Patents by Inventor Yutaka Tateishi
Yutaka Tateishi 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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Publication number: 20230038975Abstract: A cylindrical portion forms, at a first holding position, a first airflow path in which a communication portion open to a lower end of the body serves as a first introduction port for the outside air and in which a missing portion lacking a portion of a surrounding wall of the cylindrical portion serves as, by overlapping a slit open to an outer peripheral surface of the body, a first exit through which the outside air flowed in the body is discharged to above the ceiling, and forms, at a second holding position, a second airflow path in which a gap formed between an escutcheon and a heat collector projecting from the lower end of the body serves as a second introduction port for the outside air and in which the missing portion serves as a second exit through which the outside air is discharged to above the ceiling.Type: ApplicationFiled: December 23, 2020Publication date: February 9, 2023Applicant: SENJU SPRINKLER CO., LTD.Inventors: Masaharu Chiba, Yutaka Tateishi, Kazuma Ito
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Patent number: 11413485Abstract: A sprinkler head includes a main body, a valve element, a heat-sensitive disassembling unit, a deflector, at least one strut, and a guide ring. The body includes a nozzle from which fire-extinguishing liquid is discharged. The disassembling unit keeps the nozzle closed with the valve element and opens the nozzle through a breakdown action during activation. The deflector has a receiving surface (valve-element supporting portion) and vanes extending from the receiving surface toward the body. The deflector scatters, outward in axis crossing directions of the nozzle, the fire-extinguishing liquid discharged from the nozzle and received by the receiving surface. The least one strut holds the deflector scattering the fire-extinguishing liquid. The guide ring is movable along the at least one strut and between a tip (main-body-side end portion) of the at least one strut and tips of the vanes.Type: GrantFiled: July 8, 2020Date of Patent: August 16, 2022Assignee: SENJU SPRINKLER CO., LTD.Inventors: Masakatsu Kikuchi, Yutaka Tateishi, Masashi Murakami, Yuki Iizawa
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Patent number: 11311759Abstract: A sprinkler head includes a main body, a valve element, a heat-sensitive disassembling unit, a cylindrical frame, a set pin between the valve element and the disassembling unit, and a spring member engaged with the pin. The body includes a nozzle from which fire-extinguishing liquid is discharged. The disassembling unit includes a plunger having an interior circumferential surface. The disassembling unit keeps the nozzle closed with the valve element and opens the nozzle through a breakdown action during activation. The frame includes an upper part connected to the body and a lower part engaged with the disassembling unit. The pin includes a leg inserted in the plunger and including an inclined surface and a straight portion closer to the valve element. The straight portion is in contact with and slidable over the circumferential surface. The breakdown action causes the pin to move, with the inclined surface contacting the circumferential surface.Type: GrantFiled: July 8, 2020Date of Patent: April 26, 2022Assignee: SENJU SPRINKLER CO., LTD.Inventors: Masakatsu Kikuchi, Yutaka Tateishi, Yuki Iizawa, Masashi Murakami
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Publication number: 20210197002Abstract: A sprinkler head includes a main body, a valve element, a heat-sensitive disassembling unit, a cylindrical frame, a set pin between the valve element and the disassembling unit, and a spring member engaged with the pin. The body includes a nozzle from which fire-extinguishing liquid is discharged. The disassembling unit includes a plunger having an interior circumferential surface. The disassembling unit keeps the nozzle closed with the valve element and opens the nozzle through a breakdown action during activation. The frame includes an upper part connected to the body and a lower part engaged with the disassembling unit. The pin includes a leg inserted in the plunger and including an inclined surface and a straight portion closer to the valve element. The straight portion is in contact with and slidable over the circumferential surface. The breakdown action causes the pin to move, with the inclined surface contacting the circumferential surface.Type: ApplicationFiled: July 8, 2020Publication date: July 1, 2021Applicant: SENJU SPRINKLER CO., LTD.Inventors: Masakatsu Kikuchi, Yutaka Tateishi, Yuki Iizawa, Masashi Murakami
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Publication number: 20210016120Abstract: A sprinkler head includes a main body, a valve element, a heat-sensitive disassembling unit, a deflector, at least one strut, and a guide ring. The body includes a nozzle from which fire-extinguishing liquid is discharged. The disassembling unit keeps the nozzle closed with the valve element and opens the nozzle through a breakdown action during activation. The deflector has a receiving surface (valve-element supporting portion) and vanes extending from the receiving surface toward the body. The deflector scatters, outward in axis crossing directions of the nozzle, the fire-extinguishing liquid discharged from the nozzle and received by the receiving surface. The least one strut holds the deflector scattering the fire-extinguishing liquid. The guide ring is movable along the at least one strut and between a tip (main-body-side end portion) of the at least one strut and tips of the vanes.Type: ApplicationFiled: July 8, 2020Publication date: January 21, 2021Applicant: SENJU SPRINKLER CO., LTD.Inventors: Masakatsu Kikuchi, Yutaka Tateishi, Masashi Murakami, Yuki Iizawa
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Patent number: D871681Type: GrantFiled: August 10, 2018Date of Patent: December 31, 2019Assignee: SENJU SPRINKLER CO., LTD.Inventors: Yutaka Tateishi, Shou Chiba
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Patent number: D972079Type: GrantFiled: May 12, 2020Date of Patent: December 6, 2022Assignee: SENJU SPRINKLER CO., LTD.Inventors: Masaharu Chiba, Yutaka Tateishi, Kazuma Ito