Bottle stopper for vacuumization and pressure indicating has valve actuator with upper operator portion, connected to lower valve body portion by shaft portion including indicator for indicating pressure within bottle

摘要

A valve actuator (70) with an upper operator portion, connected to a lower valve body portion (74) by a longitudinally extending shaft portion includes an indicator (88). The valve body portion is sealingly engageable with the sealing surface of the aperture. A rigid inner body (42) with a sleeve portion (44) disposed within the bore. The vacuum in the bottle acts to deflect the lower flange, the extent of such deflection controlling the position of the indicator, such that it is visible above the outer body when the vacuum is less than a predetermined value. The stopper (10) has an outer body (12) with a cylindrical sleeve portion (14) having an outer surface for forming an air and fluid tight seal with the bottle neck (20), and defining an axial bore. A resilient lower flange (18) extends radially inward from the interior surface to an axial aperture (38) having a sealing surface. The sealing surface of the aperture and the valve body portion may have complimentary conical shapes. The upper flange portion (16) of the outer body may have an inner surface defining circumferential groove.