Patents by Inventor Kari Mayusumi
Kari Mayusumi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7011444Abstract: A fire sensor comprising a baseplate, a temperature detecting element, and a protective case. The baseplate has an outside surface which serves as a heat sensing surface which is exposed to a hot airflow generated by a fire. The temperature detecting element thermally contacts with the inside surface of the baseplate to detect the temperature of the baseplate. The protective case contacts with the radially outer portion of the inside surface of the baseplate to form a hermetically sealed space between itself and the baseplate. The temperature detecting element is confined within the hermetically sealed space. The baseplate has the temperature detecting element in approximately the central portion of the inside surface thereof and also has a shape and a material which meet the condition that the product of the thickness and heat conductivity of the baseplate is 1.1×10?4 (W/K) or less.Type: GrantFiled: September 19, 2002Date of Patent: March 14, 2006Assignee: Hochiki CorporationInventors: Kari Mayusumi, Yukio Yamauchi, Hiroshi Shima
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Patent number: 6917296Abstract: A fire heat sensor comprising a high-temperature detecting portion provided with a temperature detecting element which exhibits a fast heat response to a rise in ambient temperature, and a low-temperature detecting portion provided with a temperature detecting element which exhibits a slow heat response to a rise in ambient temperature. The fire heat sensor further comprises a resin member by which the high-temperature detecting portion and the low-temperature detecting portion are integrally formed so that heat energy is transferred from the temperature detecting element of the high-temperature detecting portion to the temperature detecting element of the low-temperature detecting portion. In the fire heat sensor, differential heat sensing is performed based on temperatures detected by the low-temperature detecting portion and the high-temperature detecting portion.Type: GrantFiled: September 25, 2002Date of Patent: July 12, 2005Assignee: Hochiki CorporationInventors: Kari Mayusumi, Yukio Yamauchi, Hiroshi Shima
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Patent number: 6877895Abstract: A fire sensor comprising a heat detection element for detecting heat from a hot airflow generated by a fire, a sensor main body, and an outer cover, which has a plurality of plate fins protruding from the sensor main body, for protecting the heat detecting element. The plate fins have a predetermined offset angle to a center line passing through the center of the outer cover and are erected approximately perpendicular to the sensor main body.Type: GrantFiled: September 18, 2002Date of Patent: April 12, 2005Assignee: Hochiki CorporationInventors: Kari Mayusumi, Yukio Yamauchi, Hiroshi Shima
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Publication number: 20030063005Abstract: A fire heat sensor comprising a high-temperature detecting portion provided with a temperature detecting element which exhibits a fast heat response to a rise in ambient temperature, and a low-temperature detecting portion provided with a temperature detecting element which exhibits a slow heat response to a rise in ambient temperature. The fire heat sensor further comprises a resin member by which the high-temperature detecting portion and the low-temperature detecting portion are integrally formed so that heat energy is transferred from the temperature detecting element of the high-temperature detecting portion to the temperature detecting element of the low-temperature detecting portion. In the fire heat sensor, differential heat sensing is performed based on temperatures detected by the low-temperature detecting portion and the high-temperature detecting portion.Type: ApplicationFiled: September 25, 2002Publication date: April 3, 2003Applicant: Hoichiki CorporationInventors: Kari Mayusumi, Yukio Yamauchi, Hiroshi Shima
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Publication number: 20030058116Abstract: A fire sensor comprising a heat detection element for detecting heat from a hot airflow generated by a fire, a sensor main body, and an outer cover, which has a plurality of plate fins protruding from the sensor main body, for protecting the heat detecting element. The plate fins have a predetermined offset angle to a center line passing through the center of the outer cover and are erected approximately perpendicular to the sensor main body.Type: ApplicationFiled: September 18, 2002Publication date: March 27, 2003Applicant: Hoichiki CorporationInventors: Kari Mayusumi, Yukio Yamauchi, Hiroshi Shima
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Publication number: 20030058117Abstract: A fire sensor comprising a baseplate, a temperature detecting element, and a protective case. The baseplate has an outside surface which serves as a heat sensing surface which is exposed to a hot airflow generated by a fire. The temperature detecting element thermally contacts with the inside surface of the baseplate to detect the temperature of the baseplate. The protective case contacts with the radially outer portion of the inside surface of the baseplate to form a hermetically sealed space between itself and the baseplate. The temperature detecting element is confined within the hermetically sealed space. The baseplate has the temperature detecting element in approximately the central portion of the inside surface thereof and also has a shape and a material which meet the condition that the product of the thickness and heat conductivity of the baseplate is 1.1×10−4 (W/K) or less.Type: ApplicationFiled: September 19, 2002Publication date: March 27, 2003Applicant: Hoichiki CorporationInventors: Kari Mayusumi, Yukio Yamauchi, Hiroshi Shima