Abstract: A foldable bicycle frame includes a head tube, a downtube unit, a chain stay unit, a telescopic seat unit, and a seat stay unit. The head tube is adapted to be coupled with a front fork for carrying a front bicycle wheel. The downtube unit has a front end connected to the head tube, and a rear end. The chain stay unit has a horizontal front end portion that is connected foldably to the rear end of the downtube unit and that is adapted to be mounted with a crank arm assembly, an inclined vertical rear end portion, and a middle portion that is between the front and rear end portions and that is provided with means for carrying a rear bicycle wheel thereon. The telescopic seat unit has a top end adapted to be mounted with a bicycle seat thereon and a bottom end connected pivotally to the front end portion of the chain stay unit. The seat stay unit has a front end pivoted to the top end of the seat unit and a rear end pivoted to the rear end portion of the chain stay unit.

Abstract: A screw member is screwed into a spool which is axially movably inserted into a housing. The opening of the throttling portion of a variable throttle valve is varied according to the axial shifting of the spool according to the rotation of the screw member. The centerline of the screw member is eccentric to the centerline of the spool. The eccentricity prevents the spool from rotating together with the screw member.

Abstract: A hood control apparatus comprises at least one counterbalancing spring engaged between a forward tilt hood and a top surface radiator frame mounted under the hood. The spring is chosen to have a spring rate such that, when the hood is opened, the spring supports the hood in an open equilibrium position less than fully open. A locking latch device is provided for latching the hood in the open position against unintended closure thereof.

Abstract: A free-style bicycle is modified to accommodate a threadless headset by constructing the preloading assembly employed with a threadless headset as a cable routing assembly so that at least the inextensible core of the front brake cable is routed down through the preloading and cable routing assembly and through the hollow steering tube of a bicycle. The preloading assembly has a longitudinal passageway defined therethrough. The passageway may be formed by utilizing a hollow draw bolt that permits the passage of the core of the front brake cable therethrough. In this case the sheath of the front brake cable is divided into upper and lower segments. The upper sheath segment extends between the front brake control and the top of the preloading and cable routing assembly, while the lower sheath segment extends from a lower steering tube end plug to the front wheel brake.

Abstract: An arrangement of circuit casings and circuit boards in a motorized power steering device including a drive circuit casing, a control circuit casing and a gear casing connected to the drive circuit casing. The drive circuit casing includes a drive circuit board provided thereon with a drive circuit whereas the control circuit casing includes a control circuit board provided thereon with a control circuit for outputting a control signal to the drive circuit. An electric motor is attached to the drive circuit casing such that the drive circuit casing is interposed between the gear casing and the electric motor.

Abstract: A device for improving the appearance of a wheelchair having A body shell attachable to the wheelchair frame to simulate the appearance of an automotive vehicle or the like and having portions foldable to allow a patient to enter and use the wheelchair.

Abstract: A bicycle towable collapsible cart comprises a framework engageable to a rear bike wheel hub and expandable to stretch a fabric basket into container form. The framework engages removable wheels and, when the cart is in its collapsed state, a small package for storage or transport is formed.

Abstract: An electrical auxiliary drive for a bicycle includes an inverted U-shaped bracket having a top wall disposed above a rear wheel of the bicycle and two side walls each fixedly mounted on a respective seat stay of the bicycle and each located adjacent to the rear wheel. Each of the two side walls of the bracket has an arcuate slot defined therein. Two motors are each mounted on a respective side wall of the bracket and each have a driving axle rotatably mounted thereon and slidably extending through an associated arcuate slot. A driven axle is mounted between the top wall of the bracket and the rear wheel and has two end portions each fixedly mounted on the driving axle of a respective motor. A driving wheel is fixedly mounted around the driven axle and detachably engages with the rear wheel.

Abstract: A steering device for an amusement car including a drive wheel mounted off-center on a wheel shaft to provide a rotation force for quick and automatic recovery of the steering device to steer the car away from an obstacle that is encountered during use. The drive wheel being mounted to the wheel shaft in an area bounded by a distance equal to the radius of the drive wheel and a distance equal to the diameter of the drive wheel, both measured from the center of the wheel shaft.

Abstract: A folding bicycle is formed with a front frame and a rear frame connected rotatably with one another by a joint and capable of being completely separated and with a suspension system including a flexible element extending between a sprocket mounted on the second frame and the first frame and pretensioned by a spring which is engaged with the joint.

Abstract: A parallel vehicle includes three main control systems. The first controls the position and angle of the two parallel wheels relative to a fixed chassis, enabling the wheels to be moved outwardly and inwardly and the camber varied for greater stability, aerodynamic effect, or turning. This first system may be mechanically or hydraulically actuated, but preferably is controlled by a pair of control members whose position relative to the chassis corresponds to the desired position of the wheels relative to the chassis in order to provide an intuitive control mechanism. The second system is the propulsion system which may, for example, take the form of a derailleur drive of the type used in bicycles, but with power from the propulsion system being transmitted to the wheels via a rotating cable and individual gearboxes for each wheel which permit the direction of the wheels to be reversed.

Abstract: The alignment guide assembly includes an alignment guide that is movable between an operative and an inoperative position on the tongue of a trailer without removing any of its parts. The alignment guide assembly also includes a stop bracket on the trailer hitch of a tow vehicle, and in its operative position, the alignment guide is capable of longitudinally aligning a hitch ball on the tow vehicle with a socket on the tongue of the trailer, of locating the hitch ball in vertical alignment with the socket, and of stopping downward movement of the trailer tongue when the socket is in position to be locked to the hitch ball.

Abstract: In an electric power steering apparatus, a control unit is divided into two units. A first control unit which determines a first motor current target value is constructed only by hardware. A second control unit includes a fail-safe unit not required to respond quickly. The second control unit determines a second motor current target value, and outputs, to the first control unit, a signal for changing the first motor current target value on the basis of the first motor current target value, the second motor current target value, a driving current, and a signal indicative of a condition of a vehicle. By sharing of roles in this way, it is possible to enhance the responsivity of the apparatus to a steering operation and to realize the reduction in production costs.

Abstract: The invention relates to a wheelchair having a frame, a seat, a backrest, wheels and attachments fixed to the frame, characterized in that colored cladding parts can be detachably fixed, particularly by plug or clamp connections, to substantially any part or component of the wheelchair. This makes it possible in a simple and inexpensive manner to bring about a variable color design for the overall wheelchair. The cladding parts are preferably constructed as flat plastic parts which can be locked by means of projections formed in or on the cladding parts into corresponding recesses in the wheelchair or can be slid into longitudinal grooves in the frame of the wheelchair.

Abstract: This improvement is for a hand operated wheel chair or exercise machine. The machine uses two racks to operate two one way clutches to furnish forward motion from both the forward and backward strokes of the input lever arm. The mechanical advantage of the input lever arm is readily changeable to affect the overall gear ratio of the drive. Steering is accomplished by turning a wheel on the lever arm. The control is similar to that on a wheel controlled airplane.

Abstract: An automatic rear wheel self-centering device for four-wheel steering vehicles automatically performs the rear wheel self-centering operation when the steering mode of the vehicle returns from another steering mode to the standard steering mode. The device has a branch conduit branched from a conduit leading from the steering unit to the steering mode selection valve. A conduit control valve is mounted to the branch conduit and is changeable between a neutral position blocking the branch conduit, a first position connecting the branch conduit to one side chamber of the rear wheel steering cylinder and a second position connecting the branch conduit to the other side chamber of the cylinder. The spool of the conduit control valve moves synchronous with a linear movement of the piston of the rear wheel steering cylinder, thereby changing the position of the conduit control valve between the above three positions.

Abstract: An improved foot system for a jointed leg type walking robot capable of more stably walking on both even and uneven ground surfaces by providing a jointed leg type foot system with a front toe cylinder and a rear toe cylinder each communicated with a front toe assembly and a rear toe assembly. In addition, it is capable of more stably landing on uneven ground surface and absorbing landing impacts more efficiently, which includes a lower foot body; an upper foot body mounted on the top of said lower foot body; a gas accumulator formed within the lower foot body; a front toe assembly pivotally attached to a predetermined portion of the lower foot body; and a rear toe assembly pivotally attached to a predetermined portion of the lower foot body.

Abstract: A collapsible wheelchair (10) with two lateral supports (12, 13) on which respectively a drive wheel (18, 19) and respectively a running wheel (20, 21) are fastened and which are rigidly connected by a main transverse support (34) and an auxiliary transverse support (32). The former is constituted by two legs (38, 39) connected a hinge joint, which can be arrested on each other by an arresting device. The latter has an arresting protrusion (56) hinged on one leg (38). The arresting protrusion runs up on the stop face (62) respectively located opposite it, which is a section of a stop area (64) formed on the other leg (39). At least one of the legs (38, 39) can be advanced in the direction toward the longitudinal center surface of the collapsible wheelchair (10) by an advancement device.

Abstract: A motor vehicle power steering gear has a proportional control valve with first and second valve members connected by a torsion spring and defining a center position with zero torque in the torsion spring. Electromagnetic apparatus for varying the magnitude of the effective restoring torque of the torsion spring comprises a stationary exciting coil, a circular permanent magnet member connected to one of the first and second valve members for rotation therewith and comprising a plurality (n) of permanent magnets of alternating radial polarity, and a pole piece connected to the other of the first and second valve members for rotation therewith, magnetically coupled to the exciting coil, and having a pair of magnetic flux conducting rings each defining a plurality (n/2) of pole teeth facing the permanent magnet member and opposing the pole teeth of the other to define pole tooth pairs each having a region of circumferential overlap.

Abstract: A motorcycle rear wheel frame is pivotally mounted to the motorcycle main frame. A shaft is positioned on a pivot axis of the rear wheel frame and the main frame of the motorcycle. Rigidly attached to the shaft is one end of a leaf spring. The other end of the leaf spring contacts a transverse cross member of the swing arm so that pivotal movement of said rear frame with respect to the main frame is primarily absorbed by the leaf spring.