|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||E04C-002/52 E04C-002/00 E04B-001/94|
|미국특허분류(USC)||052/232; 052/220.8; 052/317; 174/048|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 2 인용 특허 : 55|
A firestopping device which is held between the flange of water closet flange assembly and the floor surrounding the opening containing the drain pipe which includes a securement section positioned therebetween for being held in place and an intumescent section extending radially inwardly therefrom to a position above the vertical drain pipe opening to facilitate intumescent expansion thereinto responsive to the exposure of heat.
We claim: 1. An improved firestopping means being responsive to heating thereof for selectively sealing a vertical opening in a floor assembly having a drain pipe extending upwardly therewithin, the drain pipe being attachable to a water closet by a water closet flange assembly which includes a water closet flange means attachable to a water closet and a drain pipe engaging means attachable to the drain pipe, said improved firestopping means comprising: A. an outer securement section is positioned immediately above a generally horizontally extending upw...