Patent ID: 11890647
Assignee: DERRICK CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 4:
5. A method of securing a screening assembly to a vibratory screening machine, comprising:
placing a screening assembly on a screen receiving portion of a vibratory screening machine, where the screening assembly comprises a support member and a screening surface, the support member having a front and a rear, first and second sides, a top surface, a bottom surface, a plurality of flow through apertures and a first plurality of mounting apertures along the first side, each mounting aperture including at least one compression surface located on an inner side of the mounting aperture relative to a centerline of the support member, wherein the screening surface is attached to the top surface of the support member, wherein placing the screening assembly on the screen receiving portion of the vibratory screening machine comprises locating the screening assembly such that a first plurality of compression pistons of compression mechanisms on the vibratory screening machine are aligned with the first plurality of mounting apertures; and
causing the first plurality of compression pistons to advance toward a centerline of the support member, wherein each of the first plurality of compression pistons has at least one compression surface that is configured to bear against a compression surface of a mounting aperture such that when the first plurality of compression pistons advance toward the centerline of the support member, resultant compressive forces applied to the compression surfaces of the first plurality of mounting apertures include a first component that is oriented horizontally toward the centerline of the support member and a second component that is oriented vertically downward, wherein the resultant compressive forces cause the screening assembly flex into a concave shape where a center of the support member is lower than the sides of the support member, and wherein the resultant compressive forces cause the support member to be pushed into engagement with underlying concave support surfaces of the vibratory screening machine.