Marine engine cooling water filter cleaning system
US4160733A · kind A · utility
Inventor
Key dates
| Filing date | Feb 6, 1978 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | Feb 6, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/165
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention pertains to an engine installation using marine water as a coolant and having an intake conduit system for drawing marine water to the engine including a strainer at the inlet and a filter between the strainer and the water pump. To clean the filter and strainer which periodically becomes clogged with foreign matter while the engine is operating, a valve mechanism is provided between the filter and the water pump which is operative to close the conduit to the pump and to admit compressed air to the filter side of the valve mechanism for a short time to blow back the clogging material from the filter and strainer to the sea. In a semi-automatic embodiment the valve mechanism is a solenoid operated 3-way valve which is preferably operated from the pilot house for a short interval of about 10 seconds when the boat operator observes an above normal engine temperature. In an automatic embodiment a heat sensor associated with the engine energizes the solenoid circuit when a predetermined above normal temperature is reached and a cycle timer in the circuit controls the solenoid operation through predetermined ON and OFF periods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.