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Videvuds – Arijs LAPSA


Videvuds – Arijs LAPSA


Leading Researcher, Ecological Building Centre
Civil Engineering Faculty
Riga Technical University

Azenes iela 14/24
Riga, LV 1048

Phone: +371 708 9296
Fax: +371 708 9223
E-mail: valapsa@latnet.lv  

Born: July 7, 1933, Riga, Latvia






Interests in inventing:

  • Methods of non-destroying control
  • Original building materials and building structures
  • Heat insulation of buildings
  • Ecological construction

Main invention:

  • Lignoconcrete

  • External wall thermo-bloc

Selection of patent documents:

Totally: 32 authors’ certificates of USSR, 8 foreign patents, 39 patents of Latvia

Industrial design patent:

  • V.Lapsa. Bay type window blocks. LV D 10063, 1995

Patents of Latvia:

  • V.Lapsa a.o. Construction element of external wall, its design and building method. LV 5211, 1992; LV 10521, 1993; LV 10522, 1993;  LV 10754, 1993;  LV 11203, 1994; LV 11202, 1994; LV 11203, 1994;  LV 13133, 2004; LV 13236, 2005; LV13404, 2006. LV13429, 2006.  
  • V.Lapsa a.o. External wall building method. LV 11349 B, 1996; LV 11350 B, 1996.
  • V.Lapsa a.o. Method for external wall warming. LV 5054, 1992; LV 11490 B, 1996; LV 12663, 2001; LV13573, 2007
  • V.Lapsa a.o. External wall unit. LV 5315, 1992;  LV 11352 B, 1994;  LV 12392, 1999; LV 12417, 2000; LV 12418, 2000; LV12508, 2000; LV 12619, 2001; LV 13134, 2004; LV 13291, 2005; LV 13363, 2005. 
  • V.Lapsa a.o. Reinforced concrete plate and its production process. LV 11561, 1996; LV 12807, 2002
  • V.Lapsa a.o. Concrete and grout mixer. LV 5011, 1992;  LV 5210, 1992; LV 10754, 1993; LV 12041, 1998.

Foreign patents:

  • Viscometer:
    • Patent of France Nr.7340115, 1973
    • Patent of FRG Nr.2356350, 1973
    • Patent of England Nr.1404265, 1975
    • Patent of Italy Nr.1001706, 1976
    • Patent of Czech Republic Nr.162495, 1976
    • Patent of Spain Nr.420485, 1976
    • Patent of Hungary Nr.168294, 1976
    • Patent of Netherlands Nr.7315466, 1978
  • Heat and sound insulating composition and a method to produce the same from the waste of the cellulose, paper and timber industries:
    • USA application Nr. GB 775785076, 1993

About the inventions

External wall thermo-blocks –

    new type of external wall elements provided for building of family houses. If compared to the traditional blocks made of one homogenous material, thermo-blocks consist of two components: bearing material (concrete) and heat insulating material. Both materials are isolated following their highest technical efficiency available for every building company. Only in this case the costs of their useful functions - bearing capacity and thermal resistance – will be the lowest.

Lignoconcrete –

    lightweight heat insulating concrete, applicable both as external wall material for low buildings and as sound, absorption and heat insulating plates. Advantages: in comparison with such analogues as arbolit, fibrolit or aerocrete it is more ecological as it allows to the full to use cellulose and paper production wastes that are in large quantities and that are littering water and soil in the locality of these production enterprises in the material technology, and it has much lower prime cost (30-40%) as a practically inexhaustible free base of raw materials is used.

More about the inventor (in Latvian)

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