Pressure sealed tapered screw pump/motor

Rotary expansible chamber devices – Interengaging rotating members – Each tapered

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Pressure sealed tapered screw pump/motor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pressure sealed tapered screw pump/motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure sealed tapered screw pump/motor will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4205965

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.