Strainer arrangement for the oil sump of internal combustion engines

Claim 1

A device for the oil sump of internal combustion engines comprising, a strainer consisting of a wire screen and a body portion, said strainer surrounding the end of a perpendicularly related suction pipe along its periphery, a spring located in said strainer arranged to weigh upon a border of a by-pass opening in said wire screen and to press the border of the opening against a rigidly mounted closing member provided for the strainer and at the outer side thereof, said screen being deformable in the area of the opening and moving away from said closing member against the force of said spring when said screen is blocked thereby opening said by-pass opening for the passage of the oil to the inside of said screen, the device including a bell casing dipping into the oil in the sump with its edge and overlapping a portion of said screen at the outer side thereof, said body portion comprising a bottom cover on said screen which, together with said screen, is shaped in the form of a pot, a sealing collar located along the border of the screen opening and lying on said inner and outer sides of said screen, said closing member comprising a depression in said bell casing extending toward said screen, and said spring bearing against said collar.

Claim 2

A device for the oil sump of internal combustion engines comprising, a strainer consisting of a wire screen and a body portion, said strainer surrounding the end of a perpendicularly related suction pipe along its periphery, a spring located in said strainer arranged to weigh upon a border of a by-pass opening in said wire screen and to press the border of the opening against a rigidly mounted closing member provided for the strainer and at the outer side thereof, said screen being deformable in the area of the opening and moving away from said closing member against the force of said spring when said screen is blocked thereby opening said by-pass opening for the passage of the oil to the inside of said screen, the device including a bell casing dipping into the oil in the sump with its edge and overlapping a portion of said screen at the outer side thereof, said body portion comprising a bottom cover on said screen which, together with said screen, is shaped in the form of a pot, a sealing collar located along the border of the screen opening and lying on said inner and outer sides of said screen, said closing member comprising a depression in said bell casing extending toward said screen, and said spring bearing against said collar.

Claim 3

A device for the oil sump of internal combustion engines comprising, a strainer consisting of a wire screen and a body portion, said strainer surrounding the end of a perpendicularly related suction pipe along its periphery, a spring located in said strainer arranged to weigh upon a border of a by-pass opening in said wire screen and to press the border of the opening against a rigidly mounted closing provided for the strainer and at the outer side thereof, said screen being deformable in the area of the opening and moving away from said closing member against the force of said spring when said screen is blocked thereby opening said by-pass opening for the passage of oil to the inside of said screen, the device including a bell casing dipping into the oil in the sump with its edge and overlapping a portion of said screen at the outer side thereof, said body portion comprising a bottom cover on said screen which, together with said screen, is shaped in the form of a pot, a sealing collar located along the border of the screen opening and lying on said inner and outer sides of said screen, said closing member comprising the flange of a casing member which is located within said collar and surrounds said pipe end along its said periphery, said casing having slots therein and being secured to said bottom cover, means on said casing tightly engaging said pipe end, said collar bearing against said flange and said spring bearing against said collar.

Claim 4

A device for the oil sump of internal combustion engines comprising, a strainer consisting of a wire screen and a body portion, said strainer surrounding the end of a perpendicularly related suction pipe along its periphery, a spring located in said strainer arranged to weigh upon a border of a by-pass opening in said wire screen and to press the border of the opening against a rigidly mounted closing provided for the strainer and at the outer side thereof, said screen being deformable in the area of the opening and moving away from said closing member against the force of said spring when said screen is blocked thereby opening said by-pass opening for the passage of oil to the inside of said screen, the device including a bell casing dipping into the oil in the sump with its edge and overlapping a portion of said screen at the outer side thereof, said body portion comprising a bottom cover on said screen which, together with said screen, is shaped in the form of a pot, a sealing collar located along the border of the screen opening and lying on said inner and outer sides of said screen, said closing member comprising the flange of a casing member which is located within said collar and surrounds said pipe end along its said periphery, said casing having slots therein and being secured to said bottom cover, means on said casing tightly engaging said pipe end, said collar bearing against said flange and said spring bearing against said collar.

Claim 5

A device for the oil sump of internal combustion engines comprising a strainer composed of a wire net portion and a body portion, the strainer surrounding an end of a suction pipe on all sides, a spring in the strainer arranged to weigh upon a border of an opening of a wire net portion and to press the border of the opening against a rigidly mounted closing member provided for the strainer and at the side of the opening facing away from the spring, the net being deformable in the area of the opening and moving away from the closing member against the force of the spring, when the wire net portion is blocked, said device including a bell casing dipping into the oil in the sump with its edge and overlapping a part of the strainer facing away from the bottom of the sump, the body portion of said strainer being in the form of a lens-shaped sheet metal housing with the suction pipe arranged horizontally at the side of the housing and in which said wire net portion is a disk-shaped wire net portion and is provided with the opening, the border of which is equipped with a collar fitting under stress by means of a spiral spring against a collapsed part of a first housing wall serving as a closing member arranged below said wire net portion and provided on its periphery with inlets for the oil, a second housing wall facing away from the bottom of the sump having a second opening of the strainer and a plate closing the opening and forced by the spiral spring.

Claim 6

A device for the oil sump of internal combustion engines comprising a strainer composed of a wire net portion and a body portion, the strainer surrounding an end of a suction pipe on all sides, a spring in the strainer arranged to weigh upon a border of an opening of a wire net portion and to press the border of the opening against a rigidly mounted closing member provided for the strainer and at the side of the opening facing away from the spring, the net being deformable in the area of the opening and moving away from the closing member against the force of the spring, when the wire net portion is blocked, said device including a bell casing dipping into the oil in the sump with its edge and overlapping a part of the strainer facing away from the bottom of the sump, the body portion of said strainer being in the form of a lens-shaped sheet metal housing with the suction pipe arranged horizontally at the side of the housing and in which said wire net portion is a disk-shaped wire net portion and is provided with the opening, the border of which is equipped with a collar fitting under stress by means of a spiral spring against a collapsed part of a first housing wall serving as a closing member arranged below said wire net portion and provided on its periphery with inlets for the oil, a second housing wall facing away from the bottom of the sump having a second opening of the strainer and a plate closing the opening and forced by the spiral spring.