Clifford G Hollyfield

US Patent:

20070193928, Aug 23, 2007

Filed:

Feb 23, 2006

Appl. No.:

11/360655

Inventors:

Clifford Hollyfield - Cumming GA, US
Allen Jackson - Atlanta GA, US

International Classification:

B07B 1/49

US Classification:

209405000, 209399000, 209403000

Abstract:

Screen separators and a screen tensioning system for separators that facilitates rapid measurement of screen tension. Each separator subframe screen is suspended between opposed subframe walls. Suitable linkages distribute vibration during the aggregate sifting process. Screen edge flanges are secured by tensioners that control a screen suspension bracket. A carriage bolt fitted through bracket orifices and the walls coaxially receive a resilient grommet captivated by an adjustable sleeve nut. As the nut is tightened, screen tension increases and the grommet diameter increases. A portable gauge with an internal U-shaped measurement sleeve is fitted over the deformed grommet to measure screen tension. A plurality of gauge calibration points bordering the deformed grommet determine applied screen tension.

US Patent:

53017978, Apr 12, 1994

Filed:

Jan 29, 1993

Appl. No.:

8/011282

Inventors:

Clifford G. Hollyfield - Roswell GA
Allen S. Jackson - Atlanta GA

Assignee:

J & H Equipment - Roswell GA

International Classification:

B65G 4500

US Classification:

198499

Abstract:

A conveyor belt cleaner system comprising a plurality of scrapers for contacting and cleaning a conveyor belt includes an adjustable, internal torsion assembly that avoids external springs. A scraper assembly comprises an elongated, generally tubular torque arm of square cross section having an integral, upwardly projecting flange that mounts the scrapers. The torque arm is mounted for rotation radially toward or away from the conveyor belt between suitable brackets. Internal Z-shaped torsion springs extend generally from the brackets to the torque arm interior. The springs yieldably bias the scraper assembly against the conveyor belt. One leg of the Z-shaped springs is torsionally locked within the torque arm between opposed corners, and the opposite end terminates in a drive key projecting from the brackets. Preferably a ratchet system is employed to lock the torque arm in a desired tension. A variety of different scraper blade shapes and configurations can be used.