Pumps – Expansible chamber type – Having means for holding pressure responsive distributor open
Patent
1990-11-09
1992-10-13
Bertsch, Richard A.
Pumps
Expansible chamber type
Having means for holding pressure responsive distributor open
417454, 1374544, 137332, 92255, F04B 700
Patent
active
051545896
ABSTRACT:
A metering pump wherein the head is provided with internal threads terminating adjacent to internal shoulders at each of the pump cylinder, inlet valve and outlet valve ports. The cylinder, inlet valve and outlet valve each include a flange secured to the shoulder by a collar threadably received in each of the ports. O-rings are provided in a circumferential groove in the body or cylinder of the pump inlet valves and outlet valves downstream of the flange. A piston pump structure includes a bushing mounted to the piston rod between the piston head and a second breakaway stop connected to the piston rod. The piston head includes a plurality of circumferential grooves for receiving respectively a cup seal or an O-ring seal. A suck-back mechanism is provided in a bore in the head and includes a stem having an eccentric cam which interacts with the valve structure to adjust the degree of closure by rotation of the stem.
REFERENCES:
patent: 867997 (1907-10-01), Nelson et al.
patent: 1149279 (1915-08-01), Nelson
patent: 1195395 (1916-08-01), Preston
patent: 1441646 (1923-01-01), Vaughan
patent: 1919696 (1933-07-01), George
patent: 2045196 (1936-06-01), Mohr
patent: 2109785 (1938-03-01), Starr
patent: 2564830 (1951-08-01), Bremser
patent: 2679441 (1954-05-01), Stillwagon
patent: 2807213 (1957-09-01), Rosen
patent: 2907614 (1959-10-01), Rosen
patent: 2978149 (1961-04-01), Rosen
patent: 2978283 (1961-04-01), Rosen
patent: 3069178 (1962-12-01), Rosen
patent: 3157191 (1964-11-01), Garrett et al.
patent: 3197285 (1965-07-01), Rosen
patent: 3425410 (1969-02-01), Cammack
patent: 3771908 (1973-11-01), Rosen
patent: 4055281 (1977-10-01), Rosen et al.
patent: 4208953 (1980-06-01), Prusic
patent: 4230160 (1980-10-01), Buckley
patent: 4569378 (1986-02-01), Berganty
patent: 4610377 (1986-09-01), Radmussen
patent: 4650151 (1987-03-01), McIntire
"Duckbills" 1982 Vernay Laboratories, Inc.
Bennett Richard N.
Bronw, Jr. John M.
Hamilton William M.
Ruhl Mark A.
Bertsch Richard A.
Kocharov Michael I.
National Instrument Company
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