Wedge seal for a tracheotomy tube
Patent 4009720 Issued on March 1, 1977. Estimated Expiration Date: 
March 1, 1994. 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 1, 1994. 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 References 2310944 3169529 3688774 3693624 InventorAssigneeApplicationNo. 604640 filed on 08/14/1975US Classes:128/207.15, Breathing passage occluder285/334.2Double-tapered internal sleeveExaminersPrimary: Pellegrino, Stephen C.Attorney, Agent or FirmInternational ClassA61M 16/04 (20060101)AbstractA wedge-like seal for use with a tracheotomy tube having an inner cannula and an outer cannula. The seal is integrally formed within the outer end of the inner cannula to provide a tight seal engagement between the inner cannula and the outer cannula as well as between the coupling connector and the inner cannula. Incorporated in the seal is a circular sealing ridge from which depend two frusto-conical shaped sealing surfaces extending in opposite directions from the central ridge. The seal minimizes the force necessary to establish as well as to disengage the sealing contact between the respective tracheotomy tube parts, eliminating possible discomfort to the patient. | |
