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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.:

US 9574996 B1

PDFFull Text
Date of Patent:
Feb. 21, 2017

Filed:

Sep. 02, 2011

Suction-type smoke sensing system

Applicants:

Shintaro Masumoto, Hachioji, JP;

Kazuhisa Itoh, Hachioji, JP;

Masao Iguchi, Hachioji, JP;

Fumiyoshi Kobayashi, Hachioji, JP;

Satoru Nakahata, Hachioji, JP;

Inventors:

Shintaro Masumoto, Hachioji, JP;

Kazuhisa Itoh, Hachioji, JP;

Masao Iguchi, Hachioji, JP;

Fumiyoshi Kobayashi, Hachioji, JP;

Satoru Nakahata, Hachioji, JP;

Assignee:

FENWAL CONTROLS OF JAPAN, LTD., Tokyo, JP;

Attorney:

Bacon & Thomas, PLLC

Primary Examiner:

Sunghee Y Gray

Int. Cl.
CPC ...
G01N 21/00 (2006.01); G08B 17/10 (2006.01); G01N 21/53 (2006.01); G08B 17/103 (2006.01); G08B 17/107 (2006.01); G08B 17/113 (2006.01);
U.S. Cl.
CPC ...
G01N 21/53 (2013.01); G08B 17/10 (2013.01); G08B 17/103 (2013.01); G08B 17/107 (2013.01); G08B 17/113 (2013.01);
Abstract

This invention relates to a suction-type smoke sensing system which detects smoke with high accuracy and rapidly and identifies a fire occurrence spot quickly. The system of the present invention is provided with a piping for sucking air in each region to be inspected, a photoelectric smoke sensor which, when air in each of the regions to be inspected is sucked, senses mixing of smoke in the air, and a control unit which sucks the air in the region to be inspected and is electrically connected to the photoelectric smoke sensor so as to receive and process a detection signal. The photoelectric smoke sensor is provided with a smoke sensing portion which senses the smoke in the sucked air, a suction port provided on the air inflow side of the smoke sensing portion, directly sucks the air in the region to be inspected, and fitted with a base end portion of a suction pipe which extends to the region to be inspected, and a fitting portion provided on the air outflow side of the smoke sensing portion and fitted with the end portion of the piping.

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