Pumps – Expansible chamber type – Plural pumping members in single pump chamber
Patent
1995-02-08
1996-08-06
Vrablik, John J.
Pumps
Expansible chamber type
Plural pumping members in single pump chamber
417487, 92 52, F04B 1900
Patent
active
055428274
ABSTRACT:
A multiple piston hand priming pump includes a plurality of nested pistons engaged within a hollow cylindrical housing. One end of the housing has an inlet/outlet fitting leading to a pumping chamber defined within the housing and the other end of the housing is closed. Through a center bore in the closed end of the housing, a plunger activating rod extends into communication with the centermost piston of the nested plurality of pistons. The nested pistons each engage within the next circumferential piston in a manner forming a lost motion connection therewith at the end of an axial bore in the next piston to cause sequential actuation after the pumping stroke of the inner piston is completed.
REFERENCES:
patent: 1969920 (1934-08-01), Andres
patent: 2380907 (1945-07-01), Hall
patent: 2420409 (1947-05-01), Bivans et al.
patent: 2434296 (1948-01-01), Swanson
patent: 2649842 (1953-08-01), Caldwell
patent: 2831464 (1958-04-01), Lillquist
patent: 3948589 (1976-04-01), DuBois
patent: 5065607 (1991-11-01), Kadis et al.
Heywood, "Internal Combustion Engine Fundamentals", 1988, p. 30.
Boone Theodore F.
Dombek Bruce B.
Kim Ted
Navistar International Transportation Corp.
Sullivan Dennis K.
Vrablik John J.
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