Rotary expansible chamber devices – Working member has planetary or planetating movement – With relatively movable partition member
Patent
1996-11-05
1998-07-07
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
With relatively movable partition member
418270, 137539, 137856, F04C 18356, F16K 1504
Patent
active
057758948
ABSTRACT:
In a refrigerant compressor, a discharge valve assembly which reduces reexpansion volume. The present invention provides a discharge valve assembly for reciprocating, rotary, and scroll types of compressors, and includes a spherical valve member that engages and penetrates a discharge port provided on a compressor cylinder head, valve plate or scroll plate. The discharge port is formed in the cylinder head or scroll plate and is dimensioned such that the spherical member penetrates and substantially fills the discharge port. The reexpansion volume within the discharge port is thereby reduced. To maintain engagement of the spherical member with the discharge port, an elastically deformable arm having an aperture is positioned to hold the spherical member in the discharge port. The arm is elastically deformable to allow the spherical valve member to move out of engagement with the discharge port during the compression phase of the compressor. To prevent the spherical member from being discharged along with the compressed refrigerant, a rigid stop plate is disposed adjacent the deformable arm to engage the spherical member during the compression phase and thereby limit the movement of the spherical valve member.
REFERENCES:
patent: 640488 (1900-01-01), Philpott
patent: 1582928 (1926-05-01), Hoag
patent: 1652978 (1927-12-01), Enock
patent: 3768509 (1973-10-01), Goda
patent: 4714416 (1987-12-01), Sano
patent: 4892468 (1990-01-01), Maehara
patent: 5346373 (1994-09-01), Riffe
patent: 5421368 (1995-06-01), Maalouf et al.
Tecumseh Products Company
Vrablik John J.
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