Winchell, who had medical training, was also an inventor, becoming the first person to build and patent a mechanical artificial heart, implantable in the chest cavity (US Patent #3097366). He has been honored with a star on the Hollywood Walk of Fame for his work in television.
He voiced Tigger in The Many Adventures of Winnie the Pooh, Gargamel on The Smurfs, Dick Dastardly, Clyde, and Private Meekly on Wacky Races, Dick Dastardly and The General on Dastardly and Muttley, Clyde and Softy on The Perils of Penelope Pitstop, Sam-I-Am and Joey in Dr. Seuss on the Loose's adaptation of Green Eggs and Ham, Shun Gon on The Aristocats, Boomer the Woodpecker on The Fox and the Hound, The Fox on Garfield and Friends, and the Owl on various Tootsie Pop commercials.
Winchell died on June 24, 2005, of natural causes, at his home in Los Angeles California. He was 82 years old. Winchell was survived by his wife, daughter April, his other children, and three grandchildren. His remains were cremated and his ashes were scattered around his home property.