Deformable speed hump
First Claim
1. A road-traffic speed-control device which is locatable in a roadway, said device comprising a speed hump formed from a resiliently-deformable material and having at least one of a perforation, an aperture and a valve means disposed therein so that air within said device is in restricted communication with a surrounding atmosphere to permit deflation of said device by a passage of a vehicle over said device at an intended speed limit of said vehicle in said roadway, but not at speeds exceeding said speed limit, and is sufficiently resilient to reinflate itself automatically after passage of said vehicle.
1 Assignment
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Accused Products
Abstract
A road traffic speed control device which is located in a roadway, is formed of resiliently deformable material and is deflatable by the passage of a vehicle thereover at the intended speed limit of the vehicle in the roadway, in use. The device may be formed from an extruded or compressed partially recyclable rubber compound.
24 Citations
16 Claims
- 1. A road-traffic speed-control device which is locatable in a roadway, said device comprising a speed hump formed from a resiliently-deformable material and having at least one of a perforation, an aperture and a valve means disposed therein so that air within said device is in restricted communication with a surrounding atmosphere to permit deflation of said device by a passage of a vehicle over said device at an intended speed limit of said vehicle in said roadway, but not at speeds exceeding said speed limit, and is sufficiently resilient to reinflate itself automatically after passage of said vehicle.
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13. A road-traffic speed-control device locatable on a roadway, comprising a resiliently-deformable speed hump having an interior portion for holding a fluid, and at least one of a perforation formed in the speed hump, an aperture formed in the speed hump, and a valve mounted on the speed hump, wherein:
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the at least one of a perforation, an aperture, and a valve permits the fluid to flow out of the interior portion when a pressure of the fluid is below a predetermined value corresponding to a pressure of the fluid when a vehicle passes over the speed hump at a predetermined speed, so that the speed hump deflates when the vehicle passes over the speed hump at a speed below the predetermined speed; and
the at least one of a perforation, an aperture, and a valve prevents the fluid from flowing out of the interior portion when a pressure of the fluid is approximately equal to or greater than the predetermined value so that the speed hump does not deflate when the vehicle passes over the speed hump at a speed approximately equal to or above the predetermined speed. - View Dependent Claims (14)
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15. A road-traffic speed-control device locatable on a roadway, comprising a speed hump resiliently deformable between an inflated state and a deformed state, and at least one of a perforation formed in the speed hump, an aperture formed in the speed hump, and a valve mounted on the speed hump, wherein:
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the at least one of a perforation, an aperture, and a valve permits a fluid located inside the speed hump to pass through the at least one of a perforation, an aperture, and a valve to an environment outside the speed hump when the speed hump is subject to an impact load below a predetermined level so that the speed hump deforms in response to the impact load below the predetermined level; and
the at least one of a perforation, an aperture, and a valve prevents the fluid located inside the speed hump to pass through the at least one of a perforation, an aperture, and a valve when the speed hump is subject to an impact load approximately equal to or greater than the predetermined level so that the speed hump remains in the inflated state when subject to the impact load approximately equal to or greater than the predetermined value. - View Dependent Claims (16)
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Specification