What kind of service did he provide during the Revolution? What kind of pension did his wife receive and when did she receive it? What record source did you consult to obtain this info? I searched through the federal pension files and couldn't find anything for him, or anyone with the Ruff surname from Bedford County.
Paul Heinegg's book does mention a Ruff family, and it appears to be the same Ruff petitioner to the state legislature. Is there an alternate spelling to this surname that you've found in the records?