Concrete pump

Details Concrete pump Concrete pump

1979-06-25

1981-12-01

Freeh, William L.

Pumps

Expansible chamber type

Mechanically actuated distributor

13762543, F04B 702

Patent

active

043033784

ABSTRACT:
A fluid operated pump for concrete and similar materials comprising a pair of piston-cylinder units connected to a concrete housing having a single valve for controlling the charging and discharging of the material. The valve control element and the concrete housing are defined in a mating relationship for minimizing flow restrictions of the material moved through the housing. Other efficiencies in the fluid circuit structures and arrangements are provided.

REFERENCES:
patent: Re26820 (1970-03-01), Bennett
patent: 2825955 (1958-03-01), Ede
patent: 3194271 (1965-07-01), Viessmann
patent: 3295554 (1967-01-01), Huppert
patent: 3545893 (1970-12-01), Schlecht
patent: 3628897 (1971-12-01), Stetter
patent: 3703910 (1972-11-01), Smith
patent: 3741691 (1973-06-01), Schwing
patent: 3771908 (1973-11-01), Rosen
patent: 4057373 (1977-11-01), Schwing
patent: 4167374 (1979-09-01), Smith
patent: 4191513 (1980-03-01), Schwing

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