Pumps – Correlated pump and motor or clutch control – Pump distributor control
Patent
1974-11-12
1976-11-30
Cohan, Alan
Pumps
Correlated pump and motor or clutch control
Pump distributor control
417342, 417344, F04B 910
Patent
active
039946274
ABSTRACT:
A pumping apparatus for wet concrete and the like comprising a pair of piston pumps having parallel axes, interlocked to one another and operating in phase opposition, the orifices of which are alternatively put in communication one with the conduit feeding the wet concrete and the other with the delivery conduit and vice versa by means of a reciprocally movable baffle blade valve having two operative limit positions, characterized by the fact that the pump pistons are each actuated by a single-acting jack, being provided means to at first move the baffle valve into either of its operative positions by means of a hydraulic control device, and then to actuate the jack which is about to begin its intake stroke only when the baffle blade valve has reached one of the limit positions, and to reverse the position of said baffle valve into its second limit position before the beginning of the compression stroke of the pump actuated by said jack and vice versa, and means for interlocking the movements of the jacks, and thus of the pumps connected therewith.
REFERENCES:
patent: 1543201 (1925-06-01), Bell
patent: 2579568 (1951-12-01), Habenicht
patent: 2942553 (1960-06-01), Moeller
patent: 3279382 (1966-10-01), Bennett
patent: 3326135 (1967-06-01), Smith
patent: 3327634 (1967-06-01), Whiteman
patent: 3327641 (1967-06-01), Klosterman
Cohan Alan
Fogt Industriemaschinenvertretung A.G.
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