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Class 280/284 - Rear forks


Subclass of Class 280 - Land vehicles
Definition: Frames in which the rear forks are yieldable.
No. of patents: 398
Last issue date: 04/24/2012


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NumberTitleIssue Date
4688816Multiple-wheel cycle
A multiple-wheel cycle includes a front wheel and two rear wheels respectively driven by two chainwheels formed on a driving shaft rotatably mounted on a bottom bush of a seat tube of the cycle frame so that the three wheels having their centers projectiv...
08/25/1987
4679811Bicycle rear suspension system
A rear wheel suspension system for bicycles having "on-demand" mode selection. The bicycle can be made "rigid" (no shock-absorbing movement of the rear wheel) or "sprung" (rear wheel movement) by means of a swing-arm wheel mount and an elastomer cylinder ...
07/14/1987
4673053Frame-rear suspension assembly for a motorcycle and the like
There is disclosed a frame-rear suspension assembly for a motorcycle and the like which comprises a frame including right and left tubular members, a rear fork pivotally connected to the right and left tubular members and a cross member made of a light al...
06/16/1987
4671525Elastic suspension for the rear wheels of motor vehicles
Elastic suspension for the rear wheels of motor vehicles, particularly of motorcycles, comprising two upwardly conveying suspension arms (3,4) which by their upper ends are pivotally connected at two different pivot points (103,104) to the vehicle frame (...
06/09/1987
4653604Suspension and or shock-absorbing device for a support arm of a vehicle wheel
Suspension and/or shock-absorber device of a rotary support arm of a vehicle wheel such as the rear wheel of a motorcycle, comprising disposed on one side of the support arm, a three arms lever mounted rotary-wise on a lever axle integral with the chassis...
03/31/1987
4650027Coupling device between a front suspension and a rear suspension of a vehicle
Coupling device between the suspension gear of a front wheel and the suspension gear of a rear wheel of a wheeled vehicle such as a motorcycle, in which the suspension deflections are transformed into substantially axial deplacements, comprising on each f...
03/17/1987
4621706Motorcycle drive wheel suspension system
A suspension system for the drive wheel of a motorcycle driven by a chain cooperating with sprockets on the engine and wheel shafts. The suspension system comprises a linkage arrangement associated with the swing arm, with the linkage parts positioned in ...
11/11/1986
4616729Transmission chain adjuster for motorcycles
An off the road motorcycle having a balloon tired rear wheel that is suspended by a trailing arm and which is driven by a pair of flexible transmitters, one positioned closer to the motorcycle center line than the other so as to provide clearance for the ...
10/14/1986
4596302Rear suspension mechanism for motorcycle
Herein disclosed is a rear suspension mechanism for a motorcycle, in which a swing arm having its one end hinged to a body frame is connected to the body frame in the vicinity of the hinged portion of the swing arm through a bell crank having an eccentric...
06/24/1986
4588196Torsion suspension system for motorcycles having improved center of gravity
A motorcycle having improved center of gravity is disclosed. The motorcycle has a torsion suspension system and a frame having front and rear wheels with a motor located in the frame and a driver's seat mounted on an upper supporting structure of the fram...
05/13/1986
4582343Lightweight rear-wheel bicycle suspension
A lightweight rear-wheel suspension for a bicycle which includes a triangulated main frame, a rear wheel support frame such as a rear fork rotatably supporting a rear wheel and mounted to the main frame so that it pivots about the foot crank rotational ax...
04/15/1986
4574909Suspension system for the rear wheel of a motorcycle
In an elastic suspension system provided with a shock absorber (6, 106) for the rear wheel (5) of a motorcycle, the shock absorber (6, 106) is pivotally connected by its lower end to a shock absorber-supporting bell crank (11) fulcrumed about the rear whe...
03/11/1986
4561519Rear suspension for a motorcycle
A suspension system for the rear wheel of a motorcycle employing a transversely mounted cushion member located below the rear wheel support frame of the suspension. Pantograph type linkage is employed to translate vertical relative motion of the rear whee...
12/31/1985
4558761Motorcycle drive wheel suspension system
A suspension system for the drive wheel of a motorcycle driven by a chain cooperating with sprockets on the engine and wheel shafts. The suspension system comprises a linkage arrangement associated with the swing arm, with the linkage parts positioned in ...
12/17/1985
4556119Motorcycle structure
A motorcycle frame and suspension system employing a backbone frame member extending rearwardly over an engine and then downwardly where it is associated with an inverted U-shaped center frame. Two pivot mechanisms for a rear fork are positioned in line w...
12/03/1985
4544044Motorcycle drive wheel suspension system
A suspension system for the drive wheel of a motorcycle driven by a chain cooperating with sprockets on the engine and wheel shafts. The suspension system comprises a linkage arrangement associated with the swing arm, with the linkage parts positioned in ...
10/01/1985
4540193Rear motorcycle fork
A rear fork for a motorcycle having hollow rear arms and metal end pieces for receiving an axle. The rear fork can be made of integrally molded fiber reinforced plastic. The metal end piece conforms to the configuration of the end of the arm and has locat...
09/10/1985
4529056Mechanism for the spring-cushioning of a vehicle wheel
Spring-cushioning mechanism for a wheel of a vehicle having a frame, said wheel being mounted on an arm which is swingingly mounted on the frame of the vehicle. A lever is mounted adjacent one end thereof to the frame of the vehicle: a rigid strut extends...
07/16/1985
4523659Rear suspension for a motorcycle
A rear suspension for a motorcycle having progressive linkage for a cushion. A swing arm support linkage is defined by an arm and tension rods extending between the body frame and the rear wheel support frame. A pivotal connection on the swing arm support...
06/18/1985
4520892Two-wheeled vehicle with offset wheel
A two-wheeled vehicle comprising a vehicular body inclusive structure having the center of gravity thereof deviated in either transverse direction from the vehicle center line, a steering system inclusive structure transversely turnably connected with the...
06/04/1985
4519472Motorcycle
There is disclosed a method of vehicle construction for improving the rate of production of two assemblies of a motorcycle. The two assemblies can be made simultaneously on separate assembly lines and connected together by placing the power unit in fittin...
05/28/1985
4515236Rear suspension for motorcycles
An improved linkage type suspension arrangement for the rear wheel of a motorcycle that permits a large suspension travel and effective damping without transmission of high loads to the vehicle frame. A linkage system is employed including a bellcrank and...
05/07/1985
4511013Rear suspension system for motorcycles
A rear suspension system mounted on a motorcycle having a body frame, a rear wheel and a rear wheel supporting member which is pivotable together with a vertical movement of the rear wheel. The system comprises a pivotal damper disposed on the body frame ...
04/16/1985
4506755Rear suspension system for motorcycles
A rear suspension system in a motorcycle having a body frame and a rear wheel. The rear suspension system comprises a rear wheel supporting member swingably pivoted at its front end to the body frame and pivotably supporting at its rear end the rear wheel...
03/26/1985
4505492Rear suspension system for motorcycles
A rear suspension system for a motorcycle having a progressive damping characteristic. The rear suspension system includes a rear wheel support member having a truss structure including a front corner portion pivotally supported on a motorcycle body frame...
03/19/1985
4489803Rear suspension system for motorcycles
A rear suspension system for motorcycles in which a front end of a rear wheel supporting member having the rear wheel supported thereby is connected to a chassis frame in such a manner as to permit oscillation thereof in an upward or downward direction, a...
12/25/1984
4485885Rear suspension system for two-wheeled vehicles
A rear suspension system in a two-wheeled vehicle having a body frame, a front wheel and a rear wheel. The rear suspension system comprises a rear fork member having a front end pivotably connected to the body frame and a rear end which rotatably supports...
12/04/1984
4484652Suspension system
A motorcycle frame and suspension system employing a backbone frame member extending rearwardly over an engine and then downwardly where it is associated with an inverted U-shaped center frame. Two pivot mechanisms for a rear fork are positioned in line w...
11/27/1984
4465156Motorcycle suspension system
An improved motorcycle suspension system comprising a substantially straight torsion bar having a first end and a second end; a rear wheel axle support attached rotatably and pivotally to the motorcycle frame; means for holding the first end of the torsio...
08/14/1984
4463964Rear suspension system for motor vehicles
A rear suspension system for motor vehicles. Both leg ends of a gate-shaped swing arm which at its free end supports the central part of a rear axle are pivotably secured to a vehicle body frame, a tension rod is provided between the lower end of a downwa...
08/07/1984
4463824Drive wheel suspension system for motorcycle
The application discloses a parallelogram type of drive wheel suspension system for a motorcycle and employs only a single swing arm at each side of the drive wheel, with the swing arms being torsionally interconnected through the axle structure of the wh...
08/07/1984
4457393Suspension device for motorcycle
Disclosed are suspension devices for motorcycles, in which the rear wheel is rotatively supported by rear ends of right and left side swing arms front ends of which are pivotally connected to rear low-portion of the vehicle frame, one end of a link lever ...
07/03/1984
4451065Torsion suspension system for motorcycles
A suspension system for motorcycles having a frame and a motor and a swing arm pivotally mounted or attached to one of the motor and the frame. The swing arm supports a wheel in a rotatable position and permits the wheel to be displaced in a generally ver...
05/29/1984
4440413Rear wheel suspension for a motorcycle
An improved rear wheel suspension for a motorcycle is provided which includes a body frame, a rear wheel support frame such as a rear fork pivotally mounted on the body frame for upward and downward movement relative thereto and rotatably supporting a rea...
04/03/1984
4436174Vehicular power unit supporting device
In a vehicle wherein a rear wheel is supported by a power unit which comprises an integral combination of an engine and a transmission case incorporating a transmission mechanism and which is suspended from a rear part of a vehicle body frame through a da...
03/13/1984
4434868Rear wheel control unit for two-wheeled vehicles with universal drive mechanism
A rear wheel control unit for a two-wheeled vehicle with universal drive mechanism, such as a motorcycle, is disclosed. The rear wheel control unit comprises an axle housing for accommodating a drive unit of the universal drive mechanism of the two-wheele...
03/06/1984
4433747Motorcycle with improved rear suspension
The invention relates to motorcycles of the kind comprising a rear wheel axis carried by at least one suspension arm mounted for oscillations about a suspension travel axis, a resilient suspension member acting between a frame and the suspension arm, and ...
02/28/1984
4429760Rear-wheel suspension device for a tricycle vehicle
A rear-wheel suspension device on a tricycle vehicle having front and rear vehicle portions interconnected by a rolling joint having a sleeve bearing. To provide increased stability between a pair of rear wheels of the tricycle vehicle, a casing of the ro...
02/07/1984
4422661Height adjusting system for motorcycle
A height adjusting system for a motorcycle body 1 comprises front and rear telescopic suspensions 2, 6 and 3, 7 respectively connected to the axles of the two wheels 4, 5 and a high pressure air tank 18 connected to the two suspensions and pressurized by ...
12/27/1983
4421337Bicycle with resiliently yieldable wheel supports
A bicycle and method of making same are provided wherein such bicycle has an improved system associated with its front and/or rear wheel which in each instance allows large and abrupt vertical movement of the wheel associated therewith while allowing the ...
12/20/1983
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