The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 1990
Filed:
Mar. 01, 1989
Henning M Ejlersen, DK-2950 Vedb k, DK;
Other;
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.