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:
Feb. 04, 1992
Filed:
Jan. 30, 1991
Kazutoshi Ikeda, Inazawa, JP;
Hiroshi Kuriyama, Hashima, JP;
Tetsumi Ichioka, Iwakura, JP;
Ryouji Matsuoka, Nakashima, JP;
Toyoda Gosei Co., Ltd., Nishikasugai, JP;
Abstract
A ventilating apparatus includes a duct including an indoor air inlet port for taking in indoor air and an indoor air outlet port for discharging the indoor air to the outdoors, a one-way valve for opening the indoor air outlet port when discharging the indoor air to the outdoors, the one-way valve being disposed on the indoor air outlet port, and a filter for purifying contaminated outdoor air intruding from the outdoors by way of the indoor air outlet port. The indoor air can be discharged to the outdoors as smoothly as it is done with a conventional ventilating apparatus, and at the same time the contaminated outdoor air is filtered and thereafter introduced into a room as clean outdoor air. Hence, it is possible to prevent the inside of a room from being contaminated with contaminated outdoor air.