Pumps – Three or more cylinders arranged in parallel – radial – or...
Patent
1998-04-20
2000-02-08
Jeffery, John A.
Pumps
Three or more cylinders arranged in parallel, radial, or...
417560, 1375124, F04B 112
Patent
active
060221992
ABSTRACT:
A reciprocating compressor is provided. Compression chambers are formed on at least one end of pistons slidably received within respective cylinder bores of a cylinder block. A cylinder head is secured to the cylinder block and has a high-pressure chamber and a low-pressure chamber formed therein. A separating member is arranged between the cylinder block and the cylinder head. The separating member has a valve sheet, a valve plate, a stopper plate. The valve sheet is formed with suction valves and discharge valves. The valve plate is arranged between the valve sheet and the cylinder block, and formed with refrigerant outlet ports and relief holes each opening into a corresponding one of the compression chambers, for communicating with a corresponding one of refrigerant inlet ports formed through the stopper plate when the corresponding suction valve opens. The relief holes and/or refrigerant outlet ports each have a projecting portion formed integrally with a portion of a rim of an opening thereof in a manner bent in a direction of thickness of the valve plate. The stopper plate is arranged between the valve sheet and the cylinder head and formed with the refrigerant inlet ports, refrigerant outlet passages each opening into the high-pressure chamber for communicating with a corresponding one of the refrigerant outlet ports when a corresponding one of the discharge valves opens, and stoppers each setting a limit to an amount of opening of a corresponding one of the discharge valves.
REFERENCES:
patent: 5477773 (1995-12-01), Murakami et al.
patent: 5483867 (1996-01-01), Ikeda et al.
patent: 5709535 (1998-01-01), Enomoto et al.
patent: 5878649 (1999-03-01), Raab
Arai Katsuhiko
Enomoto Katsutoshi
Ichikawa Hisao
Yoshii Kiyoshi
Jeffery John A.
Patel Vinod D
Zexel Corporation
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