Apparatus for multiple setting of concrete paving blocks
Patent 4320985 Issued on March 23, 1982. Estimated Expiration Date: 
December 11, 1999. 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.
December 11, 1999. 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 Re28305 1573263 2578016 2597760 Machine for mechanical production of brick masonry 4090628 Apparatus for placing paving elements Method and apparatus for producing a ground covering from individual paving stones Patent #: 4194853 InventorAssigneeApplicationNo. 06/102479 filed on 12/11/1979US Classes:404/99, Block laying414/623, Multiple article or rack type52/749.13MasonryExaminersPrimary: Byers, Nile C. Jr.Attorney, Agent or FirmInternational ClassesB66C 1/44 (20060101)B66C 1/42 (20060101) E01C 19/52 (20060101) E01C 19/00 (20060101) Foreign Application Priority Data1978-12-13 DEAbstractApparatus for the setting of paving blocks includes a movable chassis, an outrigger arm mounted on the chassis for heightwise adjustment, and grab tong devices suspended from the outrigger arm, the grab tong devices each being operable to grip a group of paving blocks laterally. Each of the grab tong devices has opposed jaws, one of which is fixedly mounted and the other of which is movably mounted, and linkage means are provided to operably mount the movable jaw such that upon suspension of the grab tong device from the outrigger arm with paving blocks disposed between the opposed jaws, the linkage means is operable to effect a clamping action on the paving blocks to thereby provide for lifting of the paving blocks with the clamping force being proportional to the weight being lifted. | |
