Pre-cast rectangular cobblestone
October 7, 2017. 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 1479647 Paving stone, process for manufacturing same and device for carrying out the manufacturing process Paving stone Set of paving stones, particularly set of concrete paving stones Paving stone set Compound pavement stone Paving stone construction set Groundcovering element, method for its manufacture and method for the manufacture of a mould to be applied with the manufacturing method Plate-shaped paving stone, in particular made of concrete Retaining wall system InventorApplicationNo. 946075 filed on 10/07/1997US Classes:52/589.1, Having integral key52/591.1, Key on angularly related edges or faces52/591.3, Key designed for four direction lock52/592.2, Key designed for four direction lock404/41InterfittingExaminersPrimary: Chilcot, RichardAttorney, Agent or FirmForeign Patent References
International ClassE01C 005/00AbstractA pre-cast cobblestone (10) is comprised of a concrete body (11) of substantially rectangular outline and having a top and bottom wall (13-14) and opposed side walls (15). The top wall (13) is embossed and the side walls (15) have longitudinally shaped flat side surfaces (15'). At least two of the side walls have spaced-apart protruding sections (16-17, 18-19) of irregular transverse cross-section which are aligned with straight intersecting outer parallel axes (12-12') of the side walls. The side walls (15) also have recessed sections (19) of irregular transverse cross-section defined between the protruding sections. When the cobblestones (10) are laid on a support surface in substantially straight aligned relationship to define a pavement (22), they are offset end-to-end and irregularly interlocked by some of the protruding sections (16, 17, 18, 19) of some of the cobblestones entering into the irregular recessed sections (19) of other of the cobblestones to prevent shifting of the cobblestones in the pavement (22). | |
