US 9,284,958 B2Granted

Rotary compressor

AssigneeDaikin Industries, Ltd.

InventorsYukihiro Inada, Takazou Sotojima, Yoshitaka Shibamoto, Kenichi Sata

Life of this patent

Estimating the term…

Loading patent…

Abstract

A rotary compressor includes a cylinder with a cylinder chamber, a piston, a blade and a pair of bushes. The piston is movable-within the cylinder chamber. The blade is integrally formed with the cylinder or piston and penetrates a groove formed in the other to segment the cylinder chamber into high and low pressure chambers. The bushes are provided at the groove and sandwich the blade from both sides of the blade. At least one of the pair of bushes includes an oil supply passage formed from a blade-side sliding surface to a groove-side sliding surface, a blade-side oil reservoir formed on the blade-side sliding surface, and a groove-side oil reservoir on the groove-side sliding surface. Ends of the oil supply passage open to the blade-side and groove-side oil reservoirs. The groove-side oil reservoir being wider than the blade-side oil reservoir.

Claims9

Dependent claims

A rotary compressor comprising:

a cylinder including a cylinder chamber;
a piston configured to eccentrically rotate within the cylinder chamber;
a blade integrally formed with one of the cylinder and the piston and penetrating a groove formed in the other of the cylinder and the piston to segment the cylinder chamber into a high pressure chamber and a low pressure chamber;
and
a pair of bushes provided at the groove and sandwiching the blade from both sides of the blade to support the blade,
at least one of the pair of bushes including
an oil supply passage formed from a blade-side sliding surface to a groove-side sliding surface,
a blade-side oil reservoir formed on the blade-side sliding surface, one end of the oil supply passage opening to the blade-side oil reservoir, and
a groove-side oil reservoir on the groove-side sliding surface, an other end of the oil supply passage opening to the groove-side oil reservoir, and the groove-side oil reservoir being wider than the blade-side oil reservoir.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/422,686Filed 19 Aug 2013
Priority: JP 2012-18164720 Aug 2012
Published: US 2015/0240815 A127 Aug 2015
Granted: 15 Mar 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F04C 29/02
Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00: lubrication ;…
F04C 18/063
Of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or…: with…
F04C 18/32
Having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics…:…
F04C 18/322
Having both the movement defined in group F04C18/02 and relative reciprocation between the co-operating members: with vanes hinged to the outer…