Abstract: A body structure for a motorcycle with a front wheel and a rear wheel, including a body frame assembly having an engine mounted thereon and having vertically swingably joined thereto a front leading arm for supporting the front wheel and a rear trailing arm for supporting the rear wheel. The front leading arm as viewed from the side thereof is curved upwardly in the direction of a steering axis of the front wheel. The body frame assembly is shaped in a concave form having front standing portions and rear standing portions to thereby surround the engine. The engine is a V-type with at least a pair of internal combustion cylinders substantially vertically arranged to be respectively forwardly and rearwardly inclined, and may be secured at a front part thereof to the front standing portions of the body frame assembly and at a rear part thereof to the rear standing portions of the body frame assembly.

Abstract: A motorcycle front fork assembly comprises substantially parallel fork legs (15), each leg being connected to an articulated linkage (16). The articulated linkage comprises a telescopic member (19) concentric with or adjacent to each fork leg (15) and axially movable substantially in the plane of the fork legs and a suspension link (17) having a first end for supporting a wheel spindle (24), a second end (22), and being pivotally connected between the two ends (22, 24) to the telescopic member (19). So that trail variations may be kept to the minimum, restraining means pivotally connect the second end (22) of the suspension link (17) to the leg (15) and allow translational movement of the second end (22) during axial movement of the telescopic member (19) in response to movement of the said first end (24). By simple experiment suitable dimensions may be determined to maintain trail variation substantially constant for any steering variation.

Abstract: A suspension system for the front wheel of a motorcycle having a frame assembly for supporting the suspension system, which includes a pair of upright bars having upper and lower ends and adapted to rotatably mount a wheel between their lower ends, a brace assembly is attached to said bars adjacent the upper ends thereof to hold the bars in spaced and parallel position, a parallelogram mechanism is affixed to the cycle frame and to the pair of upright bars to control up and down movement and to allow rotary movement of said pair of bars, a pair of semi-handlebars are movably mounted on the cycle frame, and a steering linkage operatively connects each semi-handlebar with the bar pair, both linkages pivot about a common pivot pin whereby the pair of bars may be rotated by movement of either semi-handlebar independent of the other semi-handlebar.

Abstract: A shock absorbing mechanism for wheels for absorbing horizontally-applied shock loads experienced by the wheel whereupon the axle and hub of the wheel are permitted to move rearwardly, or "slide", upon the application of a relatively substantial horizontal shock force. The spring rate, stiffness and travel are all adjustable. Means are provided for anchoring the stationary portion of the wheel braking mechanism to a stationary portion of the motorcycle and, should it be desired to do so, for bypassing the shock absorbing mechanism of the present invention to restore the axle and wheel combination to the former function non-shock absorbing relationship.

Abstract: An oscillating supporting arm assembly for the driving wheel of a motorcycle, includes an arm mounted to oscillate angularly about a connecting shaft of the motorcycle and cooperating with a suspension assembly between the arm and motorcycle, the wheel being removably fixed to a supporting shaft on one side of the free end of the supporting arm, the supporting shaft extending through the arm on two bearings, a wheel driving pinion is fixed to the supporting shaft, on the side of the arm opposite to the wheel and is driven by a chain mechanically connected to the driving assembly of the motorcycle, the supporting arm having the configuration of a U with two legs between which the rim and the tire of the rear wheel are located, one of the legs having hinge connections which cooperate with the connecting shaft of the motorcycle, the wheel has its median plane extending at substantially equal distances from the two hinge connections of the supporting arm, the wheel is rigidly connected to a brake disc cooperating

Abstract: A front wheel suspension for motorcycles including a pair of first linkages each having link members for interconnecting an upper fork pivotably supported on a motorcycle body and a lower fork supporting a front wheel thereon, and a pair of second linkages for restraining the deformation of the first linkages through a damper, the upper fork having a hollow formed therein in which at least a part of the second linkage is accommodated. The suspension has the moment of inertia relative to the handlebar substantially reduced and has a simplified and favorable appearance.

Abstract: A front suspension system for a motorcycle, including an upper fork member supported by a vehicle body frame, a lower fork member which supports a front wheel and a link mechanism connecting between the upper and lower fork members. The system includes a pivotal damper which provides a pivotal reaction force proportional to a pivoted amount thereof in operative cooperation with the link mechanism. The pivotal damper is disposed in the interior of the upper fork member to thereby attain simplification of the construction, reduction of the number of parts and improvement of the aesthetic appeal.

Abstract: A link type front wheel suspension system comprising an upper fork, a lower fork, links connecting between the upper fork and the lower fork, a shock absorber for a front wheel, and a transmission system for transmitting a load received by the front wheel to the shock absorber through the lower fork and the connecting links. The shock absorber of the suspension system is supported by a vehicle body frame and the transmission of load to the shock absorber is performed through a fluid circuit, whereby reduction in weight of the system and reduction in the moment of inertia in the steering operation is attained.

Abstract: A front wheel suspension system for motorcycles which cooperates with a front wheel suspension including an upper fork supported by a motorcycle frame and a lower fork supporting the front wheel. The system includes a rotary lever type damper operatively coupled to the lower fork. The rotary lever type damper is disposed between a pair of side members comprising the upper fork, thus reducing unsprung weight.

Abstract: The invention consists of a device which can be mounted on a conventional wheelchair to provide shock absorbing qualities to the wheelchair. Each wheel on the wheelchair is removed from its standard mounting position with a shock absorbing device of this invention being used to mount each wheel in a new position spaced longitudinally from its standard position. The device of the invention has a lever with one hole in front which is attached to the axle of the wheelchair by means of a bolt which passes through the hole in the axle and a nut attached to the end of the bolt. Another hole is located centrally in the lever for mounting of the wheel by means of a second bolt and a second nut. At the opposite end of the lever a hole is provided through which a spring is attached. The opposite end of the spring is attached to a rigid member of the wheelchair. In this manner, the weight of the chair and its occupant is supported by the spring tension of the spring.

Abstract: The suspension comprises a steering framework mounted on the frame of the vehicle. An arch-shaped pivotal suspension arm carries at one end the spindle of the front wheel of the vehicle and extends around the front wheel. The pivotal arm is pivoted to the steering framework. A shock-absorbing system having a variable flexibility comprises at least one shock-absorber. The shock-absorber is connected to a pivotally mounted link to damp movements of the link. The link is connected to the pivotal arm by a hydraulic or mechanical transmission.

Abstract: A front-wheel suspension is disclosed, especially for two-wheeled vehicles such as motor-assisted bicycles and motor-scooters, in which the usual swinging front fork is replaced by a single goose-necked stiff arm capable of overhangingly carrying the vehicle front wheel and pivotally connected, at its bottom end, to the wheel axle by the intermediary of a swingable link. A springing and shock-absorbing telescopable member is pivotally connected, at its top, to an intermediate portion of said arm and, at its bottom, to the wheel axle. A brake device is rigidly connected to the shock-assembly member. The construction is much simplified over the prior art and the costs are significantly reduced: a favorable distribution of the stresses throughout the entire system is also achieved.

Abstract: A bicycle with a frame suspended on the wheels by telescoping shock absorbers that permit large vertical movements of the wheels when they hit bumps without producing large vertical movements of the bicycle frame, so that pedaling can continue uninterrupted in traversing rough terrain.