초록 ▼

A fluid filtering device employs a removably insertable filter element which must be positioned within the device in order to avoid an indicator signal thereby alerting the user to inadvertant use of the filtering device without the filter element. The device generally includes a filter housing and

A fluid filtering device employs a removably insertable filter element which must be positioned within the device in order to avoid an indicator signal thereby alerting the user to inadvertant use of the filtering device without the filter element. The device generally includes a filter housing and rotatably securable filter head having inlet, outlet and bypass fluid passageways. The filtering structure includes a tubular filter element attached to a concave plate having the seal secured to the outer rim thereof. The concave plate includes a central opening which allows fluid communication between one fluid passageway and the inner chamber of the filter element and a plurality of peripherally disposed openings which permit fluid communication between the other fluid passageway and the outer housing chamber. Bypass means, responsive to an increased pressure differential across the filter element such as occurs with clogging, are provided for direct fluid communication between the inlet and outlet passageways or direct fluid communication between the inlet and bypass passageways.

대표청구항 ▼

A fluid filtering device comprising: a housing defining an interior fluid chamber; a filter head securable to said housing, said filter head having an inlet port and an outlet port and fluid passageways connecting said ports and said fluid chamber; filter means removably insertable into said housing

A fluid filtering device comprising: a housing defining an interior fluid chamber; a filter head securable to said housing, said filter head having an inlet port and an outlet port and fluid passageways connecting said ports and said fluid chamber; filter means removably insertable into said housing chamber, said filter means comprising a filter element and sealing means secured to said filter element, wherein said sealing means is disposed between said housing and said filter head when said filter head is secured to said housing and wherein removal of said filter means causes removal of said sealing means; and means for indicating the absence of filter means in said housing, said indicating means comprising means for enabling the leakage of fluid between said filter head and said housing.