Abstract: A regulating device for gymnastic machines and the like, includes at least a lever (2) for manual selective lock and release, associated with a first member (3), at least a toothed rod (4), associated with a second member (5) slidable relative to said first member (3), and a pawl (6) mechanically interlocked with the lever (2) and selectively engageable in one of the teeth (7) of the toothed rod (4) to block rigidly the second member (5) with respect to the first member (3) in any position by a user the lever (2) being selectively movable from at least a first position of sliding of the second member (5) relative to the first member (3), wherein said pawl (6) can be released from said toothed rod (4), to at least a second position of blocking said second member (5) relative to said first member (3), wherein the pawl (6) is rigidly engaged in one of the teeth (7) of the toothed rod (4), to at least a third position of substantial clearing of the mechanical backlashes between the second member (5) and the first

Abstract: A tow bar includes a towing hitch member including a pintle hitch and secured to a towing vehicle; a towed hitch member secured to a vehicle to the towed; a head member with a lunette ring; a pair of tow bar legs, each including a proximal end including an outer member with a distal end, and a distal end including an inner member with a proximal end telescopingly displaceable within the distal end of the outer member; a leg connector mechanism pivotally connecting the proximal ends of the tow bar legs to the head member; towed connector elements secured to the distal ends of the tow bar legs and structured to releasably connect the tow bar legs to the towed hitch member; and a locking mechanism structured to automatically and releasably lock each of the tow bar legs in either a stored configuration or a deployed configuration.

Abstract: An apparatus for locking an inner telescoping member into a desired position within an outer telescoping member or sleeve. A locking mechanism is carried by the inner telescoping member and includes locking pins supported for motion between respective retracted positions and respective extended positions engaging detents in the outer telescoping member. A synchronizing ring is operatively connected to the locking pins such that synchronizing ring rotation moves the locking pins between the locking pins' respective retracted and extended positions.

Abstract: A telescopic apparatus includes an internal tube telescopically inserted in an external tube. The internal tube includes depressions defined therein. A frame is secured to the external tube. A lever is pivotally connected to the frame. The lever includes a space transversely defined therein, a groove in communication with and in parallel to the space, and a pawl for insertion in a selected one of the depressions for locking the internal tube relative to the external tube. A spring is substantially located in the space. The spring includes a hook for hooking the frame and a bent section located in the groove. A short tube is located in the space and against the spring. A screw is inserted through the frame, the spring and the short tube. A security unit is movably connected to the frame between a locking position against the lever to avoid pivoting of the lever and a releasing position away from the lever to allow pivoting of the lever.

Abstract: A telescopic adjusting mechanism includes: an outer tube having a positioning unit; an inner tube having a hole and displaceable relative to the outer tube along a longitudinal axis; a locking unit displaceable along with the inner tube, and including a locking member movable along a transverse axis between a locking position, where the locking member extends through the hole to engage the positioning unit, and an unlocking position, where the locking member is disengaged from the positioning unit, and a biasing member biasing the locking member to the locking position, the locking unit being formed with an engaging member; a restraining member engaging releasably the engaging member when the locking member is at the unlocking position to prevent the locking unit from hindering retraction of the inner tube into the outer tube; and a drive unit operable to move the locking member from the locking position to the unlocking position.

Abstract: An adjustable surgical retractor system for clamping system to an operating table. The clamping mechanism includes an upper jaw, lower jaw, a drive member, an adjustable frame support post and releasable locking mechanism for adjusting the height of the surgical retracting frame. The releasable locking mechanism can be a mechanism that includes a sleeve in close sliding relationship to the upper portion of lower jaw member. The upper portion of the lower jaw has a plurality of sockets for receipt of a plurality of balls. The sleeve can have a first position which positions an internal shoulder in alignment with the sockets and urges the balls into engagement with circumferential grooves in post member to lock the post at desired height. In a second position, an internal groove in the sleeve can align with the sockets to allow the balls to move partially out of the sockets and out of engagement with the groove in the post so that the post can be longitudinally adjusted relative to the clamping mechanism.

Abstract: An adjustable height seat post for bicycles that comprises an inner tube slidably contained within an outer tube which supports a bicycle seat. The outer tube clamps into a bicycle frame and contains a spring which acts to force the inner tube upward. The inner tube is allowed longitudinal movement within the fixed outer tube via a locking mechanism that forces ball bearings into pockets or channels on the inner tube. The locking mechanism can be remotely activated with a handlebar mounted lever or manually with a seat post mounted lever.

Abstract: An ice house including a collapsible frame assembly. The collapsible frame assembly includes at least one first pole with a connecting end having a plunger assembly. At least one second pole has a hollow end sized to telescopically engage with the plunger assembly and the first pole. The second pole has at least one detent proximate a connecting end sized to releasably engage with a plunger on the plunger assembly. An actuator assembly includes a first end secured to the connecting end of the second pole and a second end adapted to telescopically receive the plunger assembly and the first pole. The actuator assembly includes an actuator located over the detent and configured to flex between a relaxed position and a depressed position that disengages the plunger from the detent. A seat assembly is secured to the frame assembly and a cover having at least one door is attached to the frame assembly.

Abstract: An apparatus for adjusting the length of a tension tie mounted on a deployable antenna based on a cable network structure includes a cable retainer provided with a retaining hole, a cable being connected to the cable retainer; a retaining case coupled to the outer periphery of the cable retainer and provided with a plurality of retaining holes; and a retainer positioned inside the cable retainer and configured to extend through the retaining hole of the cable retainer and through one of the retaining holes of the retaining case so that the cable retainer and the retaining case are prevented from moving in the longitudinal direction.

Abstract: A clamp adapted to clamp a bar, particularly supporting components such as guides of conveyors of articles. The clamp includes: a clamp body, adapted to accommodate the support bar for supporting the components, with the possibility of adjusting the relative position of the bar with respect to the clamp by longitudinally sliding the bar; positioning means arranged to have a first working position in which the positioning means are elastically urged in abutment against the bar to engage at least positioning notch, provided on the bar, upon reaching a predetermined position, so as to essentially prevent a further longitudinal sliding of the bar once said predetermined position is reached. The clamp further includes tightening means, distinct from said positioning means and adapted in use to hold the bar in position against displacements with respect to the clamp body.

Abstract: A mast arrangement having two elongate individual masts. The first elongate individual mast comprises a hollow connector comprising an inner diameter. The second elongate individual mast comprises a protruding connector end. The protruding connector end telescopically engages with the hollow connector end. The mast arrangement also comprises a pin and slot arrangement and collars to connect the masts together and minimize unwanted disengagement of the masts from each other.

Abstract: An extension device includes the first tubular member, the second tubular member movably inserted into the first tubular member, and the third tubular member movably inserted into the second tubular member and a regulating device that regulates movement of the third tubular member with respect to the second tubular member. The regulating device includes a regulating member protruding from the inner hole portion to the outside of the third tubular member band is brought in the outer hole portion, and a pressing member for pressing the regulating member in the protruding direction.

Abstract: The present invention concerns an apparatus for releasably locking two rail elements (10, 11), which are supported displaceably relative to each other, of a telescopic rail or a linear guide and for adjusting the motivity to be applied for the displacement, comprising a housing (1) which is fastened to a first one of the rail elements (11) which are supported displaceably relative to each other, at least one locking element (5) and at least one locking force spring (4) which is supported against the housing and biases the locking element (5) against the second of the rail elements (10) which are supported displaceably relative to each other, at least one friction element (7) and at least one friction force spring (6) which is supported against the housing and which presses the friction element (7) in biased relationship against the second of the rail elements (10) which are supported displaceably relative to each other.

Abstract: An adjustment mechanism is provided. The adjustment mechanism has a housing, a clearance portion, first and second pin members telescopically received within the housing, a telescopic engagement mechanism mounted in the clearance portion and adapted to telescopically move the pin members, and a locking mechanism adapted to lock the pin members in a rigid position. A locking adjustment assembly is also provided.

Abstract: A lineman's pole having telescoping sections is connected by a push button assembly for temporarily fixing the length of the pole by holding sections together. The push button assembly is accessible from an end of the pole and can be installed, removed, and positioned via a connector accessible from one open end of the pole. A tool engages the connector on the push button, allowing for pulling, pushing, and rotating the button into a desired position. One connector includes a threading. A threaded tool engages the threads, allowing the user to pull the push button out of the telescoping pole. The connector, such as the threads within a bore in an adapter holding the push button, allows for removing the push button assembly. The push button assembly connects and releases cylindrical sections of the telescoping lineman's pole via openings in the surface of the telescoping sections.

Abstract: A portable support structure including a platform member having a primary platform connector and a secondary platform connector. The primary platform connector is configured to receive a primary support connector. The secondary platform connector is configured to receive a secondary support connector. The support structure also includes a primary support member including the primary support connector and a hook member. In addition, the support structure includes a secondary support member having a first end and a second end. The first end is detachably engaged with the secondary platform connector and the second end is in locking engagement with the hook member. The primary support connector includes structures that engage the primary platform connector and rotationally position the primary support member. The hook member includes a hook portion that engages and prevents the secondary support member disengaging upon a rotation of the secondary support member.

Abstract: A disconnectable link may include a first link member having a generally tubular portion, a first ball joint disposed on the first link member and adapted to engage a first suspension member; a second link member slidably receivable within the first link member; a second ball joint disposed on the second link member and adapted to engage a second suspension member; a lock shaft engaged with the second link member; and a lock element disposed within an aperture in the second link member. Movement of the lock shaft into a first position may cause the lock element to engage the first link member to prevent relative axial movement between the first and second link members, and movement of the lock shaft into a second position may cause the lock element to disengage the first link member to allow relative axial movement between the first and second link members.

Abstract: A tool includes a working tool portion and an extendable handle joined with the working tool portion. The extendable handle includes a shaft, a tube, and an anti-rotation member that is unbiased so as to prevent, during application of relative rotational force between the shaft and tube, relative rotation between the shaft and tube and to prevent removal of a portion of the anti-rotation member from an axially arranged groove. A lock device is movable from a first position to a second position wherein when the lock device is in the first position the tube is prevented from moving axially relative to the shaft and wherein when the lock device is in the second position the tube can be moved axially relative to the shaft.

Abstract: The present invention discloses a sliding device used on the supporting shaft, which utilizes the button to achieve singlehanded operation, utilizes horizontal slide of the bolt to achieve the steady locking of tiny clearance, and utilizes the active connection with relative turn and relative slide between the sliding base and the button to achieve transmission between the pressing of users and the horizontal slide of the bolt.

Abstract: Embodiments relating to a telescoping pole system are provided. Such a telescoping pole system may be adjusted by user manipulation to vary a length of the telescoping pole system.

Abstract: An apparatus for locking an inner telescoping member into a desired position within an outer telescoping member or sleeve. A locking mechanism is carried by the inner telescoping member and includes locking pins supported for motion between respective retracted positions and respective extended positions engaging detents in the outer telescoping member. A synchronizing ring is operatively connected to the locking pins such that synchronizing ring rotation moves the locking pins between the locking pins' respective retracted and extended positions.

Abstract: A quick attachment apparatus for use in association with orthopedic instrumentation and/or tools for releasable connection to a device, including a coupling member defining a passage extending generally along a longitudinal axis and sized to slidably receive a connection portion of the device, a locking member transitionable between a locked position and an unlocked position, a biasing member engaged between the coupling member and the locking member to bias the locking member into engagement against the connection portion to substantially prevent relative axial movement between the coupling member and the connection portion, and wherein application of a lateral force onto the locking member results in displacement of the coupling member generally along a transverse axis wherein the locking member is disengaged from the connection portion to allow relative axial movement between the coupling member and the connection portion.

Abstract: An adjustment mechanism for an appendage elevation system, the adjustment mechanism comprising a housing, a clearance portion, first and second pin members telescopically received within the housing, a telescopic engagement mechanism mounted in the clearance portion and adapted to telescopically move the pin members, and a locking mechanism adapted to lock the pin members in a rigid position. One embodiment of the locking mechanism includes segments in the housing which restrict movement of the telescopic engagement mechanism. An alternative embodiment of the locking mechanism includes a spring button attached to a pin member which engages an aperture in the housing to restrict movement or the telescopic engagement mechanism. A further alternative embodiment of the locking mechanism includes a sleeve which engages the telescopic engagement mechanism to restrict movement. An appendage elevation system and a method for use of the adjustment mechanism are also disclosed.

Abstract: A system to couple a plastic part and a body structure includes a plate and an elastic member as part of the body structure. Additionally, the plastic part includes an opening and an oblique stop at an end of the opening. The plate is received within the opening. The elastic member includes a first end that is free and a second end that is fixed to the plate. The elastic member biases the plate with respect to the plastic part. In a first position, the first end of the elastic member contacts the oblique stop. In a second position, the first end of the elastic member contacts the oblique stop such that the first end of the elastic member is displaced in a vertical direction and a horizontal direction compared to the first position. Additionally, the elastic member is slideable along the oblique stop.

Abstract: A device (10) for fixing a pulley (40) includes a rotating pin (12) on the outer surface of which the pulley (40) may be fixed. The rotating pin (12) has at least one locking element (50) movable between a first locking position where it retains the pulley (40) and a second releasing position where it does not retain it. The locking element (50) is coupled with at least one element (60) which can be operated by the user so that the displacement of said at least one element (60) which can be operated by the user causes the displacement of the at least one locking element (50) between the first and second position.

Abstract: A tool having a telescoping handle including a main shank and an outer sleeve complementary shaped to receive the main shank therein. A guide groove is formed in an outer circumferential surface of the main shank for receiving a guide pin formed or attached to an inner circumferential surface of the outer sleeve. A locking collar may be provided to cause a bearing member to selectively engage locking structures formed on the main shank in order to selectively lock the telescoping handle in selected positions. The bearing member may also serve as the guide pin. Alternatively, at least two distinct locking and release mechanisms may be provided to selectively lock the telescoping handle in selected positions.

Abstract: A collapsible shelter of the type having a canopy and a frame, the frame having mounting members with a stabilizer reduced friction pivot shafts and an adjustable locking member having a spring providing for easy adjustment of the height and breadth of the canopy.

Abstract: A latching assembly for attaching an accessory such as a canopy to a wagon or other children's vehicle. Body tubes are positioned within each corner of the wagon and each features an exposed annular notch. The body tubes are engaged by latches attached to the four corner poles of the canopy. Each latch includes a housing within which pivoting latch fingers reside. Each latch finger includes button and jaw portions as well as leaf springs that urge the jaw portions into engagement with the annular notch of a corresponding body tube. A latch may be removed from the body tube by squeezing the button portions of the latch fingers together. This procedure is repeated for the remaining three corners of the wagon so that the canopy may be removed there from.

Abstract: A connecting device includes an inner component (100) and an outer component (200). The inner component is dimensioned to be at least partially received in the outer component, with a pair of surfaces (102A, 102B) of the inner component facing a pair of corresponding surfaces (202A, 202B) of the outer component. At least some of the surfaces include interengageable formations (106, 108, 206, 208). The device further includes an arrangement (104) for allowing relative movement between at least one of the surfaces of the inner component and the corresponding surface of the outer component to allow for engagement and/or disengagement of the formations.

Abstract: A bicycle saddle height adjustment apparatus that is mounted on the frame of a bicycle, for adjusting the height of a bicycle saddle. The bicycle saddle comprises a seat post that supports a bicycle saddle and is adapted to fit telescopically within the seat tube of a bicycle frame; a height adjustment mechanism mounted on the seat tube of a bicycle, for adjusting the saddle height; and a spring connected between the seat post and the height adjustment mechanism. Actuating the height adjustment mechanism enables a cyclist to safely and quickly adjust the height of a bicycle saddle while continuously operating said bicycle.

Abstract: Elements, couplers, systems, and methods for joining two or more trough members. A locking element for a coupler of a cable trough system includes a member including a first member end configured to be coupled to the coupler, and a second member end. The locking element also includes a locking member including a first portion slidingly coupled to the second member end of the member, and a second portion extending to a point, and a handle member defining a bottom surface and being pivotally coupled to the second member end of the member, the handle member pivoting between locked and unlocked positions. As the handle member is pivoted from the unlocked to the locked position, the bottom surface moves the locking member along the member so that the point of the locking member extends into a spacing formed by the coupler.

Abstract: A screwless fixing assembly disposed on a frame is provided, which includes a fixed member, a movable member, an elastic member, and a positioning device. The fixed member is fixed on the frame and has an opening form thereon. The movable member is movably disposed to the fixed member and has a pin to pass through a through hole of the frame. The elastic member is provided for pushing the movable member to move away from the frame. The positioning device is disposed on the movable member and protrudes on the fixed member through the opening, for being selectively engaged with the fixed member at a first position and a second position, so as to move the pin to leave or inserted into the through hole. An electronic device is fixed on the other side of the frame by the pin passing through the through hole.

Abstract: A telescopic adjusting mechanism includes: an outer tube having a positioning unit; an inner tube having a hole and displaceable relative to the outer tube along a longitudinal axis; a locking unit displaceable along with the inner tube, and including a locking member movable along a transverse axis between a locking position, where the locking member extends through the hole to engage the positioning unit, and an unlocking position, where the locking member is disengaged from the positioning unit, and a biasing member biasing the locking member to the locking position, the locking unit being formed with an engaging member; a restraining member engaging releasably the engaging member when the locking member is at the unlocking position to prevent the locking unit from hindering retraction of the inner tube into the outer tube; and a drive unit operable to move the locking member from the locking position to the unlocking position.

Abstract: A painting tool assembly includes an elongated pole having a first end and a second end. The elongated pole has a length greater than three feet. A roller mounting releasably couples to a paint roller. The paint roller is rotatable along a longitudinal axis of the paint roller. The roller mounting receives and is removably coupled to the first end of the pole. A locking member is mounted on the pole and releasably locks the pole to the roller mounting.

Abstract: A hand tool includes a first part including a head and a shank which is cooperated with a second part. A positioning hole and a receiving hole are defined in the shank and located on two parallel axes of the shank. A block is received in the positioning hole and a positioning unit is received in the receiving hole. The second part is movably mounted to the shank and has a longitudinal slot with which the block is movably engaged. Two positioning notches are defined in the second part and the bead of the positioning unit is removably engaged with one of the positioning notches. A first recess, a second recess and a third recess are defined in communication with the slot so as to receive the block during adjusting the length of the handle of the hand tool.

Abstract: The invention is for a handle assembly for an adjustable crutch having two upper tubes each of which slides inside one of two lower tubes to adjust the height of the crutch. The handle assembly has a body, a lever attached to the outside of the body; and two locking pins positioned inside the body. Each locking pin is mechanically coupled to the lever and each locking pin is normally biased through tube holes formed in the upper tubes and through tube openings defined in the lower tubes to prevent the sliding of the upper tubes inside the lower tubes. The depression of the lever causes the locking pins to retract from the tube holes and the tube openings such that a user may slide the upper tube inside the lower tube to change the crutch height.

Abstract: A coupling spring pin is provided for use in hollow sections or tubes. The coupling spring pin comprises a base spring element and a bolt connected to the spring element. The spring element is provided with a flange and at least two bent spring tongues. The bolt stands perpendicularly on the flange and the two bent spring tongues extend downwards from the flange. The bolt may be provided with a bolt case in order to securely prevent shearing. The bolt case, in its lower region, may be provided with an annular groove and the bolt case may be peripherally (injection) molded on the base in an injection molding tool, so that the plastic material of the flange may fill out the annular groove, which allows the bolt case to be connected to the spring element in an undetachable and stable manner.

Abstract: A hurdle has contiguous trigger tubes along the telescoping tubes. A trigger mechanism inside each trigger tube is used to adjust the height of the hurdle. The trigger mechanism contains a pivoting vertical rod with an inwardly directed perpendicular upper end that extends out of the hole in the trigger tube to form a button and an outwardly directed perpendicular pin at its lower end that engages one of the holes in the upright. The vertical rod has a horizontal pivot bar attached midway along its outward surface. The lower end of the vertical rod is connected to a spring compressed within the trigger tube that forces the pin inwardly and that is further compressed when the button is pushed to release the pin.

Abstract: A spring operated button assembly for use with telescoping thick-walled tubes or adjacent planar surfaces wherein the entire spring assembly may be contained within a pocket to allow movement of surfaces past the spring button assembly without interference.

Abstract: A hand tool includes a first part including a head and a shank. Three first holes are defined in the shank and each receive a first stop and a first spring therein. A second hole is defined in shank and located at an axis different from an axis of the first holes, a second stop and a second spring are received in the second hole. A second part is movably mounted to the shank and includes a positioning hole with which one of the first stop is removably engaged. The second stop is slidably engaged with a groove in the second part. A third part is mounted to the second part and includes button which is pushed to remove the first stop from the position hole so that the second part and the third part can be moved relative to the shank.

Abstract: A collapsible shelter of the type having a canopy and a frame, the frame having mounting members with a stabilizer, reduced friction pivot shafts and an adjustable locking member having a spring providing for easy adjustment of the height and breadth of the canopy.

Abstract: By providing a hand holdable, reusable, holding system which enables users to insert any small diameter, shaft supporting pyrotechnic device, such as a sparkler, into an aperture and be assured that the shaft of the pyrotechnic device is securely locked to the holding system for protecting the individual from harm, an easily constructed, easily used holding system is attained which is capable of enabling any elongated, small diameter wire or shaft to be quickly inserted into the holding system and securely lockingly engaged therewith. In this way, the pyrotechnic material which is adhered to the upper portion of the elongated shaft or wire is easily held by the user in a safe and effective manner.

Abstract: An ankle clamp assembly for an inversion table has a stationary frame, an adjustable frame and an operating device. The stationary frame has a longitudinal beam and a transverse beam. The longitudinal beam is connected to the inversion table and has a recess, a latch rod and a mounting arm. The mounting arm is connected to the longitudinal beam and has a stationary latch hole. The adjustable frame is movably connected to the stationary frame and has an adjusting arm and a pressing arm. The adjusting arm extends through the mounting arm and has multiple elongated latch holes. The operating device is connected to the stationary frame, engages the adjustable frame and has a spring, a handle and a latch lever. The latch lever is attached transversely to the handle, extends through the recess into an elongated latch hole corresponding to the stationary latch hole.

Abstract: A locking pin assembly includes a button that can be moved in a first direction from a first position to a second position, and a first biasing member for biasing the button to be normally in the first position. The locking pin assembly also includes a locking pin member that engages the button and is movable in a second direction, which is substantially perpendicular to the first direction, from a third position to a fourth position when the button is moved from the first position to the second position. The locking pin assembly also includes a second biasing member for biasing the locking pin member to be normally in the third position. The locking pin assembly can be used in a collapsible canopy frame to adjust the height of a telescoping side pole by fixing upper and lower sections to each other and/or to fix the edge scissor assemblies and the side poles in an opened position.

Abstract: Couplers for a cable trough system including a spacing defined by first and second guiding surfaces, the spacing being sized to receive the terminal end of a trough member into the spacing. One or more springs are carried on the couplers and may be at least partially disposed within the spacing between the first and the second guiding surfaces. The springs urge the terminal end of the trough member against the coupler upon insertion of the terminal end into the spacing. One or more locking elements are coupled adjacent to the springs to move between a locking position and a released position. The locking elements may slide longitudinally or move perpendicularly to the couplers. A first trough member may be released from the couplers independent from a second trough member coupled to the couplers. Methods for use of the couplers are also provided.

Abstract: A lightweight fence or gate pole is provided having a lock assembly including a base attached to the lightweight pole, a support member extending from the base, a connector extending from the support member, the connector having a snap button connected thereto and a screw attached to the connector. The lock assembly has a locked position when a screw head is adjacent to an outer surface of the lightweight pole and the lock assembly has an unlocked position wherein the screw head is farther away from the outer surface of the lightweight pole than in the locked position.

Abstract: A telescopically adjustable pipe includes an outer tube, an inner tube, an inner bushing, a sleeve, a push member, a mounting bracket, a positioning member, and a retaining member. Thus, the positioning member is moved by movement of the push member and is detachably locked in the respective positioning hole of the inner tube to lock the inner tube in the outer tube, so that the inner tube is locked in and cannot slip from the outer tube.

Abstract: A draw spring linkage includes a hollow rod formed with a shoulder structure at the first end of the rod and with a slot that extends longitudinally of the rod and is located between the shoulder structure and the second end of the hollow rod. A tongue member includes an attachment portion and a stem that projects from the attachment portion. The stem fits slidingly in the interior space of the hollow rod and is formed with a slot that is aligned with the slot in the hollow rod. A key extends through the slot in the tongue member and the slot in the hollow rod and projects laterally from the hollow rod. A hollow cylindrical spring is threaded by the hollow rod. The first end of the spring engages the shoulder structure, the second end of the spring engages the key, and the spring is held under compression between the shoulder structure and the key.

Abstract: Device for locking two elongated elements the first of which slides in the second telescopically, comprises members for locking in the longitudinal direction the first element relative to the second element, which include a lock washer arranged around the first element and whereof a circumferential portion is placed between two longitudinally opposite supports of the second element and an elastic return member placed between the second element and the washer and acting on the washer in a point distant from said supports so as to bring the lock washer into an extreme inclined position relative to the first element wherein the two opposite parts of said washer are in contact with the first element so as to lock the first element relative to the second element in the longitudinal direction.

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 first 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.