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

Claim 0:
1. 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 front and rear edges, first and second side edges, a top surface, a bottom surface and a first plurality of mounting apertures located on the first side of the support member, each mounting aperture including at least one compression surface, 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 corresponding ones of the first plurality of mounting apertures; and
causing the first plurality of compression pistons to move from a retracted position to an extended position located closer to a centerline of the support member than the retracted position, wherein each of the compression pistons includes first and second compression surfaces that meet at a compression corner, and wherein when each of the first plurality of compression pistons move from the retracted position to the extended position, the at least one compression surface of a mounting aperture rides along one of the first and second compression surfaces of the compression piston until the at least one compression surface of the mounting aperture rests against the compression corner, and wherein resultant compressive forces applied to the first plurality of mounting apertures by the first plurality of compression pistons cause the screening assembly assume a concave shape and to be pushed into engagement with underlying concave support surfaces of the vibratory screening machine.