US 9,809,940 B2
Pneumatic fender and mouth piece metal for pneumatic fender
Shu Yamada, Hiratsuka (JP)
Assigned to The Yokohama Rubber Co., LTD., (JP)
Appl. No. 15/300,976
Filed by The Yokohama Rubber Co., LTD., Minato-ku, Tokyo (JP)
PCT Filed Mar. 24, 2015, PCT No. PCT/JP2015/058949
§ 371(c)(1), (2) Date Sep. 30, 2016,
PCT Pub. No. WO2015/151937, PCT Pub. Date Oct. 8, 2015.
Claims priority of application No. 2014-071321 (JP), filed on Mar. 31, 2014.
Prior Publication US 2017/0022678 A1, Jan. 26, 2017
Int. Cl. B63B 59/02 (2006.01); E02B 3/26 (2006.01); F16K 17/00 (2006.01); F16K 17/04 (2006.01)
CPC E02B 3/26 (2013.01) [B63B 59/02 (2013.01); F16K 17/00 (2013.01); F16K 17/04 (2013.01); B63B 2059/025 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A pneumatic fender comprising:
a fender bladder including a cylindrical portion and bowl-like hemispherical portions connected to each end of the cylindrical portion;
a mouth piece metal disposed on at least one of the hemispherical portions,
the mouth piece metal including:
a safety valve that, upon an internal pressure of a cavity of the fender bladder reaching a pressure threshold, opens to connect the cavity of the fender bladder to outside air and reduce the internal pressure, and
a communication passage that connects the cavity of the fender bladder and outside air; and
a bladder open/close valve that opens and closes the communication passage; wherein
the mouth piece metal further includes:
a receiving chamber that isolates the safety valve from the cavity of the fender bladder,
a through hole that connects a cavity of the receiving chamber and the cavity of the fender bladder, the through hole being formed on a dividing wall constituting the receiving chamber,
an open/close valve that opens and closes the through hole,
a resilient member that constantly biases the open/close valve toward a closing direction of the through hole,
a receiving chamber communication passage that connects the cavity of the receiving chamber and outside air, and
a receiving chamber open/close valve that opens and closes the receiving chamber communication passage; and
upon the internal pressure of the cavity of the fender bladder being less than the pressure threshold and greater than a standard pressure, which is a sum of a predetermined initial internal pressure and an allowable pressure, the open/close valve opens, opening the closed through hole.