Resilient squeeze bottle employing air check valve which permits pressure equilibration in response to a decrease in atmospheric pressure
Patent 5318204 Issued on June 7, 1994. Estimated Expiration Date: 
March 30, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 30, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 039658 filed on 03/30/1993US Classes:222/95, With wall-collapsing means222/105, With casing or support222/212, With flow controllers or closures222/481.5With movable flexible or remotely connected vent pipesExaminersPrimary: Kashnikow, AndresAssistant: Bomberg, Kenneth Attorney, Agent or FirmForeign Patent References
International ClassesB65D 035/28B65D 037/00 AbstractA resilient squeeze bottle dispensing package including an internal flexible bag which is suitable for dispensing viscous product such as toothpaste, but which includes an air valve which will automatically permit pressure equilibration in the chamber formed between the flexible bag and the interior of the bottle in response to a decrease in the atmospheric pressure surrounding the package. Employing a valve which permits such automatic pressure equilibration avoids unwanted oozing of viscous product from the discharge orifice of the package when the atmospheric pressure surrounding the package decreases, e.g., as by airplane travel or by travelling from a first elevation to a second substantially higher elevation. | |
