Derrick Manufacturing Corporation

Linatex Corporation of America

Robert G Derrick

William W Derrick

Robert E Ennis

James W Derrick

A vibratory screening machine having a main frame, a screen frame pivoted at substantially its midpoint on the main frame, a weir which receives a liquid-solid mixture to be screened, a discharge spout on the weir, a linkage interconnecting one end of the screen frame with the discharge spout, and a hand wheel effectively connected to the discharge spout to raise and lower it and thereby simultaneously adjust the inclination of the screen frame while maintaining the drop of the liquid-solid mixture being discharged onto the screen frame substantially constant in all inclined positions of the screen frame.

Vibratory screening machine with tiltable screen frame and adjustable

A non-clogging and wear-reducing screen assembly for a vibrating screening machine including a substantially rigid plate having upper and lower sides and having first and second pairs of opposite edges, attachment members formed integrally with a plate on a first pair of opposite edges for attachment to a vibrating screening machine, a plurality of spaced openings throughout the substantially rigid plate and extending in both directions between the first and second pairs of the opposite edges, borders on the plate surrounding the openings, a supporting screen on the upper side of the plate, first and second superimposed contiguous abutting screens overlying the supporting screen, and adhesive firmly securing the supporting screen and the first and second screens to the borders of the openings.

Non-clogging wear-reducing screen assembly for vibrating screening

A new and improved nonadjustable self-cleaning dewatering screen panel assembly suited to vibratory dewatering of fluid slurries containing fine particulate solid material is comprised of a rigid frame member and a substantially planar screen panel mounted within the frame and secured thereto under tension in both planar directions. The screen panel is a unitary one piece elastomeric sheet consisting of a plurality of pulsator portions and integral bordering stabilizer portions. The pulsator portions of the elastomeric panel are comprised of a multitude of substantially identical diaphram elements arranged in intimate, aligned and confronting relationship so as to present a smooth top screening surface. The diaphram elements are of uniform cross section throughout their depth and define a column of spaced parallel slits between individual abutting elements to permit limited, random, harmonic and pulsating motion of the flexible elements within the plane of the assembly in addition to the vibratory motion of the assembly. The screen panels may also be used for classification by size of particles in the range of 10-50 mesh.

Growing community of inventors

Buffalo, NY, United States of America

Robert G Derrick