Abstract: The length adjustment of an expandable rod is attained by a drive gear and a driven gear which is engaged with the drive gear and gear slots of an inner tube of the expandable rod. The inner tube is located inside an outer tube of the expandable rod by a locating member which is provided with a locating projection capable of locating in one of the gear slots of the inner tube.

Abstract: A coaxial cable extender having only two parts overcomes the complexity of prior devices while maintaining functionality. The extender includes a sleeve, attached to a conduit of the coaxial cable, having a ratchet toothed rack and a slider received on the sleeve. The slider has an integral arm with ratchet teeth biased against the ratchet toothed rack such that the slider may be ratcheted along the ratchet toothed rack to extend the effective length of the conduit.

Abstract: A rack includes a horizontal framework for holding or displaying various things. The horizontal framework can be adjusted in height by a plurality of expandable units by which the horizontal framework is mounted on a base. The expandable units are formed of an outer tube, and an inner tube slidably fitted into the outer tube in conjunction with a locating structure having a cylindrical seat, a sleeve, and an elastic lock ring. The lock ring is retained in one end of the sleeve which is rotatably fastened to the cylindrical seat. The bottom end of the inner tube is slidably fitted into the top end of the outer tube and is embraced by the lock ring which is made compact to embrace tightly the bottom end of the inner tube when the sleeve is turned clockwise. The lock ring is relieved of the pressure when the sleeve is turned counterclockwise.

Abstract: A box tube clamping system featuring a variable geometry clamp for secure joining of telescoping box tubes. A variable geometry clamp aligns between an inner and an outer box tube and includes a center wedge plate flanked by adjoining wedge plates which are advanced towards the center wedge plate to force the center wedge plate in an upward direction to force the outer box tube and the inner box tube into forced and secure intimate frictional engagement. Installation spacers are included for use with the variable geometry clamp to provide user friendly accommodation of an inner box tube past and along the variable geometry clamp mounted in one end of the outer box tube.

Abstract: A shaft telescopic device includes a shaft base, a fixed shaft with a leader pin on the upper end thereof, a joint plate assembly, and a pull link covers around the leader pin upon the shaft base. The joint plate assembly is disposed inside the fixed shaft, which is crisscrossed by a plurality of plates having upper, center, and lower positioning sections. By controlling the compression and extension status of the joint plate assembly, the upward and downward movements of the pull link thereby allowing the provision component inside the fixed shaft to achieve the purposes of closing or of usage.

Abstract: An outer shaft is spline-fitted to an inner shaft and, after thus assembling the shafts, an adjustment screw is moved inwards in the radial direction while being fastened. An interval in the radial direction between a screw member and a receiving member of a diameter-expanding member is thereby expanded, thereby thrusting the inner shaft outward in the radial direction against the outer shaft. A thrusting force acting in the radial direction on the inner shaft against the outer shaft can be adjusted by controlling a fastening force of the adjustment screw. It is therefore possible to easily adjust a slide resistance between the two shafts and surely prevent a “backlash” between the two shafts.

Abstract: A telescoping pole assembly for an erectable, collapsible shelter, includes first and second hollow telescoping sections slidably connected together, the first telescoping section being slidably disposed within the second telescoping section, and a spring loaded detent pin mounted to the second telescoping section. A weighted internal stop member is slidably disposed within the first telescoping section for movement between a first position and a second position. The internal stop member blocks the spring loaded detent pin in the first position, and the internal stop member does not block the spring loaded detent pin in the second position.

Abstract: Extending ladders and associated manufacturing methods are disclosed. A ladder in accordance with an exemplary embodiment of the present invention comprises a plurality of rung units, each rung unit including a left column, a right column, and a rung extending between the left column and the right column. The ladder may include a first column assembly including a first column and a ring coupled to the first column proximate a distal end thereof, and a second column assembly including a second column and a sleeve coupled to the second column proximate a proximal end thereof. The second column being at least partially disposed within a lumen defined by an internal surface of the first column. The sleeve includes an external guiding surface for contacting the internal surface of the first column and the ring includes an internal guiding surface for contacting an exterior surface of the second column.

Abstract: A joint for a telescoping rod includes a body having a cavity defined in the body to receive a sleeve in the body. A hole is longitudinally defined in a lower portion of the body and communicates with the cavity. The telescoping rod includes an outer tube securely inserted into the hole in the body and an inner tube inserted into the body. The inner tube penetrates the sleeve and is partially received in the outer tube. A locking member is rotatably mounted on the body and has a threaded rod screwed into the sleeve to cause the sleeve to make the inner tube securely abut the inner periphery of the outer tube.

Abstract: Two telescopic lifting beams are loaded in their protruded position and are driven from a retracted position to a protruded position. In order to improve the bending strength of the lifting beams, the lifting beams are surrounded by two telescopic tubes (4, 5), one (4) of the tubes being fixed to the outer end (6) of the telescopic first lifting beam (1) and is slideable on the second telescopic tube (5), which extends inwardly on the second lifting beam (2).

Abstract: A light weight surveying pole which is of robust and highly accurate construction. A lock for fixing telescoping sections of the pole provides fixed positioning without high initial clamping forces. An air cushion system inhibits damaging the pole sections when they are retracted, but the pole sections can be simply pulled apart without any other required disassembly for cleaning or repair. Fittings for use in screw-together pole sections are constructed to permit location within mating pole sections prior to application of adhesive for greater precision and maintenance of coincident axes of the pole sections when screwed together. Also, the end faces of the fittings are particularly formed to facilitate complete face-to-face contact and avoid misalignment when the fittings are attached. A cover can be attached over a point of the surveying pole when the point it not needed, and the cover can be stowed on the surveying pole when the point is used.

Abstract: The present invention relates to a universal joint which includes a slip joint in which a shaft is inserted into an interior of a hollow pipe for thereby implementing a rotation force transferring and slipping operation, a hollow yoke joint installed at both sides of the slip joint and having one side which surrounds the pipe and shaft, and an elastic means inserted between the pipe and shaft and both ends of the slip joint and the yoke joint for generating an elastic force in a radial direction.

Abstract: A removable bicycle beam for adapting a bicycle frame for engagement with a vehicle-mounted bicycle rack. The beam includes a pair of securing mechanisms disposed on opposite ends of a central body. Each securing mechanism includes a fixed arm fixedly secured to the central body and a pivoting arm pivotally secured to the central body. Each arm includes a gripping portion extending outwardly from the central body that cooperates with the gripping portion of the other arm to releasably encircle and engage a component of the bicycle, such as the handle bar stem or the seat post. The pivoting arm and fixed arm lie in a substantially horizontal plane when in a closed position, and the pivoting arm is movable in the horizontal plane toward and away from the fixed arm. Each pivoting arm can be locked in a closed, engaged position by one of a pair of releasable latch mechanisms disposed within the central body and engagable with the pivoting arms.

Abstract: A pull pin assembly includes: a first pole having a first hole; a second pole having a second hole, and sliding in the first pole; a main body having a central hollow containing the first pole; a pull pin body extending radially from the central hollow, and having a space extending into the central hollow; a pull pin, having a circumferential stop, disposed in the space to move from a first position extending into the central hollow through the first hole to a second position outside the central hollow; a pull pin plug fit into the space and having a hollow containing the pull pin; and a biasing member biasing the pull pin toward the second position to lock the first and second poles; wherein the biasing member is disposed to bias the pull pin between the circumferential stop and the pull pin plug.

Abstract: The invention relates to a kit of threaded rods and tubes. The object of the invention is to develop a kit of threaded rods and tubes with which many combination possibilities of threaded rods with tubes and of tubes amongst one another is possible. This object according to the invention is achieved in that in a kit consisting of threaded rods and tubes, to a standardised threaded rod there is allocated a tube whose inner diameter envelops the threaded rod at a distance and whose outer diameter is smaller than the inner diameter of the tube of the next larger threaded rod-tube allocation.

Abstract: A juice extractor includes a strainer tube mounted to receive juice and pulp of fruit. An orifice tube is moveable within the strainer tube and includes a first tube portion and opposing second tube portion threaded within the first tube portion. A drive mechanism engages the orifice tube for reciprocating the orifice tube within the strainer tube and separating juice and pulp within the strainer tube.

Abstract: A chair comprises an arm mechanism and a back mechanism each having an adjustment screw for releasably securing a sleeve and a shroud to a J-bar so that a height of either arm or back mechanism can be adjusted relative to the j-bar. Also, a protruded enlargement is formed at a top end of the upright backrest support.

Abstract: An apparatus to reposition a temperature indicator stick for welding, metal fabrication, and heat treatment is disclosed. The apparatus includes a housing having an outer surface and an inner chamber to receive a temperature indicator stick therein. An advancement mechanism is positioned about the outer surface of the housing, and is capable of contact with a temperature indicator stick positioned in the chamber of the housing to advance the temperature indicator stick with motion applied to the advancement mechanism.

Abstract: A camming coupler for removably attaching a music desk to an upright support of a music stand is disclosed. The camming coupler includes an inner sleeve for receiving the upright support. The inner sleeve has at least one longitudinal slit formed therein, and preferably has four substantially equidistant longitudinal slits. The inner sleeve also has a cammed exterior surface. An attachment member extends from the inner sleeve, and is pivotally attachable to the music desk. The camming coupler further includes an outer sleeve positioned over the inner sleeve. The outer sleeve has a cammed interior surface that corresponds with the cammed exterior surface of the inner sleeve. In use, the camming coupler is secured to a music desk. The upright support of a music stand is then inserted in the inner sleeve, and the outer sleeve is rotated to compress the inner sleeve.

Abstract: The erectable, collapsible shelter has a canopy with at least three sides and three corners, a leg assembly, and a perimeter truss linkage assembly having a plurality of perimeter truss pairs of link members connected to the leg assembly. The legs preferably have telescoping upper and lower sections with lower section for engagement with ground, and a slider member slidably mounted to the upper section of each of the legs. A canopy peak support assembly is provided that is movable between a raised position and a lowered position, with the canopy peak support assembly supporting the canopy above the top of the leg assembly in the raised position.

Abstract: A stageless adjusting/locating device for various kinds of sticks enables both right-handed user and left-handed users to conveniently stagelessly adjust the length of a stick. The stick is composed of multiple telescopic fitting tubes including mother fitting tubes and daughter fitting tubes nested in the mother fitting tubes. The adjusting/locating device is disposed at each of the mother and daughter fitting tubes. The adjusting/locating device includes a screw member formed by a threaded rod having outer threads and a locking member composed of two semicylindrical bodies mating with the threaded rod. A fastening ring is fixedly fitted around the locking member. The inner circumferential faces of the two semicylindrical bodies are formed with inner threads. An upper and a lower end of the inner threads are formed with thick sections converging from thin sections. The inner wall faces of the thick sections are formed with semielliptic arch faces.

Abstract: A telescoping joint assembly and a method for making a telescope joint assembly 10. The joint assembly 10 has a pair of members 12, 14 which are telescopically engaged. Assembly 10 further includes a resinous, plastic and/or polymer material 16 which shrinkably coats or lines the inner shaft 12 after the inner shaft 12 is heated and exposed to a substantially inert gas, thereby providing a relatively durable and substantially “low friction” bearing or surface 18 which is effective to promote and/or assist the telescopic sliding motion between the members 12, 14.

Abstract: A variable length shaft is provided including a housing defining an internal space. A shaft is connected to a plunger device disposed in said internal space. The internal space is filled with magneto-rheological fluid which is selectively provided with a magnetic field for solidifying the fluid to prevent movement of the plunger within the internal space. When the magnetic field is removed, the plunger device moves freely for allowing variation in the length of the variable length shaft system.

Abstract: A length-adjustable ground-working tool for allowing the user to adjust the length of the handle assembly for the ground-working tool. The length-adjustable ground-working tool includes a ground-working member; and also includes a handle assembly including a first tubular member being attached to the ground-working member and also includes a second tubular member being telescopingly connected to the first tubular member, and further includes a handle member being mounted to an end of the second tubular member; and further includes a fastening assembly including first and second bracket members for securely fastening the first and second tubular members together.

Abstract: A replaceable top tube includes an outer tube and an inner tube retractably received therein. Two sleeves are respectively connected to the outer tube and the inner tube, and two locking plates are respectively connected to the two sleeves. Two hooks are respectively connected to the inner tube and the outer tube so that when the sleeves are pulled, the locking plates are moved away from the hooks so as to hook the seat post and the handlebar stem of a bicycle. Each of the two sleeves are positioned by a resilient member.

Abstract: A system including a retaining member passing through an element and connected at one end to a structure and bearing at the other end on an external side of the element; a separating mechanism for separating the member from the structure to move the element from a folded position to a deployed position; and a drive mechanism for pulling the corresponding part of the retaining member outwards after actuation of the separator mechanism. The system has a device which includes a barrel receiving the retaining member concentrically, cut-outs in the wall of the barrel forming spring tongues adapted to be bent wholly or partially towards the inside of the barrel in order to come into contact with the part, an enlargement of which is adapted to cooperate with the tongues to hold the member after actuation of the drive mechanism.

Abstract: A binding mounting system for rapidly mounting a slidable front jaw and a slidable heel jaw of a ski binding onto a ski having a top face, comprises a plate-shaped base element having a bearing surface and mounted on the top face of the ski, front rear longitudinal guide mechanisms on the base element, the guide mechanisms preventing vertical and transverse displacements of the front jaw and the rear jaw to be mounted on the base element relative to the bearing surface thereof, and a positioning and locking device immobile relative to the base element and mounted thereon between the front and rear longitudinal guide mechanisms at a distance therefrom. The positioning and locking device has a top face remote from the base element and at least one rigid raised portion with steep flanks on the top face.

Abstract: A locking mechanism for a telescopically adjustable extension pole is disclosed. The locking mechanism includes a collar member and a locking trigger mechanism preferably comprising a bottom trigger member and a top trigger member having a locking pin therein. The top trigger member grippingly engages the collar member which is attached to the outer sleeve of the pole. By depressing the bottom trigger member, the top trigger member moves laterally outwardly retracting the locking pin from an aperture in the inner sleeve permitting the length of the extension pole to be telescopically adjusted. By releasing the bottom trigger member, the top trigger member moves laterally inwardly causing the locking pin to be received within an aperture in the inner sleeve so as to interlock the inner sleeve within the outer sleeve at the approximate desired length of the extension pole.

Abstract: An adjustable telescoping utility pole apparatus formed from a number of inter-received tubular members, compression springs and a novel release assembly mechanism. Each tubular member is self extended via the compression spring and controlled by the release mechanism located in the base handle assembly.

Abstract: A pipe linkage between a larger diameter pipe and a smaller diameter pipe installed in the larger pipe. A compressible bush at the inserted end of the smaller pipe is compressed by a bolt and swollen to adhere in the smaller pipe and a larger diameter exposed collar on the bush will contact the interior of the larger pipe, precluding metal noise generation upon relative tilting of the pipes.

Abstract: A support stand includes a locking unit for adjusting its height and a support unit for angular adjustment in a horizontal plane. The locking unit includes a center bar fixed to the lower end of an outer pipe, a mesh sleeve unit having a mesh sleeve, upper and lower sliding bushes respectively connected to the mesh sleeve, a coil spring arranged between the upper and lower sliding bushes, a spacer sleeve arranged above the upper sliding bush and loosely fitted on the center bar and in the inner pipe whose lower end is fixed to the lower sliding bush, and an actuator sleeve provided around the inner pipe and connected to the inner pipe in a manner movable with the aid of a cross pin passing through axially elongated apertures formed in the inner pipe.

Abstract: An adjustable length shaft assembly including a handle portion and an extensible shaft. An upper end of the shaft includes a set of locking teeth. The handle has an internal locking mechanism with a tooth rack to accommodate the locking teeth. A control handle is rotated in a first direction, rotating the teeth away from the tooth rack, where the teeth are in a disengaged, unlocked position. With the teeth unlocked, the shaft can be longitudinally adjusted to achieve the desired length. Then, the control handle is rotated in a second direction, rotating the teeth into the tooth rack, where the teeth are in an engaged, locked position. In this manner, the teeth and the tooth rack provide a plurality of positive locking positions, each position providing a different shaft length.

Abstract: A lock for securing first and second telescoped pole sections includes a base defining a through-bore for receipt of an end of a first pole section. A neck projects from the base and a collar is connected to the neck. The collar defines an opening aligned with the bore of the base. The collar receives a second pole section that is telescoped into the first pole section. A fastener is connected to the collar and a threaded end thereof projects from the collar. A lever control member is mated with the threaded end of the fastener and is movable to selectively radially constrict the collar. The fastener is rotatable relative to the collar but is frictionally engaged with the collar to prevent its unintended rotation. As necessary, the fastener is rotated relative to the collar to adjust the amount that the lever is advanced thereon.

Abstract: Adjustable locking and unlocking structure for a telescopic tube, including two locating members mated with each other, an actuating push plate, a restoring spring, a main restricting plate, a subsidiary restricting plate, several restricting rings, a compression spring and an adjustment rod. The inner face of each of the locating members is formed with a central arch channel for the adjustment rod to pass therethrough. A middle rear section of the arch channel is cut with a trapezoid restricting cavity. A front and a rear walls of the tapered restricting cavity are formed with slope sides. Each of the main and subsidiary restricting plates includes a circular restricting ring section and a bent press section integrally connected with upper side of the restricting ring section. The restricting ring section is formed with a central restricting hole.

Abstract: An umbrella device incorporating an engaging mechanism for securing the umbrella to fixed location. The device includes an elongated shaft having a top end and a bottom end and which is capable of being extended across an overall axial length. A fabric covering portion is supported by an outwardly actuable frame secured to the shaft, the frame including a plurality of elongate and arcuate ribs to which is secured the fabric covering portion. An annular collar is mounted about the elongated shaft in axially extending fashion. An additional plurality of supporting ribs extend from the collar, each of the supporting ribs engaging an associated fabric securing rib so that, upon a selected upward axial extension of the collar, the frame is engaged in the outwardly actuated manner. A substantially “C” shaped clamp is secured in axially slidable fashion along the extended axial length of the shaft, the clamp affixing the umbrella device to a substantially horizontally extending ledge support.

Abstract: In an adjustable-length shaft (1) for transmitting torques comprising a circular inner shaft component (2) that is mounted coaxially through a linear ball bearing for sliding telescopically in axial direction in a hollow outer shaft component (3), the inner shaft component (29 is mounted by two spaceed-apart pre-stressed linear ball bearings (4) that are arranged on opposite end sections (6) of the inner shaft component (2) and are received in a reception bore (19) of the outer shaft component (3), a transmission of torque being achieved by a positive engagement of the inner and the outer shaft components (2, 3).

Abstract: A length-adjustable extension pole with telescoping members includes an accessory-actuating cable that automatically adapts its operative length in concert with length adjustment of the pole without separate action by a user. The cable runs within the telescoping members between a pole accessory end where an accessory is mounted and a pole handle end where a pole trigger lever is located. A first cable component, typically including a cable attached to a rack (or a notched or threaded rod), runs from the pole accessory end toward the pole handle end. A second cable component runs from the trigger lever on the pole handle end toward the pole accessory end overlapping the first cable component.

Abstract: The erectable, collapsible shelter has a canopy with at least three sides and three corners, a leg assembly, and a perimeter truss linkage assembly having a plurality of perimeter truss pairs of link members connected to the leg assembly. The legs preferably have telescoping upper and lower sections with lower section for engagement with ground, and a slider member slidably mounted to the upper section of each of the legs. A canopy peak support assembly is provided that is movable between a raised position and a lowered position, with the canopy peak support assembly supporting the canopy above the top of the leg assembly in the raised position.

Abstract: A collapsible cane for aiding a user to walk. The collapsible cane includes an elongate member. The elongate member has a plurality of tubular members. The tubular members include a plurality of intermediate tubular members extending between a first tubular member and a second tubular member. The elongate member is telescoping. A handle means for carrying the elongate member includes a housing, which is coupled to the first tubular member. An extension system selectively secures the elongate member in an extended position. The extension system comprises a plurality of locking pins. The locking pins are adapted to selectively lock a tubular member in a fixed position with relation to an adjacent tubular member. A draw line is coupled to the locking pins and is adapted to selectively remove the locking pins and unlock a tubular member from the fixed position.

Abstract: A bar (25) for holding open a cover (4) hinged on the nacelle enclosing an aircraft engine (7) comprises two sections (26 and 28) of unequal length, one of which is hinged (27) on the cover (4) and the other (30) on the engine (7). The mechanism for locking or unlocking the sections (26 and 28) is controlled by a handle adjacent to the cover hinge (27). The bar can therefore be controlled by the very operator who is responsible for raising the cover (4).

Abstract: The erectable, collapsible shelter has a canopy with at least three sides and three corners, a leg assembly, and a perimeter truss linkage assembly having a plurality of perimeter truss pairs of link members connected to the leg assembly. The legs preferably have telescoping upper and lower sections with lower section for engagement with ground, and a slider member slidably mounted to the upper section of each of the legs. A canopy peak support assembly is provided that is movable between a raised position and a lowered position, with the canopy peak support assembly supporting the canopy above the top of the leg assembly in the raised position.

Abstract: The invention relates to a connecting piece which can be pivotally connected both to the jib of an excavator and to a setting cylinder connected to a jib, and which is intended for linking up a tool, such as an excavator bucket, for example, to the end of the jib. A connecting wedge is connected to the connecting piece, in which two pins extending perpendicularly to the longitudinal direction of the wedge and being guided in the connecting piece are mounted. An adjusting element is connected to the connecting piece, by means of which the connecting wedge can be moved in a direction transversely to its longitudinal direction. The connecting piece comprises a screw spindle, which is journalled in the connecting wedge and which is screw into a nut-shaped member connected to the connecting piece.

Abstract: A planing machine includes a carriage locking mechanism disposed above a cutter carriage, which in turn, is connected movably to upstanding posts of a machine base that is disposed below the cutter carriage. The locking mechanism includes a pair of post bracing members, each of which extends at one side of a respective pair of the posts, and has two post embracing units that embrace the respective pair of the posts. The post bracing members are mounted on the carriage. A right regulator plate is disposed above the carriage, and has a first end portion connected pivotally to the right post bracing member, and a second end portion formed with a wheel accommodating slot. A left regulator plate has a first end portion fixed to the left post bracing member, and a second end portion overlapping the second end portion of the right regulator plate.

Abstract: Temporary and long term guard rail systems for use by residential and commercial builders on construction sites to prevent accidental falls that can result in serious bodily injuries. The systems meet the standards of fall protection as specified by OSHA including those on safety issues concerning protrusions that can cause lacerations and present clothing snag hazards. The system includes a plurality of vertical posts/stanchions having side rail mounting points that do not present laceration and clothing snag hazards. The posts/stanchions include rotatable collars with internally threaded holes that create mounting points for the side rails that are capable of rotating along the Y and Z axes of the posts/stanchions allowing the interconnection of horizontal guardrails. The side guardrails can include telescoping tubular adjustable lengths or have a fixed length.

Abstract: A mirror assembly has a pair of telescoping tubular supports extending between a support base and a mirror head to provide adjustment of the mirror head toward and away from the support base. Friction shoes within the tubular supports releasably hold such supports against unintentional telescoping movement. Cooperating stops on the telescoping supports limit outward movement of the mirror head and prevent complete separation of the telescoping supports. The tubular supports are hingedly attached to the support base for rotation about a vertical axis, and cooperating detents and spring elements on the supports and support base releasably hold the supports against rotation.

Abstract: A telescopic shaft for rapid length adjustment consists of a tube having a plurality of alternating circumferential ridges and grooves on at least a portion of an inner surface and having an oval cross-section with a major diameter DA and a minor diameter DB; a shaft disposed within the tube and having matching circumferential ridges and grooves, the shaft also having an oval cross-section with a major diameter DC and a minor diameter DD; and the ridges and grooves of the tube interengaging with the grooves and ridges of the shaft when the shaft major diameter DC is substantially parallel with the tube minor diameter DB.

Abstract: A locking mechanism for a telescopically adjustable extension pole is disclosed. The locking mechanism includes a collar member and a locking trigger mechanism preferably comprising a bottom trigger member and a top trigger member having a locking pin therein. The top trigger member grippingly engages the collar member which is attached to the outer sleeve of the pole. By depressing the bottom trigger member, the top trigger member moves laterally outwardly retracting the locking pin from an aperture in the inner sleeve permitting the length of the extension pole to be telescopically adjusted. By releasing the bottom trigger member, the top trigger member moves laterally inwardly causing the locking pin to be received within an aperture in the inner sleeve so as to interlock the inner sleeve within the outer sleeve at the approximate desired length of the extension pole.

Abstract: The present invention relates to a length-adjustable tube for ski poles or walking sticks, comprising on outer tube and a telescopically foldable inner tube which be inserted into the outer tube to adjust the length of the tube. Also included, is a expansion device with an expansion element which is held on the insert section of the inner tube and which can be pressed apart by exerting a quasi-radial pressure. The expansion device enables the inner tube to be axially and tightly clamped in the outer tube. In order to ensure that the expansion device engages inside the outer tube in all cases, it is provided that the expansion element pertaining to the expansion device if fitted on the area where it can be pressed apart by exerting a quasi-radial pressure with at least one soft-elastic friction element compensating diameter tolerance between the inner and outer tube and protruding above the outer periphery.

Abstract: An improved locking device for adjustable garment racks including an inner tube slidable in and out from an outer tube. The improved locking device includes a sleeve having a simplified locking tab for engaging and locking the inner tube in a position relative to the outer tube and a touch tab by which an operator may easily and safely manipulate the sleeve to an unlocked position for adjustment of the inner tube relative to the outer tube and again lock the inner/outer tube combination.

Abstract: The erectable, collapsible shelter has a canopy with at least three sides and three corners, a leg assembly, and a perimeter truss linkage assembly having a plurality of perimeter truss pairs of link members connected to the leg assembly. The legs preferably have telescoping upper and lower sections with lower section for engagement with ground, and a slider member slidably mounted to the upper section of each of the legs. A canopy peak support assembly is provided that is movable between a raised position and a lowered position, with the canopy peak support assembly supporting the canopy above the top of the leg assembly in the raised position.