Abstract: A quarter-turn fastening device for fastening a part to a support comprising comprises: a head carrying the part and intended to rest on a first face of the support; and a holding foot connected to the head and extending along a main axis, the holding foot configured to penetrate axially into an opening of the support, thereby placing the fastening device in an insertion position. The holding foot comprises at least one flexible retaining tab for resting on a second face of the support when the fastening device is moved angularly from the insertion position to a locking position. The flexible tab carries a lug to fill the space between the holding foot and an edge of the opening and thus refocus the fastening device in the opening when the fastening device is moved angularly from the insertion position to the locking position.

Abstract: A golf car canopy extension panel that is connectable to a canopy main panel, wherein the extension panel comprises a first extension longitudinal water channel that is fluidly connectable to a first main longitudinal water channel main panel, and a second extension longitudinal water channel that is fluidly connectable to a second main longitudinal water channel of the main panel, wherein the first and second extension longitudinal water channels each comprise a termination end structured and operable to direct water to exit the respective extension longitudinal water channel at an end of a sidewall of the respective extension longitudinal water channel.

Abstract: A lock mechanism for a faceplane infrastructure coupled externally from a faceplate of a modular device includes a locking bar, a locking bar engagement element, and a securing device. When the lock mechanism is assembled and in a locked state, the locking bar is housed within the modular device. Further, when the lock mechanism is assembled and in the locked state, the locking bar engagement element is fixedly coupled to a first portion of the faceplane infrastructure and removably engaged with the locking bar through an aperture in the faceplate of the modular device. Moreover, when the lock mechanism is assembled and in the locked state, the securing device locks the first portion of the faceplane infrastructure to the faceplate of the modular device.

Abstract: A shelf assembly, in particular for a domestic cooling device, includes a receiving plate having a front plate edge, a rear plate edge and two lateral plate edges, and a holding strut on at least one of the lateral plate edges for supporting the receiving plate. The holding strut has in the region of a rear strut end at least one hook structure for fitting the holding strut into a mounting opening of a carrying structure. At a distance beneath the hook structure, the holding strut forms a first support structure for support on a front side, facing the strut, of the carrying structure. The holding strut, in the region of the rear strut end, at a distance above the first support structure, provides a resiliently deflectable second support structure for support on the front side, facing the strut, of the carrying structure.

Abstract: A hand crank cam lock for connecting medium to large sized display walls or boards including a hand crank disposed in a cam lock. The hand crank cam lock is configured to join two separate extrusions or frames together in a toolless manner. The hand crank cam lock locks these frames when the hand crank is turned clockwise, a plurality of hooks slide back along channels inside an outer body to grab the inner walls of a frame. This will in turn lock the hooks into place against the inner walls. The hand crank will only require half a turn to travel the required distance to lock the hooks into place and this half turn may be performed via a tool or by hand.

Abstract: Segments are linked in the circumferential direction to assemble a pipe unit. A link bolt is used to link the segments of the pipe unit in the longitudinal direction to assemble a rehabilitation pipe inside an existing pipe. An elastically deformable hollow cylindrical member having a tongue is attached to the link bolt between the inner plates. The outer diameter of the cylindrical member is larger than the insertion hole of the inner plate through which the link bolt can pass. This allows the link bolt to be prevented from falling out of the segment when the link bolt moves in the longitudinal direction due to gravity. When a force is applied to the tongue from below, the cylindrical member is elastically deformed and can be removed from the link bolt.

Abstract: A railing strut includes an end region to be connected to a wall element of the drawer. The railing strut, on the end region, includes a locking device having a locking element to be engaged with the wall element for locking the railing strut. The railing strut further includes a movably mounted actuating element, and the locking element can be moved by applying a force to the actuating element into a release position in which the locking between the railing strut and the wall element can be released when the railing strut is in a locked condition with the wall element. The actuating element, when the railing strut is locked to the wall element, is accessible for manual actuation and can be directly actuated, so that the locking between the railing strut and the wall element can be released by manual actuation of the actuating element.

Abstract: An apparatus comprising a clamp with a mounting body having downwardly extending legs with at least one leg configured with an arcuate surface and a slot formed in a bottom surface of said mounting body by the downwardly extending legs for receiving a raised portion of a surface and a top portion for securing the device thereon. The clamp further includes one or more pins being received in one or more push-pin holes formed in the arcuate surface of the mounting body at a predetermined angle relative to said slot, whereby the predetermined angle can secure the clamp to varying designs of the raised portion, and a fastener adapted to be received in a fastener hole formed adjacent the one or more push-pin holes in the arcuate surface to force the one or more pins against the raised portion disposed in said slot and secure the clamp thereto.

Abstract: A respiratory mask assembly for use with a patient, and that is suited for use with children ranging in age from about 2-7 years, includes a flexible patient interface structure arranged to interface with and deliver air to the patient's nose, the patient interface structure including cylindrical protrusions extending from respective opposite sides of the patient interface structure adjacent the patient's nares; a frame configured to support the patient interface structure, the frame including a pair of cylinders, each cylinder configured to receive a respective cylindrical protrusion of the patient interface structure; headgear arranged for releasable attachment to the frame; an air delivery tube connected to either one of the cylindrical protrusions; and a plug connected to the other one of the cylindrical protrusions.

Abstract: Examples of the present disclosure are related to systems and methods for a funnel and a removable cartridge holder that are used with a reusable beverage filter or beverage brewing pod.

Abstract: A stud layout locker and associated method having a longitudinal beam. A tab end at one end of the longitudinal beam defines an upstanding tab and a pair of opposing slots sized to receivingly engage a stud web. A slot end at the opposing end of the longitudinal beam has a flange defining a portion of a slot. The tab and slot are sized so that the tab of a first stud layout locker is insertable into the slot of a second stud layout locker and so that the tab is substantially parallel and adjacent the flange.

Abstract: A buckling restrained brace includes a core rod, a buckling restraining tube concentrically surrounding at least a portion of a length of the core rod and configured to provide lateral support to the core rod to hinder buckling of the core rod upon compressive loading of the core rod, and an exterior support tube disposed concentrically surrounding at least a portion of a length of the buckling restraining tube. A plurality of spacers may be disposed between the buckling restraining tube and the exterior support tube at intervals along a length of the buckling restraining tube. The plurality of spacers may locate and support the buckling restraining tube within the exterior support tube.

Abstract: An interconnect assembly for a switching assembly in which the switching assembly includes a bus bar and an electromagnetic switching device having a contactor bus. The interconnect assembly is structured to mechanically couple and electrically connect the contactor bus to the bus bar. The interconnect assembly includes a socket member structured to engage the bus bar, a post assembly that includes a post member structured to extend through the contactor bus, in which at least a portion of the post member extends into the socket member, and a locking member disposed on the post member. The locking member is structured to extend through and removably engage the socket member in order to mechanically couple and electrically connect the contactor bus to the bus bar.

Abstract: A building connection between a plurality of vertical wall studs made with a plurality of bridging members to brace the wall studs. The bridging members are formed with mounting sections that are received in openings of the wall studs and the mounting sections are bracketed by connecting sections that are used to join the bridging members to each other. The bridging members interface with the web of the wall studs to brace them.

Abstract: A slide plate (20) for a cam-type closure of a clamping device (1) for releasably connecting two profiled pieces (2). The slide plate has a coupling region (11, 28) for coupling with locking elements (4, 5, 6) of the clamping device (1). The slide plate (20) has an inner opening (23) for receiving an eccentric roll (22) of the clamping device (1), which can be used for the axial displacement (30, 130) of the slide plate (20). A spring region (27) is provided between the inner opening (23) for receiving an eccentric roll (22) and the coupling region (11, 28).

Abstract: A structural frame assembly is provided that includes mechanically interlocking components. The frame assembly has rails that interconnect with each other at joints that include brackets that engage the rails and nuts that are held in cavities of the rails that are connected to slots that extend through outer surfaces of the rails. Bolts may extend angularly through bores of the bracket and the slots of the rails to operatively engage a nut being held in the cavity. Tightening the bolts may draw the nut angularly through the cavity in a manner that automatically self-aligns the brackets and rails to establish precise joints.

Abstract: A connection system includes a sheet-metal part which is connected to a base plate. A connecting slot is formed in the base plate, and the sheet-metal part includes a connecting tab. The connecting tab includes a retaining region and a first stop. The connecting slot has a first end which faces towards and which is opposite the retaining region. The retaining region is inserted into the connecting slot in an assembly position. The retaining region includes a surface which engages an underside of the base plate in a connected position. The first stop is exposed in the assembly position. During the transition from the assembly position into the connected position, the first stop is inserted into the connecting slot and is brought into engagement with the first end of the connecting slot.

Abstract: A method of fabricating a self-locking joint in a panel structure. The method provides a panel structure having at least two face sheets and a core portion sandwiched therebetween. The method further fabricates in a first portion of the panel structure at least one mortice opening having self-locking end portions. The method further fabricates on a second portion of the panel structure at least one tenon extension having flexible self-locking members. The method further interlocks the flexible self-locking members of the at least one tenon extension with the self-locking end portions of the at least one mortice opening to form a self-locking joint in the panel structure.

Abstract: The present invention discloses a display backplane and an LCD device. The display backplane comprises multiple supporting brackets and a connecting slot, wherein, the connecting slot comprises a sliding slot and a protruding platform, and the protruding platform is sliding held in the sliding slot, and at least two of the brackets can rotate relatively about a first rotation axis perpendicular to the plane of the display backplane. After rotation, the display backplane formed by the brackets is smaller in volume such that it can reduce the volume occupied by the packing and shipping during transportation process of the display backplane in order to reduce the packing and shipping cost during transportation process of the display backplane.

Abstract: A fastening arrangement for a wall-supported and floor-supported element of an interior fitting on the side wall of a rail vehicle is provided. A C-section rail is arranged on the side wall for receiving sliding blocks to which the element is releasably screwed. The element is provided with a shaped part which at least partially encompasses the C-section rail and extends in the longitudinal direction of the C-section rail. The shaped part is supported on at least both of its ends on the outside of the C-section rail for absorbing vertical loads and moments, and, for absorbing the longitudinal and transverse forces acting on the shaped part, the shaped part is connected to at least one sliding block which is arranged between both ends of the shaped part in the C-section rail.

Abstract: An installation element of an installed packing for material and/or heat exchange between gases and liquids, having pegs and recesses for engaging with at least one further installation element. In order to make the engagement easier the recesses each are associated with ring gap segments.

Abstract: An assembly (1) between a side member (2) and a rear panel (3), for instance in a piece of furniture, a wardrobe or a kitchen element. The assembly consists of a flange part (3a) of the rear panel (3) inserted sidewards into a locking slot (6a) in the side member (2), the insertion of the flange part (3a) being effected via a longitudinal slot (8) at the access to the locking slot (6). The rear panel (3) is secured to the side member (2) by at least one part (10) of the side member (2) extending into at least one withdrawal slot (20) in the rear panel (3), or by at least a part (21) of the rear panel extending into at least one withdrawal slot (23) in the side member (2). Hereby an assembly is obtained which is not only light of weight, but which is also solid and robust and easy to set up.

Abstract: Aspects of the invention are directed to a fastening device. A housing comprises a substantially planar coupling plate defining an aperture. A first engagement member passes through the aperture and defines a first arcuate surface with a first outwardly extending foot at a proximal end and a first protruding rim at a distal end. A second member is largely a mirror image of the first engagement member. A slide is adapted to be translated between a first position and a second position. When the slide is in the first position, the slide occupies a space between the first and second engagement members so that they are fixedly spaced apart. When the slide is in the second position, the first engagement member and the second engagement member are free to limitedly pivot in the housing to a condition in which the distal ends of the two engagement members meet.

Abstract: Metal profile (230,280) as well as with the metal profile cooperating fastening device (800,830,860), wherein the two-dimensional cross-section of the metal profile, perpendicularly to the length of the profile, includes a screw pocket (233). The screw pocket includes a hole (234), arranged to accommodate a screw which is inserted perpendicularly to the cross-section, as well as an opening (235) out from the hole, which opening is narrower than the cross-sectional dimension of the hole perpendicularly to the main direction of extension (M) of the opening, and in that the screw pocket is arranged to accommodate, and therefore to engage with, the fastening device, which fastening device can be inserted into the screw pocket perpendicularly to the cross-section and thereafter be slid in the screw pocket along the metal profile.

Abstract: A combination cabinet includes a plurality of upright posts, a plurality of crossbars arranged between the upright posts, a plurality of connectors mounted between the upright posts and the crossbars to connect the upright posts and the crossbars, and a plurality of rotation knobs mounted between the crossbars and the connectors. Thus, the upright posts and the crossbars are combined together by interaction of the connectors and the rotation knobs. In addition, when the crossbars are unlocked from the upright posts, the crossbars are moved freely relative to the upright posts to adjust the position of the crossbars relative to the upright posts.

Abstract: An apparatus and method of employing modified twist-to-engage bolts that attach a photovoltaic (PV) module to an extrusion rail or channel within a rail are disclosed. In addition to a modified twist-to-engage bolt (e.g., “t-bolt”), a complementary bracket portion having alignment tabs locks in place and clamps the modules to the rail. The anti-rotation locking system prevents twist-to-engage bolts from disengaging without the removal of the complementary bracket.

Abstract: A securing member includes a flat base portion, a flat top board portion which is supported by a pair of top board supporting portions erected on the base portion, a long hole which penetrates through the top board portion and of which both ends are closed, a bolt having a head which does not pass through the long hole, and of which shaft is inserted through the long hole in a state where the head is located lower than the top board portion and is to be inserted through a supporting hole provided on a supporting member of a solar battery module, a head insertion hole through which the head of the bolt passes, penetrates through the top board portion, and communicates with the long hole, securing holes which are located on a line obtained by projecting a center line of the long hole, and penetrate through the base portion.

Abstract: A joint with a protrusion rod has a male buckle and a female buckle engaged with each other. The male buckled has a hollow insertion stub with multiple expansion slots and has a receiving hole to movably receive a protrusion rod. A distal end of the protrusion rod is movably engaged with the insertion stub. The protrusion rod has a locking plate and multiple fins correspondingly engaged with the expansion slots when the protrusion rod is wedged into the insertion stub. By having the above structure, difficulty of disengagement of the protrusion rod from the insertion stub is significantly increased to prevent the disengagement of the male buckle and the female buckle. Thus, the joint has increased combination strength and is excellent in utility.

Abstract: A display unit for displaying materials, such as flooring materials, is provided. The display unit includes a frame having a plurality of spaced apart legs arranged in a common vertical plane, each of the legs having a plurality of vertically spaced slots. The frame also includes a plurality of walls, each having two opposite end portions attached to two adjacent legs and arranged parallel to the common vertical plane. A plurality of horizontal rails having knife brackets affixed to opposite ends thereof is included. The knife brackets each include a plurality of engagement tabs that engage with the slots, and a movable locking device. A plurality of display pages are mounted for pivoting movement between an upper rail and a lower rail of the plurality of horizontal rails.

Abstract: An alignment guide for maintaining perpendicularity between an elongated anchor rail secured to an overhead support and a sign supporting elongated adjustment rail, comprising: a guide housing having an anchor rail receiving channel arranged across an upper surface thereof; an adjustment rail receiving channel arranged across a lower side of the guide housing, wherein the anchor rail receiving channel and the adjustment rail receiving channel are perpendicular to one another.

Abstract: A retainer structure having excellent workability of attaching to and removing from a panel is obtained. In an approximately cylindrical retainer main body (22), a cap holding portion (26) for attaching a cap (18) which is an attached member, and a panel clamping piece (32) contacting a body panel (14) from a side opposite to a seal packing (20) so as to clamp the body panel (14) between the panel clamping piece and a flange portion (24), are formed. The cap holding portion (26) and the panel clamping piece (32) are formed at positions different in a circumferential direction of the retainer main body (22).

Abstract: A clamp for section tubes having a shell with a front lateral, a fork contained in the shell and having a pair of arms and a fork neck, an end block fixed to the arms and an end slope, a slide block between the arms and having a rear slope, a pair of rigid tie bars each having a rear end pivotally linked to the fork neck, a hooked head sticking out from the front lateral and a middle recess facing each other, a pillar fixed to the shell and sandwiched in the middle recesses, a control screw rotatably contained in the shell and having a middle thread portion engaging with the slide block, an end spring between the shell and the end block, and a first and a second side springs respectively between the shell and the tie bars.

Abstract: A connecting system configured to secure at least one cavity including curved and retaining walls and positioned on a surface portion located on an edge of a substrate made of a fragile material of glass type and a support member. The connecting system includes a shoe including at least one appendage projecting from at least one of faces of the shoe, the appendage having a profile that complements the profile made on the surface portion situated on the edge of the substrate.

Abstract: A fastener (10) is adapted to releasably fix a first element (12) and a second element (14). The fastener (10) includes a channel (22) having a plurality of spaced lockers (28). The lockers (28) are movable into the channel (22). The fastener (10) also has a locking tongue (30), having a plurality of spaced blockers (32). The tongue (30) is movable within the channel (22) between a locked position in which the blockers (32) prevent movement of the lockers (28) into the channel (22) and an unlocked position in which the lockers (28) are not prevented from moving into the channel (22).

Abstract: A fastening system for fixing and/or aligning at least one sensor element, in particular an active infrared sensor or the accessory parts thereof, such as printed circuit boards, controls, energy sources etc., in a rail element with at least one fastening element, characterized in that the fastening element can be plugged from a front side into the rail element at any desired position. The object is further achieved by providing a fastening system for fixing and/or aligning at least one sensor element, in particular an active infrared sensor or the accessory parts thereof, such as printed circuit boards, controls, energy sources etc., in a rail element with at least one fastening element, characterized in that at least one sensor element and/or the accessory part thereof can be inserted into at least one fastening element in a fashion capable of being re-released and of being aligned with regard to its inclination and the like.

Abstract: A structural building system includes a plurality of pultruded fiberglass reinforced structure components configured to be used as a structural frame member of a building and a plurality of connectors. Each connector is configured to be mounted to one end of a first pultruded structural component and includes a mounting section that is couplable to a second pultruded structural component so as to connect the first and second structural components at right angles to each other.

Abstract: A mounting apparatus for a top mount mast antenna includes a secondary mounting bracket positioned below the fender panel to stabilize the antenna attachment screws extending through the antenna base into the fender panel of the automotive vehicle on which the antenna is mounted. The secondary mounting bracket is formed with a generally circular reinforcement collar that projects upwardly through the opening in the fender panel. The reinforcement collar has opposing retention tabs that pass through recesses formed in the opening. A rotation of the secondary mounting bracket within the opening rotates the retention tabs to a position overlying the fender panel, and moves deformable bosses into alignment with the screw holes in the fender panel. The rotation of the secondary mounting bracket is halted by the engagement of a closed side of the bosses with a flange of material created by the piercing of the screw holes.

Abstract: A family of beam cross-connections, including column/beam and beam/beam connections, between beams and columns in a building frame. Each connection within a cross-connection features (a) a pair of parallel-spaced, upright, planar plate components operatively associated with either a side of a column or a side of a beam, (b) an elongate, generally horizontal cross-connection beam including a generally upright, planar central web with an end which, with respect to a pair of such plate components, extends into the space that exists between those components, and (c) a structural relationship involving the plate components in a pair which accommodates (1) vertical-motion placement of a web end between the components, with (2) the automatic establishment thereby of correct relative, spatial, three-dimensional relationships and dispositions of the specific, associated column and/or beam elements so connected.

Abstract: A stemware holder for holding a stem of a stemware in a wire-frame dish rack. The dish rack comprises a bottom wall formed by wires with multiple tines extending from the bottom wall. The stemware holder comprises a stem holder configured to hold the stem, a rack mount configured to couple the stem holder to the dish rack, and a radial lock configured to releasably hold the stem holder at multiple radial positions relative to an axis generally perpendicular to the bottom wall when the stemware holder is mounted to the rack.

Abstract: A molded panel is provided, which includes a body and a plurality of supporting members. The body includes a generally planar top surface and a bottom surface. The supporting members extend from the bottom surface of the body to define a support structure. The support structure includes a top surface adjacent to the bottom surface of the body, a generally planar bottom surface and at least one edge extending therebetween. The support structure also includes at least one channel extending along a central x-axis of the support structure, and at least one additional channel intersecting the at least one central channel and extending along a y-axis of the support. The y-axis is generally perpendicular to the x-axis. A connection system for the molded panel, systems including the molded panel, and methods related to the molded panel are also described.

Abstract: A system for displaying photographs is disclosed. The system includes one or more horizontal members or bars that are secured to a wall, such as a wall of a house. The horizontal members are preferably immovably secured, as by wall anchors or nails. The horizontal members preferably include a profile, such as a shaped, hollow cross-sectional area, that is configured to mount two or more vertical members. Two or more vertical members or bars are then secured to the horizontal members. The vertical members may be mounted using the profiles, channels, or grooves of the horizontal members. They may be mounted using a connection stud, a tab or a clamp, such as a spring clamp. The vertical members preferably also include continuous, vertical grooves on their sides, for placing photographs into the grooves for display.

Abstract: A fastener (10) is adapted to releasably fix a first element (12) and a second element (14). The fastener (10) includes a channel (22) having a plurality of spaced lockers (28). The lockers (28) are movable into the channel (22). The fastener (10) also has a locking tongue (30), having a plurality of spaced blockers (32). The tongue (30) is movable within the channel (22) between a locked position in which the blockers (32) prevent movement of the lockers (28) into the channel (22) and an unlocked position in which the lockers (28) are not prevented from moving into the channel (22).

Abstract: A mounting apparatus for a top mount mast antenna includes a secondary part to stabilize the antenna attachment screws extending through the antenna base into the fender panel of the automotive vehicle on which the antenna is mounted. The secondary part is preferably formed of nylon to serve as a retaining device for the attachment screws so that the screws do not loosen, which ultimately causes separation of the antenna from the fender panel and a corresponding deformation of the fender panel. The secondary nylon part allows a flexible installation that can be accomplished before painting of the fender panel. The secondary part fits into the opening in the fender panel to mount on the peripheral circumference of the opening and extend outwardly form the opening below the fender panel to be positioned for engagement with the attachment screws connecting the base member of the antenna to the fender panel.

Abstract: A system for connecting modular walls includes a position retention mechanism configured to releasably retain a plurality of wall modules together. In one implementation, the position retention mechanism includes opposing front and back surfaces or walls, and one or more channels formed therebetween. The position retention mechanism is further configured with a plurality of spring tabs positioned within the one or more channels, wherein the spring tabs are configured to lock into a plurality of opposing connector interfaces corresponding to the opposing wall modules, such that the positioning retaining mechanism secures adjacent, opposing wall modules together. The position retention mechanism can further be configured with different surfaces to connect or hold a variety of components of various shapes together.

Abstract: The invention relates to a mechanical locking arrangement of an axial disk (7, 14) which is connected to a housing (1) or to a shaft (15), wherein the housing (1) has a receiving opening (3) into which the axial disk (7) is inserted, or the shaft (15) is surrounded by a central receiving bore (16) of the axial disk (14).

Abstract: A fluid operated wash brush is provided. The wash brush includes a casing having a downwardly opening top cover. The casing includes a liquid inlet for connection to a fluid supply. The wash brush also includes a rotary wash brush and a mounting shaft supported by the casing for relative rotation on which the rotary wash brush is carried. A retention mechanism is carried on a distal end of the mounting shaft for releasable engagement and disengagement with the rotary wash brush.

Abstract: The present invention is a kind of joint structure in the aluminum window, and in particular is designed for the awning typed aluminum window. It is mainly to design an internally laid joint plate with a simple structure to joint the window frames together directly. It is different from the prior art that needs to add an additional externally laid and large sized joint plate to joint the adjacent window frames. It is not only achieve the purposes of the large scaled material saving and also have the outside appearance of the whole aluminum window become more concise and not too disordered.

Abstract: A portable floor system having a plurality of floor panels configured for connection along abutting edges to form an extended floor surface. Each panel has a planar portion including a top surface, a core, and a bottom surface. Extruded edge portions include tongues along two edges and complementary tongues along the other two edges. Each edge also includes a panel connecting assembly along each edge, having a lock device extending from an edge into the core. The lock device mounts directly against an anchor element. The anchor element extends through the bottom surface and having a connector receiving portion.

Abstract: In various exemplary embodiments, an antenna assembly is configured for installation to a vehicle body wall having a mounting hole. The antenna assembly generally includes an antenna base configured to be disposed along an external side of the vehicle body wall. An electrical connector is coupled to the antenna base such that, when the antenna base is disposed along the external side of the vehicle body wall, the electrical connector is accessible from inside the vehicle. Accordingly, an installer (from inside the vehicle) may thus plug a communication link into the electrical connector to thereby allow the communication link to communicate signals received by the antenna assembly to another device.

Abstract: A channel connector comprises a main portion having a connecting portion, a clamping element having at least two opposite ends, and a threaded element threadably connecting the main portion to the clamping element. Each of the two opposite ends are spaced to interfere with walls of an interior portion of a channel during rotation of the clamping element in the interior portion of the channel.