Land vehicles – Wheeled – Occupant propelled type
Patent
1991-07-11
1995-05-30
Hill, Mitchell J.
Land vehicles
Wheeled
Occupant propelled type
280293, B62H 112
Patent
active
054195756
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a stabiliser system for a single track wheeled vehicle, particularly bicycles which are powered by a rider.
The rider of a bicycle experiences frequent stops and starts in urban areas due to road intersections, slow moving traffic and traffic congestion, road works and other obstructions. These conditions are a common occurrence for cyclists in towns and in urban areas and can result in potentially dangerous situations where the cyclist has to stop precipitately and may lose his or her balance in the process.
In such traffic conditions, the cyclist has to put one or both feet on the ground at each stop and in many instances may have to dismount partially. The frequent and often abrupt stops and starts in traffic are highly inconvenient to the cyclist. They may also be potentially dangerous through loss of balance, impatient behaviour due to frustration and the like, particularly when the traffic includes heavy trucks.
The design of the pedal bicycle and the physical dimensions of the rider often result in saddle seats which are set either too low for maintaining efficient pedal pressure or too high for remaining in the saddle when at the halt. This can lead to frequent dismounting and remounting.
It is object of the present invention to provide a stabilising system for a bicycle which enables the rider to bring the bicycle to a halt, without having to dismount.
It is a further object of the invention to provide such a stabilising system which may be in the form of an attachment for existing bicycles or may form part of the bicycle as manufactured.
According to one aspect of the invention, there is provided a stabiliser system for a single track wheeled vehicle comprising: an arm having one end pivotally connected at or near a wheel spindle of the vehicle, the arm having a degree of compressibility in the axial direction; a cross shaft connected to the other end of the arm; a pair of stabilisers mounted on the cross shaft; a wheel engaging element mounted on the cross shaft between the stabilisers; and means for moving the arm between a raised position in which stabilisers are clear of the ground, and a lowered position in which the stabilisers contact the ground and the vehicle wheel is raised clear of the ground and engages the engaging element. The arm, cross shaft and wheels may therefore be considered to constitute a stand. Preferably, the vehicle wheel is rotatable when the stabilisers are stationary.
According to another aspect of the invention, a stabiliser system for a bicycle (which may be a pedal cycle, a motor-assisted pedal cycle or a motorcycle) comprises a compressible arm which is pivoted at one end to the frame of the bicycle at or adjacent the rear wheel axis for movement in a plane generally parallel to the plane of the rear wheel a roller carried at the other end of the arm and having a circumferential surface engageable with the running surface of the tire and flanges snugly engageable with the opposite sides of the tire, stabilisers also carried at the said other end of the arm and engageable with the ground on opposite sides of the rear wheel, and means for moving the arm between a raised position in which the stabilisers are clear of the ground and a lowered position in which the stabilisers contact the ground and the rear wheel is raised clear of the ground and engages the roller.
Preferably the stabilisers are wheels and the system includes a cross shaft carried by the lower end of the arm, the roller and the stabilisers being mounted on the cross shaft.
An important feature of the invention is that a large part of the weight of the rider is transferred to the ground through the wheel of the vehicle and hence to the stabilisers. This means that the arm which carries the stabilisers need carry only a very small part of the weight of the rider and can therefore be of much lighter construction than would be the case if the whole of the weight normally transferred to the ground through the wheel was passed to the stabiliser arm as in the case of some pr
REFERENCES:
patent: 502298 (1893-08-01), Hyams
patent: 1107427 (1914-08-01), Kasdorff
patent: 1154089 (1915-09-01), Bryant
patent: 1251684 (1918-01-01), Murray
patent: 3877727 (1975-04-01), Johannsen
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