Inventors:
Douglas C. Dayton - Harvard MA, US
Vincent F. Cannistraro - Lincoln MA, US
David Duncanson - West Newbury MA, US
Thomas J. Kosik - Pelham NH, US
Robert McCaffrey - Hillsboro NH, US
International Classification:
B65D 53/00
Abstract:
A plug includes a conformable element and a structural cover or top plate for plugging a hole in a concrete floor slab. This permits a workman to plug the hole; unplug the hole; and, in some embodiments, fit a pipe through the hole. Moreover, the conformable element may be swapped-out on site, allowing a workman to adjust a diameter and outer surface of the plug to meet on-site conditions.