(under subclass 475.1) Seal wherein (1) the seal comprises a closed chamber having a deformable wall and is further provided with means to introduce fluid into said chamber to expand and move said wall into sealing engagement, or (2) the seal is responsive to internal or external fluid pressure to expand or contract a portion thereof.
SEE OR SEARCH THIS CLASS, SUBCLASS:
496.1, for seal cantilevered from an underlying base flange.
498.1, for a tubular seal.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings),
2.11+, for inflatable buildings. 220, Receptacles,
232, for inflatable gaskets for closures of the class.
277, Seal for a Joint or Juncture, for a generic sealing means or process,
646, for a static contact seal for other than an internal combustion engine, or a pipe, conduit, or cable having a particular cross-section that is hollow, fluid-filled or has an inflatable chamber.
