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:
Nov. 26, 1996
Filed:
Jun. 29, 1994
Akihiko Yoshida, Saitama-ken, JP;
Yasushi Yoshida, Saitama-ken, JP;
Junichi Shiobara, Saitama-ken, JP;
Kyoichi Fujimori, Higashimatsuyama, JP;
Hitoshi Sugimoto, Higashimatsuyama, JP;
Akihiko Yatsunami, Higashimatsuyama, JP;
Yoshihisa Fujisawa, Saitama-ken, JP;
Zexel Corporation, Tokyo, JP;
Abstract
A semi-closed type of breathing apparatus includes an air exhaling duct for guiding breathing air exhaled from a mouthpiece to a canister filled with a carbon dioxide remover, and an air inhaling duct for guiding the breathing air, from which carbon dioxide has been removed, to the mouthpiece. The air inhaling duct and the air exhaling duct are designed in a double-duct structure such that the air inhaling duct is surrounded by the air exhaling duct. That is, the ducts are formed in a single hose. Therefore, detachment of the breathing apparatus from a user is easily performed, the overall appearance of the apparatus is not marred, and the entire construction of the apparatus is simplified.