TFA Versions

This information may not be complete.

Generation 1:    Pre-production prototypes.

                    US government USDA Forest Service Forest Products Lab. developed the vacuum restraint system and the patented method and original basic apparatus.

Generation 2:    VCA production series.

                    Isthmus Engineering and Manufacturing Cooperative obtained exclusive licensing of the patents and manufactured the first integrated production series.

Generation 3:    TFA production series.

                    Isthmus produces the next generation which incorporated major performance modifications, updates and improvements.

Generation 4:    TFA production series.

                    Delphinus acquires the exclusive patents, rights and ownership of the VCA / TFA project. Major changes in the computer, electronics and software areas.