SELF RESTRAINED JOINT FOR DUCTILE IRON PIPE AND FITTINGS
摘要
<p>A combination sealing and restraint system for an as-cast ductile iron pipe systems. A ductile iron pipe/fitting with a bell end has an as-cast profile formed therein for receiving both a gripping ring and a sealing ring in spaced apart locations. The gripping ring is installed within a first recess provided as a part of the as-cast profile in a post-casting step. The sealing ring is also installed within a second, spaced recess after the casting operation is complete. The sealing ring can be a dual durometer gasket which can be flexed and inserted into the profile. The same type bell end can be provided as an adapter which converts a traditional mechanical joint restraint to an internal gripping and restrain system.</p>
申请公布号
WO2009134373(A1)
申请公布日期
2009.11.05
申请号
WO2009US02613
申请日期
2009.04.29
申请人
S & B TECHNICAL PRODUCTS, INC.;WRIGHT, MICHAEL;CHINCHILLA, RANDALL