Liquid and air mixing gear pump |
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| 申请号 | US3764238D | 申请日 | 1972-01-24 | 公开(公告)号 | US3764238A | 公开(公告)日 | 1973-10-09 |
| 申请人 | CARPIGIANI P; | 发明人 | CARPIGIANI P; | ||||
| 摘要 | The air intake ports of a liquid and air sucking and mixing gear pump are put into communication with the atmosphere through a collecting tank or chamber, in which the small amounts of foamy liquid-and-air emulsion flowing out from said ports during the stopping time of the pump are collected, and from which the amounts of emulsion are again sucked back into the pump as soon as the pump operation is again started. | ||||||
| 权利要求 | 1. In a gear pump for the feeding of liquid-and-air mixes, which comprises a liquid intake port upstream of the region in which the pump gears are in mesh, a liquid-and-air emulsion delivery port downstream of the region in which the pump gears are in mesh, and two air intake ports, one for each one of the pump gears, to be disposed on the gear path between the liquid intake port and the emulsion delivery port, the improvement comprising a collecting chamber, and wherein said air intake ports are put into communication with the atmosphere through said collecting chamber. 2. A gear pump according to claim 1, wherein said collecting chamber is formed in the pump body itself and is constituted by a substantially vertically running tubular duct communicating at its lower end with each one of the intake ports and, at its top, with the atmosphere. |
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