Air system bypass for oil separator
AssigneeAlliedSignal Truck Brake Systems Co.
InventorWilliam P. Fornof
Life of this patent
Estimating the term…
Abstract
An oil separator such as used in an air charging system includes a bypass assembly. During normal operation, airflow from an inlet to an outlet passes through the filter to remove oil and oil vapor from the compressed air. If a restriction or blockage occurs in the filter, as exhibited by a predetermined pressure differential across the filter, a bypass passage is opened to allow direct communication between the inlet and outlet ports. A spring defines the pressure responsive member that allows the filter to move away from the valve seat and establish communication between the inlet and outlet ports of the housing.
Claims14
A bypass assembly for an oil separator in an air charging system comprising:
- a cylindrical housing having an inlet for receiving supply air and an outlet for delivering air, both said inlet and said outlet being located proximate to one end of the cylindrical housing;
- an annular oil removal member interposed between the housing inlet and outlet for removing oil, particulate and liquid water from air;
- said annular oil removal member dimensioned for receipt in the housing so as to provide an annular space between the oil removal member and the housing, and for receiving airflow axially therethrough;
- a biasing member urging the oil removal member against the housing at the end that is proximate to said inlet and outlet below a predetermined pressure differential between said inlet and said outlet;
- and
- a passage between said inlet and said outlet that does not pass through said annular space for selectively bypassing the oil removal member and communicating between the housing inlet and outlet in response to movement of said oil removal member away from the housing at the end that is proximate to said inlet and outlet in response to a pressure differential between the inlet and outlet that exceeds said predetermined pressure differential.
A bypass assembly in an air charging system having an oil separator filter located downstream of a compressor, the bypass assembly comprising:
- a cylindrical housing having, located at one end of the cylinder, an inlet for receiving air from the compressor and an outlet for delivering air to a downstream use;
- an annular replaceable filter member for removing oil from the air dimensioned for receipt in the housing so as to provide an annular space between the filter member and the housing, and for receiving airflow axially therethrough;
- a biasing member urging the filter member against the housing at the end that is proximate to said inlet and outlet below a predetermined pressure differential between said inlet and said outlet;
- and
- a passage between said inlet and said outlet that does not pass through said annular space for selectively bypassing the filter member in response to movement of said filter member away from the housing at the end that is proximate to said inlet and outlet in response to a pressure differential between the inlet and outlet that exceeds said predetermined pressure differential so that compressed air is delivered to the downstream use if flow through the filter member becomes unduly restricted.
Dependencies are inferred from the claim text.