Abstract: A hinge construction for a two part folding mobile phone body has a spindle provided at one end with a torsion spring for applying torque in a closing direction to the two parts of the phone body. A first cam member is mounted on the spindle for movement axially thereof and has a portion engaged with one part of the phone body to prevent reciprocal rotation therebetween. A second cam member is attached to the other part of the phone body. A helical compression spring surrounding the spindle urges the first cam member into engagement with the second cam member. Push-button is disposed at the opposite end of the spindle for applying axial thrust to the first cam member to release the first cam member from the second cam member and allow opening movement of the body parts out of the closed position.

Abstract: A split lockable hinge for a baby bed containing a first hinge wing, a second hinge wing and a lock. An outer and inner legs respectively extend downward from the first and second hinge wings. The lock comprises a plurality of receiving holes on the first hinge wing, a plurality of hooking slots on the second hinge wing which can engage the engaging pin which can be inserted through the receiving holes and the hooking slots, and a plurality of elastic members. The first hinge wing is locked to the second hinge wing by the engagement of the engaging pin to the hooking slots of the second hinge wing by the elastic force of the elastic members. The operation of the split lockable hinge is easier and more stable. The structure of it is easily made. It is easier to arrange the cloth of the baby bed and the volume of the collapsed bed is reduced after collapsing because the rod members can rotate about their long axes. With the split lockable hinge, the jumping dismantling action will not occur.

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 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 hinge positioned at the intermediate extents of the adjacent rail components to hold such components in an aligned orientation including a saddle with a central button aperture, interior plate apertures and exterior end apertures with associated rail pins for pivotally coupling the saddle and the adjacent interior ends of associated rail components, a pair of locking plates each with a plate pin coupling the upper end of each plate to a plate aperture of the saddle, each plate having an opening extending therethrough the plates urged away from each other, a liftable button with an elongated slot and with an associated button pin for slidably coupling the button to the saddle, the button having inclined bearing surfaces on their edges and an inwardly facing projection located at the adjacent interior edge of each adjacent rod segment, each projection having an upper curved surface and a lower planar surface receivable by the bearing opening.

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: A collapsable stroller for transporting a passenger includes a frame movable between a collapsed position and an operating position. The frame includes rotatably mounted wheels for providing the stroller with mobility. A passenger seat is provided for receiving the passenger. At least a portion of the passenger seat is movably mounted on the frame between a first position and a second position. A latch is mounted on the frame and the seat. The latch releasably holds the seat in the first position. The latch, seat and frame are configured such that when the seat is in the first position and the frame is moved from the operating position to the collapsed position, the latch automatically releases the seat and the seat moves to the second position.

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: A control device is provided for folding and expanding armrails of a playpen and includes a socket member having two distal ends each pivotably engaged with a corresponding one of the armrails, a coupling member received in each of the armrails and comprising a biasing member detachably engaged with a corresponding distal end of the socket member, whereby, when the biasing member urges against associated distal end of the socket member, the armrail is fixed to the socket member, and when the biasing member is detached from the distal end of the socket member, the armrail is pivotally engaged with the socket member.

Abstract: A foldable baby crib having a joint, which is located at the center of each top rail of the foldable baby crib, is disclosed. The joint consists of a cover, which pivotally connects the inner ends of the two round tubes of the top rail; a fixed member, which is received and centered within the cover by means of pins; and a movable member, which is movably hung on a fixed shaft of the fixed member. The fixed member has two spring wings with elongated through hole provided on the ears thereof for allowing the pins to pass therethrough and thereby fix the fixed member to the cover. When the two round tubes of the top rail are extended to become a straight line, the pins passing through the ears are extend into a space just below the inner ends of the two round tubes so as to support the same.

Abstract: A docking station for use with a notepad computer is disclosed. The main electronic housing of the docking station is pivotably mounted with a receiving tray to provide a number of positions for the notepad computer between an upright position and a low angle position. The more upright positions are useful when using the internal display of the notepad computer, particularly if an external keyboard and pointing device are used. The low angle position is useful when an external monitor is used and the overlay of the notepad computer is used for input. The receiving tray is removably mounted to the docking station and may be replaced with another receiving tray of a different size for use with a different notepad computer of a different size.

Abstract: A locking device for pivotally interconnecting a closure to a support and locking the closure in an open position relative to the support. The interlocking device interconnects the closure and support about a vertical axis, so that the closure can pivot about this axis and open and close relative to the support. The interlocking mechanism includes a locking mechanism having two engageable locking ratchet members. One ratchet member is fixedly coupled to the closure, and the second ratchet member is coupled to the support for movement along the vertical axis. The locking mechanism also has a spring which biases the ratchet members together into engagement with each other. Both ratchet members have compatible teeth with a ramping surface and a stopping surface for limiting the pivotal movement of the closure to a first direction and locking the closure in an open position. The releasing mechanism disengages the ratchet members, which allows the closure to be closed.

Abstract: A knee hinge with selectively limited motion which optionally limits an available flexion range of a user's knee to approximately 24 degrees so that a user will not fall should the user buckle at the knees. The hinge may be released to provide for a greater range of knee flexion which will allow a user to sit down in a conventional manner. The approximately 24 degree limit of the flexion range is automatically re-engaged when the user's knee is straightened. The hinge provides a spring mechanism for assisting weak knee muscles. The hinge also allows a small degree of knee hyperextension for the purpose of allowing the user to assume and maintain a safe standing position.

Abstract: A hinged strut construction has a pair of elongate, rigid strut members and a hinge structure connecting adjoining ends of the members to each other. A slide device releasably locks the strut members in an aligned, extended position. The slide device consists of an extendable and retractable locking pin which is axially movable on one strut member and which can be extended into or pulled out of an axial socket of the other member. A collar that is movable on one strut member connects with the locking pin to effect the movement of the pin.

Abstract: A playpen frame structure comprises a rectangular top rail frame supported by four upright primary legs. The top rail frame comprises four rails, each constituted by two bar members pivotally connected to a mid-joint which allows the bar members to be rotatable about pivots mounted on the mid-joint. A retaining member is provided on each of the mid-joint to form a releasable retaining engagement with the two bar members to maintain the bar members in the expanded condition. The retaining member comprises release button for breaking the retaining engagement. There is also provided a reinforcement structure on the lower ends of the primary legs to hold the legs in position and thus avoid accident collapses of the legs.

Abstract: A foldable frame assembly for a children's playpen, including an upper foldable rail mechanism composed of four upper rails each of which is foldable at a joint thereof, and a lower foldable rail mechanism composed of a chassis seat and four lower rails pivotally connected therewith in a radial pattern, wherein the upper rail mechanism is formed by simple components while the lower rail mechanism is provided with support-enhancing members to insure the safety in use.

Abstract: A joint has two inner and two outer shell halves which are mutually rotatably connected together by a central pivot bolt. A ring plate is coaxially rotatably inserted in a space formed between the inner shell half and the outer shell half of one side of the joint. The ring plate has an extended end on one side thereof with a stop, and is provided with a tensioning spring. Between the two outer shell halves in two rectangular slots is accommodated a locking pawl capable of radially moving into and out of the position notches defined on the curved peripheral edge of a disk portion formed by the two inner halves. The locking pawl can be pushed out of the position notch by a pull handle pivotally connected between the two shell halves, and the stop of the ring plate is able to be moved into the gap between the locking pawl and the notch by return tensioning spring force to prevent the locking pawl from entering into the position notch.

Abstract: A compact and lightweight knee joint for a prosthetic leg that can be locked or released with low operating forces comprises upper and lower members interconnected by a pin at a posterior location. A latch pivoted to one of the members for rotation about a vertical axis releasably locks into a recess in the other member to hold the joint in its extended position. The upper member has depending cheeks between which a head of the lower member is received. Adjoining horizontal faces of the upper and lower members are planar and a pad of elastomeric material attached to one of the planar surfaces serves as an extension stop buffer. The latch is blade-like and of bell-crank shape. It fits into slots in the anterior edge of each cheek and is pivoted in one of the slots with an anterior lever thereof spanning between the slots and with a latch head thereof fitting into the other slot. A cable release is fitted to the medial/lateral lever for release of the latch.

Abstract: The invention relates to a window cleaning device in which a cleaning member having a squeegee and scraper arranged along opposite longitudinal edges thereof is in the form of a U-shaped channel in which the handle and a retainer for the handle are pivotally arranged and compactly positioned, when not in use, for storage in a glove compartment or map pocket of an automobile.

Abstract: A bracket hinge and bracket members (10, 10') with a spring biased and movable locking member (30). The locking or latch member (30) has ear parts (38, 39) received in locking openings (25, 25') where wedging surfaces (40, 41) on the ear parts cooperate with complimentary surfaces (42, 42') on the bracket members for bringing the bracket members into a tight end-to-end alignment when the bracket members are in an extended position. When the locking member (30) is moved to an unlocking position, pivoting of the hinge about a pivot pin (32) automatically places locking pins (70, 71) in a circular shaped groove (55) on the locking member (30) to retain the locking member (30) in an unlocked position. In pivoting the hinge from an extended position to a folded position, longitudinal spring members (80, 81) are placed under tension over annular rollers (60, 61) so that the spring tension in a folded position assists in return of the hinge from a folded position to an extended position.

Abstract: A locking hinge assembly for mounting a visor on a helmet includes a cylindrical body which is fixed in an opening in the helmet and is loosely received through an aligned opening in the visor. The body has an annular detent flange with detent recesses therein in which are received detent studs carried by the visor for accommodating movement of the visor among a plurality of discrete detent positions. The locking assembly includes a shaft extending through an axial bore in the body and having an enlarged cam head at the outer end thereof. A cam disk is disposed between the head and the visor and has cam studs which cammingly engage cam recesses in the head. A spring washer is disposed between the cam disk and the visor for urging the detent studs into the recesses to resiliently hold the visor in each detent position and for urging the cam disk against the head.

Abstract: A portable, collapsible stretcher has frame poles, each of which have a medial joint which folds in one direction and two outer joints which fold in the opposite direction. A wedge is insertable into the medial joint to support the weight when the stretcher is extended. The outer joints have a locking mechanism which is operated by a linkage interconnecting the spreader bars and the folding legs. As the stretcher is extended, the outer joints are locked and the legs are unfolded from their normal position against the frame poles.

Abstract: An adjustable knuckle joint device for folding ladders includes in combination: a first coupling member having a first circular junction portion provided with an annular flange and a plurality of openings and bulges therein and a first elongate joint portion extending at an angle from the circular junction portion; a second coupling member having a second circular portion with a flat top surface being movably connected to and in bearing contact with the first coupling member, and a second elongate joint portion extending at an angle from the second circular junction portion; a straight axle fitting pivotally connecting the first and the second circular portions together; and a snap catch positioning assembly operatably fixed on the second elongate joint portion of the second coupling member in conjunction with the first circular junction portion. By manually operating the snap catch positioning assembly, a simple, secure and safe adjustment of both coupling members relative to one another results.

Abstract: A hinge fitting for a foldable ladder having two fitting parts connected to each other by a hollow hinge pin, an interlocking device with openings in the two fitting parts to the openings in one fitting part respectively there is associated one of each of positions of swing permitting interlocking, a guide pin mounted turnably and longitudinally displaceably in the hinge pin, at least one locking bolt spaced radially from the hinge pin and arranged parallel to it, the locking bolt being movable by means of a handle connecting it to the guide pin against the force of a return spring from an interlocking position (with the locking bolt engaging into aligned of the openings of the two fitting parts) into an unlocked position with the locking bolt being located outside the opening of the one fitting part, and a locking device which secures the guide pin towards the end of its displacement from the interlocking positions into the unlocked position and without impairing its turnability against return into the inter