Screw housing for a screw machine
AssigneeWerner & Pfleiderer
InventorWolfgang Worz
Life of this patent
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Abstract
A screw housing with a wearing insert for a two-shafted screw machine wherein the wearing insert has two spaced parallel bores to accommodate screw shafts located with their mutually parallel longitudinal axes in the principal plane of symmetry of the wearing insert. These shafts are spaced apart so as to form saddles at the connecting point of the bores. The insert housing has an external cross-section which is substantially constant along its axial length and is arranged in a cavity of the screw housing having the same cross-section.
Claims10
A screw housing with a non-circular wearing insert for a two-shafted screw machine, wherein the wearing insert has two spaced parallel bores to accommodate respective screw shafts, the mutually parallel longitudinal axes of the shafts lying in the principal plane of symmetry of the wearing insert, and being spaced apart to form saddles between the bores, the insert having substantially constant external cross-section along its axial length and being arranged in a cavity of the smae cross-section in the screw housing, the wearing insert having an external cross-section which is bounded exclusively by convex curves having different radial centers and which intersect along straight lines parallel to said longitudinal axes, while no angles are present in the curves in the region of the saddles and the insert is undivided in the region of the saddles.
A screw housing with a non-circular wearing insert for a two-shafted screw machine, wherein the wearing insert has two spaced parallel bores to accommodate respective screw shafts, the mutually parallel longitudinal axes of the shafts lying in the principal plane of symmetry of the wearing insert, and being spaced apart to form saddles between the bores, the insert having substantially constant external cross-section along its axial length and being arranged in a cavity of the same cross-section in the screw housing, the wearing insert having an external cross-section which is bounded exclusively by convex curves and respective straight curves which extend respectively from one of the convex curves to the next, while no angles are present in the curves in the region of the saddles and the insert is undivided in the region of the saddles.
A screw housing with a non-circular insert for a two-shafted screw machine, wherein the wearing insert has two spaced parallel bores to accommodate respective screw shafts, the mutually parallel longitudinal axes of the shafts lying in the principal plane of symmetry of the wearing insert, and being spaced apart to form saddles between the bores, the insert having substantially constant external cross-section along its axial length and being arranged in a cavity of the same cross-section in the screw housing, the wearing insert having an external cross-section which is bounded by at least two convex curves, while no angles are present in the external cross-section in the region of the saddles and the insert is undivided in the region of the saddles.
Dependencies are inferred from the claim text.