One-piece pumping device with ambivalent operation
First Claim
Patent Images
1. A pumping device having two modes of operation and including at least two centrifugal pump elements connected to a single device motor characterized by:
- a one-piece structure for said pumping device, said one-piece structure including means for providing serial or parallel coupling configurations for said centrifugal pump elements; and
means for changing from one of said coupling configurations to the other;
wherein said one-piece structure comprises;
a central member including said drive motor;
a first end member fixedly mounted to and communicating with said central member and including a first continuous recess for receiving a first one of said at least two centrifugal pump elements;
a second end member detachably mounted to and communicating with said central member and including a second continuous recess for receiving a second one of said at least two centrifugal pump elements, said drive motor including a drive shaft with said at least two centrifugal pump elements being co-axially mounted to opposite ends of said shaft, said central member and said first and second end members being co-axially positioned with respect to said drive shaft, said configuration changing means comprising;
means for releasably securing said second end member to said central member in either of two different positions, each of said positions corresponding to one of the coupling configurations of the pump elements and hence to one of the two operating modes.
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Accused Products
Abstract
A single motor 25 simultaneously drives two pump elements mounted on its shaft ends. The hydraulic circuit, the motor and the pump elements are contained within a one-piece 3-part assembly comprising a central part 2 placed between two end parts 1 and 3. It is merely necessary to change the relative orientation of one of the end parts, the movable part 1, through 180° in order to couple the two pump elements in series or in parallel as required. The pumping device operates immersed.
Suitable for several applications to meet domestic and light industrial requirements.
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Citations
9 Claims
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1. A pumping device having two modes of operation and including at least two centrifugal pump elements connected to a single device motor characterized by:
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a one-piece structure for said pumping device, said one-piece structure including means for providing serial or parallel coupling configurations for said centrifugal pump elements; and means for changing from one of said coupling configurations to the other; wherein said one-piece structure comprises; a central member including said drive motor; a first end member fixedly mounted to and communicating with said central member and including a first continuous recess for receiving a first one of said at least two centrifugal pump elements; a second end member detachably mounted to and communicating with said central member and including a second continuous recess for receiving a second one of said at least two centrifugal pump elements, said drive motor including a drive shaft with said at least two centrifugal pump elements being co-axially mounted to opposite ends of said shaft, said central member and said first and second end members being co-axially positioned with respect to said drive shaft, said configuration changing means comprising; means for releasably securing said second end member to said central member in either of two different positions, each of said positions corresponding to one of the coupling configurations of the pump elements and hence to one of the two operating modes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification