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Patent Searching and Data


Title:
HYDRAULIC ROTARY MACHINE
Document Type and Number:
WIPO Patent Application WO/2014/027542
Kind Code:
A1
Abstract:
A hydraulic rotary machine is fixed on a rotation axis, and is provided with a cylinder block having a plurality of cylinder bores, pistons slideably positioned inside the cylinder bores so as to demarcate a volume chamber, a swash plate for causing the pistons to move back and forth so as to expand and contract the volume chamber, and a valve plate sliding in contact with the cylinder block and having an intake port communicating with the volume chamber and a discharge port. The valve plate has a sliding contact surface formed projecting in a spherical shape in relation to the cylinder block, and the cylinder block has a sliding contact surface formed with a hollow corresponding to the shape of the sliding contact surface of the valve plate. A minute space is formed between the sliding contact surface of the valve plate at the outer edge position and the sliding contact surface of the cylinder block.

Inventors:
IWANAJI TETSUYA (JP)
AOYAMA ATSUSHI (JP)
Application Number:
PCT/JP2013/069477
Publication Date:
February 20, 2014
Filing Date:
July 18, 2013
Export Citation:
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Assignee:
KAYABA INDUSTRY CO LTD (JP)
International Classes:
F04B1/22; F03C1/253
Foreign References:
JPS595777U1984-01-14
JP2000018149A2000-01-18
JPS6034570U1985-03-09
JPH1122654A1999-01-26
JPH03156176A1991-07-04
JP2005337107A2005-12-08
JP2012082747A2012-04-26
Other References:
See also references of EP 2778410A4
Attorney, Agent or Firm:
GOTO, Masaki et al. (JP)
Masaki Goto (JP)
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