Pumps – Expansible chamber type – Having pumping chamber pressure responsive distributor
Patent
1991-01-02
1992-01-07
Bertsch, Richard A.
Pumps
Expansible chamber type
Having pumping chamber pressure responsive distributor
13751215, F04B 2102
Patent
active
050785826
ABSTRACT:
A valve plate accommodated in a reciprocatory piston type compressor and arranged between an axial end of a cylinder block provided with a plurality of cylinder bores in which a plurality of double-headed pistons are reciprocated to compress a refrigerant gas, and a housing member provided with a suction chamber and a discharge chamber. The valve plate is provided with a plurality of suction ports communicating between the suction chamber and the plurality of cylinder bores and openably closed by suction valves, and a plurality of discharge ports communicating between the discharge chamber and the plurality of cylinder bores of the cylinder block. The valve plate is provided with surface portions extended around each of the discharge ports to be cooperable with the spring steel discharge valves for opening and closing the discharge ports, and formed to have 10 through 20 Rz surface roughness and a Vicker's hardness of 120 through 450.
REFERENCES:
patent: 2151746 (1939-03-01), Cody
patent: 4911614 (1990-03-01), Kawai et al.
patent: 4976284 (1990-12-01), Hovarter
Ikeda Hayato
Kawamura Hisato
Ohbayashi Masakazu
Umemura Satoshi
Bertsch Richard A.
Freay Charles
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
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