Facepiece with open port

US8955514B2 · kind B2 · utility

Assignee

• MSA Technology, LLC · US

Inventors

• Carsten Leuschner · Königs Wusterhausen, DE
• Klaus Schmidtke · Berlin, DE
• Michael Horn · South Setauket, US
• Christopher L. Prete · Oil City, US
• Marco Tekelenburg · Zelienople, US

Key dates

• Filing date: Jun 24, 2011
• Grant date: Feb 17, 2015
• Expiry date: May 11, 2033

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A62B18/08
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A respiration system includes a regulator including an inlet for connection to a source of pressurized gas and an outlet for delivery of the gas to the user, and a respiration facepiece for use in connection with the regulator including an interface removably attachable to the regulator, at least one seal system adapted to form a sealing engagement with the face of a user, an inhalation port in fluid connection with the regulator interface and with the facepiece interior, an inhalation check valve in fluid connection between the inhalation port and the facepiece interior; an exhalation port in fluid connection with the facepiece; an exhalation check valve in fluid connection with the exhalation port; and an ambient port separate from the inhalation port and from the exhalation port, which is in fluid connection with the facepiece interior without an intervening check valve.