin engages an external surface of the control unit. In addition, a releasably inter-engaging combination of this plug and center-pin wherein insertion of the center-pin through a roller blind control unit and engagement with the plug, ensures that a tip of the center-pin engages an external surface of the control unit is described. The invention also relates to a control unit for use in a window blind head rail assembly comprising: a sprocket wheel, a sprocket support and wrap spring, a splined bush for engagement with a roller blind tube, a center-pin, and a plug for releasable engagement with the center-pin.

Abstract: An axially tensioned pipe joint for joining two pipes is disclosed. The pipe joint comprises a first PVC pipe having an outer surface. The pipe joint also comprises a second PVC pipe having a bell end which fits onto the spigot end. The bell end has a plurality of angularly-spaced-apart holes extending radially through the bell end. A set of radial fasteners can be inserted into the holes so as to engage the outer surface of the spigot end to prevent relative axial movement of the first pipe with respect to the second pipe. The radial fasteners have a surface containing a hard material which is harder than the material of the second pipe and roughen the holes during insertion thereby creating a friction fit resisting removal of the radial fasteners. The pipe joint can be used for horizontal direction drilling.