Abstract: A walker that avoids any pressure on the injured foot while allowing the person to walk on its own, which is accomplished by providing a limb support at knee height, made of a strong canvas material, coupled with the stability of a four legged frame made of a light weight material, together encompassing this mobilization devise which provides the foot injured or operated person an instrument to move about without having to lean the injured foot on the floor, being easy to maneuver, and additionally provided with convenient height adjustment and easy folding/unfolding capabilities.

Abstract: A walker for both child and adult users includes two supporting units and a connecting unit transversely connecting the two supporting units at the front sides thereof. A horizontal rod is provided between two leg portions of each said supporting unit. Each said horizontal rod has two slots at the opposite ends. Two sliding joints are mounted on the supporting units in the manner that the ends of the horizontal rod can be received by the sliding joints, and two pin members can be respectively pierced through one of the sliding joints and the corresponding slot. Further, two sets of clutch members each having a toothed portion for being detachably engaged with each other are provided between the ends of the telescopic members of the connecting unit and the adjacent supporting units.

Abstract: A walker comprises: a cross brace having an end sleeve on each end, N-shaped leg extensions, a lock body having a housing and a block having an axis hole, wherein the leg extension is covered by the end sleeve, the lock body is provided on top of the end sleeve, the leg extension and the lock body are provided with a pin hole and a connecting pin hole respectively at corresponding positions and fixed by a lock pin, the housing of the lock body is provided with a hole for sub axis, the block is connected inside the housing by a sub axis passing through the hole for sub axis and the axis hole, the end sleeve is provided with an orientation hole, a flange for fitting with the orientation hole is provided at the bottom of the block in the housing, a stretch part with a bearing rod is provided inside the leg extension, and the bearing rod leans against the upper portion of the block above the axis hole by passing through a through hole on the leg extension.

Abstract: An ergonomic collapsible crutch for providing assistance with ambulatory movement of a user, the crutch including a supporting member having an underarm support surface and a hand grip portion, a gripping pad disposed remotely from the underarm support surface generally along a vertical axis and connected to the supporting member to provide stability and grip on surfaces of a walking environment, and a hand grip attached to the hand grip portion of the supporting member so that the handgrip extends from the supporting member at an angle from the vertical axis ranging from about 85° to about 60° and from about 95° to about 120°. The ergonomic collapsible crutch may also include a shock absorbing device and buttons for adjusting the height of the crutch as well as the position of the hand grip. The hand grip may also be ergonomically contoured for improved use by a user.

Abstract: A foldable walker in one embodiment includes right and left side frames, a front frame, and a seat including two U-shaped seat frame members pivotably connected together and each including a toothed member along a lower portion at either end, two side links each having one end pivotably secured to the front frame and the other end pivotably secured to the seat pivot, and a canopy mounted on the seat. Lifting a middle of the seat and continuously pushing one seat frame member toward the front frame will fold one seat frame member downward toward the other seat frame member, counterclockwise pivot one ends of the links relative to the front frame, pivot the other ends of the links about the seat pivots, and fold the seat with the front frame by engaging the toothed members of one seat frame member with that of the other seat frame member.

Abstract: A walker is disclosed having two sets of handles positioned for rising from and lowering to a seated position in addition to serving as a walking aid. The walker comprises a frame having a front section comprising a pair of front vertical supports and a rigid cross-piece, and two side sections each comprising a rear vertical support having a load-bearing axis formed through a ground-engaging point, rigid connectors connecting the side sections to the front section, a first pair of handles positioned to support a user in a standing or walking position, and a second pair of handles positioned below and to the rear of the first set of handles to support a user in rising from or lowering to a seated position, in which the geometric centers of each of the second pair of handles is positioned to the rear of the load-bearing axis of each of the rear vertical supports.

Abstract: A walker is made adjustable for various sizes of persons, including grossly obese persons. The walker includes two side support members, each of which has a front leg, a back leg, and a cross leg connecting the two legs. A braced sleeve assembly is positioned on the front leg of each side support member. The braced sleeve assembly has an elongated first sleeve dimensioned to slide over the front leg, an elongated second sleeve extending horizontally and inwardly from the elongated first sleeve, and a support brace extending at an angle from one sleeve to the other sleeve. The second sleeve has a set of spaced positioning holes. A releasable latch is mounted to the elongated first sleeve. The walker further includes a cross bar dimensioned to slide inside the second sleeves of the braced sleeve assemblies.

Abstract: A crutch enabled to fold on itself so the crutch can be stored in small places or confined areas. The crutch attaches to the forearm of a user with a flexible cuff during use. After use, an upper section and lower section of the crutch rotate toward one another using a pivoting joint. Further, the lower section of the crutch has telescoping sections, allowing the crutch to use substantially less space during storage.

Abstract: A stair-adjustable crutch characterized by an adjusting cuff having a cone with an elongated or extended, flared and offset lip and lip receptacle provided in the crutch foot to facilitate selective angular adjustment of the crutch foot and frame from an aligned configuration. This adjustment is effected by manipulation of a rod fitted with a pair of spaced-apart, wishbone-shaped legs extending into the cone, which legs are provided with shaped tabs or locks for selectively entering and exiting spaced-apart sets of vertical and angled slots in the cone of the adjusting cuff. Up and down movement of the adjusting rod facilitates both selective conventional operation of the crutch with the crutch foot in linear alignment, and angling of the crutch frame and upper crutch foot at the adjusting cuff with respect to the crutch foot below the adjusting cuff, to adjust the user's weight and more safely ascend and descend steps and stairs.

Abstract: An ambulation assistance device is provided with a leg support that releasably secures to an individual's leg and supports the leg in a positively flexed position. An elongated pylon extends downwardly from the leg support and may be hinged at the point of connection to simulate the mechanics of the individual's knee during ambulation. A resilient rearward brace may be used to bias the pylon toward a standing position. A forward brace may be provided to limit over extension of the pylon. A foot member may be pivotably coupled with the distal end of the pylon to simulate the mechanics of the individual's ankle during ambulation. A resilient brace may bias the foot member toward a standing position.

Abstract: A walker includes a frame and two frame supports. The frame supports provide arms and legs and are coupled to the frame to support the arms in elevated positions above ground underlying the frame.

Abstract: A cane having a substantially vertical member, a base attached to the substantially vertical member with at least three legs and a first tread proximate the substantially vertical member, a second tread moveably connected to the first tread, the second tread having at least one leg and being moveable from a retracted position to an extended position. A cane having a handle means for carrying the cane and for steadying a user of the cane, a platform means for stepping upon by the user, the platform means secured to the handle means and an extension means for retractably extending the platform means. A method of climbing a vertical rise that includes positioning, at a bottom of a vertical rise, a cane having an extendable platform, extending the platform, stepping upon the platform, stepping off the platform onto a surface higher than the bottom of the vertical rise; and retracting the platform.

Abstract: A mobility aiding device, such as a walker, a wheelchair, a transport chair, a shower seat or a rollator, are used in providing support to injured or ailing persons during activity or movement. A solid two-piece seating platform is provided with a structural support for distributing the weight of the user to the frame. Furthermore, the two pieces of the seating platform are inter-hinged, enabling the entire device to fold up into a storage position. A lock is provided for maintaining the structural support in place, and a handle is provided for facilitating folding the device into the storage position.

Abstract: An ergonomic collapsible crutch that may have a shock absorbing device, used to facilitate walking. The crutch has only one supporting member in place of two. The supporting member is ergonomically designed. The hand grip is configured to reduce stress on a patient. The crutch has a length adjustment and a collapsibility feature.

Abstract: The present invention relates to an ordinary crutch modified with a straight support which may be formed from a solid, lightweight tubular member, said support connected at one end to near the bottom portion of the crutch and with a bicycle pedal-like cushion on the other end for which the calf, shin or cast of the injured leg or leg of the injured foot rests. Since the pedal can freely revolve from its attachment to the solid support member, the angle at which the leg rests on the pedal relative to the crutch may be readily optimized for the patient's comfort in order to relieve pain and discomfort. Also, fatigue from the body when supporting the dangling leg may be avoided as the leg no longer dangles with its concomitant “dead weight”, because the entire weight of the leg is resting on the cushion of the leg support, the knee is flexed or extended while standing, or while sifting.

Abstract: A foldable stick assembly includes a foldable tube unit, a sliding handle, a push rod unit, a ratchet socket, an upper ratchet, a pawl member, a lower ratchet, and a push block. The foldable tube unit includes a handle, an upper mounting tube, a lower mounting tube, an upper pivot sleeve, and a lower pivot sleeve. The push rod unit includes a main push rod and an upper push rod. Thus, the foldable stick assembly may be used to cut and remove the weeds and to loosen the soil. In addition, the foldable stick assembly is folded easily and conveniently, so that the volume of the foldable stick assembly is reduced, thereby facilitating storage and transportation of the foldable stick assembly, and thereby decreasing the cost of assembly.

Abstract: A locking assembly is disclosed for use with a walker having foldable side members. The locking assembly includes a locking pin movable between a first position in which the corresponding side member is held in a locked, unfolded state and a second position in which the side member is in an unlocked, folded state. A lock plate extends transversely to the longitudinal axis of the corresponding side member, and includes an aperture adapted to receive a locking end of the locking pin when the pin is in its first position. A lever is coupled to the locking pin such that when the lever is pivoted by upwardly applied pressure, the locking pin is moved from its first position to its second position to permit rotation of the corresponding side member to its folded state.

Abstract: A collapsible knee crutch including an upper leg member, a lower leg member, a lower leg pivot pivotally attaching the upper and lower leg members together for allowing the lower leg member to pivot between a bent position and an extended position, a support leg member, and a support leg pivot for pivotally attaching the lower leg member and the support leg member together for allowing the support leg to pivot between a bent position and an extended position. The lower leg pivot has a pivotal axis located forward of the user's natural knee pivotal axis when the crutch is attached to the user's leg. The support leg member has elongated, spaced apart inside and outside support legs with the outside support leg being longer than the inside support leg.

Abstract: A foldable walker includes first and second side frames, each frame having a front leg, rear leg, and an arm connecting the front leg and rear leg. A detent is urged by a spring or spring clip resiliently into engagement with a sleeve and a front leg. The sleeve surrounds a portion of the front leg and allows rotation and displacement of the leg relative to the first sleeve when the detent is disengaged. Alternately, a recess on the sleeve engages a pin, thereby preventing rotation of the leg relative to the sleeve. The detent is disengaged by a cable, or the pin is disengaged from the recess by depressing a lateral arm that is fixed to the sleeve.

Abstract: A foldable walker having a paddle shaped lever arranged to interact with locking pins by lateral movement in either direction. In a particular embodiment, the walker has at least two locking positions wherein the walker can hyper-extend, spreading out and locking to a more fully opened configuration, allowing the walker to be pulled closer to the patient making it easier for the patient to lift himself or herself up to a standing position.

Abstract: A wheeled walker convertible to a transport chair. The walker has a strap-type backrest that is pivotally attached to the upper end of the handlebars. The backrest can be placed in a forward position when the apparatus is used as a walker and the user wishes to rest in a rearward facing sitting position and in a rearward position when the apparatus is used as a transport chair and the user sits in a forward facing position and is propelled by a care-giver. A novel braking system locates the brake actuating linkage inside the leg and handlebar members and provides accommodates extension height adjustment of the handlebars. A brake lever system providing a linear pull non-cable brake actuation is also disclosed.

Abstract: A convertible cane assembly comprises a pair of canes which can be used separately by a cane user. The canes include connections for securing the canes in side-by-side relation to provide a single cane which can be used in a normal manner. An important feature of the connections is the ability to easily separate the canes. In the single cane version, loads are preferably transferred through the entire length of both canes, meaning that the connections do not have to carry substantial loads.

Abstract: An automatic bending-angle changing structure for an umbrella including an upper and a lower sleeve, a pulley holding rod, a pulley set, a turning cylinder, a turner bracket, a hinge set and a reel, wherein: the pulley set is pin connected with the pulley holding rod which then is extended into the upper sleeve, the turning cylinder is fitted in the upper sleeve; the lower end of the pulley holding rod is slipped thereover with the turning cylinder and is pin connected with the upper end of the hinge set, the lower end of the hinge set is pin connected with the turning cylinder and the turner bracket, thereby a linkage is formed; the lower end of the turner bracket is slipped into the lower sleeve having thereon the reel; a fine rope is wound on the pulley set by means of the reel to move the turning cylinder and the turner bracket, thereby the umbrella can have variation in opening, collapsing and bending.

Abstract: A detachable knee or lower leg support system for crutches which reduces the walking and standing effort when one lower leg or foot has to be protected from weightbearing. The system comprises 1. a cushioned support which can be fixed as required to a crutch by one or several clamp elements and 2. a rest element which should be used in elbow or forearm crutches for greater safety. The rest element is not required in axillary crutches. It pushes against the thigh or lower torso of the user and provides additional stability by securing a parallel alignment of crutch and thigh.

Abstract: The invention relates to a rollator which tubular frame assembly comprising a pair of U-shaped side frames connected by a front brace. The side frames also have a cross bar that extends between the front legs and the back legs of the frame. The side frames are pivotably attached to the front brace so that the side frames can fold inward. Further, the rollator has a molded rigid seat that is mounted on pivot brackets to allow it to pivot upward out of the way of the user. The pivot brackets have an offset axis of rotation so that the seat nestles in a curved area of the front brace.

Abstract: A walking cane having a multifunctional handle, where the handle, which outwardly appears to be a conventional handle, is comprised of articulating elements which can be rotated outwardly, therein transforming the handle into a tripod like structure. The cane then becomes self-standing when inverted. Magnets are used to hold the articulating elements in position in the unified form, and the proximity of these magnets may have some therapeutic value.

Abstract: A hunting blind formed of a flat base panel having opposed first and second creases forming a first side panel and a second side panel, each of the side panels being foldable to first positions to lie parallel to the base panel or to second positions to extend at angles to the base panel, opposed surfaces of the panels having a camouflaged pattern thereon.

Abstract: An orthopedic walker having a rear crossbar which is pivotally mounted to two side frames allowing for sequential movement of one side frame forward relative to the other to facilitate walking. A pair of wrist guards are positioned at the top of each frame and the frames provide a smooth transitioning of a number of handholds to aid in standing from a seated position. A pair of climbing members are also positioned on ribs along a left side frame and a right side frame.

Abstract: A double-story umbrella includes an upper umbrella, and a lower umbrella detachably coupled with the upper umbrella and operatively opened to be a beach umbrella or a big umbrella having large shielding area; whereby upon uncoupling of the upper and lower umbrellas, each umbrella can be folded to have a short folding length for a convenient handling and storage when the umbrella is folded.

Abstract: An assistive device for persons with an injured or disabled leg includes a main body comprising a crutch to which is pivotally attached a supporting structure. To assist the person in walking, the device can be used as crutch in the known manner, and the supporting structure is maintained in the same plane as the crutch. When the person wishes to be seated, one end of the device is placed on the seat adjacent the person and the supporting structure of the device is pivoted out of the plane of the crutch to provide a support for the opposite end.

Abstract: A tilt device for a sunshade comprises an upper sleeve having an upper end securely connected to an upper end of an upper support tube of a sunshade and a lower sleeve having a lower end securely connected to a lower end of a lower support tube of the sunshade. A lower end of the upper sleeve comprises several positioning grooves. The lower end of the upper sleeve is pivotally connected to the upper end of the lower sleeve. A push member is biased to selectively engage with one of the positioning grooves of the upper sleeve. The push member moves downward and inward when it is pushed inward.

Abstract: An article connector including an insertion seat having an insertion hole, an opening and a plurality of installation holes; an connection seat mounted with a mounting shaft to combine with the opening of the insertion seat, and having an engaging slot; and two shaft bodies, one of the shaft bodies being provided with a plurality of screw holes, and the engaging slot being engaged with a mounting hole provided at one side of the shaft bodies, thereby the two shaft bodies are formed into a structure by the insertion seat and the connection seat. The two shaft bodies require no screw or does not require a welding process to form into a connector. Thus, these parts can be dismantled and assembled rapidly, and stored in a limited storage space.

Abstract: The walking aid includes a stick body inclined in the forward-and-backward direction so that the lower end thereof is positioned forward, a support rod installed behind the stick body and inclined so that lower end thereof is positioned backward, and wheels provided on both sides of the lower end of the stick body and on both sides of the lower end of the support rod, steering being carried out by turning the stick body, wherein a rocking mechanism is provided at the wheel installation portion of the stick body to support an axle rotatably with respect to its axis in the forward-and-backward direction. With this kind of structure, even when the stick body is tilted or steered, the axle rocks automatically so that the wheels on both sides remain contact with the ground at all times, whereby it is possible to obtain a stable, easy-to-use walking aid.

Abstract: A convertible cane construction 10 including a pair of cane members 20, 20 connected to one another by a pair of collapsible arm members 30, 30′. Each collapsible arm member 30, 30′ is movable between a fully extended mode which widely separates the cane members 20 and a fully collapsed mode which joins the pair of cane members 20, 20 into a quasi-single cane configuration. Each collapsible arm member 30, 30′ includes a pair of lever arms 31, 32 pivotally connected to one another on one end and pivotally connected to one of the cane members 20, 20 on the other end.

Abstract: A device to aid elderly or disabled persons to gain a standing position from a seated one is provided that is made up of a platform and a handle that can be easily transported and placed in front of a chair or other seating device to help a person in rising from a chair or lowering oneself into a chair. The handle is made of a U-shaped tube that is pivotally attached at one end to the rear of the platform. The pivotal attachment allows the front end of the handle to be lifted to a position that can be easily reached by a seated person when the invention is placed in front of the chair. The pivoting attachment also allows the handle to be folded down to a flat position in relation to the platform which makes it easy to move and store the invention.

Abstract: The invention concerns a A stick such as a ski pole, a walking stick or the like, which has a pole grip and a pole tube, the length of which can be altered, as well as an adjusting device with which at least one gripping area of the stick pole grip can be adjusted in a bent position relative to the pole tube. The purpose of the invention is to obtain a stick which can be folded into a compact unit as small as possible. To this end the pole tube has two sections joined together by the adjusting device and the adjusting device is accommodated outside of the pole tube of the stick.

Abstract: A retrieval mechanism for extending an arm from a fallen elongated walking appliance, such as a walking cane or crutch, to enable the appliance to be retrieved without requiring any bending over by the person retrieving the appliance. An elongated arm is spring biased to an actuator mechanism and the actuator mechanism includes structure for retaining the arm in non-extended relation parallel to the axis of the elongated walking appliance and for extending the arm therefrom responsive to impact of a transverse member on the extendible arm with the surface upon which the walking appliance has fallen.

Abstract: An arm extending assembly for attachment to a walking appliance such as a walking cane, to enable the appliance to be retrieved without requiring the user to bend over. The device extends an extendible arm upwardly in a direction normal to the surface upon which the walking appliance has fallen. The arm is extended responsive to impact of the assembly on the surface, such as the ground. The arm extending assembly includes a base member for attachment to a cane, an actuating mechanism including a spring biased rotatable arm for imparting rotation to the extendible arm, a spring biased locking mechanism for releasably locking the actuating mechanism to the housing and ground engaging means operatively connected to the spring biased locking mechanism for release of the locking mechanism to permit rotation of the rotatable arm of the actuating mechanism and, thus, rotation of the extendible arm responsive to impact of said ground engaging means with the ground or surface.

Abstract: The present invention is directed to a walker. The walker includes a front frame having opposing lateral ends and which is formed substantially from a polymer. First and second side frames are connected to the front frame at the lateral ends thereof, respectively. Each side frame is formed substantially from a polymer and has fore and aft generally vertical leg portions. A first handle is positioned at an upper region of each side frame. The side frames can be pivotally mounted to the front frame.

Abstract: A wheeled triple-leg walker includes an upright tube, two F-shaped armrest frames respectively turned about the upright tube, a stretcher bar having a first end pivoted to one armrest frame and a second end adjustably connected to the other armrest frame to maintain the contained angle defined between the armrest frames, three wheel assemblies respectively mounted on the armrest frames and the upright tube at a bottom side for supporting and moving the wheeled triple-leg walker on the ground, and two armrest pads respectively mounted on the armrest frames at a top side for supporting the user's forearms when the user moves the wheeled triple-leg walker and walks.

Abstract: A folding walker includes a pair of side frames each of which includes front and rear legs spaced from each other and held together by upper and lower connecting members. At least one lateral cross bar connects the front legs of the side frames, and the connections between the cross bar and the side frames is pivotable to permit the side frames to be pivoted from open positions in which the side frames are substantially perpendicular to the lateral brace and collapsed positions in which the side frames are substantially parallel to the cross bar. Latches hold the side frames in the open positions or in an intermediate position, between the open and collapsed positions, in which the side frames are at an acute angle to the cross bar so that the side frames and the cross bar form a generally triangular configuration to facilitate use of the walker on stairs.

Abstract: A walking aid device has a curved handle member designed to conform to the shape of the body which will allow a person to lean on the device when the hands and arms need to be free while standing. The handle member curves downwardly, slightly forwardly and continuing in a downward bow to connect to an appendage or shaft portion. The shaft portion bends slightly inwardly and continues straight down to a foot member. The walking aid device allows a person to walk with the momentum of using a cane and the stability of using a walker.

Abstract: A foldable seat for a foldable invalid walker where the seat folds flush against the side of the walker when the user is not using the seat.

Abstract: A collapsible walker that includes a front frame, a pair of side frames, and a pair of levers. The front frame has a pair of skewed surfaces. The pair of side frames are hingedly attached to the front frame and are parallel thereto when the collapsible walker is in the closed position and are perpendicular thereto when the collapsible walker is in the open position. The pair of side frames have notches therein with skewed surfaces, with the pair of skewed surfaces of the front frame being vertically movable in the notches. The skewed surfaces of the pair of side frames move relative to the pair of skewed surfaces of the front frame as the collapsible walker is achieving the open position, until such time as it achieves the open position in which the pair of skewed surfaces of the front frame and drop down in the notches and mate with, and abut against, the skewed surfaces therein so as to prevent relative rotation therebetween and further rotation of the pair of side frames in both directions.

Abstract: An actuator mechanism for extending an arm from a fallen elongated walking appliance, such as a walking cane or crutch, to enable the appliance to be retrieved without requiring any bending over by the person retrieving the appliance. At least one elongated arm is spring biased to the actuator mechanism and the actuator mechanism includes means for extending the arm therefrom responsive to impact of the actuator mechanism with the surface upon which the object or cane has fallen.

Abstract: A walker which includes a rectangular open back frame, two handrails respectively connected to the two opposite ends of the back frame at right angles and disposed in parallel to each other, each handrail having a sliding track disposed in a sloping position, two front wheel assemblies and two rear wheel assemblies respectively coupled to the handrails at the bottom, a seat frame, and two suspension links respectively and slidably coupled to the sliding tracks to hold the seat frame between the handrails.

Abstract: A portable folding grab bar device for aiding a person to stand from a seated position having four primary components, a base, a support column which pivots with respect to the base, a pivot mechanism, and a handle which the user grabs to rise from a seated position. The support column pivots with respect to the base to enhance portability. The base is designed for the user to stand upon while the handle is grasped, thus the users own body weight is used to stabilize the device in use. The device is constructed from lightweight materials to further enhance portability. The pivot mechanism is designed to prevent over rotation of the support column and to remain rigid and stable after extended use. The pivot mechanism includes a sliding locking block and is inexpensive to manufacture. The handle has a variable extension member so the height of the handle from the base may be varied to suit the users height or reach.

Abstract: A combination walking stick and blind which includes a bi-support blind characterized by a pair of longitudinally half-round, elongated supports pivotally joined at one end, with the flat sides of the supports positioned in facing relationship and the supports fitted with camouflage netting or fabric designed to deploy when the bottoms of the supports are extended in pivoted relationship, and wrapped around the supports when and the supports are aligned, to define a walking stick. In another embodiment three supports define a tri-support blind, which supports may be configured as one-third-round supports that nest when joined together to define a walking stick. Camouflage netting or fabric is attached to the supports by means of looped securing straps.

Abstract: A foldable walker (10) includes a first pair of opposed legs (14,16) and a second pair of opposed legs (13,15). A housing (25) is positioned between the first pair of legs (14,16). The housing (25) carries a lock/release mechanism (35) that includes a depressible button (36). The button (36) is connected to levers (45,47) such that when the button (36) is depressed, the levers (45,47) rotate to translate rods (51,53), respectively. When the rods (51,53) are so moved, pawls (68) connected to the rods (51,53) are rotated out of their normal engagement with bosses (60) carried by the first pair of legs (14,16). The first pair of legs (14,16) may then be rotated with respect to the housing (25) so that the second pair of legs (13,15) are positioned adjacent to each other and to the housing (25).

Abstract: A locking assembly for use with a foldable walker having a pair of side frames, each having a tubular front leg concentrically contained within an end sleeve of a cross brace, includes a housing secured to each of the side frame front legs. Each housing closely receives a locking pin extending through a first bore. The locking pin is movable between first and second positions and includes a locking end which extends into an aperture of a lock plate connected to the end sleeve of the cross brace. An actuating lever pivotally connected to the housing includes a force applying handle which, when depressed, causes the lever to rotate about a pivot point and raise the locking pin from the lock plate aperture thus allowing the side frame to rotate with respect to the cross brace.