1
James W Derrick, Robert G Derrick: Non-clogging wear-reducing screen assembly for vibrating screening machine. Derrick Manufacturing Corporation, Joseph P Gastel, March 11, 1986: US04575421 (72 worldwide citation)

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 attachmen ...


2
William W Derrick, Robert G Derrick: Derrick Manufacturing Corporation, Joseph P Gastel, November 21, 1989: US04882054 (61 worldwide citation)

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 ...


3
Robert E Ennis, Robert G Derrick: Screen assembly and dewatering technique. Linatex Corporation of America, Derrick Manufacturing Corporation, Prutzman Hayes Kalb & Chilton, July 20, 1976: US03970549 (33 worldwide citation)

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 ...


4
Mitchell J Derrick, Robert G Derrick, James A Mooney: Joseph P Gastel, December 18, 2003: US20030230541-A1

A vibratory screening machine including a frame, a vibratory motor on said frame, a bed on the frame, a plurality of screens on the bed, a chamber below each of the screens, and a source of suction and pressure in communication with each of the chambers. A method of screening a slurry containing a m ...


5
Mitchell J Derrick, Robert G Derrick, James A Mooney: Derrick Corporation, Conley Rose PC, June 23, 2005: US20050133465-A1

A screen assembly comprising a support, a screen comprising peaks and troughs, and a coating on at least a portion of a plurality of the peaks. An apparatus for screening material comprising a frame, a motor mounted to the frame, a screen assembly supported by the frame, a chamber beneath the screen ...


6
Mitchell J Derrick, Robert G Derrick, James A Mooney: Derrick Corporation, Conley Rose PC, April 21, 2005: US20050082236-A1

Disclosed within are methods and apparatus for screening a slurry, in which the slurry is vibrated and conveyed across a screen and suction is applied from below the screen. Air, particles and liquid are drawn through openings in the screen and may be conveyed to a separator, where the particles and ...


7
Robert G Derrick, Ronald J Schiller: Ultrasonic system and method for affixing a screen sub-assembly to a plate. Adams and Reese, March 25, 2010: US20100071194-A1

In one embodiment of the present invention, a method of affixing a screen sub-assembly to a substrate includes the steps of depositing a thermoplastic material on a surface of the substrate and placing the screen sub-assembly on top of the substrate. The screen sub-assembly includes a screen element ...