Rotary expansible chamber devices – Heat exchange or non-working fluid lubricating or sealing – Non-working fluid passage in inner working or reacting member
Reexamination Certificate
2005-08-16
2005-08-16
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
Heat exchange or non-working fluid lubricating or sealing
Non-working fluid passage in inner working or reacting member
C418S076000, C418S082000, C418S268000
Reexamination Certificate
active
06929457
ABSTRACT:
A rotary vane gas compressor has a cylinder, a rotor in the cylinder, and vanes slidably disposed in radial vane grooves in the rotor to define compression chambers for intaking, compressing and discharging compressed gas during rotation of the rotor. A flat groove communicates with bottom portions of the vane grooves during intaking and compression of the gas in the compression chambers, and a high pressure supplying hole communicates with the bottom portions of the vane grooves during end stage compression of the gas at times when the bottom portions of the vane grooves are not in communication with the flat groove. A communication passage establishes communication between the flat groove and the high pressure supplying hole at the start of operation of the gas compressor to supply high pressure gas to the vane groove bottom portions during start-up to quickly urge the vanes into contact with the cylinder.
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Kuwahara Okikazu
Matsuura Toshinari
Toyokata Tetsuya
Adams & Wilks
Calsonic Compressors Manufacturing Inc.
Trieu Theresa
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