Pumping device having inlet and outlet valves adjacent opposed sides of a tube deforming device
First Claim
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1. A pumping device comprising:
- means for accommodating a length of tubing providing, in operation, passage for liquid through said device,means for deforming said tubing whereby to reduce its volume, andcontrollable valve means including independently controlled valve actuators provided adjacent opposed sides of said deforming means for restricting the flow of liquid through said tube,wherein said deforming means comprises members arranged for controlled relative movement in opposed directions in parallel planes transverse to the direction of liquid passage within said tubing, said members adapted to engage said tubing between said actuators, whereby said tubing is first deformed in one transverse direction and then in the opposed transverse direction which tends to restore the original cross-sectional shape of said tubing, andcontrol means for controlling said value actuators to open and close in synchronism with deforming of said tubing so that liquid is displaced from an outlet side of said tubing as a function of change of volume of the tubing during deformation.
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Abstract
A pumping device controlling an amount of liquid passing through a length of tubing accommodated in the pumping device. The pumping device includes inlet and outlet valves located adjacent opposed sides of a tube deforming device. The valves are controllable for restricting the flow of liquid through the tubing, and the deforming device is such that the tubing is first deformed in one direction and then in another direction which tends to restore the original cross-sectional shape of the tubing.
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Citations
34 Claims
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1. A pumping device comprising:
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means for accommodating a length of tubing providing, in operation, passage for liquid through said device, means for deforming said tubing whereby to reduce its volume, and controllable valve means including independently controlled valve actuators provided adjacent opposed sides of said deforming means for restricting the flow of liquid through said tube, wherein said deforming means comprises members arranged for controlled relative movement in opposed directions in parallel planes transverse to the direction of liquid passage within said tubing, said members adapted to engage said tubing between said actuators, whereby said tubing is first deformed in one transverse direction and then in the opposed transverse direction which tends to restore the original cross-sectional shape of said tubing, and control means for controlling said value actuators to open and close in synchronism with deforming of said tubing so that liquid is displaced from an outlet side of said tubing as a function of change of volume of the tubing during deformation.
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2. A pumping device comprising:
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means for accommodating a length of tubing providing, in operation, passage for liquid through said device, means for deforming said tubing to reduce its volume locally, inlet and outlet independently controlled valve means provided adjacent opposed sides of said deforming means for restricting the flow of liquid through said tubing, and control means arranged to control the operation of said deforming means and said valve means such that at times when said tubing is being deformed by said deforming means to reduce the volume of liquid locally, the inlet valve means is in a condition of increased flow and liquid is thereby displaced from an outlet of the tubing and at times when said volume is being locally restored the outlet valve means is in a condition of restricted flow whilst the inlet valve means is in a condition of increased flow, and wherein said deforming means comprises members arranged for controlled relative movement in opposed directions in parallel planes transverse to the direction of liquid passage within said tubing, said members adapted to engage said tubing between said actuators, whereby said tubing is first deformed in one transverse direction and then in the opposed transverse direction which tends to restore the original cross-sectional shape of said tubing. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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- 14. A pumping device comprising means for accommodating a length of tubing providing, in operation, passage for liquid through said device, means for deforming said tubing to reduce its volume locally, inlet and outlet controllable valve means provided adjacent opposed sides of said deforming means for restricting the flow of liquid through sad tubing and control means arranged to control the operation of said deforming means and said valve means whereby at times when said tubing is being deformed by said deforming means the inlet valve means is in a condition of restricted flow whilst the outlet valve means is in a condition of increased flow and at times when said volume is being restored the outlet valve means is in a condition of restricted flow whilst the inlet valve means is in a condition of increased flow, and wherein said deforming means comprises two members each having a series of transverse blades or ridges shaped to provide a valley through which said tubing may pass, one of said members being inverted relative to the other with its ridges interdigitated with the ridges of the other, said two members being arranged to move relative to one another in a direction transverse to the direction of passage of said tubing through said two valleys whereby to deform said tubing.
Specification