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:
Jan. 04, 2005
Filed:
Sep. 24, 2002
Kim I. Matheny, Leslie, MO (US);
Steve R. Pinkston, House Springs, MO (US);
Kim I. Matheny, Leslie, MO (US);
Steve R. Pinkston, House Springs, MO (US);
Essex Manufacturing Company, St. Louis, MO (US);
Abstract
Control valve () for a user-donnable breathing device selectively switches from a normal breathing oxygen source to a pressurized emergency bottle. A valve body () has a normal oxygen source inlet and also an emergency source inlet for oxygen flow to the user of the device when donned. A poppet () permits normal source oxygen flow into the valve body (), normally keeping a piston () in a spring-biased cocked position spaced from a seal of the emergency bottle. A user-operated release permits the poppet to move to a position for blocking the normal source inlet but allowing the piston to become uncocked and so be driven by spring force to pierce the emergency bottle seal. Only emergency breathing oxygen from the bottle then flows to the user for emergency breathing. The device can be an escape hood for an aircraft passenger.