.~ Plural integral radially extending resilient metallic sealing tongues on side wall portion
DEFINITION
Classification: 92/192
(under subclass 172) Apparatus in which the side wall portion of the piston is provided with a plurality of axially spaced relatively thin flexible metallic tongue-like members extending circumferentially and radially with respect to the piston axis, said tongue-like members being formed as an integral part of the side wall portion and the outer ends thereof forming the outer peripheral extent of the piston side wall portion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
249+, for a nonmetallic piston formed of flexible material which may be provided with circumferential radially extending sealing tongues.
