Laserfiche WebLink
United States Patent ~[19J <br />Haekkinen <br />[11] .Patent Number: 4,567,708 <br />[4~ Date of Patent: Feb. 4, 1986 <br />[54] METHOD FOR LEVELING SUNKEN OR <br />BROKEN PROTIONS OF <br />EAKTH~UPPORTED FLOORS AND SLABS <br />(76] Inventor. Veiklw Haekkiaen, <br />Portaanloorvankaar S, SF-33800 <br />Tampere 80, Finland <br />[21] App!. No.: 536,401 <br />[22] Filed: Sep. 27, 1983 <br />[30] Foreign Application Priority Data <br />Sep. 27, 1982 [FI] Fmland ..............»..............823299 <br />[51] Ist CL ..................».....».............».................EO4B 1100 <br />(52] U.S.CL . .. ....................................521743; 404/18 <br />.......... <br />[58] Field of Search ........................»..........521143; 404!18; <br />264/46.6, 465 <br />[56] References Cited <br />U.S. PATENT DOCUMENTS <br />2041266 5/1936 Pointer ..................................404/18 <br />4,240,995 1211980 Milne ................................. 264/36 <br />_. <br />i~• ~l <br />/ ".'.' <br />S <br />4.470,719 9/1984 Dtiark et al ................»......404!15 <br />FORIIGN PATENT DOCUMENTS <br />600104 6/1978 Fed. Rep, of Germany»52/143 <br />1033353 6/1966 United Kingdom <br />2037349A 7/1980 United Kingdom <br />1602859 11/1981 United Kinddom <br />Primary Examiner -Carl D. Friedman <br />Assistant Examiner - Naoko N. Sladt <br />Attorney. Agent, or Fmn - Polloclt, Vande Sande do Priddy <br />[57] ABSTRACT <br />The method relates to levelling sunken or broken portions of <br />earth-supported floors or slabs (2, 2A). At least one hole (1) is made <br />in the floor and polyurethane foam is sprayed between the floor and <br />the underlying eairtlt through this hole. The foam creates in the <br />space a mould pressrae, which raises the floor. <br />7 Claims, I Drawing Figure <br />