Death Bed: The Bed That Eats

Death Bed: The Bed That Eats is a 1977 American surrealist folk horror film written, produced, and directed by George Barry in his only feature film, and starring Demene Hall, William Russ, Julie Ritter, and Dave Marsh. The plot centers on a demon-possessed bed that is passed on through generations, bringing tragedy upon those who come across it.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.