Pumps – Motor driven – Electric or magnetic motor
Patent
1994-09-06
1996-07-02
Freay, Charles
Pumps
Motor driven
Electric or magnetic motor
417DIG1, 921701, 92223, F04B 3504
Patent
active
055315747
ABSTRACT:
A closed-type compressor includes a closed casing accommodating an electric motor from which a rotational shaft extends and a compressing machine to be operated by the motor and the compressing machine is of a reciprocating-type and provided with sliding portions. A hydrofluorocarbon (HFC) refrigerant is used as a compressor refrigerant, and a refrigerator oil consisting essentially of ester is used as a lubricating oil. The sliding portions of the compressing machine each is formed of two members one of which is made of cast iron subjected to an insoluble film forming process using manganese phosphate and another one of which is made of carbon steel.
REFERENCES:
patent: 2996240 (1961-08-01), Stocklein et al.
patent: 4848213 (1989-07-01), Wood et al.
patent: 5199859 (1993-04-01), Kitaichi
patent: 5273410 (1993-12-01), Kitaichi et al.
patent: 5378123 (1995-01-01), Scuderi et al.
patent: 5408839 (1995-04-01), Kitaichi et al.
Freay Charles
Kabushiki Kaisha Toshiba
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