Pumps – Expansible chamber type – Having pumping chamber pressure responsive distributor
Reexamination Certificate
2006-06-29
2010-12-28
Kramer, Devon C (Department: 3746)
Pumps
Expansible chamber type
Having pumping chamber pressure responsive distributor
Reexamination Certificate
active
07857605
ABSTRACT:
A liquid pump includes an electronically controlled throttle inlet valve to control pump output. With each reciprocation cycle, a plunger displaces a fixed volume of fluid. When less than this fixed volume is desired as the output from the pump, the electronically controlled throttle inlet valve throttles flow past a passive inlet check valve to reduce output. As a consequence, cavitation bubbles are generated during the intake stroke. Cavitation damage to surfaces that define the inlet port passage are avoided by a specifically shaped and sized cavitation flow adjuster extending from the valve member of the passive inlet check valve. By positioning the cavitation flow adjuster in the inlet port passage, a flow pattern is formed in a way to encourage cavitation bubble collapse away from surfaces that could result in unacceptable cavitation damage to the pump.
REFERENCES:
patent: 2130521 (1938-09-01), Brunner
patent: 4477236 (1984-10-01), Elliott
patent: 4889163 (1989-12-01), Engelbertsson
patent: 5018703 (1991-05-01), Goode
patent: 5101860 (1992-04-01), Stephenson
patent: 5683228 (1997-11-01), Beatty
patent: 5701873 (1997-12-01), Schneider
patent: 5931644 (1999-08-01), Glassey et al.
patent: 5980224 (1999-11-01), Regueiro
patent: 6544012 (2003-04-01), Blume
patent: 6623259 (2003-09-01), Blume
patent: 6895992 (2005-05-01), Yamaguchi et al.
patent: 7186097 (2007-03-01), Blume
patent: 7665976 (2010-02-01), Usui et al.
patent: 7744353 (2010-06-01), Yamada et al.
patent: 2004/0096346 (2004-05-01), Usui et al.
patent: 2004/0161353 (2004-08-01), Fabbri
patent: 0 816 672 (1998-01-01), None
patent: 1 013 922 (2000-06-01), None
patent: WO 2005/005830 (2005-01-01), None
Mack David C.
Stockner Alan R.
Tian Ye
Caterpillar Inc
Kramer Devon C
Lettman Bryan
Liell & McNeil
LandOfFree
Inlet throttle controlled liquid pump with cavitation damage... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Inlet throttle controlled liquid pump with cavitation damage..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inlet throttle controlled liquid pump with cavitation damage... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4206579