US 11,891,159 B2
Unmanned watercraft
Hiroshi Yoshida, Yokosuka (JP); Tadahiro Hyakudome, Yokosuka (JP); Ryotaro Suga, Yokosuka (JP); Takashi Yoshioka, Yokosuka (JP); Hisashi Sugiura, Osaka (JP); Hideki Endou, Kunisaki (JP); Yasuhiro Ueda, Osaka (JP); Yuichiro Dake, Osaka (JP); Tomoya Fukukawa, Osaka (JP); and Ryuji Nakazono, Kunisaki (JP)
Assigned to Japan Agency for Marine-Earth Science and Technology, Yokosuka (JP)
Appl. No. 16/970,957
Filed by Japan Agency for Marine-Earth Science and Technology, Kanagawa (JP)
PCT Filed Jan. 25, 2019, PCT No. PCT/JP2019/002415
§ 371(c)(1), (2) Date Aug. 19, 2020,
PCT Pub. No. WO2019/163397, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. 2018-028965 (JP), filed on Feb. 21, 2018.
Prior Publication US 2020/0391839 A1, Dec. 17, 2020
Int. Cl. B63H 21/38 (2006.01); H05K 5/04 (2006.01); H05K 7/20 (2006.01)
CPC B63H 21/38 (2013.01) [H05K 5/04 (2013.01); H05K 7/20272 (2013.01); H05K 7/20872 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An unmanned watercraft having a cooling structure for cooling a heat-generating body that includes electrical equipment and/or electronic equipment, wherein
the cooling structure includes an insulating envelope, being a waterproof envelope, that surrounds the heat-generating body in an electrically insulated state,
the insulating envelope is arranged outside a submerged part of the unmanned watercraft so as to be in contact with water present outside the unmanned watercraft, the submerged part being submerged in water,
the submerged part of the unmanned watercraft has a recess that is opened outward, and
the insulating envelope is accommodated in the recess, and
the recess and the insulating envelope together configure a front opening and a rear opening to form a water channel.