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| Number | Title | Issue Date |
| 6201327 | System and method for absorbing the expansion and contraction of internal fluids of a sumergible electric motor A motor protector for use in protecting an electric motor in a subterranean environment. The motor protector utilizes a dual chamber system for absorbing the expansion and contraction of the internal fluids of a submergible electric motor. One of the cham... | 03/13/2001 |
| 5855472 | Diving bell submersible seal A submersible seal that operates in a substantially frictionless manner is provided for protecting a motor from liquid intrusion along the shaft. Motors of this type are commonly used, for example, in aerators, pumps, mixers, flow developers, and the like... | 01/05/1999 |
| 5431546 | Apparatus for intermittent transfer of fluid having vapor trap seal and vapor escape means Fluid transfer apparatus comprising a fluid reservoir and a pump connected to the reservoir by a supply line, wherein the apparatus is configured so that vapor generated in the pump during periods of inoperation may escape from the pump cavity through the... | 07/11/1995 |
| 4608157 | Wastewater treatment plant This disclosure is directed to a wastewater treatment plant which includes pretreatment, aeration, final clarification and overflow/backwash chambers adapted to receive a fluid, such as home wastewater, which is to be subjected to extended aeration or aer... | 08/26/1986 |
| 4505813 | Wastewater treatment plant This disclosure is directed to a wastewater treatment plant which includes pretreatment, aeration, final clarification and overflow/backwash chambers adapted to receive a fluid, such as home wastewater, which is to be subjected to extended aeration or aer... | 03/19/1985 |
| 4324534 | Power supply apparatus Power supply apparatus having a two part housing, the first part containing a motor in a gas environment and the second part containing a pump in a pressurized fluid environment, the second part having an inlet and outlet for passage of pressurized fluid ... | 04/13/1982 |
| 4309157 | Protection device and sump pump A protection column is employed about a sump pump to exclude liquid and foreign matter in the sump from entering the pump interior until a time just prior to priming and activation of the pump. The column has a closed bottom portion serving as a vessel an... | 01/05/1982 |
| 3999890 | Enclosed sump pump All of the components of a sump pump apparatus necessary to be in the sump are enclosed in a common case. In one embodiment, this case is of plastic and holds the motor means, the pump impeller and at least part of the water level sensors. The motor means... | 12/28/1976 |
