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Patent Searching and Data


Title:
REFRIGERANT PUMP
Document Type and Number:
Japanese Patent JP2003314469
Kind Code:
A
Abstract:

To solve problems in a conventional refrigerant pump wherein an intermediate shell is provided to ease distortion in welding, but the number of parts is increased and the tolerance of each part is accumulated to make centering of a drive shaft and a bearing difficult, and if integrated in the eccentric state, rotational torque becomes large to impede smooth rotation, and further drawing had to be performed, while securing dimensional accuracy because the whole periphery is formed of a thin-walled closed container, which results in difficult processing.

A pump mechanism part is mounted inside a thick-walled closed container, and the thick-walled closed container is inserted in the thin-walled closed container and welded. If the dimensional accuracy of the thick-walled closed container is improved with this constitution, centering is facilitated.


Inventors:
NAKANO MASAO
ASHITANI HIROMASA
Application Number:
JP2002121920A
Publication Date:
November 06, 2003
Filing Date:
April 24, 2002
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
F04C2/10; F04C11/00; F04C15/00; (IPC1-7): F04C15/00; F04C2/10
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)