Pumps – Expansible chamber type – Mechanically actuated distributor
Patent
1995-03-20
1998-02-17
Thorpe, Timothy
Pumps
Expansible chamber type
Mechanically actuated distributor
417503, 417519, 13762521, F16H 3910
Patent
active
057185700
ABSTRACT:
A reciprocating piston pump provides pulsation free delivery of liquid. It is suitable for use in compact environments or for the delivery of small amounts of liquid, as in chromatographic analysis devices. The pump includes two pistons with pumping chambers that are alternately connected to inflow and outflow lines through a control valve. The control valve moves between a first position in which inflow is directed to the first piston chamber and outflow to the second piston chamber, and a second position in which outflow is directed to the first piston chamber and inflow is directed to the second piston chamber. Each outflow pulse from the piston is sustained longer than each inflow pulse, and the outflow pulses are staggered and partially superimposed to provide substantially pulsation free delivery of liquid from the pump. A rotating cam moves the pistons of the pumps and the control valve between their operating positions described above. The cam rotates at a constant speed around an axis that is parallel to the axis of movement of the piston pumps.
REFERENCES:
patent: 646024 (1900-03-01), Goodhart
patent: 1506892 (1924-09-01), Egersdorfer
patent: 1519670 (1924-12-01), Danstrup
patent: 1723874 (1929-08-01), Lunge
patent: 2010377 (1935-08-01), Sassen
patent: 2225788 (1940-12-01), McIntyre
patent: 2397594 (1946-04-01), Buchanan
patent: 2458294 (1949-01-01), Parker
patent: 2600099 (1952-06-01), Detrez
patent: 2745350 (1956-05-01), Capsek
patent: 3272079 (1966-09-01), Bent
patent: 3302528 (1967-02-01), Rosenhaft
patent: 3451428 (1969-06-01), Pruett
patent: 3702143 (1972-11-01), Van Wagenen et al.
patent: 3720353 (1973-03-01), Stettler
patent: 3816029 (1974-06-01), Bowen et al.
patent: 3823557 (1974-07-01), VanWagenen et al.
patent: 4028018 (1977-06-01), Audsley
patent: 4359312 (1982-11-01), Funke et al.
patent: 4432310 (1984-02-01), Waller
patent: 4556371 (1985-12-01), Post
patent: 4687426 (1987-08-01), Yoshimura
patent: 5261451 (1993-11-01), Spencer
Beckett Carl D.
O'Hara Kevin
Olsen Daniel B.
Kim Ted
Micropump Corporation
Thorpe Timothy
LandOfFree
Rotary control valve for a piston pump does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary control valve for a piston pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary control valve for a piston pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1779538