Pipes and tubular conduits – Combined – With hose protector
Reexamination Certificate
2003-09-04
2008-10-28
Brinson, Patrick F (Department: 3754)
Pipes and tubular conduits
Combined
With hose protector
C138S156000, C138S128000, C138S151000, C169S048000
Reexamination Certificate
active
07441565
ABSTRACT:
A low cost and mass-producible fire protection zone penetrating member is provided which can be set on piping or the like with a one-touch operation as well as a method of injection-molding the fire protection zone penetrating member. One expanding slot is provided on a cylindrical body made from thermally expanding graphite, thermally expanding rubber, or thermally expanding resin as a main ingredient thereof. The slot extends in a longitudinal direction. A piping inlet section is formed at an entrance of the expanding slot so that piping can be set in or taken out from inside the member by means of a one-touch operation. The fire protection zone penetrating member has the configuration as described above and is manufactured with an injection molding machine. The cylindrical body as a main body of the fire protection zone penetrating member may have an oval cross section, so that the fire protection zone penetrating member can be applied to piping having a diameter in a wide range. With this feature, a number of required types of the product can be reduced with the unit production cost lowered.
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PCT WO98/58704, Sawada, Hirotaka, Dec. 30, 1998.
Imamura Minoru
Yagishita Nobuki
Brinson Patrick F
McGlew & Tuttle P.C.
Tosetz Co. Ltd
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