Breathing device having oxygen donor chemical cartridge

US4213453A · kind A · utility

Assignee

• DRAGERWERK AKTIEGESELLSCHAFT · DE

Inventors

• Ernst Warncke
• Adalbert Pasternack · Bad Schwartau, DE

Key dates

• Filing date: Jan 12, 1978
• Grant date: Jul 22, 1980
• Expiry date: Jan 12, 1998

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A62B7/08
• WIPO field: Other consumer goods
• WIPO sector: Other fields

Abstract

A breathing device to facilitate a person's respiratory breathing of air with sufficient oxygen, comprises a breathing conduit adapted to be connected to a person for breathing. A breathing bag surrounds a portion of the conduit and it is connected into the conduit through suitable check valve elements to permit respiratory breathing along the conduit and from and to the bag. A first chemical cartridge has a first housing with an opening therethrough through which the conduit extends and it has an oxygen-liberating chemical therein which surrounds and is spaced radially outwardly from the conduit. An annular passage is defined in the space between the chemical and the conduit which communicates with the bag. The conduit has an end adjacent the bottom end of the first cartridge which is connectable to a central tube of a second chemical cartridge. The central tube has an end portion which interengages with the bottom end portion of the first conduit. The tubular conduit portion of the second chemical cartridge housing is spaced from the bottom end of the housing and respiratory air may circulate downwardly from the breathing conduit through the tubular central portion of the second …