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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 10975738 B1

PDFFull Text
Date of Patent:
Apr. 13, 2021

Filed:

Apr. 03, 2018

Fluid heating apparatus for engine

Applicant:

Kubota Corporation, Osaka, JP;

Inventor:

Koji Nakakita, Sakai, JP;

Assignee:

KUBOTA CORPORATION, Osaka, JP;

Attorney:

Panitch Schwarze Belisario & Nadel LLP

Primary Examiner:

Erin E McGrath

Int. Cl.
CPC ...
F01M 5/00 (2006.01); F01M 13/00 (2006.01); F02M 31/125 (2006.01); F01M 13/02 (2006.01); F02M 25/06 (2016.01); F02D 41/22 (2006.01); H05B 3/00 (2006.01); F01M 13/04 (2006.01);
U.S. Cl.
CPC ...
F01M 5/001 (2013.01); F01M 13/0011 (2013.01); F01M 13/028 (2013.01); F02D 41/22 (2013.01); F02M 25/06 (2013.01); F02M 31/125 (2013.01); H05B 3/0019 (2013.01); F01M 2013/0022 (2013.01); F01M 2013/0027 (2013.01); F01M 2013/0472 (2013.01); F01P 2070/04 (2013.01); H05B 2203/02 (2013.01); H05B 2203/021 (2013.01); H05B 2203/022 (2013.01); H05B 2203/035 (2013.01); Y02T 10/12 (2013.01); Y02T 10/40 (2013.01);
Abstract

An engine fluid heating apparatus, preventing failure in heating fluid, is provided. A control device opens a sub switch during an initial opening period ('IOP') after closing a main switch, and the control device closes the sub switch during an initial closing period ('ICP') after the IOP. Circuit normality is displayed by turning on an indicator lamp when a heater feeding circuit is electrically conducted via a bypass electric circuit during the IOP. Heater feeding is displayed by turning off the indicator lamp when power is supplied to the electric heater via a trunk electric circuit during the ICP. Circuit abnormality is displayed by turning off the indicator lamp when the heater feeding circuit is not electrically conducted via the bypass electric circuit during the IOP, and the circuit abnormality display is held by keeping the indicator lamp off during the ICP immediately after the IOP.

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