Rotary expansible chamber devices – Interengaging rotating members – Each tapered
Reexamination Certificate
2006-03-09
2010-11-09
Trieu, Theresa (Department: 3748)
Rotary expansible chamber devices
Interengaging rotating members
Each tapered
C418S009000, C418S144000, C418S195000, C418S201100
Reexamination Certificate
active
07828535
ABSTRACT:
A fluid pump (10) or motor (100) includes a pair of enmeshed tapered rotors (22,24,122,124) having intersecting axes of rotation. The first rotor (22,122) includes a small low pressure end (34,54,134,154) and a larger high pressure end (32,52,132,152) and a spiral thread (36,56,136,156) that increases in width and depth as it progresses from the high pressure end (28,128) to the low pressure end (26,126). The second rotor (24,124) enmeshes with the first rotor (22,122), and has an identical structure, except that its threads (36,56,136,156) progress in the opposite direction. Both rotors (22,24,122,124) are mounted on sliding splines (42,62,142,162) which permit them to move, to a limited extent, into and out of their respective receiving cavities. The pressure on the high side (28,128) of the pump (10) or motor (100) tends to urge the rotors (22,122,24,124) against the walls (16,20,116,120) of the receiving cavities thereby improving their sealing capabilities and the overall efficiency of the pump (10) or motor (100) as a whole.
REFERENCES:
patent: 3116871 (1964-01-01), Mishina et al.
patent: 4792294 (1988-12-01), Mowli
patent: 4952125 (1990-08-01), Nagai
patent: 5533887 (1996-07-01), Maruyama
patent: 6019586 (2000-02-01), Liou
patent: 6129534 (2000-10-01), Schofield et al.
patent: 6217305 (2001-04-01), Schofield et al.
patent: 6257839 (2001-07-01), Fang et al.
patent: 6379135 (2002-04-01), Schofield et al.
patent: 6672855 (2004-01-01), North
patent: 2001/0024620 (2001-09-01), North
patent: 2001/0041145 (2001-11-01), North
patent: 2001/0051101 (2001-12-01), Schofield
patent: 19820523 (1999-11-01), None
patent: 1 130 263 (2001-09-01), None
patent: 789211 (1935-10-01), None
patent: 2684417 (1993-06-01), None
patent: 01267384 (1999-10-01), None
patent: 2000 073976 (2000-03-01), None
patent: 2001 304156 (2001-10-01), None
FR 789211 A—English Translation.
Fonseca Perry M.
Fox Rothschild LLP
Trieu Theresa
Woodbridge Richard C.
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