The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 1996
Filed:
Sep. 26, 1994
Kristine K Sabo, New Kensington, PA (US);
Respironics, Inc., Murrysville, PA (US);
Abstract
A duck-bill valve element and a non-rebreathing valve (NRV) incorporating same. The duck-bill valve element is formed of flexible, resilient material and includes a peripheral portion continuously and sealingly attached to a housing of the NRV and a sealing portion contiguous with and extending radially inwardly of the peripheral portion, whereby the sealing portion is operable to releasably contact an internal valve seat of the valve housing. A hollow, wedge-shaped formation is contiguous with and projects from a first surface of the sealing portion. The wedge-shaped formation has a base defining an opening in the sealing portion and a distal end terminating in a slot. The valve element further includes integral structure for preventing inversion of the wedge-shaped formation under pressure applied to the wedge-shaped formation. The duck-bill valve element and the NRV may be employed in a breathing apparatus gas flow circuit between a source of respiratory gas and a patient interface component such as a respiratory mask.