Pumps – Expansible chamber type – Plural pumping chambers
Patent
1990-11-02
1992-06-02
Bertsch, Richard A.
Pumps
Expansible chamber type
Plural pumping chambers
417536, 417568, 417454, 137541, 384 32, 384 42, F04B 2102
Patent
active
051182653
ABSTRACT:
A pumping apparatus comprises a piston/cylinder assembly mounted between two laterally spaced end cap sections attached to base means and including spring-loaded valve devices. A piston rod is movably supported in and extends outwardly from one of the end cap sections. A manually operated linkage mechanism effects axial longitudinal movement of the piston rod and a support mechanism maintains longitudinal axial alignment of the piston rod during its longitudinal axial movement. The longitudinal movement of the piston rod operates in concert with the spring-loaded valve devices to pump fluid manually when the pumping apparatus is positioned in any angular disposition with respect to the horizontal.
REFERENCES:
patent: 523240 (1894-07-01), Rodenbaugh
patent: 796996 (1905-08-01), Gibson
patent: 1539556 (1925-05-01), Garber
patent: 1641717 (1927-09-01), Welter
patent: 3727636 (1973-04-01), Simmons
patent: 3791775 (1974-02-01), Bocknak et al.
patent: 4013138 (1977-03-01), McBurnett
patent: 4826046 (1989-05-01), Rudick
patent: 4890937 (1990-01-01), Balsells
Bertsch Richard A.
Freay Charles
Markva Neil F.
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