The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 1981
Filed:
May. 08, 1980
Applicant:
Inventor:
Rene Dolder, Jona, CH;
Assignee:
Geberit AG, Jona, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E04H / ;
U.S. Cl.
CPC ...
52-1 ; 52232 ; 137 77 ;
Abstract
Partitioning for preventing the spread of fire or smoke through wall apertures created by the burning of plastic pipe. Pre-stressed metal squeezing elements are retained by plastic bolts which melt at about 120.degree. C., releasing the squeezing elements and permitting them to squeeze together the heat-softened plastic pipe. An insert of foamable material may additionally be used to supplement the aperture sealing effect.