Preserving container for liquid food substances Patent #: 3987941
ApplicationNo. 05/854487 filed on 11/25/1977
US Classes:222/386, Container with follower222/389, Fluid pressure actuated92/240Side wall portion includes peripheral axially extending flexible lip
ExaminersPrimary: Spar, Robert J.
Assistant: Silverberg, Fred A.
Attorney, Agent or Firm
International ClassesF16J 1/00 (20060101)
B65D 83/14 (20060101)
F16J 15/32 (20060101)
AbstractA piston for an aerosol container, particularly adapted for insertion through the top of the container; the piston includes an annular, cylindrical collar near its top end and a conical outwardly flaring flange atop the cylindrical collar, with the flange flaring wider toward the top of the container, whereby the flange scrapes the container interior as it moves up; the cylindrical collar is more flexible than the conical flange to ease insertion of the piston and for more effective piston sealing despite the piston cocking in the container; an anti-cocking ring are provided on the piston.