Abstract: A hydraulic pump/motor includes: a cylinder block rotating about a rotation axis; a piston in a cylinder bore; and a valve plate facing a cylinder port. The valve plate includes: a high pressure port through which hydraulic oil discharged from the cylinder port flows; a low pressure port through which the oil to be sucked into the cylinder port flows; a region disposed between the high and low pressure ports in a circumferential direction of the rotation axis and including a top dead center position facing the cylinder port of the cylinder bore in which the piston moved to a top dead center is disposed; and a residual pressure release port between the top dead center position and the low pressure port in the region. The residual pressure release port includes first and second ports disposed at a positions different from each other in the radial direction of the rotation axis.

Abstract: A hydraulic pump motor includes: a cylinder block; a plurality of cylinder bores; a port block and a valve plate, the valve plate being provided with a high pressure port and a low pressure port, the port block being provided with a discharge oil passage and a suction oil passage, a piston disposed in each cylinder bore, and oil flowing through the discharge oil passage and the suction oil passage. Further, the valve plate is provided with a reproduction port at a bottom dead center side position, the port block is internally provided with a reproduction oil passage, and the reproduction oil passage passes through a first region on a side of the high pressure port of the virtual plane and passes through a second region on a side of the low pressure port of the virtual plane in the port block.

Abstract: An axial-type hydraulic pump/motor in which a cylinder block with a plurality of cylinder bores formed around a rotation axis slides with respect to a valve plate that has a valve plate discharge port and a valve plate suction port, and controls the amount of reciprocation of a piston in each cylinder bore depending on the inclination of a swash plate. Based on the rotational direction of the cylinder block, an opening shape of an end portion on the front side in the rotational direction of a cylinder port and an opening shape of an end portion on the rear side in the rotational direction of the valve plate suction port PB1 have the same shape or partially have the same shape.

Abstract: An axial-type hydraulic pump/motor in which a cylinder block with a plurality of cylinder bores formed around a rotation axis slides with respect to a valve plate that has a valve plate discharge port and a valve plate suction port, and controls the amount of reciprocation of a piston in each cylinder bore depending on the inclination of a swash plate. Based on the rotational direction of the cylinder block, an opening shape of an end portion on the front side in the rotational direction of a cylinder port and an opening shape of an end portion on the rear side in the rotational direction of the valve plate suction port PB1 have the same shape or partially have the same shape.

Abstract: A wireless communication terminal, in accordance with a time division multiple access system, establishes radio-links to multiple base stations and conducts a communication by using slots assigned by the multiple base stations, including: a synchronization information acquisition means generating synchronization information regarding slots used between the wireless communication terminal and multiple base stations that are candidates to which a communication is conducted; and a selection means, based on the synchronization information, classifies the multiple base stations into multiple synchronized base station groups which include the base stations that provides synchronized slots, and selects one of the synchronized base station groups including the bases stations that are candidates to which the radio-link is established.

Abstract: A wireless communication terminal, in accordance with a time division multiple access system, establishes radio-links to multiple base stations and conducts a communication by using slots assigned by the multiple base stations, including: a synchronization information acquisition means generating synchronization information regarding slots used between the wireless communication terminal and multiple base stations that are candidates to which a communication is conducted; and a selection means, based on the synchronization information, classifies the multiple base stations into multiple synchronized base station groups which include the base stations that provides synchronized slots, and selects one of the synchronized base station groups including the bases stations that are candidates to which the radio-link is established.