Patent Number: 6,251,265

Title: Pressure regulating sludge filter

Abstract: A combination coolant filter and pressure regulator for an automotive engine's cooling system is configured to be spliced in line with the coolant supply line to the heater core. The filter has a housing and a filter element that is moveable within the housing between a first position opening up communication through the housing and a second position restricting communication through the housing. A spring biases the filter element toward its first position. Normal coolant flow through the housing passes through the filter for removal of entrained contaminants. Under conditions of high coolant flow and thus high pressures, the filter element moves against the bias of the spring toward its second position restricting coolant flow and protecting the heater core from damage due to coolant overpressure.

Inventors: Stein; Myron (Leguna Niguel, CA)


International Classification: B01D 29/11 (20060101); B01D 35/147 (20060101); B01D 35/14 (20060101); B01D 035/02 ()

Expiration Date: 06/26/2018