The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2014
Filed:
Jun. 26, 2009
Tetsuhide Yokoyama, Tokyo, JP;
Toshihide Koda, Tokyo, JP;
Teruhiko Nishiki, Tokyo, JP;
Hideaki Maeyama, Tokyo, JP;
Taro Kato, Tokyo, JP;
Keisuke Shingu, Tokyo, JP;
Takuho Hirahara, Tokyo, JP;
Shin Sekiya, Tokyo, JP;
Tetsuhide Yokoyama, Tokyo, JP;
Toshihide Koda, Tokyo, JP;
Teruhiko Nishiki, Tokyo, JP;
Hideaki Maeyama, Tokyo, JP;
Taro Kato, Tokyo, JP;
Keisuke Shingu, Tokyo, JP;
Takuho Hirahara, Tokyo, JP;
Shin Sekiya, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A refrigerant compressor includes: an electric motor including a stator and rotor inside a sealed vessel; a compressing mechanism driven by a crank shaft in the rotor; a lower portion oil pool storing in the sealed vessel lubricating oil that lubricates the compressing mechanism; an upper counterweight on an upper end of the rotor. Refrigerant gas compressed by the compressing mechanism is discharged inside the sealed vessel, passes through a gas channel formed on the electric motor, moves from a lower space to an upper space with respect to the electric motor, and is discharged outside the sealed vessel. An oil return flow channel is formed on the upper end of the rotor toward a lower end from a vicinity of a leading end portion of the upper counterweight in a direction of rotation, and oil expressed in a vicinity of the rotor is directed to the oil return flow channel.