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:
Mar. 31, 2015
Filed:
Dec. 15, 2009
Satoshi Nakamura, Shizuoka, JP;
Mutsunori Matsunaga, Shizuoka, JP;
Takeshi Tsuchiya, Tsuchiura, JP;
Masatsugu Chikano, Shizuoka, JP;
Satoshi Nakamura, Shizuoka, JP;
Mutsunori Matsunaga, Shizuoka, JP;
Takeshi Tsuchiya, Tsuchiura, JP;
Masatsugu Chikano, Shizuoka, JP;
Hitachi Appliances, Inc., Tokyo, JP;
Abstract
In a revolution type compressor using a balance weight for balancing a rotating mass, the effect of oil churn reduction is enhanced, and compressor input is reduced. A balance weight fixed to a drive shaft between a rotor of an electric motorand a compression mechanism includes a weight portion in a substantially semicircular column shape for balancing a rotating mass, a cover portion which is substantially semi-cylindrical and has an opening in the vicinity of a top and bottom at an opposite side in a radial direction from the weight portion, and a hollow space surrounded by the weight portion and the cover portion. Further, a space for discharging oil is provided between the balance weight and the rotor. By the structure, reduction in oil churn, and reduction in input of the compressor are realized, and the compressor with less power consumption is obtained.