Paving stone set
Patent 4907909 Issued on March 13, 1990. Estimated Expiration Date: 
March 31, 2008. 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.
March 31, 2008. 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 101691 114895 933521 2060746 3828509 Method of laying brick for swimming pool patios and the like Curved like paving stone element for use in setting a curved paving Paving stone, process for manufacturing same and device for carrying out the manufacturing process Paving stone Finishing tile Patent #: 4821479 InventorApplicationNo. 175526 filed on 03/31/1988US Classes:404/37, Including spacer means404/38, Integral404/42PatternedExaminersPrimary: Massie, Jerome W.Assistant: Smith, Matthew Attorney, Agent or FirmForeign Patent References
International ClassE01C 005/06Foreign Application Priority Data1987-04-02 CHAbstractThe paving stone set consists of stones 11-16 each with six lateral boundary surfaces 1-6, 17-22. Four of these boundary surfaces 1 and 4; 3 and 5; 18 and 21; 19 and 22 are parallel to one of the other of the four surfaces, while the remaining two surfaces 2 and 6; 17 and 20 define planes which intersect at an acute angle. On the straight edges, the stones 11-13 are laid alternatingly. A joint pattern is created with expansion joints, which do not stand vertically to the support joints. The expansion joints are formed from two wedges directed opposite to one another, and therefore have an effect which is irregular in comparison with the support joints. The slotted boundary surfaces 2, 6 make it possible to lay the stones 11-13 according to the sloping angles selected in curves with small radii chosen as desired, whereby the wedge-shaped joints close gradually. The stones 14-16 serve as a supplementary curve set, and make possible the laying of Roman arrow patterns, as well as an Archimedean spiral. The paving stone set can be quickly and simply laid down without trimming the stones. | |
