Pumps – Expansible chamber type – Valve in collapsible wall pumping member
Patent
1976-04-14
1978-06-27
Freeh, William L.
Pumps
Expansible chamber type
Valve in collapsible wall pumping member
417525, F04B 4302, F04B 2104
Patent
active
040972038
ABSTRACT:
A pump having a body including at least two axially aligned pumping chambers each of which contains an actuator having a main central rigid portion and a peripheral sealing ring retained in a clearance space and under radial compression in non-sliding fluid-tight relation between the main central portion and a lateral wall of the pumping chamber, such main central portions of the actuators being joined by a rigid connecting rod having further sealing rings embracing it and engaged with the side walls of respective pumping chambers to form a resiliently supported unit which is reciprocable axially of the pumping chambers and is driven by provision of contact faces on the connecting member spaced apart along said axis and facing in opposite directions, and between which is received the outer race of an anti-friction bearing carried on an eccentric of a drive spindle mounted for rotation in the pump body at right angles to the pumping chamber axis.
REFERENCES:
patent: 1818413 (1931-08-01), Luitwieler
patent: 2697403 (1954-12-01), Benedek
patent: 2962904 (1960-12-01), Soccart
patent: 3307492 (1967-03-01), Selwood et al.
Axtell Martin John Shelley
Axtell, executor by Martin John Shelly
Burton John David
Selwood Timothy John
Selwood, deceased Peter Richard
Freeh William L.
William R. Selwood Limited
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