Pumps – Expansible chamber type – Elongated flexible chamber wall progressively deformed
Patent
1989-03-01
1990-05-08
Stout, Donald E.
Pumps
Expansible chamber type
Elongated flexible chamber wall progressively deformed
417476, F04B 4312
Patent
active
049233750
ABSTRACT:
A hose pump (1) consisting of a hose (2), at least one, preferably two pressure rollers (3,4), a support plate (9) and a drive source (26). The hose (2) is paced in a hose receiving track (6) in the support plate (9). The rollers (3,4) are rotatably journalled on a common rotary shaft (10), whose center (11) is firmly connected with a drive shaft (12), which is perpendicular to the support face (5) of the support plate (9) engaging the rollers (3,4). The rollers (3,4) act on the hose (2) in the flow direction of the pump (1) and alternately determine, in specific angle ranges, the liquid volume flow discharged. The succeeding roller (4) cooperates with the hose (2) in such a manner that the hose is completely closed when the forwardly disposed roller (3), as seen in the flow direction, initiates its disengaging movement away from the hose (2). During the following opening movement of the forwardly disposed roller (3) from having closed the hose (2) completely to letting it be completely open, the succeeding roller (4) cooperates with the hose (2) so that hose, in addition to discharging a volume flow corresponding to the normal volume flow of the pump (1), also discharges an additional volume flow to compensate for the loss caused by the opening movement of the forwardly disposed roller (3). Then, the volume flow discharged by the pump (1) is constant per unit of time. Further, reverse suction in the outlet end of the hose is obviated.
REFERENCES:
patent: 819690 (1906-05-01), Bryson
patent: 922205 (1909-05-01), Still
patent: 2917002 (1959-12-01), Mascaro
patent: 2925045 (1960-02-01), Mascaro
patent: 3724974 (1973-04-01), Molimard
patent: 3787148 (1974-01-01), Lopf
patent: 4397617 (1983-08-01), Sergio et al.
patent: 4492538 (1985-01-01), Iwata
patent: 4573887 (1986-03-01), Smith
EP Al, 0 026 704 and a Search Report EP 80 40 1357 Contained Therein.
Stout Donald E.
Szczecina Jr. Eugene L.
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