Chen Guangfu's son Chen Kegui was sentenced to three years, three months in prison last November for attacking officials who stormed his home to search for his uncle in what was viewed as retaliation by local officials.
Chen Guangcheng had been subjected to years of persecution and illegal detention for his work advising villagers on how to counter official abuses.
The family had been suffering from continuing harassment by local authorities, but Chen Guangfu said that appeared to be coming to an end. The government's decision to allow him and his mother to travel to the U.S. appeared to be another indication that pressure on the family was being lifted.
"Things of late have been quite a bit better," Chen said.