Part-I - Controller General of Patents Designs and Trademarks

(12) PATENT APPLICATION PUBLICATION (21) Application No.1742/CHE/2012 A
(19) INDIA
(22) Date of filing of Application :04/05/2012 (43) Publication Date : 21/06/2013
(54) Title of the invention : SEALED COMPRESSOR
(51) International classification
:F04B (71)Name of Applicant :
39/00 1)PANASONIC CORPORATION
(31) Priority Document No
:2011- Address of Applicant :1006, OAZA KADOMA, KADOMA-
103985 SHI, OSAKA 571-8501 Japan
(32) Priority Date :09/05/2011 (72)Name of Inventor :
(33) Name of priority country :Japan 1)YAMAOKA, MASAKAZU
(86) International Application No
Filing Date
:NA
:NA
2)HAYASHI, YASUSHI
3)KATAYAMA, MAKOTO
(87) International Publication No : NA
(61) Patent of Addition to Application Number
Filing Date
:NA
:NA
(62) Divisional to Application Number
Filing Date
:NA
:NA
(57) Abstract :
A sealed compressor comprises an electric element; a compression element; and a sealed container accommodating the electric
element and the compression element; wherein the compression element includes a cylinder block defining a compression
chamber; a piston which is reciprocatable inside the compression chamber; and a valve plate disposed to close an opening end of
the compression chamber and having a discharge hole which provides communication between inside and outside of the
compression chamber; the piston has a first groove on a tip end surface thereof which faces the valve plate, the first groove having
a predetermined width and extending from an outer peripheral edge portion of the tip end surface toward a portion of the tip end
surface which faces the discharge hole; and a tip end portion of the first groove is positioned in the portion of the tip end surface
which faces the discharge hole and is inclined.
No. of Pages : 57 No. of Claims : 15
The Patent Office Journal 21/06/2013 13930