Abstract: Disclosed is a posture correction device. According to the present invention, the posture correction device includes: a base part; and a recognizing part having a frame whose one side is coupled to the base part in such a manner as to allow one or more of a height and an angle to be adjusted, wherein the recognizing part is recognized visually and tactilely according to a user's posture.

Abstract: A display support system includes a support rail extending in a first direction and at least one support bar carried by the support rail. The support bar is moveable relative to the support rail in at least the first and second directions. A mounting member is engaged with the support bar, with the mounting member being adapted to be coupled to a display. A method for mounting an array of displays on a wall, and a support cart for mounting a display, are also provided.

Abstract: A tilting seat for operators in a controlled environment, particularly for surgeons and the like, comprising a saddle, a chest support, a forehead support and a leg support connected to a base standing on the ground, such that the saddle, the chest support, the forehead support and the leg support are integrally movable with rotation about a horizontal-axis joint placed below the saddle, keeping the space over the joint free from movable elements while in use, guaranteeing the substantial lack of contamination in such space.

Abstract: The present invention relates to a system iron. The system iron according to the present invention includes a body including a steam generator for generating steam; an ironing plate, which is rotatably coupled to an upper portion of the body and which sprays the steam generated by the steam generator to an outside; an angle-limiting member for limiting rotation of the ironing plate; a button unit, which is operated in linkage with the angle-limiting unit so as to release a state in which the rotation of the ironing plate is limited by the angle-limiting unit; and an elastic member for maintaining the state in which the rotation of the ironing plate is limited by the angle-limiting unit.

Abstract: Sitting furniture (100) comprising a seat (110), a lower leg support (120) and a chest support (130).

Abstract: A multi-function controller mount is configured or adapted for use with a game controller and an electronic device. The mount includes a controller receiver for removably attaching to the game controller. The mount also includes an arm having a first end pivotably attached to the controller receiver at a first pivot axis. The mount also includes a device tray that is pivotably attached to a second end of the arm at a second pivot axis. The device tray is configured for holding the smartphone at an adjustable height and viewing angle. The height and the viewing angle are adjustable through movement or the arm at the first pivot axis and movement of the device tray at the second pivot axis. The mount also includes a lock feature attached to the arm for selectively preventing movement of the arm relative to the controller receiver.

Abstract: An aircraft seat includes infinitely adjustable, lateral tilt control within a specified range. The aircraft seat includes a stationary support, a tilting frame rotatably or translatably attached to the stationary base, and a tilt control mechanism to adjust the tilt within the defined range and positively lock the frame without back-driving. The tilt control mechanism may include a plurality of linkages connected to the stationary support and the tilting frame, and to each other via a threaded block; a threaded shaft adjusts the linkages and thereby adjust the tilt. Alternatively, the tilt control mechanism comprises a curved rack and a pinion. The threaded block and threaded shaft, or the rack and pinion define ACME threads to prevent back-driving.

Abstract: Embodiments systems and methods for a platform that is configured to hold a medical device. In embodiments, a physician, nurse, medical practitioner, etc. may perform actions to change the positioning and orientation of the medical device while the medical device is secured to the platform. In further embodiments, the platform may include robotic components configured to change the positioning and orientation of the medical device.

Abstract: An adjustable mounting apparatus for mounting electronic devices and objects of various sizes on a flat surface comprises a first bracket and a second bracket. Each of the first and second brackets comprise a substantially horizontal plate, a substantially vertical plate, a back plate extending substantially vertically from a second transverse edge of the substantially horizontal plate, and a reusable adhesive layer disposed at a rear portion of the back plate. The substantially horizontal plate of each of the first and second brackets comprise a first retaining abutment extending substantially vertically from a first transverse edge of the substantially horizontal plate. The substantially vertical plate of each of the first and second brackets comprise a second retaining abutment extending substantially laterally from a first transverse edge of the substantially vertical plate.

Abstract: A support device for a container holding various items and a container including a support device. The support device includes a top section, a base section and a pair of foldable strut assemblies connected diagonally between the top section and the base section. The top section either forms a portion of the container or the container is mounted on the top section. Each strut assembly includes a pair of legs pivotably connected together and configured to automatically pivot to an extended position when the support device is held above a support surface and a release mechanism actuated, whereupon the base section drops with respect to the top section into engagement with the support surface. A biasing mechanism is provided to assist in pivoting the legs to the extended position and holding the legs in that position.

Abstract: An active suspension system comprises at least one biasing device configured to support a body from a structure, and at least one motor. A magnetorheological (MR) fluid clutch apparatus(es) is coupled to the at least one motor to receive torque from the motor, the MR fluid clutch apparatus controllable to transmit a variable amount of torque. A mechanism is between the at least one MR fluid clutch apparatus and the body to convert the torque received from the at least one MR fluid clutch apparatus into a force on the body. Sensor(s) provide information indicative of a state of the body or structure. A controller receives the information indicative of the state of the body or structure and for outputting a signal to control the at least one MR fluid clutch apparatus in exerting a desired force on the body to control movement of the body according to a desired movement behavior.

Abstract: Adjustable mattress assemblies and processes including an adjustable mattress foundation dimensioned to support a mattress configured to accommodate two supine users during use thereof includes a foundation frame including a first sub-foundation configured with at least one motorized actuator to effect inclination or declination of the mattress support surface and an abutting second sub-foundation free of a motorized actuator. The second foundation is mechanically coupled to the first foundation such that articulation of the first sub-foundation results in a similar articulation in the second foundation. The first and second foundations have similar length, height and width dimensions, which collectively approximates the size of the oversized mattress configured to accommodate two supine users, e.g., king size, queen size, California king size, or the like.

Abstract: A method for processing a fluid includes removably securing a retention member to a vessel that bounds a chamber; inserting a collapsible bag within the chamber of the vessel; securing the bag to the retention member so that the bag is supported within the chamber of the vessel; and dispensing a fluid into a compartment of the collapsible bag supported within the chamber of the vessel. The fluid can be mixed within bag while the bag is disposed within the vessel.

Abstract: A chair for supporting a body of a user in a substantially upright position relative to a vertical-axis; the chair includes a frame, a chest-support, a seat and at least one knee-support. In a preferred embodiment, the chair includes a tray configured to hold items/tools such as dentist equipment. The chair is useful for supporting the body of the user who needs to be seated for a prolonged period of time, to prevent un-comfort associated with the same.

Abstract: A method and apparatus for holding a panel. A rigid frame is secured on an aircraft on a rework area on the aircraft. A carrier is attached to the rigid frame. The panel is held on the carrier and the carrier moves the panel about a plurality of axes. The panel moves with the carrier such that the panel has a desired position relative to a rework opening in the rework area. The panel is attached to the aircraft while the panel is held in the desired position relative to the rework opening.

Abstract: Embodiments systems and methods for a platform that is configured to hold a medical device. In embodiments, a physician, nurse, medical practitioner, etc. may perform actions to change the positioning and orientation of the medical device while the medical device is secured to the platform. In further embodiments, the platform may include robotic components configured to change the positioning and orientation of the medical device.

Abstract: A desk platform structure for a fitness bike, including a desk platform, a desk platform fixing and sliding mechanism and a supporting rod is provided. The desk platform fixing and sliding mechanism includes a pair of fixing bars, a pair of sliding rails, and a fixing rack. The desk platform is installed on the fixing bars which are installed on the sliding rails. The sliding rails are fixed on guiding bars at two sides of the fixing rack which is connected to the supporting rod. A braking mechanism and a control mechanism for sliding and positioning of the fixing bar are disposed between the fixing bar and the fixing rack. Accordingly, the desk platform is more stable and reliable, and may slide and be positioned at any location. It is convenient to use the desk platform by further adjusting the inclination angle of the desk platform.

Abstract: The chair of the present disclosure balances safety, comfort, ergonomics, numerous desk geometries, a variety of floor surfaces, the physics of cantilevered elements, the height of floor obstacles, and a large range of body types/sizes. It can address the recommendations of ergonomic experts and adds the unique forward footrest/exercise bar for stretching, core workouts, and to increase the variety of ergonomic seating positions. The entire product can fold into a compact light weight package for easy transport and stowage.

Abstract: The present disclosure includes a motor bracket including a first body portion, a second body portion, and/or a third body portion that may be configured to receive a drive shaft. The second body portion may be connected to the first body portion via a plurality of connecting members. At least a portion of the third body portion may be disposed inside the second body portion. The first body portion may include a plurality of wings extending in an outward direction from the first body portion. At least one of the plurality of wings may include an accessory aperture. Each wing may include a plurality of endcap apertures. The first body portion may include a substantially L-shaped flange. The flange may include a hooked portion. The first body portion, the second body portion, and/or the third body portion may each have different radii.

Abstract: A headrest adjustment system includes a tension block having a threaded aperture extending entirely through the tension block. The tension block is configured to be coupled to a chair. The headrest adjustment system also includes a screw configured to be moved through the threaded aperture along an axis, and a clamp lever pivotally coupled to the tension block. The clamp lever has an inclined surface. The axis intersects the inclined surface at an oblique angle. The headrest adjustment system also includes a headrest tension bracket configured to be coupled to the chair. The headrest tension bracket has a first end and a second end and the second end includes a flange. The clamp lever is configured to contact and press against the flange upon movement of the screw.

Abstract: A body support device is usable to alleviate stress and strain from the weight of the upper torso on the lower back, spine, knees, and muscles. The body support device includes a chest plate, a body strap configured to couple the chest plate to a user, and a leg having a proximal end and a distal end. The proximal end is configured for releasably coupling with the chest plate and wherein the distal end is configured to extend outwardly from the chest plate and the body of the user.

Abstract: An upright active-sitting seat provides a connection of a seating leg to a base through an articulating joint that allows the user to move a seat front to back and side to side, allowing a more active sitting that encourages blood circulation. The chair includes a seat supported by a post that is connected to a mount via a ball joint rod by a transverse rod that is routed through the ball joint rod end. By way of a coil spring that engages with the mount and the post, the post is spring biased to a home position relative to the mount. When using the chair, a person may move the seat from the home position to a comfortable seating position. When the person stands from the chair after using it, the chair returns to its spring biased home position.

Abstract: The invention relates to a device for damping an upper suspension part in at least one spatial direction with respect to a lower suspension part movable relative thereto, wherein a spring apparatus which acts between the upper suspension part and the lower suspension part is provided for damping, wherein an actuating element is provided by way of which a force can be introduced into the device bidirectionally in the operating direction of the spring apparatus, wherein the actuating element is actuable via a control apparatus, wherein the actuating element comprises a drive, preferably in the form of a rotary field magnet, and a coupling rod, drivable by the drive and in the form of a shaft, in such a way that a distance between the lower suspension part and upper suspension part can be varied as a result of the coupling rod rotating.

Abstract: An upright active-sitting seat provides a connection of a seating leg to a base through an articulating joint that allows the user to move a seat front to back and side to side, allowing a more active sitting that encourages blood circulation. The chair includes a seat supported by a post that is connected to a mount via a ball joint rod by a transverse rod that is routed through the ball joint rod end. By way of a coil spring that engages with the mount and the post, the post is spring biased to a home position relative to the mount. When using the chair, a person may move the seat from the home position to a comfortable seating position. When the person stands from the chair after using it, the chair returns to its spring biased home position.

Abstract: A strut including a housing, a plunger within a space in the housing and including a tapered outer circumferential surface, a primary spring engaged with the housing, a wedge element within the space and including a tapered inner circumferential surface engageable with the outer circumferential surface, and a secondary spring engaged with the wedge element and the plunger to urge the plunger in an axial direction. The primary spring urges the plunger in the axial direction with a first force. In a fully extended mode, the plunger is maximally displaced in the axial direction. In a contracted mode, the plunger is displaced in an opposite axial direction in response to application of a second force, sufficiently greater than the first force, on the plunger in the opposite axial direction. When the second force is sufficiently decreased, the plunger displaces with respect to the housing in the axial direction.

Abstract: An apparatus for supporting a person's upper torso while kneeling and leaning forward against another substantially vertical surface while keeping the user's hands free. The device features a horizontal base connected to a rigid, canted support structure that extends up and away from the base to a planar surface. The support structure can be outfitted with a support member to contact the substantially vertical surface and provide further stability. Furthermore, the device can be outfitted with a horizontal tray including a reservoir to store tools and other objects.

Abstract: A holder assembly for supporting a displaying device is disclosed in the present invention. The holder assembly includes a base, a brace and a supporting arm. An end of the brace is connected to the base, and a sphere is disposed on the other end of the brace. An end of the supporting arm is connected to the displaying device, and a pivot portion is disposed on the other end of the supporting arm. The pivot portion corresponds to the sphere, and the sphere is rotatably disposed on the pivot portion. Comparing to the prior art, the present invention has preferable convenience.

Abstract: The present invention relates to a support structure. A main hinge of the structure is installed with a stop mechanism, so when an object to be supported is placed at a higher location while being in an unfolding state, the object to be supported is restrained from being rotated from a vertical state to a horizontal folding state, thereby preventing falling due to the unstable gravity center; when a connection unit is folded towards a base, an upper end of a first auxiliary connection member links the stop mechanism to rotate for gradually altering the stopping location, so the object to be supported is enabled to be horizontally folded; as such, the object to be supported can be maintained in a stable state during the folding process, thereby preventing the occurrence of falling.

Abstract: A support device is disclosed. The support device includes a connecting element and a first support frame. The connecting element is used for connecting the support device to a portable electronic device and includes a plurality of positioning protruding points. One end of the first support frame includes a positioning hole used for connecting to one of the plurality of the positioning protruding points; another end of the first support frame contacts a plane so that a clamping angle between the portable electronic device and the plane is formed, and the clamping angle is different if the positioning hole connects to different positioning protruding points.

Abstract: A fastening device (6) for detachably fastening a first component (4) to a second component (5), especially to a motor vehicle. A bearing block (7), which has a stay bolt (13), is fastened to one component (5). The bearing block (7) has an anchor bracket (8), which is fastened to the other component (4) and which has an anchor hook (15) for hooking onto the stay bolt (13). A locking device (16) is provided which can be adjusted between a locking state, in which anchor hook (15) can be hooked into and detached from the stay bolt (13), and an unlocking state, in which stay bolt (13) is fixed to the anchor hook (15) hooked into same.

Abstract: An angle-adjustable support includes a base, a carrier and a pivot mechanism. The base includes a sidewall and a bottom. The sidewall has a first pivot and a second pivot. The pivot mechanism pivotally connects the carrier with the base. The pivot mechanism has three working states. The carrier is locked when the pivot mechanism works in a first working state. The carrier is capable of pivoting relative to the base in a clockwise or anticlockwise when the pivot mechanism works in a second working state. The carrier is free to rotate when the pivot mechanism works in a third working state.

Abstract: A base assembly removably and adjustably receives a tool and includes a base and a wall extending outwardly from the base. First and second openings are disposed in the wall. First and second cutouts are disposed in the wall to receive the tool. A pivot pin is removably received by the first and second openings. The tool is removably disposed on the pivot pin. A locking ring is disposed on the pivot pin. The locking ring is in a locked position to prevent movement of the pivot pin and in an unlocked position to allow movement of the pivot pin, thereby allowing the tool to be easily moved between positions and securely locked in a desired position.

Abstract: The instant disclosure relates to an angle adjustable device, which includes: a base having a fixing member disposed thereon, where the fixing member has a fixing surface; a switch mechanism having a locking ring, a first gear, and a second gear, while at least one block protrudes from the inner surface of the locking ring, with the first gear having a contact incline slidingly abutted by the block, where the contact incline is defined with a first end and a second end, where the first gear is received by the locking ring and capable of meshing with the second gear; and a rotator having at least one connecting member connected to the second gear. The instant disclosure also discloses an electronic display unit using the same.

Abstract: An archery target stand having a pair of vertical supports adjustably attached to a horizontal platform, an elastic retaining means for securing block targets to the platform and a pair of base members adjustably attached to the distal ends of the vertical supports to provide axial adjustment for the target is easily transported to the range or into the field to offer a safe, secure and accurate target shooting experience.

Abstract: A support device is disclosed. The support device includes a connecting element and a first support frame. The connecting element is used for connecting the support device to a portable electronic device and includes a plurality of positioning protruding points. One end of the first support frame includes a positioning hole used for connecting to one of the plurality of the positioning protruding points; another end of the first support frame contacts a plane so that a clamping angle between the portable electronic device and the plane is formed, and the clamping angle is different if the positioning hole connects to different positioning protruding points.

Abstract: A rotating and tilting cake stand comprising a rotation assembly, a base assembly, and a platter. The rotation assembly has a fixed portion and a rotatable portion. A rotation control mechanism controlling the rotation of the rotatable portion relative to the fixed portion. The base assembly has a base portion and a support portion that connects to the rotation assembly. Within the base assembly is a tilt-support arm that is connected to the rotation assembly and support portion with a pin that allows the tilt-support arm to pivot, causing the platter to tilt. In the base portion, a lock engages the tilt-support arm to either inhibit or allow the tilt-support arm to move freely. The lock is manipulated by a button in the base portion that is connected to a rotational pivot that is connected to the lock.

Abstract: A connection mechanism is used for rotatably connecting a first object and a second object. The connection mechanism includes a positioning member capable of being inserted in a first fixing hole defined in the first object and the engaging hole defined in the second object for connecting the first object and the second object. The positioning member is slidable in the first fixing hole and in the engaging hole to interchange between a first position and a second position, the positioning member is received in the first fixing hole and the engaging hole to restrict the first object from rotating relative to the second object in the first position, and at least move out of the first fixing hole or the engaging hole to allow the first object to rotate relative to the second object in the second position.

Abstract: A base assembly removably and adjustably receives a tool and includes a base and a wall extending outwardly from the base. First and second openings are disposed in the wall. First and second cutouts are disposed in the wall to receive the tool. A pivot pin is removably received by the first and second openings. The tool is removably disposed on the pivot pin. A locking ring is disposed on the pivot pin. The locking ring is in a locked position to prevent movement of the pivot pin and in an unlocked position to allow movement of the pivot pin, thereby allowing the tool to be easily moved between positions and securely locked in a desired position.

Abstract: A base assembly removably and adjustably receives a tool and includes a base and a wall extending outwardly from the base. First and second openings are disposed in the wall. First and second cutouts are disposed in the wall to receive the tool. A pivot pin is removably received by the first and second openings. The tool is removably disposed on the pivot pin. A locking ring is disposed on the pivot pin. The locking ring is in a locked position to prevent movement of the pivot pin and in an unlocked position to allow movement of the pivot pin, thereby allowing the tool to be easily moved between positions and securely locked in a desired position.

Abstract: An electronic device holder is revealed. The electronic device holder includes a base, a top cover and a support member. In use, a control member of the support member is pressed so that a locking shaft is moved inwards to push a shaft part moving into a pivot hole of an assembly block of the base. And a teeth part around the shaft part is released from teeth of a locking hole. Thus the support member can be rotated to the required position. Without any force applied to the control member, the teeth part of the shaft part is engaged with the teeth of the locking hole again due to the elastic member. Thus the support member is locked, the support block is then rotated to the required position and an electronic device is leaning against the support member. Therefore users can use electronics conveniently, without holding them in hands.

Abstract: A method of locking of and a directionally adjustable mount including a first plate arranged to stabilize an anisotropic device, a second plate arranged to engage the first plate and provide a support, a second supporting member arranged to engage the second plate and to rollably support the first plate so as to define a local spacing between the plates, and a first supporting member arranged to have a first axis of symmetry and to contact the first plate and engage the second supporting member. In a locked position, the supporting members are arranged coaxially regarding the axis of symmetry, such that a sum of a positioning force applied by the first supporting member and a locking force applied by the second supporting member upon the first plate substantially vanishes, so that a resulting local moment of force oriented to deform the at least one first plate also substantially vanishes.

Abstract: An electronic device holder is revealed. The electronic device holder includes a main body, an adjustment member, a fixing part and at least one stopper. The main body consists of a supporting part and a blocking part. An electronic device is arranged at the blocking part while the supporting part holds the electronic device and the stopper is against the electronic device. One end of the adjustment member is fixed on the supporting part and the other end thereof is attached to the fixing part. An angle between the supporting part and the blocking part is adjusted by the adjustment member and the fixing part. Thus the mounting angle of the electronic device meets users' needs. The angle between the supporting part and the blocking part is changed along with the position of the adjustment member attached to the fixing part.

Abstract: A bracket for supporting an electronic device includes a receiving part, a rotating arm, a base, and a locking device. Two opposite ends of the rotating arm are connected to the electronic device and the base. The locking device includes a locking mechanism positioned on the rotating arm, and a locked part positioned on the base. The locking mechanism includes a locking member, an elastic member, and an operating member. The locked part defines a locked position and an unlocked position, the locking member is capable of moving from the locked position to the unlocked position, the elastic member provides an elastic force to keep the locking member in the locked position so that the rotating arm stops moving, the operating member is operable to enable the locking member to overcome the elastic force to move to the unlocked position so that the rotating arm is capable of rotating.

Abstract: The present invention discloses a slidable support stand including a base, a cover and a support piece. The cover is disposed to the base and includes a first cover body and a second cover body. The first cover body is capable of rotating about the base, and the second cover body is pivoted to the first cover body and is capable of rotating about the first cover body. The support piece is disposed to one side of the base and is capable of sliding relative to the base. When the support piece slides out of the side of the base and the second cover body flips to the side of the base, the second cover body leans against the support piece, and thus the first cover body can be used for supporting a tablet computer or a handheld communication device.

Abstract: An electronic device holder is revealed. The electronic device holder includes a base, a top cover and a support member. In use, a control member of the support member is pressed so that a locking shaft is moved inwards to push a shaft part moving into a pivot hole of an assembly block of the base. And a teeth part around the shaft part is released from teeth of a locking hole. Thus the support member can be rotated to the required position. Without any force applied to the control member, the teeth part of the shaft part is engaged with the teeth of the locking hole again due to the elastic member. Thus the support member is locked, the support block is then rotated to the required position and an electronic device is leaning against the support member. Therefore users can use electronics conveniently, without holding them in hands.

Abstract: A supporting pedestal capable of adjusting an azimuth angle of an antenna system is disclosed in the present invention. The angle adjusting mechanism includes a main body and a tube. The main body includes a base, a first board and a second board. The first board and the second board are respectively disposed on two sides of the base. A first pivot hole and a first slot are formed on the first board. A second pivot hole is formed on the second board. The main body further includes a rib disposed on an edge of the base and connecting the first and second boards for preventing the first and second boards from bending relative to the base. The first and second pivot holes are respectively formed on the sides of the first and second boards adjacent to the rib. The tube pivots relative to the main body.

Abstract: A connection mechanism is used for rotatably connecting a first object and a second object. The connection mechanism includes a positioning member capable of being inserted in a first fixing hole defined in the first object and the engaging hole defined in the second object for connecting the first object and the second object. The positioning member is slidable in the first fixing hole and in the engaging hole to interchange between a first position and a second position, the positioning member is received in the first fixing hole and the engaging hole to restrict the first object from rotating relative to the second object in the first position, and at least move out of the first fixing hole or the engaging hole to allow the first object to rotate relative to the second object in the second position.

Abstract: A supporting pedestal capable of adjusting an azimuth angle of an antenna system is disclosed in the present invention. The angle adjusting mechanism includes a main body and a tube. The main body includes a base, a first board and a second board. The first board and the second board are respectively disposed on two sides of the base. A first pivot hole and a first slot are formed on the first board. A second pivot hole is formed on the second board. The main body further includes a strengthening rib disposed on an edge of the base and connecting the first and second boards for preventing the first and second boards from bending relative to the base. The first and second pivot holes are respectively formed on the sides of the first and second boards adjacent to the strengthening rib. The tube pivots relative to the main body.

Abstract: A terminal apparatus includes a portion (12) having an operation portion, a pedestal (20) which holds the main-body base portion (12) so as to be tiltable, a hook (31) which fixes the main-body base portion (12) in a tilting state at plural predetermined angles, a tooth row (224) which has teeth and engages with the hook (31) to fix the main-body base portion (12) in the tilting state at plural predetermined angles, a cam (33) which moves within the main-body base portion (12) in accordance with the tilt angle of the main-body base portion (12), and a cam control groove (226) which controls the movement of the cam (33), wherein when the hook (31) moves over the tooth at the uppermost step of the tooth row (224), the hook rides on the cam (33) thereby to release the engagement with the tooth row (224), then the hook moves downward in a state of riding on the cam (33), then the main-body base portion (12) releases the tilting and moves downward to restore to an initial position.

Abstract: An adjustable support in the form of a headrest comprises a flexible arm (2) carrying a bifurcated branches (3a). The arm (82) is made up of identical segments (20) that can pivot in relation to each other. A wire (5) holds the arm (2) together and may be loosened by an adjusting mechanism (6) controlled by a knob (9). Partially cylindric surfaces (27, 29) on opposing ends (21, 22) of segments (20) have teeth-like projections extending transversely of the partially cylindric faces (27, 29) for mutual engagement and securing mutual position of adjacent segments (20). The adjustable support is thus able to carry greater loads than prior art adjustable supports.