Title:
COMPRESSOR PISTON, COMPRESSOR, AND HEAT PUMP UNIT
Document Type and Number:
WIPO Patent Application WO/2018/155209
Kind Code:
A1
Abstract:
A compressor piston according to at least one embodiment of the present invention includes: a piston body having a top surface that, together with a cylinder, forms a compression chamber in which a gas is compressed; and a protrusion provided so as to protrude from the top surface along the axial direction of the piston body. The protrusion is formed such that the dimension in a direction orthogonal to the axial direction becomes smaller towards the tip end of the protrusion. The shape of a cross section of the protrusion along the direction orthogonal to the axial direction is circular. A part of the protrusion that connects to the top surface gradually reduces in diameter from the top surface to the tip end of the protrusion, and has a cross section along the axial direction that forms a concave curved surface.
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Inventors:
KUDO MIZUO (JP)
SHIGA MOTOYASU (JP)
SHIGA MOTOYASU (JP)
Application Number:
PCT/JP2018/004384
Publication Date:
August 30, 2018
Filing Date:
February 08, 2018
Export Citation:
Assignee:
MAEKAWA SEISAKUSHO KK (JP)
International Classes:
F04B39/00; F04B39/12
Domestic Patent References:
WO2014192382A1 | 2014-12-04 |
Foreign References:
JPH0518358A | 1993-01-26 | |||
US20040253131A1 | 2004-12-16 |
Attorney, Agent or Firm:
SEISHIN IP PATENT FIRM, P.C. (JP)
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