Patent EA-001236-B1 (EA)
Title: A pump device
IPC: F04F7/02
Filed: 1997-10-23
Abstract: 1. A pump device, comprising a supply tube (1) for a liquid with a relatively low head, an accumulator (3) connected to the same via a non-return valve (2), an outlet tube (4) from the accumulator for liquid with a relatively high head, and an outlet valve, provided at the supply tube (1) after the accumulator, which outlet valve opens and shuts an outlet (5) at the supply tube (1), characterized in that the outlet valve comprises a damper (6) movable between a position, in which the opening (5) is left open, and a position, in which the opening (5) is closed. 2. A pump device according to claim 1, characterized in that the damper (6) is arranged journalled around a first axis (7) and is provided with a variable first weight (8), which gives a torque acting in the direction towards the open position of the outlet. valve and thus influences the time interval between the opening and closing of the outlet valve. 3. A pump device according to claim 1 or 2, characterized in that a vessel (9) is provided, cooperating with the outlet valve, which vessel is movable between a first position and a second position, whereas the outlet valve in the first position is kept open, when the vessel collects flowing liquid from the outlet, until the collected liquid brings the vessel to take the second position in which the outlet valve is kept closed, until the liquid flows out from the vessel (9), whereby the vessel will return to its first position. 4. A pump device according to any of claims 1 to 3, characterized in that the vessel (9) is provided with a second variable weight, which gives a torque in the direction towards the first position of the vessel, and thus influences the time interval between the open and closed positions of the outlet valve. 5. A pump device according to any of claims 1 to 4, characterized in that the damper (6) is fixed to the vessel (9) with a firm connection. 6. A pump device according to claim 5, characterized in that a bow bar (10) is fixed to the vessel (9), provided to guide liquid, flowing from the outlet, to the vessel (9). 7. A pump device according to claim 5, characterized in that a paddle wheel (11) is provided in such a way, journalled in a house (12), that liquid, flowing from said outlet brings the paddle wheel (11) to rotate and thereby transport the liquid to the vessel (9). 8. A pump device according to any of claims 5 to 7, characterized in that a vessel (13) with a relatively small outlet opening (14) is provided to be filled with outflowing liquid, and is arranged to act, in an emptied condition, upon the outlet valve in the direction towards its open position. 9. A pump device according to any of claims 1 to 3, characterized in that the damper (6) is swingable around a second axis (15) between its open and closed positions, and that the vessel (9) is provided with a first element (16), which when the vessel (9) moves from its said first position to its second position acts upon a second element (17) at the damper (6) in order to close the outlet valve. 10. A pump device according to claim 9, characterized in that a guide rail (18) is provided to guide liquid to said second axis (15). 11. A pump device according to any of the preceding claims, characterized in that the non- return valve consists of an opening (19) in the bottom of the accumulator (3), cooperating with a plate (20) which at the lower side is provided with an elastic, sealing membrane (21), the plate being so guided, that it may be lifted at one end, opening a relatively limited passage, and that it may be lifted at the other end, opening a relatively seen larger passage. 12. A pump device according to any of the preceding claims, characterized in that the accumulator (22) is provided with a piston (23), arranged to glide in same, which piston is designed with a relatively seen smaller surface (24), turned towards the liquid, coming from the supply tube (1), and a relatively seen larger surface (25), turned towards a room (26), to which is fed gas, preferably air of a relatively low pressure via a first valve (27), and which gas is compressed by the movement of the piston (23), created by the pump device, which compressed gas flows through a valve (28) to a user.