Hydraulic rotating equipment, and working machine provided with this hydraulic rotating equipment

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United States of America Patent

PATENT NO 9915249
SERIAL NO

14571784

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Disclosed is hydraulic rotating equipment provided with a rotating shaft, a cylinder block including a plurality of cylinders, a like plurality of pistons accommodated in the cylinders, respectively, and a valve plate maintained in slide contact with a rear end surface of the cylinder block. The valve plate includes a low-pressure port communicable with the cylinders, a high-pressure port formed in an arcuate shape over a predetermined angle along a circumferential direction of the rotating shaft and communicable with the cylinders, a seal land maintained in slide contact with the rear end surface, and a sliding contact member arranged on a periphery of the seal land in a range of the predetermined angle along the circumferential direction of the rotating shaft and maintained in slide contact with the rear end surface. A working machine provided with the hydraulic rotating equipment is also disclosed.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
HITACHI CONSTRUCTION MACHINERY CO LTD16-1 HIGASHIUENO 2-CHOME TAITO-KU TOKYO 1100015 ?1100015

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hemmi, Makoto Tokyo, JP 20 76
Sakurai, Shigeyuki Tsuchiura, JP 15 175
Suzuki, Kenta Tokyo, JP 64 96
Suzuki, Motoshi Tsuchiura, JP 44 514

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