Cartridge port design for dispensing foam precursors

Details Cartridge port design for dispensing foam precursors Cartridge port design for dispensing foam precursors

B - Operations, Transporting

29

C

B29C 67/20 (2006.01) B29B 7/76 (2006.01)

Patent

CA 2073947

-21- IMPROVED CARTRIDGE PORT DESIGN FOR DISPENSING FOAM PRECURSORS Abstract of the Disclosure An improved chemical injection assembly disclosed of the type in which a hollow cylindrical housing with an outer surface defines an outer diameter and an inner surface defines an inner diameter. The hollow portion or bore defined by the inner surface in turn defines a cylindrical mixing chamber along the axis of the housing. At least one entry port assembly is positioned within the cylindrical housing perpendicularly to the housing's axis . The port assembly comprises an entry opening that extends through the housing to form a path of fluid communication through the housing to the mixing chamber, and an entry fitting positioned in the entry opening. The fitting has front and rear coaxial portions with a common axial poening therethrough. The rear portion is adjacent to the housing and the front portion is adjacent to the cylindrical mixing chamber. The end of the front portion that is adj acent the chamber has a curved face that substantially matches and aligns with the corresponding arc of the mixing chamber so that the curved face and the inner surface are flush with one another. The entry fitting further comprises means associated with the rear portion for maintaining the curved face of the front portion substantially in place and flush with the corresponding arc portion of the chamber. 52708

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