Device reducing speed of vehicles travelling on a roadway
First Claim
1. A device for reducing speed of a vehicle travelling on a roadway, comprising a strip made of a flexible material, having a plurality of hollow fluid-filled chambers interconnected by a calibrated conduit for controlled passage of fluid from a chamber on which a wheel of the vehicle is located to at least one other chamber,the fluid which fills the plurality of chambers being a non-Newtonian fluid having a viscosity which varies proportional to a stress gradient applied thereto,such that a resistance offered by the strip to deformation by the wheel of the vehicle varies depending on the speed of impact, so that if the vehicle travels at a low speed the fluid has a lower viscosity and the strip has a lower resistance to deformation, and as the speed of the vehicle increases the viscosity of the fluid is higher, increasing resistance to deformation, thus forming a more rigid obstacle to the passage of the vehicle.
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Accused Products
Abstract
The invention relates to a device reducing speed of vehicles travelling on a roadway, formed by at least one strip of flexible material, rubber or other similar material, made up of several hollow chambers which are interconnected by a calibrated conduit which enables the controlled passage of the fluid filling said chambers from that flattened by the wheel of the vehicle towards the adjacent chamber. The fluid contained therein is water, or a non-Newtonian fluid offering the higher viscosity, the higher the stress gradient applied thereto is, the fluid itself acting as means for controlling the resistance to deformation of the strip as the higher is the speed of impact of the vehicle in said strip.
13 Citations
7 Claims
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1. A device for reducing speed of a vehicle travelling on a roadway, comprising a strip made of a flexible material, having a plurality of hollow fluid-filled chambers interconnected by a calibrated conduit for controlled passage of fluid from a chamber on which a wheel of the vehicle is located to at least one other chamber,
the fluid which fills the plurality of chambers being a non-Newtonian fluid having a viscosity which varies proportional to a stress gradient applied thereto, such that a resistance offered by the strip to deformation by the wheel of the vehicle varies depending on the speed of impact, so that if the vehicle travels at a low speed the fluid has a lower viscosity and the strip has a lower resistance to deformation, and as the speed of the vehicle increases the viscosity of the fluid is higher, increasing resistance to deformation, thus forming a more rigid obstacle to the passage of the vehicle.
Specification