Variable volume positive displacement rotary pump

Details Variable volume positive displacement rotary pump Variable volume positive displacement rotary pump

1980-03-21

1984-03-20

Croyle, Carlton R.

Pumps

Expansible chamber type

Moving cylinder

F04B 1902

Patent

active

044378165

ABSTRACT:
A tubular cylinder block is mounted for rotation about its axis within a cylindrical bore of a pump housing. The pump housing has circumferentially spaced inlet and outlet ports opening radially to the bore. Right angle intersecting diametric passages extend through the cylinder block and are alignable with the inlet and outlet ports during rotation of the drive block, the diametric passages being square in cross-section, and piston members of corresponding square transverse cross-section are slidably positioned within respective diametric passages with the piston members bearing square slots within side faces thereof intermediate of their ends facing axially. A square drive block is carried commonly within the piston member slot whose axis of rotation is adjusted eccentrically relative to the axis of rotation of the cylinder block. Cylinder block internal peripheral grooves separated by lands control fluid passage via the piston formed cavities between the inlet and outlet ports.

REFERENCES:
patent: 1729764 (1929-10-01), Dinesen
patent: 2248452 (1941-07-01), Erickson
patent: 2277991 (1942-03-01), Leonard
patent: 2510903 (1950-06-01), Quiroz
patent: 2551430 (1951-05-01), Estey
patent: 2977891 (1961-04-01), Bishop
patent: 3093381 (1963-06-01), Schulz
patent: 4264283 (1981-04-01), Gaffney

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