Fence
Patent 5664905 Issued on September 9, 1997. Estimated Expiration Date: 
April 28, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 28, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3258250 3388892 3499630 3567184 Post for a guard rail Guard rail construction Breakaway timber support poles Break-away fence for horse race tracks Collapsible signalling post Breakaway connection for post Patent #: 5214886 InventorsAssigneeApplicationNo. 382014 filed on 04/28/1995US Classes:404/6, TRAFFIC STEERING DEVICE OR BARRIER248/548, WITH COMPONENT FRANGIBLE OR DEFORMABLE ON IMPACT OR OVERLOAD248/900, MOVABLE OR DISENGAGEABLE ON IMPACT OR OVERLOAD256/13.1HIGHWAY GUARDExaminersPrimary: Buiz, MichaelAssistant: Lisehora, James A. Attorney, Agent or FirmForeign Patent References
International ClassE01F 015/00Foreign Application Priority Data1992-08-10 GBAbstractA crash barrier including a post secured to a base at its lower end, the post having a front face to which one or more rails are secured, the post also having two side faces and a rear face. The rear face of the post is formed with a horizontally extending notch having upper and lower surfaces. When an impact load is transmitted to the front face of the post, the post is caused to distort in a region including the notch so that the upper and lower surfaces of the notch close towards one another prior to any fracture at or adjacent the front face of the post or at or adjacent its lower end.Field of SearchTRAFFIC STEERING DEVICE OR BARRIERCurb TRAFFIC DIRECTOR Yielding Distinct biasing means recessed in roadway MISCELLANEOUS HIGHWAY GUARD EARTH, STONE, PLASTIC, AND WOODEN INCLUDING FRANGIBLE COMPONENT FRANGIBLE SECTION OR MEANS WITH COMPONENT FRANGIBLE OR DEFORMABLE ON IMPACT OR OVERLOAD MOVABLE OR DISENGAGEABLE ON IMPACT OR OVERLOAD | |
