发明名称 |
Dual stage pump system with pre-stressed diaphragms and reservoir |
摘要 |
An improved dual-stage pump system is provided for the accurate pumping and filtering of viscous fluids. Two hydraulically activated pumps are provided in series with a filter and reservoir disposed in-line between the two pumps. The reservoir acts as a source bottle for the second pump and allows the first pump to pump the viscous fluid through the filter at a rate independent of the dispensing rate of the second pump. By operating the first pump at a rate independent of the second pump, back pressure at the filter is avoided. Each hydraulically activated diaphragm pump is equipped with an improved diaphragm that is pre-formed to the geometries of the process fluid cavity thereby eliminating any inaccuracies in the operation of the pumps due to expansion of retraction of the diaphragm during pump operation.
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申请公布号 |
US6190565(B1) |
申请公布日期 |
2001.02.20 |
申请号 |
US19980093419 |
申请日期 |
1998.06.08 |
申请人 |
BAILEY DAVID C.;MARTIN CARL A. |
发明人 |
BAILEY DAVID C.;MARTIN CARL A. |
分类号 |
F04B23/02;F04B23/06;F04B43/00;F04B43/073;F04B49/02;F04B53/20;(IPC1-7):B01D17/12 |
主分类号 |
F04B23/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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