(under subclass 208) Apparatus in which the skirt-like member is provided with an elongated relatively narrow aperture extending through the wall thereof normally for allowing relative movement between the parts of the skirt-like member adjacent the aperture.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type,
174, for a plurality of relatively movable working members, each working member having spaced end faces and a common rotating shaft connected to said working members between said spaced end faces.