Rotary expansible chamber devices – Grooved abutting cylinder-rotating member end surfaces – Non-working fluid directed to groove
Reexamination Certificate
2006-12-19
2006-12-19
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
Grooved abutting cylinder-rotating member end surfaces
Non-working fluid directed to groove
C418S082000, C418S093000, C418S268000
Reexamination Certificate
active
07150610
ABSTRACT:
To reduce an excessively high vane back pressure to an appropriate pressure to thereby relieve operational load, and to improve the vane projectability at the start and during low speed operation to thereby prevent chattering; There are provided back pressure spaces including the bottom portion of vane grooves and attaining a middle pressure between suction pressure and discharge pressure during normal operation of the compressor main body, a first high pressure oil passage establishing communication between an oil sump and the vane groove bottom portions when the vanes are in their discharge stroke positions, second high pressure oil passages establishing communication between the oil sump and the back pressure spaces, and an opening/closing valve for opening and closing the second high pressure oil passages.
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Kuwahara Okikazu
Morita Keiichi
Takahashi Toru
Adams & Wilks
Calsonic Compressor Inc.
Trieu Theresa
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