Abstract: A sealed coupler includes a splined pin that moves axially inside orifices formed in the two or more members, and a rotating actuator. The actuator can be threaded to engage a threaded end of the pin, or it can include one or more cams to engage one or more cam followers coupled to the pin to move the pin inside the orifices. The pin moves axially between a locking position, where the members are rotationally locked, and an unlocking position, where the members are free to rotate relative to each other, in response to rotation of the actuator.

Abstract: A broom is provided with a rotatable brush head connected to a handle. The brush head and handle each have a longitudinally extending axis located in a common geometric plane. The brush head has a base with a downwardly extending element which, by tongue and groove configuration, engages a separable attachment member which is adapted to receive the handle. A manually operable member with a knob, controls the movement of the attachment element and hence the handle in relation to the brush head, allowing the brush head to rotate to a plurality of angles of alignment with the handle within the common plane. The brush head element, attachment member, and control member are secured together by means of a spring bias system, consisting of an elongated bolt or similar means and a coiled spring. This system secures the attachment member and control member to the brush head in a tightly biased manner, to maintain the brush head in position on the handle.

Abstract: A playyard system having an upper rail assembly with two parallel upper long side rails and two parallel upper short end rails. Each of the upper rails has a hinge with horizontal pivot pins adjacent to the midpoint thereof. The upper rail assembly also includes four upper corner brackets with hinges coupling the remote exterior ends of the four upper rails for rotation thereabout. In association with the upper rail assembly is a lower rail assembly with two parallel lower long side rails. Each of the lower rails has a hinge with vertical pivot pins adjacent to the midpoint thereof. The lower rail assembly also includes four lower corner brackets with pivot pins coupling the exterior remote ends of the lower rails to the lower corner brackets for oscillation of the lower rails about their axes and for pivoting with respect to the corner brackets. A pair of lower cross bars is included as part of the lower rail assembly.

Abstract: A new pivot bracket assembly for mounting items, such as coaxial cable and microwave waveguide, to a structure such as an antenna. The device includes a pair of disks with each disk having a generally circular hole therethrough. The inner faces of the disks are positioned adjacent each other with the holes of the disks coaxial to each other. The threaded portion of a threaded fastener is extended through the holes of the disks such that the head portion of the threaded fastener is positioned adjacent the outer surface of one of the disks and the threaded portion extends outwardly from the outer face of the other of the disks. A nut is threaded on the threaded portion of the threaded fastener to hold the disks together. The outer surface of each of the disks has an angle arm outwardly extending therefrom. Each of the angle arms has a generally circular hole therethrough.

Abstract: A connection device allows for mounting a control panel in a manner such that the panel projects from the front lower edge of a control apparatus. According to the invention, optimum adjustment of the control panel relative to the front of the control apparatus is achieved in that the connection devices take the form of angle plates which are assembled from two leg parts and can be set and secured in a plurality of angular positions about an axis aligned parallel with the lower edge of the control apparatus.

Abstract: The present invention relates to engagemnent devices and coupling members for forming a structural frame work for hollow tubes. One form of engagement device comprises a hollow sleeve (1) through which a tube (31) may be passed. The hollow sleeve has a deformable flared portion (2). A further hollow sleeve member (12) is immovable on the outside of the first sleeve and has a surface (13) arranged to co-operate the flared portion to cause it to deform to grip the tube (31). A further engagement device comprises a hollow sleeve portion (100) which is distendable to grip a tube mounted on its surface. A trustoconical wedge (101) is movable within the hollow sleeve potion (100) to cause to distend. A number of engagement devices may be connected together to form coupling members for connecting tubes to form a structural frame work.

Abstract: A lockable hub device having a base that accommodates about a central axis a ganged pair of lockable attachment rings, a corresponding pair of locking and release elements, and a top cap, the entire assembly being secured by means of an assembly element that engages both the base and the top cap. The articulating members to be adjusted, e.g., the legs of a table or other foldable device, are attached to one of the lockable attachment rings. For simplicity of use, it is intended that each of the locking and release elements be constructed to extend partly through lumens defined by the top cap such that they may lockably engage the cap while retaining their partial extension therethrough, and such that release of each element may be achieved in a similar fashion as the locking operation.

Abstract: A mounting apparatus includes a base and receptacle for receiving the base in a support surface. A mounting assembly for mounting a mobile device may be secured to the base. The mounting apparatus may be secured to a support surface with a securing member, such as a thumbscrew, using one hand. In an embodiment, the mounting apparatus includes a cylindrical base including a mounting hole and a bottom surface having a securing pin. The mounting apparatus also includes a mounting assembly and a receptacle that has a bottom surface and inner surface forming a cylindrical receiving portion having a mounting hole. When the base is inserted into the receiving portion of the receptacle and rotated, the securing pin is received in the securing hole and the bottom surface of the base contacts the bottom surface of the receptacle.

Abstract: A power machine comprises an output manipulation system for controlling an output of a power source given to a working member and a brake manipulation system for stopping the movement of the working member. A pair of output manipulation restriction portions is disposed between the output manipulation system and the brake manipulation system. The output manipulation restriction portions abut to each other so as to restrict output manipulation to the working member by an output manipulation member when the working member is in the braked state. Furthermore, a pair of brake manipulation restriction portions is disposed between the output manipulation system and the brake manipulation system. The pair of brake manipulation restriction portions abut to each other so as to restrict brake manipulation of the working member by a brake manipulation member during the power source gives the output to the working member.

Abstract: An indexible tool (for example, a wrench) in which the handle of the tool stays in a constant horizontal plane with respect to the horizontal plane of the head of the tool and the tool has locked and unlocked positions through a movable splined pin connecting the head and the handle of the tool.

Abstract: An improved structure of an extendable multi-directional connecting rod for dusters, in particular a duster having a bending structure and a retractable connecting rod structure connected to a rear end thereof, including a duster handle portion, a retaining connector, a locking connector, and a retractable connecting rod. The handle portion is hollow and internally threaded for receiving outer threads of the retaining connector. The retaining connector further has a curved plate portion behind the outer threads. The curved plate portion has a central round hole and radial grooves extending from the round holes at both sides of the curved plate portion. The locking connector includes a forked portion for receiving the curved plate portion and an internally threaded rear end portion for screwably engaging the retractable connecting rod.

Abstract: A tool having a tool handle and a tool head. A connecting member is provided on one end of the tool handle, with the axis of the connecting member extending transverse to the tool handle, and a connector is provided on the non-working end of the tool head. The connector cooperates with the connecting member to connect the tool head to the tool handle. Preferably the tool head is detachably connected to the tool handle. The tool head can be adjustably connected to the tool handle to be able to adjust the angle of the tool head to the tool handle.

Abstract: A fixing device for use on a bicycle to removably secure a universal mudguard to the rear wheel of the same. The mudguard is provided with a ball-shaped supporting member at one end thereof. A pair of symmetric clamping pieces are removably secured to the seat pillar of a bicycle by a fastening bolt and nut. Each clamping piece has a semi-spherical cavity on the inner wall thereof, having radially extended protrusions in correspondence to the ball-shaped supporting member, so as to permit the supporting member to be adjustably retained therein.

Abstract: This invention is a boat covering system with adjustable bracket devices clamped to the outer stanchions of a boat. Flexible support ribs extend across the boat and are inserted into the pair of brackets located on opposite sides of the boat. These flexible support ribs form the main framework for the boat cover. The brackets are adjustable around a plurality of axes for adjustability of the overall cover height and configuration.

Abstract: An indexible tool (for example a wrench) in which the handle of the tool stays in a constant horizontal plane with respect to the horizontal plane of the head of the tool and the tool has locked and unlocked positions through a movable splined pin connecting the head and the handle of the tool.

Abstract: A golf club having a blade which is securable to the shaft of the club at a plurality of different angular positions to vary the loft of the striking face of the blade. The invention is a substitute for an entire set of iron golf clubs, including a putter. The club shaft has a frustoconical spline at a lower end thereof having a plurality of teeth which taper inwardly. The spline is received in a mating socket formed at the tail end of the blade when the blade and shaft are releasably coupled together.

Abstract: In a joint-arm awning comprising two joint arms disposed on a support pipe, it being possible by fastening brackets to join the support pipe to the wall of a housing, and devices being provided for adjustment of the angle of inclination of the awning in order to constructionally simplify the adjustment of the angle of inclination and obtain defined retraction conditions regardless of the adjusted angle of inclination, that the support pipe is substantially round, having a longitudinal groove, with which engages a locking element for adjustment of the angle of inclination.

Abstract: The present assembly provides a coupling element for an adjustable hand lever mechanism. The coupling element having an disk shaped body, an extension and a projection. The disk shaped body has a D-shaped opening extending longitudinally therethrough. The coupling element may be made from a material, e.g., metal, that is harder than the material, e.g., plastic, from which the hand lever is made. The extension of the coupling element protrudes radially outward from the outer circumference of the disk shaped body. The projection is situated outside the disk shaped body of the coupling element and extends upward from the upper surface of the extension in a direction substantially parallel to the D-shaped opening of the disk shaped body. The D-shaped opening allows for ease of manufacturing by using a die having a D-shaped core for molding a hand lever about a coupling element.

Abstract: A yoke member comprises a pair of handle-engaging members supported from a connecting member with at least one of the handle-engaging members attached to the connecting member with a living hinge to provide a one-piece attachment for a tool to enable a tool handle to be secured between the handle-engaging members.

Abstract: Apparatus for adjusting a first member relative to a second member comprises a button with two sets of teeth and movable between first and second positions. When in the first position, both sets of teeth engage sets of teeth carried by the first and second members to prevent relative movement of the first and second members. When in the second position, one of the sets of teeth carried by the button disengages one of the sets of teeth carried by one of the first and second members to allow relative movement thereof.

Abstract: A canopy for providing shade and protection from the elements to persons is disclosed. The canopy includes a silent pivoting mechanism and a quick-release feature.

Abstract: An elbow joint assembly including two elbow joints mounted on two opposite ends of a shaft around a screw rod, each elbow joint including a fixed elbow having a barrel raised from the periphery and fixed to a locating rod of a mechanism, two movable elbows turned about the shaft and having a respective barrel raised from the periphery and holding a respective rod, two constraint blocks mounted on the shaft and forced to hold down the movable elbows and the fixed elbow in between the movable elbows, two spring elements mounted around the shaft between the movable elbows and the constraint blocks to force them apart; and two levers respectively pivoted to the shaft and turned between a first position in which the constraint blocks are forced into engagement with the movable elbows, causing the movable elbows and the fixed elbow to be firmly retained in position, and a second position in which the constraint blocks are released from the movable elbows, for permitting the movable elbows to be respectively turned

Abstract: An adjustable tool with a locking hinge mechanism is disclosed which is movable between a plurality of selectable positions. A hinge pin splined along substantially its entire length holds the portions of the tool together, and is movable between an unlocked position and a locked position. In the unlocked position, the tool is adjustable, and in the locked position the tool is fixed in position and suitable for use.

Abstract: A bendable joint for a collapsible playpen includes two disc housings, two discs, a main body and a push cap and two screws. The discs has two sector-shaped projections, and a projeting pin provided on a side wall of one of the sector-shaped projections to engage a pin hole provided in a side wall of one of two opposite projections of the main body to keep the disc housings, the discs and the main body and the push cap in a spread position securely, without potential dangers of the playpen suddenly collapsed by the joint bent by careless press of the push cap.

Abstract: A pivot joint for use in a stroller frame includes a stationary seat member, a pivotable seat member mounted pivotally on the stationary seat member, a spring-loaded retaining member disposed between and engaging the stationary seat member and the pivotable seat member, and an operating knob mounted on the pivotable seat member. The stationary seat member has a confining wall with an inner surface formed with a plurality of first engaging grooves. The pivotable seat member has a surrounding wall with an inner surface formed with a plurality of second engaging grooves, each of which is defined by first and second perpendicular walls. One of the first and second perpendicular walls has an inclined cam face. The retaining member has a peripheral edge formed with a plurality of teeth for engaging the first and second engaging grooves.

Abstract: Adjustable handles for road surface cutting saws are disclosed. The handles are elongated tubular members projecting rearwardly from opposite side edge sections of a generally vertically disposed housing. The handles are independently adjustable, forwardly and rearwardly in the longitudinal direction and angularly about a transverse horizontal axis, to position hand grips on the handles in optimum position for operator control of the saw, operator access to the saw controls and storage of the handles in a forwardmost position to enable the saw to be stored in a compact condition. A pair of substantially identical clamp assemblies including inner and outer clamp elements are mounted on the inside of the side walls adjacent the rear of the housing and clampingly hold the handles in the selected longitudinal and angular positions.

Abstract: A ratcheting articulable monitor support system accommodates storage and presentation of an associated monitor, and is usable with a base and a monitor-mounting member. The system includes an arm with a first end and second end, wherein the first end is pivotally mounted to the base allowing rotational movement of the arm about a first axis and in a first plane. The arm has a range of rotational motion as a result of the pivotal mounting, and that range is characterized as having an arm-rotational-movement-restricting subrange. The system also includes a ratchet member fixedly attached to the arm intermediate the first and second ends, which ratchet member includes a body with a first subregion having arm-rotational-movement-restricting structure. A detent member is also included adjacent the ratchet member and fixedly attached to the arm intermediate the first and second ends.

Abstract: A connector system joins together long rods or tubes at various angles to form a wide variety of shelter frames for diverse applications as well as railings, racks, and the like. The diverse connectors required are assembled from modules of the invention which are bolted together in various combinations. The modules fasten at one end to the rods or tubes. The other end of the module terminates in an annular gear adapted to intermesh at an adjustable angle with one or more gears of other modules. Once bolted together the modules form a rigid connector. The modules may be unbolted and reused to form a connector of another configuration. The few module types required to form the many connector configurations reduces inventory and manufacturing requirements.

Abstract: A locking joint for ratchet wrench having a handle and ratchet head assembly. The locking joint comprises a pin cage having a plurality of pins designed to lock and unlock the handle, a shoulder bolt connected to the pin cage for releasing the pins from within the handle of the wrench and a guide bolt having a counter bore for receiving the shoulder bolt and connected to the ratchet head assembly. The handle is unlocked from the ratchet head assembly when the shoulder bolt is depressed by the user and the plurality of pins are withdrawn from the handle. The guide bolt in connection with the plurality of pins and shoulder bolt assists in maintaining a fixed angle between the ratchet head assembly and handle and serves to align the locking joint.

Abstract: An adjustable bracket and housing assembly mountable to any horizontal or verticle surface designed primarily for passive infrared detective for security systems. The bracket has a mounting member (30), a cylindrical member (20) allowing horizontal adjustability of the housing assembly and a bracket arm (15) having teeth (21) for vertical adjustability of the housing assembly. The housing assembly has a base (10) and removable cover (12). The base is attachable to the bracket arm (15) by a screw (29). The housing assembly cannot be adjusted directionally, unless the cover (12) is removed, thereby providing access to the screw (29). This latter feature makes the unit of the present invention tamper proof as an alarm will be triggered if the cover (12) is removed from the housing assembly.

Abstract: A ratcheting articulable monitor support system accommodates storage and presentation of an associated monitor, and is usable with a base and a monitor-mounting member. The system includes an arm with a first end and second end, wherein the first end is pivotally mounted to the base allowing rotational movement of the arm about a first axis and in a first plane. The arm has a range of rotational motion as a result of the pivotal mounting, and that range is characterized as having an arm-rotational-movement-restricting subrange. The system also includes a ratchet member fixedly attached to the arm intermediate the first and second ends, which ratchet member includes a body with a first subregion having arm-rotational-movement-restricting structure. A detent member is also included adjacent the ratchet member and fixedly attached to the arm intermediate the first and second ends.

Abstract: A modular connector system for tubular structural members includes a variety of connector members, each having a connection wall for connection to a tubular structural member and a mating wall for connection to another connector member. The connection walls include cylindrical mounting collars and segments of cylinders. The mating walls include connector tabs and circular end walls. Each mating wall includes a peg disk relief, a fastener bore, and an array of peg recesses spaced about the bore. The connector members are secured together in sets of two, three, four, five or six by positioning a peg disk between the mating walls of the connector members to be connected together and passing a fastener through the connector members and the peg disk or disks. Each peg disk includes a peg disk plate having a fastener bore and an array of pegs spaced about the bore. The connector members are used to connect the tubular members to form various configurations of temporary shelter structures.

Abstract: An articulating clamp assembly for attaching a traffic control device to a mast arm upright pole or other support member. The clamp assembly includes a saddle clamp which adjustably attaches to the vertical elongate member on the bracket of a traffic signal. Either a cable clamp or a tenon clamp can be included for attaching the assembly to the mast arm or pole. The cable clamp includes inner and outer tubular members which are rotatable relative to each other, and of course the anchor plate of the cable clamp can be positioned anywhere along the length of the mast arm or pole and anywhere around the circumference. Similarly, the tubular end of the tenon clamp can rotated relative to the mast arm for proper positioning. The mast arm clamp and the saddle clamp are joined by a pair of serrated rings which permit a wide range of rotational adjustment between the two clamp members. Thus, the articulating clamp assembly of the present invention permits multiple adjustments.

Abstract: A motor vehicle screen wiper comprises a screen wiper arm having a drive head fastened on an end portion of a motor shaft, which is part of a screen wiper drive unit. The motor shaft end portion comprises a conical portion which is received in a complementary through hole associated with the drive head, and which is extended by a threaded terminal shank on to which a fastening nut is screwed. The radial thrust face of the nut cooperates with a portion, in facing relationship with it, of the upper face of the drive head. The drive head comprises an orientation ring in which the conical through hole is formed, with one face of the orientation ring being formed with a set of ridges which cooperate with a complementary ridged engagement surface formed, in facing relationship with the ridged face of the orientation ring, on the body of the drive head. The body is formed with an oblong through hole through which the end portion of the motor shaft extends.

Abstract: The present invention relates to a bending joint of a collapsible baby playing bed, which comprises:two inner tooth members each having a tubular portion connected with an upper frame of the bed, and teeth; two fitting blocks each having teeth engaged with the teeth of the tooth members, and two opposing sectorial recesses; a connector having two pairs of opposing sectorial projections engaged with the recesses of the fitting blocks, and a recessed portion; two springs; a push cap fitted on the recessed portion; two bolts each passed through the connector, one the spring, one the fitting block, one the tooth member, and a nut. The bending joint of the bed is first and formost lifted upward to loosen a tight engagement of the teeth of the fitting blocks and the teeth of the tooth members and then the cap is pushed inward so that the sectorial recesses of the fitting blocks can disengage and the inner tooth members can be pivoted downward.

Abstract: An articulating hinge assembly for pivotally coupling objects together, comprising a socket member and a cap member. A plurality of resilient prongs on the cap member reversibly engage a bore in the socket member. Outward facing barbs are included on the resilient prongs which engage a recessed region in the bore of the socket member. A plurality of serrations or grooves are included within the recessed region of the bore in the socket member. Outward facing teeth on the barbs of one or more of the resilient prongs engage and intermesh with the serrations in the recessed region of the socket member. Applying rotational force to the socket member or cap member causes the teeth to disengage the serrations and reposition within the recessed region, allowing pivotal adjustment of the cap member relative to the socket member in precise incremental units defined by the size and shape of the serrations.

Abstract: An adjustable arm rest assembly for use on a chair including a support member, an arm rest member, a locking element and an adjustment member. The support member is attached to the chair and extends substantially upward therefrom. The arm rest member extends substantially coaxially with the support member. The locking element is attached to one of the support member and the arm rest member. A projecting portion extends from an end portion of the locking element and includes a first mating element. The adjustment member is attached to the other of the support member and the arm rest member. The adjustment member and the locking element are movable with respect to one another. A plurality of vertically spaced flanges form a plurality of recesses within the adjustment member. Each recess is sized to receive the projecting portion of the locking element and has a second mating element corresponding to the first mating element.

Abstract: A vibration damping universal joint is disclosed for providing three degree of freedom orientation and limiting rotational deflection between a first and second rod portion of a manual transmission gear shift rod. The universal joint includes a first and a second clevis and a rotational isolation mechanism which provides axial deflection of the second rod portion relative to the second clevis and limits rotational deflection between the first and second rod portions.

Abstract: An apparatus such as a digging bucket has a clevis device pivotably connected thereto by a pin held in place by a pin-retaining structure. The clevis includes a plurality of arcuate, lip-like, outwardly-radially-projecting first retention members and the structure includes a cap portion having a plurality of arcuate, lip-like, inwardly-radially-projecting second retention members. Each second retention member engages and "locks" to a separate first retention member. The cap portion, which interferes with free axial travel of the pin, is well secured so that the pin is retained in engagement with the clevis without welding the pin. Avoiding pin welding permits using a substantially-harder pin, resulting in significantly better wear characteristics. A new method for retaining a pin is also disclosed.

Abstract: The hot stick adaptor has two members that are adjustably movable relative to each other. A first one of the members has two separate first ratchet areas. A second one of the members has three separate second ratchet ares. A fastener and spring connect the two members to each other with one of the first ratchet areas and one of the second ratchet areas in interlocking engagement. The two members can be moved away from each other in a first direction, compressing the spring, to disengage the interlocking engagement and thereby allow the two members to be moved in a second direction.

Abstract: A support for a paint coating pad and handle. The support has a base plate for attaching to the paint coating pad. The base plate has a plurality of snap-lock support arms for receiving a shaft of the handle. A latch block having a plurality of locking grooves receives an offset section of the handle permitting the support to be attached to the handle at different working angles.

Abstract: An adjusting device for a hood of a toy stroller includes a middle element engaged to a side tube of the toy stroller, a first side element and a second side element engaged to a first side and a second side of the middle element which has a tubular portion extending laterally from both sides thereof, each tubular portion having a toothed portion defined in an outer periphery thereof, the first side element and the second side element each having a skirt portion extending laterally from a side facing the corresponding toothed portion of the middle element and having a plurality of protrusions extending radially from an inner periphery of the skirt portion for engagement with the corresponding toothed portion, a first support and a second support for supporting the hood, each having two distal ends engaged to the respective first side element and the second side element such that the hood can be extended by rotating the first support and/or the second support by moving the protrusions across the toothed portio

Abstract: A hotstick component has a fastening subassembly for securing the component to another component or a hotstick and allowing reorientation of the component with respect to the hotstick while it is still attached. The component has a fastening end with a through hole. A fastening subassembly includes a screw member and a spring member. The screw member is received through the through hole and secures the other component to the hot stick component. The spring member is received along the screw member and maintains the component in an engaged position. The component is reoriented by moving it against the spring member into a disengaged position, readjusting the component's position, then allowing the spring member to push the component into an engaged position.

Abstract: The invention is related to an articulated joint fitting preferably for automotive vehicles with a wobble gearing to create a swivelling motion of the joint parts. As a development of the articulated joint fitting, a reduction of costs is achieved in that the spur gear wheel is composed of a plurality of elements and a simplified adjustment of the eccentric with respect to one of the articulated joint fittings is attained.

Abstract: An improved rotatable joint of the kind disclosed in U.S. Pat. No. 5,381,570 for foldable tubular playpen frames having a step in the tooth of a recessed sprocket portion in which a connecting gear rests. In order to unlock the joint one must move the gear axially inwardly with a pushbutton as well as relieve the stresses on the joint by lifting up the tubular bars connected to the joint so that the gear may slip off the step. In this way an additional factor of safety is built-in in order to unlock the joint, and accidental release is reduced.

Abstract: An adjustable head golf club has a selection ring (16) positioned with shank end ratchet teeth (19) in ratchet relationship to shank ratchet teeth (20) and with head end ratchet teeth (17) in ratchet relationship to head ratchet teeth (18). A fastener rod (4,10) is extended intermediate a club attachment base (11) on the back side (29) of the club head (1) and a shank attachment base (12) on a shank (2). A fastener head (44, 45, 46) of the fastener rod can be buttressed either against an inward side of the club attachment base or against an outward side of a shank attachment base, depending on design preferences. A plurality of shank end ratchet teeth and shank ratchet teeth is different from a plurality of head end ratchet teeth and head ratchet teeth.

Abstract: A halo style surgical retractor having fixed and movable curvilinear members each of which has an outwardly directed retractor channel extending over the full length of the member. A support arm is attached to the fixed member to hold the fixed member in a desired fixed, but adjustable position. The ends of fixed and movable members are coupled together so that, first, when the members are brought into a generally coplanar relationship, there is an uninterrupted and continuous retractor holder path around the combined length of the fixed and movable members. Second, the couplings permit the movable member to pivot to a position directly above and overlaying with the fixed retractor member, that is, a position in which the movable retractor member is in a plane directly above and generally parallel to the plane of the fixed retractor member.

Abstract: An adjustable coupling including an axle, a fixed toggle mounted around the axle to hold a first frame rod, two movable toggles turned about the axle to hold a second frame rod and a third frame rod respectively, two locating plates mounted around the axle and prohibited from rotary motion relative to the axle and coupled with the movable toggles through a respective toothed joint, two cam holders fixed to the axle at two opposite ends, and two mushroom cam mounted around the axle and engaged with the cam holders, when the mushroom cams are fully received into the cam holders, the movable toggles can be disengaged from the locating plates and turned relative to the axle to adjust the angular positions of the second and third frame rods relative to the axle.

Abstract: An adjustable stem member comprises a vertical tube having a projected portion at one end thereof and a horizontal tube to be rotatably pivoted to the projected portion through a connecting mechanism at one end thereof. The connecting mechanism includes two tubular walls, an end wall and a space defined by the tubular walls and the end wall. A lower locking mechanism includes an upper locking block, a locking block and a bolt. The locking blocks are suitably disposed within the space. When the horizontal tube is adjusted to a suitable angle, the locking blocks are forced to press the end wall of the horizontal tube and the projected portion of the vertical tube.

Abstract: An angle-adjustable joint including an upright stand having a substantially U-shaped mounting frame at the top, a fan support pivotally connected to the U-shaped mounting frame by a screw bolt and a nut, and a lock retained in a vertical groove on the U-shaped mounting frame and engaged with a tooth portion in an annular recess at one side of the fan support to lock the fan support in any of a series of angular positions, wherein the lock has a hooked portion on a projecting rod thereof inserted through a transeverse through hole on the fan support and hooked on a retaining flange at an opposite side of the fan support.