Abstract: This invention intends to provide a shock absorbing mechanism for displacement for a stick, an artificial leg etc such as a walking stick, a crutch, a stick for sports, an artificial leg, a walking tool for a patient, a chair, or a protecting bed, in which elastic materials having several different moduli of elasticity are built in a small space of a compression coil spring, and accomplish an elastic sticky force like a human muscle which is light and low in cost.

Abstract: A telescopic umbrella shaft includes at least an inner tube, and an outer tube telescopically slidably engageable with the inner tube, with each tube having a cross section of hexagonal shape consisting of six arcuate rectangular sides each arcuate rectangular side concaved inwardly towards a longitudinal axis of the shaft, and every two neighboring arcuate rectangular sides converging to form a reinforcing rib convex outwardly from the longitudinal axis, with each reinforcing rib formed as an inversed-U shape and having a longitudinal strip defining a horizontal plane perpendicular to a normal line between the longitudinal axis and an apex intersected by the two neighboring arcuate rectangular sides of the tube, thereby forming a balanced moment of inertia of the concave and convex portions of the tube when dynamically rotating the central shaft for greatly enhancing the stability and strength of the umbrella shaft.

Abstract: A telescoping baton having a handle section, a middle section which fits within the handle section, and an end section which fits within the middle section. The middle and end sections can be extended out of or collapsed into the handle section. The handle and middle sections are formed from an injection molded plastic. The end section is constructed of an injection molded skin about a metal core or can be a metal end. A wire clip, or other fastener, located in the end cap on the handle section, engages a bore or back end of the end section when the baton is collapsed thereby releasably holding the baton in a collapsed state. Alternatively, there can be a magnet in the handle section that engages the metal in the end section. All three sections of the baton are injection molded in the same mold at the same time.

Abstract: An expandable baton includes a plurality of sections adapted to be stowed in a nested, collapsed position. The sections may be opened by swinging the baton in a whipping action into a locked extended position. Each of these sections may be made of similar or dissimilar materials, with the tip section having at least a portion being made of a relatively high mass material to preserve strike force when used in a whipping motion and at least one other section being made of a lightweight material to reduce weight of the overall baton. The lightweight section includes lock zones of increased thickness for enhancing the strength and durability of the lightweight section and preserving the overall strength and durability of the assembled baton. The increased material in the lock zones permits the lock zones to be of a greater functional length than prior art single thickness baton sections.

Abstract: A locking structure for two telescoping tubular members is provided with an outer tube member and an inner tube member slidable inside the outer tube member. An expansion member is located within the outer tube member. The expansion member contains at least two tapered members each having innermost and outermost portions, the outermost portions being spaced no more than 1/2 inch from each other. On the expansion member is an outer tube pressure member shaped to fit the expansion to member and disposed between said the expansion member and the inner surface of the outer tube member. The expansion member may be attached to the inner tube member. The expansion member is moved in opposite directions inside the outer tube member so that when said expansion member is moved in a first direction, pressure is directly applied to the outer tube pressure member which in turn applies pressure to the inner surface of the outer tube member thereby maintaining the inner and outer tube members in a locked position.

Abstract: A shock absorbing crutch includes two support shafts having an upper end, a lower end, and a plurality of apertures, an arm rest including two bores positioned on the upper ends of each support rod, two screws being positioned through the bores to secure the arm rest in place, a hand grip being positioned between the support shafts and including an axial aperture extending therethrough, a bolt being positioned through the apertures in the support bars and hand grip; two stabilizing shafts each having a lower end and an upper end being positioned within the lower end of the support shaft, an extension tab being affixed to the upper end of the stabilizing shaft and positioned within an aperture of the support shaft; a shock absorber with an upper section including a spring and a lower section, the lower section being positioned within the upper section, a mounting plate coupling the shock absorber to the stabilizing shafts; and a lower shaft being positioned within the upper shaft and secured in place by the ex

Abstract: A detent mechanism for expandable batons of the type having a handle and at least one telescoping section. The detent mechanism including an elongated, substantially rectangular-shaped, locking button designed to provide a wide, flat surface to wide, flat surface contact for preventing deformation of the locking button and/or the mating tube of the telescoping baton section during the "recoil" and "bounce back" caused by the rapid extension of the baton to its expanded position. The locking button has radiused top edges and a top surface radiused to match the radius of the inner wall of the mating tube. The detent mechanism also includes a radiused inner recess for receiving the locking button and holding the baton in the retracted position and a biasing means in communication with the button for normally urging the button into the extended, projecting position.

Abstract: A cane has an engaging member for securing the cane to downwardly facing surfaces. The engaging member is attached to the shaft of the cane and is movable axially with respect to the shaft. Urging means is provided for urging the engaging member toward a top end of the shaft. When the engaging member is placed below a downwardly facing surface, the urging means urges the engaging member upwardly until a contacting surface of the engaging member contacts the downwardly facing surface. The urging means may comprise a coil spring.

Abstract: The disclosure relates to a convertible adjustable crutch/cane which is initially used as a crutch and subsequently used as a cane after the need for a crutch no longer exists. The crutch/cane includes a novel connector hand/grip support that is made of lightweight, high strength molded plastic. The connector hand/grip eliminates the need for complicated metal working steps previously required in known prior art devices. Additionally, there is disclosed a novel underarm support which is economical to produce requiring a minimum amount of material and is useful in a single support crutch.

Abstract: A ski pole assembly and a ski pole and ski glove combination. The grip includes a central core member of a relatively hard low friction material and an outer sheath member of a relatively soft high friction material. The core member includes raised pads proximate the upper end of the grip and the sheath includes windows receiving the pads so as to expose the pad surfaces and provide low friction pivot areas proximate the upper end of the grip to facilitate the swinging movement of the pole. The core member includes a downwardly opening bore receiving the upper end of the shaft of the ski pole and allowing the shaft to be adjustably positioned in the bore to selectively vary the overall length of the ski pole.

Abstract: A baton, e.g. for use by police, has a shaft and a handle, the handle being movable relative to the shaft between a first position in which it is generally in line with the shaft and a second position in it extends transversely to the shaft. A further handle is extendible when the first handle has been moved to extend transversely, and the shaft of the baton also may be extendible. Thus the baton is convertible from a compact straight configuration to a side-handled configuration.

Abstract: A medical crutch includes a hollow bottom leg member and a pair of hollow side rail members running parallel at a predetermined distance apart, and merged by inflections which are in turn engaged to the bottom leg member at its opposite sides, each of the bottom leg and side members having a cross section of a round-cornered rectangle or an ellipsoid with a flat engagement surface with respect to the adjacent members increasing the resistance to the lateral working loads of the crutch in use and facilitating the assembly of the members as well as the precise punching operations for forming screw holes through which a plurality of screw bolts and nuts fasten the members together; each of the bottom leg and side rail members having a reinforcing means extending inside thereof in a direction vertical to the load-acting lateral direction to prevent a crushing of the member in the punching and a bending operation to form said inflections; and a grip means including concave and convex surfaces formed integral to ea

Abstract: A walker for a handicapped person has a pair of base rails juxtaposed, and a pair of front posts extend therefrom. Each front post is attached to a front of a respective rail. A first pair of rotation-changeable motors drives a pair of actuators, initially pointing upwardly. A first pair of gear reduction devices, which in combination with a pair of rear posts, can be rendered tiltable, has respective input shafts coupled to respective output shafts of the motors. The pair of tiltable rear posts are extendable or retractable by rotation-sense selection of the first pair of motors. A pair of crutch supports are in contact with the rear posts, Which fit under the armpits of the handicapped person. A pair of levers which extend outwardly and downwardly from the pair of crutch supports, respectively, are bent rearwardly, and equipped with handles.

Abstract: A telescopic and foldable crutch structure includes an armpit seat, two telescopic inner tubes each having a top end on which the armpit seat is disposed, two telescopic outer tubes telescopically receiving the inner tubes, a handle adjustably coupling the telescopic inner and outer tubes with each other, a locking cam having a locking pin, two coupling blocks, two outer coupling tubes, an adjusting outer tube, an adjusting inner tube, a cap member fitted on bottom ends of the outer coupling tubes and the adjusting outer tube and a pad member fitted on a bottom end of the adjusting inner. The adjusting outer tube is tightened by the locking cam, The adjusting outer tube, is pivotally connected with the telescopic outer tubes by the locking pin and tightened between the telescopic outer tubes by the locking cam. The locking cam is adapted to be pulled upward, permitting the adjusting outer tube and the outer coupling tubes to be folded upward.

Abstract: The invention relates to a securing means for the telescopic stick of a multiple-fold umbrella, mainly comprising a U-shaped resilient element having round holes disposed thereon mounting on a stub with the two end portions extending into the grooves situated on the sides of the stub. On the stub is transversely arranged a hole that provides rooms for a spring and a locating plunger. The stub, integrated with the spring and the plunger, is placed into an inner tube where the stub, in conjunction with detent balls and positioning holes on the peripheral walls of the inner and the outer tubes, can provide stable, reliable latching and positioning functions for telescopic tubes as the umbrella is opened.

Abstract: A baton structure having first and second cylindrical housings arranged for securement relative to one another are provided, wherein each of the first and second housings include housing tubes and rods arranged for telescoping extension and locking relative to each of the housings, with each of the rods having a resilient tip for use as a friction tip to promote displacement along a skating surface by an individual. The first housing includes a reflective mirror structure for viewing traffic conditions rearwardly of an individual, with the second housing having a fluid dispenser to dispense a defensive fluid such as (MACE) therefrom.

Abstract: A stairway climbing aid having a plurality of individual adjustable half-step members fixedly connected to a rigid elongated channel member at spaced locations along the length of the latter to comprise a rigid assembly. The channel member is connected to each of the half-step members adjacent the rear end of the latter and at an elevation and angle such that the channel member will extend upon or adjacent the outer edge of the tread of each step. The half-step members are longitudinally adjustable so that their length can equal the depth of the particular steps to which they are applied. Thus, any stairway can be readily modified to facilitate travel thereover by persons having difficulty in taking full steps, by applying such an assembly to the steps along one side of the stairway, after adjusting the individual half-steps to the depth of the treads.

Abstract: The invention provides a lighted walking cane, having an elongated body portion with an upper end and an opposite lower end, the body portion having a translucent portion adjacent the lower end. The walking cane also includes a handle on the upper end, an illuminating means in the body portion to supply light through the translucent portion, and means on the cane for powering the illuminating means. A reflecting means disposed within the translucent portion opposite the illuminating means so as to project light in the preferred direction is also provided.

Abstract: A crutch structure including an armpit seat, a lateral tube assembly having two lateral tubes, a handle assembly, a middle supporting tube, a bottom cap and a telescopic tube. The lateral tubes are symmetrically arranged, each including an outer semi-circular tube section and an inner rectangular beam section. Multiple aligned pairs of transverse through holes are formed on predetermined portions of the lateral tubes. Lower portions of the lateral tubes first extending downward and toward each other and then extending straight downward in parallel with each other. The handle assembly is adjustably locked on the lateral tubes. The middle supporting tube includes a central circular tube section having multiple aligned pairs of circular through holes formed on front and back sides of the circular tube section, and two lateral substantially C-shaped outward open rib sections corresponding to the rectangular beam sections of the lateral tubes.

Abstract: A expandable police baton embodying a cylindrical sleeve within which is slidably disposed a cylindrical shaft. The sleeve and shaft are formed with flats to prevent rotation of the shaft within the sleeve. The baton also includes a shock absorbing assembly positioned on the shaft.

Abstract: A novel form of crutch is provided which can be used, particularly by paraplegics, to move between sitting and standing positions. The crutch includes a unique foot mechanism which gives added stability to the user of a pair of the crutches during such sitting/standing transitions, and which can be retracted so as to avoid interference with normal crutch-aided walking. A set of such powered crutches, incorporating both power extension/retraction and power foot adjustment, are capable of extended powered operation with on-board electrical power, and use power only for adjustment and are self-locking into adjusted positions. The power assist of the crutches are controllable from switches strategically located by the crutch handles so the user can manipulate the control switches without releasing his/her hold on the crutch handles. Also disclosed is a unique method of assisting disabled persons, using such crutches, to move between seated and standing positions without further assistance.

Abstract: A collapsible recuperating walker having a seat frame and a standing frame is provided. The seat and standing frames are combined with bendable rods extending between the respective two side frames thereof. Each of the side frames are adjustable in height. The bendable rods are angularly displaced to collapse the walker to a smaller size for carrying and transportation. Casters are provided and are controlled to stop or to provide resistance, by means of brake units.

Abstract: A walking aid cane comprising a base plate having an undersurface and an opening extending through the base plate; a substantially U-shaped reinforcing plate comprised of a central plate and two substantially parallel leg plates connected together by the central plate, the leg plates each having a free edge positioned adjacent to the undersurface of the base plate, and the central plate having an opening; an upright support including a lower end extending through the openings of the base plate and the central plate and connected to the base plate and the central plate thereat, respectively, and an upper end having a handle for permitting the user to grasp the cane; and a plurality of legs for supporting the cane on a surface, the plurality of legs being connected to the substantially U-shaped reinforcing plate at outer surfaces of the leg plates and being connected to the undersurface of the base plate such that the legs are in spaced relation to the upright support.

Abstract: A support device (10) for use with chairs (100) wherein the support device (10) includes an enlarged generally flat rectangular base member (13) provided with a pair of adjustable support arm members (15) on its sides wherein the weight of the chair (100) enhances the frictional engagement of the bottom surface (13") of the base member (13) with the floor even before the user attempts to sit in the chair (100) or otherwise comes into contact with the support device (10).

Abstract: An adjustable blind for concealing a user comprises a concealing element having a surface defining a plane behind which the user is concealed, a shaft connected to and holding the concealing element, and a support stand positioned on a surface and connected to the shaft for supporting same. The shaft and support stand are interconnected by a bracket, the bracket being adjustable so that the orientation of the shaft relative to the support stand, and thus the orientation of the concealing element relative to the surface, can be varied. The support stand comprises a pair of telescopically mounted elements and a stop mechanism mounted on one of the elements, the positioning of the stop mechanism being adjustable so as to vary the length of the support stand.

Abstract: A wheeled walker for ambulatory patients and people requiring support while walking includes an adjustable and separable frame and an adjustbable height seat and handlebar. The frame includes a front generally inverted U-shaped section coupled to and supported by fixed front wheels. A height adjustable handlebar is slidably and lockably received in the front frame section. A centrally disposed frame member is curved and directed to the rear. The rear frame section includes a member which adjustably couples to the centrally disposed front frame member and a vertically adjustable seat. The lower portion of the rear frame section is bifurcated and receives a pair of pivotable casters.

Abstract: An extendable baton includes a hollow tubular barrel with nesting telescoping members which may be extended to a fully expanded position. The telescoping members are held in the closed position and the opened expanded position by a detent lock, with the ends of the telescoping members designed to engage each other in a positive, rigid, non-interfering relationship by using multiple, parallel tapered stop surfaces.

Abstract: The disclosure relates to a crutch which is readily disassembled into a plurality manageable components which can be conveniently tucked away when not in use. The components can be easily adjusted to accommodate persons of different heights. A significant safety feature of the disclosure is the fact that each of the two release subassemblies is provided with a release pin sleeve that ensures a quick and efficient release of the release pin and subsequent re-engagement without the release pin hanging-up and thereby preventing injury to the user. A first embodiment discloses the height adjusting support member receiving both the upper and lower support members therein, while the second embodiment discloses the height adjusting member receiving only the upper support member therein with the lower support member receiving the height adjusting member therein.

Abstract: An improvement in walkers including a set of specially designed, spring biased, retractable casters on at least the four corner legs of the walker apparatus to assist the user in moving the walker apparatus from one point to another. The walker further includes an adjustable seating system situated to the rear of the user for ease of utilization without the need to turn around when seating oneself. Additionally, an accessory food tray sub-system is provided. The walker is designed to provide an effective means for invalids, the elderly, and the like to comfortably, easily and without fear move about an area, while also having a seat and tray readily available so that the user can rest and even comfortably sit and eat or engage in other activities, thereby relieving the user of the necessity of having to manipulate furniture in sitting and getting up, an often painful process for the infirm.

Abstract: The support member of a motorcycle simulation push toy which connects the wheel to the handlebars is fashioned from a pair of telescoping pieces so that the length of the support member can be adjusted. The support member can be fixed at several predetermined lengths by means of a plurality of through-bolts and nuts which securely fasten the telescoping pieces in a particular position.

Abstract: A self-opening cuff comprising a fixed member, to which a cylindrically curved cuff is pivoted for swinging movement in a vertical plane. The fixed member is rigidly attached to the crutch tubing, and has two laterally projecting, angularly spaced side arms with an included angle of approximately 90.degree. between them. The two side arms have a cylindrically curved inner surface with the same radius of curvature as the cuff, and this curved surface is interrupted at its midpoint by a vertical slot. Disposed within the slot and swingably connected to the fixed member by a pivot bolt is a lug which is provided on the outside of the cuff. The top portion of the cylindrically curved surface is smoothly rounded with a curvature having its center at the pivot bolt axis, forming a ramp that the outer surface of the cuff rides on as it swings upwardly.

Abstract: A crutch assembly capable of having its longitudinal dimension adjusted by a movable lower leg member selectively positionable between an outwardly extended position and an inwardly retracted position through operation of a trigger mechanism. The trigger mechanism either attaches or releases the lower leg portion relative to an elongated base of the crutch and prevents or allows movement of the lower leg portion between the extended and retracted positions due to force exerted on the lower leg member by a biasing spring or by gravity. The height of the crutch is thereby selectively adjusted for adaptation to different elevations of the surface over which a user travels such as when traversing steps, stairs, ramps, etc.

Abstract: A knock down spring whip assembly including a hollow housing which serves as a handgrip, and also stores a spring subassembly formed of lengths of helically wound springs of sequentially increasingly larger diameter size to move between a telescoped position within the housing and an extended whipping position projecting from one end of the housing with the springs wedgingly engaging each other in an end to end arrangement. A removable closure unit is provided for plugging the other end of the housing to define a storage compartment. The closure unit includes an integral magnet for retaining the spring subassembly in the telescoped position, where the closure unit can be replaced with other types of closure units. The housing includes a tapered end and an annular constriction for providing both a wedging engagement of the projecting springs as well as a positive locking action.

Abstract: A self-adjusting crutch containing a central portion having both a fixed and a moveable central post, one of which nests within the other. A prepositionable height fastener cooperates with a coupling collar, both of which are disposed on the central portion to predetermine the amount of extension. When the fastener and coupler are in cooperation, the leg can be extended and retracted repeatedly the exact same distance.An improved hand grip is also disclosed.

Abstract: A walker for aiding the movement of an invalid or other infirm person, comprising a plurality of rigid sections. Each of the sections has two laterally spaced-apart ends. Junction means are provided for removably securing the ends of the rigid sections to each other. Some of the rigid sections are removable from some of the junction means and the walker to form a cane. In addition, the rigid sections are recombinable with the junction means to form a cane. The rigid sections are preferably tubular to provide lightweight strength. These rigid, tubular sections may also include a telescoping portion having a plurality of holes or apertures for adjusting the height of the walker to suit each individual user, and for adjusting the width of the walker.

Abstract: A convalescent aid is disclosed for assisting partially incapacitated persons in sitting down or standing up from an elevated surface. The convalescent aid of the present invention includes a pair of parallel spaced-apart handle portions which may be grasped by a person to support his or her body weight while sitting down or standing up. In one embodiment, the aid can be positioned for use on top of the elevated surface such as a bed or sofa, for example. In an alternate embodiment, the aid may include extended front legs which extend down to the floor, thereby providing a more stable support for the person's weight.

Abstract: A stowable crutch is disclosed which includes a body consisting of a first and a second tube secured to each other. A third tube to which a crutch tip is attached is slidably mounted within the first tube and includes a plunger assembly to secure the third tube in any one of a plurality of fixed positions with respect to the first tube. A fourth tube, to which an underarm assembly is secured, is slidably mounted within the second tube and also includes a plunger assembly to secure the fourth tube in a number of desired positions with respect to the second tube. A hand grip is mounted to the body with a ball-and-socket joint to enable adjustment of its orientation with respect to the body.

Abstract: A collapsible cane having a series of interfitting smaller and larger telescoping sections which are interlocked against collapse, when extended, is disclosed. The smaller interfitting telescoping section includes an internal expansion device activated by relative rotary movement between adjacent larger and smaller interfitting telescoping sections for engagement with an inner wall of the larger interfitting telescoping section. The internal expansion device operates against a circumferential depression provided in the larger interfitting telescoping sections enabling the internal expansion device to expand against the internal wall of the larger interfitting telescoping section.

Abstract: A collapsible cae or the like is disclosed as having a series of interfitting telescoping sections which are interlocked together when collapsed and interlocked against collapse when extended. The collapsible cane includes first interlocking elements for externally interlocking the interfitting telescoping sections together as a unit when collapsed, and also capable of being released, by hand pressure, to permit elongated extension of the interfitting telescoping sections. When extended, second interlocking elements are provided for internally interlocking adjacent telescoping sections together against collapse. The second interlocking elements may also be deactivated to permit collapse and telescoping of adjacent interfitting telescoping sections relative to one another for compact storage, when collapsed, and for subsequent re-engagement with the first interlocking elements to hold the telescoped interfitting sections together as a unit.

Abstract: An improvement to a tubular height adjustable crutch of the type having a foot telescopically slidable within a carrier tube supported between the parallel lower ends of two crutch bows, where the crutch bow ends are right cylinders cut so as to form a right angle corner with the footpiece or carrier tube. A unitary end cap is fitted over the bow ends and the carrier tube for retaining these three members together and to provide an integral bushing for supporting the footpiece against wobbling within the carrier tube. The improvement consists of modifying the cap bottom to provide slanting edges or surfaces for deflecting staircase edges away from possible engagement with the corner defined between the bow ends and the carrier tube, thus preventing consequent injury to the crutch user.

Abstract: An improved height-adjustable crutch is provided in which the central carrier member, in which is telescopingly received an extensible leg member, is provided with laterally extending ribbed members, defining exterior concave surface, which matingly received therein the cylindrical portions of the diametrically-opposed tubes defining the lower extremity of the crutch proper. Each tube is coupled to a respective one of the ribbed members via a rivet, each rivet being independent of the other, so as to not to obstruct the interior, hollow passageway formed by the central carrier member, to allow for the sliding movement of the leg member in the central carrier member.

Abstract: A telescopic centerpost of a multiple-fold umbrella includes an upper retainer having an upper catch protruding leftwardly for supporting a left portion of a slider of umbrella canopy and spokes and a slider straightener having a protrusion protruding rightwardly for retaining a right portion of the slider for keeping the slider stably vertically, and at least a reinforced catch having two balls respectively engageable with two sets of double holes respectively formed in an inner tube and an outer tube for firmly coupling the inner and outer tubes.

Abstract: A telescopic combined crutch and walking stick, having a lower ground-engaging tube; a middle tube mounted slidably and non-rotatably in the ground engaging tube and lockingly therein for positioning it in the lower tube in one of several selectable positions; and an upper tube mounted slidably and non-rotatably in middle tube and lockingly therein for positioning it in the middle tube in one of several selectable positions. The tubes are of a length such that, when they are fully retracted one into the other, the length of the combined crutch and stick is about 1/3 the length when fully extended. The combination further includes an armpit support mounted at the upper end of the upper tube, and a walking stick handle mounted at the upper end of the middle tube.

Abstract: A convertible crutch is disclosed having a generally L-shaped upper support section to a generally S-shaped central support section connected, in turn, to a substantially straight lower support portion. The connection mechanism between the upper support section and the central support section can be utilized to connect the upper support section to the lower support section and convert the crutch to a cane when the central support section is removed.

Abstract: This invention relates to a double-locking adjustable brace especially one which comprises an inner rod, an outer tube, a locking device consisting of two cams, two brake shoes. A spring and a driven plate, and a torsion reducer consisting of a plastic cover, a pivot screw and a concave support. The inner rod is telescopically fitted in the outer tube so that the brace is adjustable in length. The inner rod disengages and engages one of the cams by means of internal and external toothings so that the cams of the locking device can be turned to expand and make the brake shoes to grip the outer tube. The torsion reducer consists of a special washer, a screw pivot, a metal support and a plastic cover and is constructed in such way that the plastic cover can turn freely on the screw pivot to reduce the torsion incidentally applied on the brace.

Abstract: A device, used in pairs, to provide upper body exercise to walkers, joggers and runners. A device which provides a total body exercise concept for said users. A device which emulates cross-country skiing during said use. A device which has a frame with a handgrip and foot thereon. The handgrip height can be adjusted as required. Weights can be added to the frame for a more balanced exercise routine of upward and downward force. The changeable foot is designed for ground and other supporting surface contact and provide for the rocking motion of the frame and to maintain good ground coefficient of friction.

Abstract: A crutch of tubular construction has two crutch bows with straight parallel lower ends, between which is a leg carrier tube held by an upper fastener and lower rivets, and a crutch leg telescoped in the carrier tube. Weak points are avoided by gradually flattening the bows from a cylindrical cross section at the upper fastener through intermediate partially flattened bow portions to fully flattened bow ends at the lower rivets.

Abstract: A height adjustable crutch comprised of a one piece member which can serve as the combination of the bow and the carrier without any bolt and pins used in conventional types for securing them, so the structure of the height adjustable crutch is simpler and stronger than the conventional types that we can find today.

Abstract: A telescopic stick for a shortenable umbrella having at least two telesco parts guided in one another so as to be secure against relative twisting or rotation about their longitudinal axes; the two parts being provided with complementary polygonal profile or cross-section; the polygonal profile comprising at least 10 facets which embellish the umbrella stick and improve its jewel-like appearance while functioning to prevent relative rotation and preserving stability of operation as the stick is telescoped from an umbrella "open" to "closed" condition; at least one of the facets of the polygonal cross section having a concave or convex curvature in the circumferential direction.

Abstract: A height adjustable crutch having a bow comprised of a pair of hollow tubular vertical members which are angled downwardly toward each other with their lower extremities aligned in spaced-apart parallel relationship in their hollow tubular condition. A hollow tubular carrier is disposed between and in abutment with these tubular extremities and the three members are secured, as by bolt through them in the upper area where they are in abutment, and by an integral encircling element at their lower extremities, the encircling element being pinned at externally diametrically opposite points of abutment of such element with the extremities of the tubular members. The tubular carrier is orificed at selective intervals and receives an orificed telescoping foot member provided with at least one radially outwardly spring biased detent. This detent serves to lock the foot member in any disposition relative to the carrier when the detent is passed through any registering orifices of the carrier and foot member.